2024-03-29T09:21:44Z
https://ejabf.journals.ekb.eg/?_action=export&rf=summon&issue=15467
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Prevalence of helminth parasites of Clarias gariepinus and Tilapia zillii in relation to age and sex in an afrotropical stream
Amaka
Mgbemena
Francis
Arimoro
Innocent
Omalu
Unique
Keke
Fish is clearly regarded as the cheapest source of protein for man and other livestock, but fish farmers are constrained by massive mortality of fry and fingerlings due to helminth parasite invasion. Prevalence of helminthic parasite infection of two (2) commercially important and easily-culturable fish species of Nigeria (Clarias gariepinus and Tilapia zillii) was studied in relation to sex and fish age (length and weight). 51 samples of Claris gariepinus and 34 samples of Tilapia zillii in Chanchaga River were caught by the use of a trawling net over a period of 24 months (September 2014 and October 2016). Four (4) classes of parasites were encountered between Clarias gariepinus and Tilapia zillii as the two species were infected with similar parasites: Monogenea, Cestode, Nematodes, and Acanthocephala, although nematode parasites were by far the most abundant. The infection rates of both Clarias gariepinus and Tilapia zillii with helminth parasites were high as their percentage infection was 88.2 % and 91.2, respectively. Females were slightly more infected than the males for both fish species, although the difference was not significant (P < 0.05). Fishes of higher lengths and weight for both Clarias gariepinus and Tilapia zillii were more prevalent in parasitic infection (higher % infection) than their counterparts with lower lengths and weights (lower % infection). There were no striking differences between Clarias gariepinus and Tilapia zillii in terms of parasite representation, sex, and age parameters. This phenomenon may not be unconnected to the fact that both fish species shared similar environmental conditions, dietary composition, and feeding habits. This study recommends a change of feeding habits and dietary composition with age and immune system state in order to reduce the infestation of parasites with the goal of increasing field yield efficiency.
Nigeria
Parasites
prevalence
Clarias gariepinus
Tilapia zillii
2020
08
12
1
11
https://ejabf.journals.ekb.eg/article_102364_1b628073b51523d1ff691a415ab75094.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Alien Polychaete species and the first record of Branchiomma bairdi (McIntosh, 1885) from the Suez Canal and the Mediterranean coast of Egypt
Faiza
A. Abdelnaby
Eleven Polychaetes species, having a place with nine families, are accounted for in the current investigation. Six received: species out of eleven were alien species, and four were accounted for as Lessepsian migrant species. In the current examination, Branchiomma bairdi (McIntosh, 1885) was recorded just because of the Suez Canal and Port Said. Thus, this species is considered Lessepsian migrant species. Four species were recently detailed as Lessepsian species: Sigambra parva (Day, 1963); Ceratonereis mirabilis Kinberg, 1865; Armandia intermedia Fauvel, 1902; and Exogone simplex Hartmann-Schröder, 1960. Distribution of the Egyptian polychaetes is scant, subsequently, this investigation is viewed as an endeavor to find more types of alien polychaetes, which may have been available in the Egyptian waters for quite a while and have not yet been recognized. Likewise, this examination demonstrates that the polychaetes in the Egyptian waters have been inadequately explored and along these lines, the polychaete diversity in Egypt is still underestimated.
Alien species
Polychaeta
Lesspsian species
Suez Canal
Suez Gulf
2020
07
15
13
32
https://ejabf.journals.ekb.eg/article_102730_e3bf2075226625a0844d1f0d1a9b31be.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Antimicrobial agents from sea urchin (Diadema setosum) collected from the Red Sea, Egypt
Waleed
M.M. El-Sayed
Mostafa
M. Elshaer
Hassan
A.H. Ibrahim
Mohammed
E.A. El-Metwaly
In the present study, sea urchin; Diadema setosumwas collected from the Egyptian Red Sea coastline for investigating its antimicrobial activities. The physicochemical parameters of seawater samples were evaluated at sites where D. setosum was sampled. The data exhibited a little bit of variation of hydrographical measurements at the collection sites. In addition, the concentrations of dissolved nutrients in all stations were low, which revealed the oligotrophic condition of the Red Sea. The crude extract of D. setosum, was evaluated for antimicrobial activity against 15 pathogen isolates of bacteria, yeast, and fungi. The results showed fluctuations in antimicrobial activity values. The pathogens (Enterococcus faecalis ATCC 29219, Staphylococcus epidermidis ATCC 12228, Klebsiella pneumoniae ATCC13883, Bacillus subtilis ATCC 6633, Vibrio fluvialis, and Candida albicans ATCC10237) were not affected, while the other pathogens were clearly influenced. The positive values were recorded in the range of 9.3 to 18.0 mm. Additionally, the minimum inhibitory concentration (MICs) obtained from the crude extract of D. setosum were in the range of; 25 to 50 µg/mL against the affected microbes. Moreover, the activity of several commercial antibiotics was examined and compared with the results of D. setosum crude extract. Gram-positive bacteria showed obvious susceptibility towards most of the tested antibiotics, while Gram-negative ones showed more resistance. It was observed that the inhibition of D. setosum crude extract was lower than the potent commercial antibiotics in many cases. On the other side, the results of GC-MS/MS analysis of the crude extract revealed the presence of several bioactive constituents. Actually, it had 18 major compounds most of them known to possess antimicrobial activities.
antimicrobial activity
Sea Urchin
Red Sea
Marine resources
2020
07
01
33
51
https://ejabf.journals.ekb.eg/article_103181_c4b98c7c5587afc7c69fcfc455adf8e2.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Milking of Dunaliella bardawil as a biotechnological process for continuous production and extraction of β-carotene in a two-phase system
Hoda
H. Senousy
Effat
F. Shabana
Hend
Y. Mohammad
Algal milking has been established as a biotechnological process for the continuous extraction of β-carotene from the Dunaliella bardawil in two-phase systems. The effect of limited nitrogen, high light intensity, and their combination on the production and extraction of β-carotene was followed. The light intensity of 15000 lux was the best stress factor for β-carotene production. A short-term milking experiment for 15 days at 15000 lux and different mixing rates 100, 120, and 150 rpm was performed. The results indicated that the highest total β-carotene production (intracellular and extracellular) was recorded at 150 rpm and 15000 lux with 20% v/v dodecane as a biocompatible solvent. In a preliminary experiment, the light intensity 2000 lux stimulated the cells to recover rapidly and complete the milking for a longer time than the recovery at 15000 lux. In a long-term milking, the experiment consists of ten cycles β-carotene was produced and extracted at 15000 lux and 150 rpm for two days and the cells were recovered at 2000 lux for three days, the process was continued for fifty days. At the end of the experiment, some cells remain alive and were continuously milked for β-carotene. Finally, the total productivity of β-carotene was 58.01 mg/l and the extraction efficiency was about 64%.
Dunaliella bardawil
β-carotene
milking
Two-phase system
Dodecane
2020
07
16
53
67
https://ejabf.journals.ekb.eg/article_103182_ef068a7b9ca063542ed97d1a434c7f55.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Length-weight relationships of 12 indigenous fishes and 3 shellfishes from mangrove and floodplain ecosystems in Southwestern Bangladesh
Md. Robiul
Hasan
Abdullah
Al Mamun
Md. Yeamin
Hossain
The length-weight relationships (LWRs) were studied for 616 individuals covering 10 families of 12 fish species (i.e., Planiliza subviridis, Opsarius barna, Nandus nandus, Clarias batrachus, Odontamblyopus rubicundus, Taenioides cirratus, Anabas testudineus, Mystus gulio, Mystus tengara, Oreochromis mossambicus, Puntius sophore and Hyporhamphus limbatus) and 3 shellfish species (i.e., Penaeus monodon, Fenneropenaeus indicus, Metapenaeus brevicornis). Total length (cm) and body weight (g) were measured for each individual. The allometric co-efficient, b values of studied species ranged between 2.03 (M. gulio) to 3.27 (O. mossambicus) and were highly significant (P < 0.001) for all species. Our results contribute to updating the online database (FishBase or SeaLifeBase) of respective fish and shellfish species.
Shell-fish
Bangladesh
Fisheries management
Length-weight relationship
Mangrove fisheries
2020
07
18
69
76
https://ejabf.journals.ekb.eg/article_103532_770333e942cd1b6b681d93580d4a58f9.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Impact of eco-hydrological factors on growth of the Asian stinging catfish Heteropneustus fossilis (Bloch, 1794) in a Wetland Ecosystem
Md. Rabiul
Hasan
Zannatul
Mawa
Habib-
Ul-Hassan
Md. Ashekur
Rahman
Sumaya
Tanjin
Naveed
Ahmed Abro
Karim
Gabol
Md. Abul
Bashar
Saleha
Jasmine
Jun
Ohtomi
Md. Yeamin
Hossain
This study demonstrates the impacts of eco-hydrological factors (Temperature, rainfall, dissolved oxygen, pH, total dissolved solids, and alkalinity) on the growth of Asian stinging catfish Heteropneustus fossilis (Bloch, 1794) in the Ganjer Beel wetland ecosystem, northwestern Bangladesh. This study was conducted in the Gajner Beel wetland ecosystem which is located at Sujanagar under Pabna District, NW Bangladesh. Eight hundred forty-five (845) fish individuals were collected from January to December 2019. Total length (TL) and body weight (BW) were measured using the measuring board and electronic balance with 0.01cm and 0.01g, precision. The length-weight relationship was calculated by this equation: W = a × Lb. TL was ranged from 6.30–24.10 cm and BW was 1.20–83.94 g. Overall growth pattern (GP) was a positive allometric of H. fossilis in this wetland. Among the eco- hydrological factors temperature, DO and pH showed significant correlation with the growth pattern of H. fossilis. Finally, these findings will be useful for further studies and to suggest a sound policy for the sustainable management of H. fossilis in wetland ecosystems.
Growth pattern
Eco-hydrological
Heteropneustes fossilis
Gajner Beel
Wetland Ecosystem
2020
07
28
77
94
https://ejabf.journals.ekb.eg/article_105438_8bc1acfce69d16d898e5b3b05406624d.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Semi-field and field trials to control Biomphalaria alexandrina and Bulinus truncatus, intermediate host snails of schistosomiasis in Egypt by the plant molluscicide Luowei/TDS 4%
Mohamed
A. El-Emam
Fathia
A. Gawish
Mohamed
R. Habib
Wei
Wang
Le-Ping
Sun
Dirk
Engels
Neng-Min
Zhang
Tie-Wu
Jia
Xiao-Nong
Zhou
Controlling the snail intermediate hosts of schistosomiasis is an efficient and rapid method for reducing or eliminating the transmission of this disease. The present study aimed to assess the molluscicidal activity of Luowei/TDS 4% against Biomphalaria alexandrina and Bulinus truncatus under semi-field and field conditions in Egypt. Moreover, its effect on Schistosoma mansoni miracidial viability and infectivity to B. alexandrina snails and on cercarial production from infected snails were evaluated. In the present study, miracidia of Schistosoma mansoni and S. haematobium were exposed to sublethal concentrations of Luowi/TDS 4% and miracidial mortality rates in the test and control groups were recorded. The effect of exposure to LC10 and LC25 of Luowei/TDS 4% after 1, 2 and 3 weeks of B. alexandrina infection with miracidia on their cercarial production was determined. The molluscicidal activity of 2LC90Luowei/TDS 4% against B. alexandrina and B. truncatus was tested under semi-field and field conditions. Luowei/TDS 4% exhibited a promising molluscicidal potency against B. alexandrina and B. truncatus as their LC90 values were considerably low, 2.851 and 1.936 mg/L, respectively, after 24 h of exposure. Moreover, infection rates of B. alexandrina with S. mansoni and cercarial production from snails exposed to LC10 and LC25 of Luowei/TDS 4% post miracidial exposure were reduced. Moreover, Luowei/TDS 4% at semi-field and field trials proved to be a potent molluscicidal agent against schistosomiasis intermediate host snails as mortality rates of free and caged sentinel snails from these trials were considerably high ranging from 87% to 100% after 24 h of treatment with 5.702 mg/L (2LC90 for B. alexandrina snails). Luowei/TDS 4% should be considered as a candidate molluscicide in schistosomiasis control programs. Implementation of this plant molluscicide in operational schistosomiasis control strategies will minimize the ecological side-effects associated with replacing synesthetic chemicals.
Luowei/TDS 4%
Schistosomiasis
snails
control
molluscicides
2020
07
21
95
109
https://ejabf.journals.ekb.eg/article_104140_aa607a8260d361bcc195228bd9d7e246.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
The effects of nesting ground temperatures on incubation and hatchability of loggerhead turtle Caretta caretta inhabiting the Mediterranean Sea Coast, Libya
Aldoushy
Mahdy
Amani
F. A. Ahmed
Mahmoud
Y. M. Idris
Ibrik
M. A. Mohamed
Mohamed
A. A. Samie
Alaa
A. M. Mayof
Saadi
A. B. Emgower
Rashad
E.M. Said
Few studies were conducted on the long-term effect of temperature on loggerhead turtle Caretta caretta nesting ground and hatchability especially on the eastern coast of Libya. The period of turtle eggs´ incubation and their hatchability are heavily influenced by the ambient environmental factors. Temperatures have gained world attention in the last decades. The current study discusses the profile habitat temperatures (air, water, and nesting ground) of C. caretta during the breeding season from June to August 2019. In addition, rainfall and moisture were assessed to address and predict the factors threatening this biotope. The current study has revealed that the two studied sites (Al-Qurdaba and Umm-Alfraes shores) differed significantly in the ecological criteria from one month to another. Also, the percentages of hatchability differed in relevant to these criteria. Because climate change is an important threat to most poikilothermic animals worldwide, this study provided background information that should be considered in predicting models about the potential effects of global warming on the success of nesting in the eastern Mediterranean Sea coast of Libya.
Loggerhead turtle
Caretta caretta
Temperature
Hatchability
nesting ground, Mediterranean Sea
Libya
2020
07
20
111
124
https://ejabf.journals.ekb.eg/article_103646_4bb3fb98ecfeb49c416fbd42d9b1bf5d.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Distribution and Diversity of Living Natural Resources from the Most Northern Red Sea Islands, Egypt: I- Hard and Soft Corals
Ahmed
Ghallab
Aldoushy
Mahdy
Hashem
Madkour
Alaa
Osman
The present study is a part of a monitoring program of the most important living natural resources, investigating the substrate cover distribution in the most northern islands of the Egyptian Red Sea. These resources include both hard and soft corals. This study was made during winter 2017 using Line Intercept Transact (LIT) to monitor the diversity and distribution of those resources. Eight islands located at the entrance of the Suez Gulf were surveyed using standard methods. Monitoring work for the hard and soft corals using transect was done by diving and snorkeling in the study areas. In the current study, the highest percentage cover of hard corals was 84 % recorded at Ghanim Island compared with the lowest cover of 41.3 %, estimated at Ashrafi Island, with mean percentage cover for all Islands averaged 60.1%. Acropora and Stylophora were the most abundant hard coral genera with a percentage cover of 35.8% and 17.6 %, respectively. Soft corals were the highest at Tawila Island with a percentage cover of 6% and the Nephthea was the highest soft coral genera with a percentage cove of 1.0 %. The monitoring work showed the diversity and distribution of these natural resources, especially coral reefs, and the extent to which these resources are affected by human activities, especially tourism activities, and also extraction and drilling for oil near the study areas. Observations on hard and soft corals in the study areas may be useful and important in the development of those areas in the future.
Diversity, Resources
Hard and Soft corals
North Islands
Red Sea, Egypt
2020
07
20
125
145
https://ejabf.journals.ekb.eg/article_103627_06b3c5124ef18fdbe8fead298e20e41f.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Marine Algae in Egypt: distribution, phytochemical composition and biological uses as bioactive resources (a review)
Sayed
Rashad
Ghadir
A. El-Chaghaby
Marine algae (Seaweeds) are photosynthetic organisms living in seas and oceans. They are known to have several benefits and are recognized as a source of several important bioactive compounds. In the present review, we present brief information concerning marine algae, their classification, distribution, and importance. Also, we are focusing on studies concerning marine algae collected from Egyptian coasts. The review highlights the important studies concerned by evaluating the bioactivity and chemical composition of marine algae in Egypt. The present review contains the main results of experimental studies discussing the antioxidant, antibacterial and anti-cancer activities of seaweeds. It also contains principle results for studies about the use of seaweed biomass as adsorbents for water treatment and as environmental pollution bio-monitors. The data provided in this review offer a scientific background about marine algae in Egypt that could be very helpful for researchers working in this area.
Marine algae
Macroalgae
seaweed
coast
Egypt
Bioactivity
2020
07
20
147
160
https://ejabf.journals.ekb.eg/article_103630_cfe4e893d2d60bb6b4117f9ddc496875.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Spatial and Temporal Distribution of Plankton in a Tropical Reservoir, southwestern Nigeria
Adedolapo
A. Ayoade
Ashiat
Aderogba
Spatial and temporal variations in the distribution of plankton of a tropical reservoir were investigated for six months. Chlorophyceae was richest in the phytoplankton community in terms of the number of species and individuals. They were more abundant in the late rainy /early dry season with Pediastrum simplex and Coelastrum chodati being the dominant species. Constant species occurred only in Chlorophyceae which included Spirogyra, Closterium sp., Coelastrum chodati, Pediastrum simplex, Ulothrix zonata and Scenedesmus quadricauda. Cyanophyceae developed mainly in the late dry season months (reached peak in March) with Microcystis flos-aqua being dominant. In the zooplankton community, Crustacea had the highest number of individuals and were more abundant in the late dry season. Camptocercus sp., Bosmina sp., and Daphnia magna were the main species. Rotifers had the highest species number with peaks observed in the late rainy/early dry season. The common species encountered included Chromagaster sp., Epiphanes sp., Gastropus sp., Nolthoca sp., Trichocerca sp., and Brachionus sp. The common protozoan species were Ichthyophthrius, Chilodonella, Prorodon, and Colpoda. The diversity indices calculated varied spatially; phytoplanktonic organisms were more diverse in Station 1 with the least evenness, highest evenness occurred in Station 2. The increase in the total number of taxa encountered in this study compared to previous studies and the implication of Microcystis flos-aqua being the dominant blue-green algae were discussed.
Awba reservoir
Blue-green algae
Zooplankton
temporal variation
Nigeria
2020
07
01
161
181
https://ejabf.journals.ekb.eg/article_104724_42d4a6efda1d49e4fde6ef83d4de7c00.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Light and Scanning electron microscopic investigations on gravid female Anilocra sp. (Isopoda: Cymothoidae) infesting Tilapia zillii in Qarun Lake, Egypt.
Mahmoud
Abd El-Atti
Severe infestations of isopods on some economic fishes inhabiting Qarun Lake were observed during April 2020. The present light and Scanning electron microscopic studies have been carried out on gravid female Anilocra sp.parasitizing Tilapia zillii collected from this Lake. A stereomicroscopic study has been carried out to illustrate the morphological characteristics of this cymothoid isopod. Detailed Scanning electron microscopic investigations were achieved on surface ultrastructural modifications of ovigerous females such as cephalic sensory organs, piercing-sucking mouthparts, pereopods, pleopods, and different developmental stages of ova within the marsupium. Further molecular, taxonomic, and ultrastructural studies must be done to provide profitable knowledge helping in the identification of these deleterious isopods devouring economic fishes of Qarun Lake.
Scanning
Cymothoidae
Anilocra sp
Isopoda
Qarun Lake
2020
07
21
183
196
https://ejabf.journals.ekb.eg/article_104225_da271c89cf62ca14cf6747fd5a77d911.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
A contribution on the pathogenicity of Fusarium oxysporum isolated from cultured Nile tilapia (Oreochromis niloticus) with trials for the treatment
Ola
Hassan
Azza
Hassan
Nadia
Abd El Ghany
Awad
Abd El-baky
Magdy
Hanna
Mohamed
Abd El Aziz
Fusarium oxysporum is one of the systemic mycosis that affects fish. This study was designated to determine the pathogenicity of Fusarium oxysporum in Oreochromis niloticus with a clinical trial for treatment. Fusarium oxysporum isolated from naturally infected Oreochromis niloticus collected from different fish farms at different governorates in Egypt namely, El Fayum, kafr El-sheikh and Alexandria. Fish samples with a total number of 100 were collected during the period from May to October 2019. Microbial examination revealed infection with Fusarium oxysporum that was identified by molecular sequence analysis of the internal transcript spacer (ITS) region of their ribosomal RNA gene. The confirmed isolate of Fusarium oxysporum, was used in experimental infection to determine its Pathogenicity followed by a trial for treatment of clinically affected fish with Curcumin and H2o2. The clinical signs associated with experimental infection were exophthalmia, abnormal swimming behaviour, granuloma in different internal organs including gills, liver and spleen with enlargement of spleen and congestion of liver. Examination revealed severe pathological alteration gills, liver and spleen manifested by severe congestion of the central venous sinuses of the primary gill lamellae as well as the blood vessels of the secondary lamellae associated with lamellar edema , congestion of hepatoportal blood vessels and sinusoids associated with perivascular edema and presence of variable granulomas embedded in the splenic parenchyma . Curcumin and H2o2 showed a mild beneficial effect as a treatment for Fusarium oxysporum infection in cultured Oreochromis niloticus.
Fusarium oxysporum
pathogenicity
Treatment
Nile tilapia
2020
07
22
197
215
https://ejabf.journals.ekb.eg/article_104139_26b8c75ab3fb984823bd0edb87cca006.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Bioremoval of heavy metals from polluted soil by Schoenoplectus litoralis (Schrad.) Palla and Cyperus rotundus L. (Cyperaceae)
Elsayed
Nafea
B.
Šera
The present work aimed to assess the ability of plant species namely, Schoenoplectus litoralis and Cyperus rotundus belonging to family Cyperaceae in bioremoval of heavy metals from polluted soil by As, Pb, Cd, Zn. Soil planted with both plant species was regularly irrigated (twice a week) by water containing different concentrations of 10, 20, 30, 40, and 50 ppm of the metals in a laboratory experiment. The tested metals residues were determined in the shoot and root system of plants after 45 days and expressed as mg/g dry weight of the plant. C. rotundus had a high power for absorbing and accumulating heavy metals from the contaminated soil by higher rate by roots than by shoot system (root: As 183 mg/g, Pb 82 mg/g, Cd 122 mg/g, and Zn 137 mg/g, shoot: As 145 mg/g, Pb 512 mg/g, Cd102 mg/g, and Zn 110 mg/g ). S. litoralis absorbed and accumulated heavy metals from soil in less amount (root: As 148 mg/g, Pb 46 mg/g, Cd 113 mg/g, and Zn 127 mg/g, shoot: As 132 mg/g, Pb 44 mg/g, Cd 100 mg/g, and Zn 105 mg/g). The bioaccumulation power increased with the increase of heavy metal concentrations in soil and with the time exposure in the both plant species.
Accumulation
Bioremediation agents
contaminated soil
Heavy metals
Road soil
2020
07
23
217
226
https://ejabf.journals.ekb.eg/article_104704_9180fa482ac3db4ec1d74de9936703fa.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Genetic Investigation of Some Perciformes Fish Species Using Karyological Analysis
Ali
H. Abu Almaaty
Iman
M. Bahgat
Mariam
E. E. Suleiman
Mohamed
K. Hassan
In the order Perciformes, there are many of fishes which have economic importance and have cytogenetic biodiversity. Cytogenetics is becoming an important biodiversity-detection tool and used to measurement biodiversity evolutionary aspects. A remarkable degree of chromosomal conservatism (2n=48, FN=48) has been identified in several families of Perciformes. However, some families exhibit greater karyotypic diversity. The present study was aimed to characterize cytogenetically the chromosomal formula, chromosome numbers and karyotypes of three fish species of order Perciformes; Colisa chuna, Osphronemus goramyand Betta splendens using karyological analysis. All Fish species were collected from ornamental fish farms in Egypt. The diploid chromosome number, chromosomal formula, and fundamental numbers of the three species under study were 2n=46, 20m+26sm and FN=92, 2n=48, 2m+46a and FN=50, and 2n=42, 12sm+14st+16a and FN=68 respectively. These results may open the way for using cytogenetic analysis in modern taxonomy.
Cytogenetic Analysis
Chromosomes
Karyotype
Perciforme fish
2020
07
25
227
236
https://ejabf.journals.ekb.eg/article_104661_c677ca3dd25225af1e1ecbf87f97510d.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Chromosomal Formula of Four Marine Fish Species from The Mediterranean Sea in Egypt
Ali
H. Abu Almaaty
Hala
E. Abd-Alaty
Osama
A. Abbas
Mohamed
K. Hassan
The karyological analysis is an important tool for the detection of biodiversity; it is also used for measuring biodiversity evolutionary aspects. Several families of Perciformes showed a remarkable degree of chromosomal conservation (2n=48, FN=48). The present study was aimed to characterize cytogenetically the chromosomal formula, chromosome numbers and karyotypes of four fish species of order Perciformes;(Argyrosomus regius, Pomadasys stridens, Sparus aurata and Dicentrarchus labrax) collected from the Mediterranean Sea in Port Said. The Mitotic chromosomal spreads illustrated that all chromosomes of these four species are acrocentric chromosomes, the chromosomal formula for all four fish species was 48a and the fundamental number for all four fish species is (FN=48). The relative length ranged from 1.82% to 5.61% in Argyrosomus regius 2.73% to 5.61% in Pomadasys stridens, 1.91% to 5.83% in Sparus aurata and in Dicentrarchus labrax it ranged from 2.48% to 5.59%. All species had centromeric index equal zero and arm ratio equal ∞.
Genetics
fish
karyotypes
Chromosomes
Perciformes
2020
07
25
237
248
https://ejabf.journals.ekb.eg/article_104650_005b988b50a9f82e06d7847abbb6b4cf.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Effect of heavy metals in irrigation water of different fish farms on the quality of cultured fish
Zakaria
I. M. El-Khatib
Ahmad
M. Azab
Hamdy
A. H. Abo-Taleb
Ahmed
N.M. Al-Absawy
Mohamed
M.M. Toto
The present study aimed to study the effect of irrigation water quality in different fish farms in Egypt on the quality of Nile tilapia, Oreochromis niloticus, produced from these fish farms. Four fish farms (El-Abbasa, Edko, Mariout and Bahr El-Baqar) which irrigated with different water sources were selected to study the effect of some heavy metals (iron, copper, zinc and lead) on fish quality produced from these farms during the; period of fish culturing from April 2018 to November 2018.
Results indicated that most of the highest averages of all heavy metal concentrations in water, sediment and fish muscular tissues were recorded from Bahr El-Baqar fish farm and their lowest values from El-Abbasa fish farm. The highest contamination factors for most heavy metals were recorded in Bahr El-Baqar fish farm and the lowest in El-Abbasa fish farm. The present study concluded that El-Abbassa fish farm has low pollution and the other fish farms (Edko, Mariout, and Bahr El-Baqar) have progressive deterioration of the site quality.
Nile tilapia
Oreochromis niloticus
Heavy metals
Egypt, Fish farm
Contamination factor
Pollution load index
Metal Pollution Index
2020
07
25
261
277
https://ejabf.journals.ekb.eg/article_104648_21ffcf51537aa1017c02436ce3065ca4.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Biocontrol of the vibriosis in the white shrimp (Litopenaeus vannamei) using organic acids in the feeding.
Juan
Valenzuela-Cobos
Cristian
Vargas
Fernanda
Garcés
Ana
Grijalva
Raúl
Marcillo
In this research 3 formulations were used; pellets were mixed with lactic acid, formic acid, citric acid, sorbic acid and aquaculture binder (M1), pellets were mixed with citric acid, fumaric acid, sorbic acid and aquaculture binder (M2), and pellets were mixed with formic acid (M3). Infected shrimps (Litopenaeus vannamei) with Vibriosis were fed on 200 g of pellets mixed with the 3 formulations twice daily for 5 days. Using the mixture 1 (M1) was obtained the lowest mortality of 10.00%, highest percent survival index of 80.00% and also the highest weight of 54.00 g, whereas using the mixture Control (only pellets) was obtained the highest mortality of 50.00%, lowest percent survival index of 0.00% and also the highest weight of 43.00 g. In addition, differences were found between the results of the 3 mixtures tested, infected Litopenaeus vannamei with Vibrios using the mixture 1 (M1) did not present symptoms of Vibriosis after of the biocontrol test. The mixture 1 (M1) showed the highest content of protein and ash being of 344.20 and 145.70 g.Kg−1 respectively. The results showed the use of organic acids is directly related to the control of Vibriosis and the improvement in the growth of juvenile white shrimp Litopenaeus vannamei.
Biocontrol
Litopenaeus vannamei
white shrimp
mixtures
Growth
2020
07
26
279
287
https://ejabf.journals.ekb.eg/article_104727_67ab1e831d49a15e975722488c898cfb.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Comparative morphological and histological studies on the adaptation of esophagus and stomach to the feeding habits in some coral reef fishes at Hurghada, Red Sea, Egypt
Walaa
Shalaby
The present study deals with the morphological and histological adaptations of the esophagus and stomach of some coral reef fishes (Parupeneus forsskali, Popilloculiceps longiceps and Acanthurus sohal) and their feeding habits.
Results showed that the esophagus of carnivorous fish, Parupeneus forsskali, piscivores fish, Popilloculiceps longiceps and herbivores fish, Acanthurus sohal is a short, narrow and distensible muscular tube to conduct the food. Owing to the esophageal mucosa of the three fishes is of a stratified type. The great distensibility of the esophagus is an adaptation for feeding. So a relatively large object can be swallowed. In the P. forsskali the mucosa containing large mucus glands. On the other hand in P. longiceps and A. sohal the mucosa is thrown into primary and secondary folds. The stomach of P. forsskali is sac-like in shape. While the stomach of P. longiceps is with a great distensibility giving the bag-like shape to enable the fish to take relatively huge prey. The stomachs of these species have a vast amount of gastric glands in the cardiac portion, while, in the pyloric one has a very thick layer of muscularis. The stomach of A. sohal is U shape. It can be divisible into cardiac and pyloric regions. Cardiac region is highly specialized as a masticator organ for the fish that eat hard vegetable matter. The epithelium of the pyloric stomach develops into a thin layer of columnar cells towards the lumen and a thick layer of gastric glands towards the base to help in digestion.
In conclusion, the esophagus and stomach of carnivorous fish, P. forsskali, piscivores fish, P. longiceps, and herbivores fish, A. sohal are subjected to diverse and significant variations and much modification in accordance with the food type and feeding habits.
Coral reefs
fish
Comparative study
esophagus
Stomach
feeding
Gastric glands
2020
07
28
289
306
https://ejabf.journals.ekb.eg/article_105059_5cc8c7cedb7942d31599b14ef18b7b81.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Advanced Studies on the Endo-Parasitic Diseases (Digeneasis and Larval Cestodiasis) Affecting some Marine Fishes in Ismailia Governorate
Ismail
Eissa
Salah
M. Mesalhy
Mona
Ismail
Eman
Aboelhassan
Aya
Attia
Maather
EL-Lamie
A seasonal study was performed on 500 marine fishes (100 Engraulis encrasicolus, 100 Sardina pilchardus, 100 Caranx rhonchus, 100 Tilapia zillii, 100 Dicentrarchus punctatus) that collected randomly from Suez Canal in Ismailia Province. Some examined fishes showed sluggish movement, emaciation, and hemorrhages all over the body, beside abdominal distension, congestion of internal organs, and enteritis. Encapsulated plerocercoids were detected in the abdominal cavity and liver. The total prevalence of parasitic infestation was 66.0% (highest in autumn (76.8%) and the lowest in summer 44.8%). The highest parasitic prevalence was recorded in Engraulis encrasicolus (75%), followed by Dicentrarchus punctatus (72%), Tilapia zillii (69%), Caranx rhoncus (67%) then Sardina pilchardus (47%). The isolated parasites were digenetic trematodes (encysted metacercariae, Erilepturus hamati, Erilepturus tiegsi and Clupenuroide sp.) and cestodal larvae (Callitetrarhyncus sp. and plerocercoid). Cestodal plerocercoids were the highest prevailing parasites (28.6%). A negative correlation between infestation and fish body weights were detected. Confirmation of Callitetrarhynchus plerocercoid was done using PCR. Histopathological changes were also recorded in the infested fishes. It could be concluded that infestation with digeneasis and larval cestodiasis might have negative impacts on fish health.
marine fish
Digeneasis
Larval cestodiasis
PCR
prevalence
2020
07
29
307
321
https://ejabf.journals.ekb.eg/article_105449_98cc1054adf3e6167693c6997b085c05.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Assessment of weather and climate variability over the Western Harbor of Alexandria, Egypt
Badea
M. B. Mahfouz
Alaa
G. M. Osman
Samy
A. Saber
Hassan
M. M. Kanhalaf-Allah
The management of any harbor depends primarily on meteorological conditions. This study aimed to analyze the meteorological conditions over Western Harbor of Alexandria, using meteorological data recorded on an hourly basis from the automated weather station in the harbor from January 2007 to December 2018. The results revealed a general trend of a slight increase in the mean annual air temperature anomaly over the study period at a rate of 0.03°C/year. The mean annual sea-level pressure anomaly also showed an increasing trend at a rate of 0.011 h Pa/year. The dominant wind directions over the harbor were north-northwest during the study period. The lowest annual mean wind speed of 7 kt occurred in 2007, while the highest wind speed of 11 kt occurred in 2010. There was a trend of an increase in the mean annual wind speed anomaly at a rate of 0.12 kt/ year. In addition, there was a general trend of an increase in the mean annual relative humidity anomaly at a rate of 0.219 %/year. Four, six, eight, and ten extreme values were detected for air temperature, sea-level pressure, wind speed, and relative humidity, respectively. However, oceanographic parameters should also be examined to strengthen our findings. Nonetheless, mitigation and awareness plans should be prepared and implemented for the harbor.
Meteorological conditions
Climate variability
Western Harbor
alexandria
Egypt
2020
07
30
323
339
https://ejabf.journals.ekb.eg/article_105861_fee98676e8129e3ba82a35d879e919b4.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Ecological study on Seaweeds of Earthquake Crack in Ras Muhammad National Park, South Sinai, Egypt.
Emad
A. Ghazala
Muhammad
M. Hegazi
Abdel-Rahman
I. F.
Temporal variability and describe the abundance and distribution of marine benthic seaweeds that inhabit walls of Ras Muhammad earthquake crack and their relationship to the diagenetic nature of the substratum reef using the field investigation. The study period extended seasonally from spring to winter 2015. The assessment of seaweeds abundance and distribution were performed using the Dominant, Abundant, Frequent, Occasional and Rare (DAFOR) scale, which is a method of defining species abundance and community richness, especially during intertidal rapid surveys, such in our case when the precise numbers or coverage of a species in the field is difficult to measure. A total of 19 seaweeds taxa were collected from Ras Muhammad Earthquake crack belonging to four different algal phyla and had been identified to the level of the species level following the standard taxonomically guides which dealing with the seaweeds of the Indo-pacific region and the general references of the tropical and subtropical areas. The Chlorophyta is the most diverse division and prevailed with 9 taxa followed by Rhodophyta (5 taxa), then Ochrophyta (3 taxa), and the last division is Cyanophyceae (2 taxa). This study emphasizes the significant impact of seasonal variations, especially temperature, and Salinity on the temporal distribution and Biomass of seaweeds taxa in Ras Muhammad Earthquake crack.
Seaweeds
Macroalgae
Earthquake Pool
Ras Muhammad
Red Sea
Egypt
2020
07
29
341
351
https://ejabf.journals.ekb.eg/article_105871_c5e7b7f474c012fc9138b0ad40783fe0.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Effects of the marine microalga (spirulina) on protein deficiency signs in hepatocellular carcinoma-bearing mice
Aya
M. Shehata
Asmaa
A. Mahmoud
Yomna
I. Mahmoud
Nagui
H. Fares
Spirulina is an edible blue-green microalga that is rich in numerous bioactive compounds especially proteins. Protein deficiency is associated with various disease conditions in human, including cancer. The present study was carried out to evaluate the effect of the marine microalga “spirulina” on protein deficiency signs in hepatocellular carcinoma-bearing mice. Hepatocarcinoma was induced by a single injection of diethylnitrosamine (100mg/kg, intraperitoneally) followed by 22 weekly injections of carbon-tetrachloride (0.5 mg/kg, i.p). Spirulina (250 and 500 mg/kg bw) was given orally, from week 25 to 28, after the establishment of hepatocellular carcinoma. The results showed that HCC-bearing animals several clinical signs of protein deficiency including weakness and skeletal muscle loss, decreased body weight, hair thinnening and loss, in addition to abdominal edema. On the other hand, spirulina-treated animals recovered the signs of HCC-associated protein deficiency. In conclusion, spirulina proved to be an adequate protein source to ameliorate the protein deficiency-related alterations in HCC-bearing animals.
Spirulina
marine alga
protein deficiency
Hepatocellular carcinoma
mouse
2020
08
11
353
359
https://ejabf.journals.ekb.eg/article_106500_ff4444531577db895e325e3b31903d01.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Influences of feeding habitat and age composition on the growth patterns, length-frequency and gut contents in maternal paddlefish Polyodon spathula (Walbaum, 1792).
Mahmoud
Elnakeeb
Lydia
M. Vasilyeva
Natalia
V. Sudakova
Adelya
Z. Anokhina
Ahmed
G. A. Gewida
The study aims to study the impact of the diet shift and feeding behavior of the paddlefish different age groups on the growth during the spawning season. Habitat affected paddlefish prey selection or foraging success is a striking force that promotes either dominance or submissiveness of brood fish to reproductive or growth performance under Russian aquaculture conditions. Four age groups were studied depending on years of commissioning (age composition: 23, 18, 17, 16; for years 1997, 2002, 2003 and 2004, respectively) and registered divergence in their growth rates throughout spawning season 2020. Growth patterns of 59 mature paddlefish were studied based on length-weight relationship, length frequency, and the growth coefficient (K).
The results revealed that moderate growth pattern was observed in the 2nd group Isometric (b = 3), whereas the rest groups recorded negative allometric growth (b < 3). The data obtained from gut contents were consistent with the previous growth performance results. Major five prey categories (benthic macro-invertebrates, macro-invertebrate larvae, detritus, zooplankton and phytoplankton) were observed within fish stomach, which exposed through natural feeding in the rearing ponds. The values of chi-square test (χ2) results showed that frequencies in one or more prey items of a four age were strong significance (p-value = 8.93E-17 & χ2 = 1.219, 1.051, 1.066 & 1.032; for 2nd, 3rd, 4th and 1st, respectively). Overall results propose maternal paddlefish prey election and growth patterns can be highly variable, and merely heavily reliant on feeding habitat and swimming behavior across spawning season.
Diet shift
Growth patterns
gut contents
Paddlefish
Polyodon spathula
Spawning season
2020
08
11
361
374
https://ejabf.journals.ekb.eg/article_106609_eda661dddd371ce9974cf0309a76277a.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Spatial and temporal size structure abundance of the blue swimming crab (Portunus pelagicus) in Tiworo Strait, Southeast Sulawesi, Indonesia
Oce
Astuti
Naslina
Alimina
La
Sara
Emi
Emiyarti
Ani
Rahmadani
This study aimed to analyze spatial and temporal size abundance and sex ratio patterns of blue swimming crab (BSC). It was conducted from June to December 2018. Samples were taken monthly using collapsible pots and gillnets from different habitat characteristics of intertidal (station A), river mouth (station B), seagrass (station C and D), and depth of > 30 m (station E). Each sample was sexed, measured its CW (cm), and weighed its body weight (g). Those were classified according to sex and CW into: < 6.0 cm (juvenile), ≥ 6.0 - 9.0 cm (mature), and ≥ 9.0 cm (adult) and counted to perform abundance and sex ratio of each station and month. Results showed that juveniles were more abundant in station A, while mature abundance has no distribution pattern. Adults tended to be abundant in station E. Those may affect sex ratio in all stations and months. Male juvenile sex ratio preponderated over female in station A, while in other stations have no pattern. On the contrary, mature females preponderated over males in station A, but have no pattern in other stations, while adults showed females preponderated over males in station E. It implies that females of the blue swimming crab (BSC = Portunus pelagicus) prefer deep water having high salinity to release eggs.
Abundance
sex ratio
Size structure
Spatial and temporal
Portunus pelagicus
2020
08
14
375
392
https://ejabf.journals.ekb.eg/article_107583_f7c580cce97ecb7456f02bafe1cf8c80.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Genetic Relationship Between Two Species of Genus Dicentrarchus Based on SCoT Markers and SDS-PAGE
Ali
H. Abu Almaaty
Hala
E. Abd-Alaty
Osama
A. Abbas
Mohamed
K. Hassan
In the present study, the start codon targeted (SCoT) technique was used for measuring the genetic variability between two fish species of family Moronidae (Dicentrarchus punctus and Dicentrarchus labrax), these species were collected from the Mediterranean Sea, Port Said, Egypt. Eleven SCoT primers were used in the study of generating different lengths of amplicons that ranged from 150bp to 1800bp (SCoT-2, SCoT-3, SCoT-4, SCoT-6, SCoT-7, SCoT-8, SCoT-9, SCoT-10, SCoT-28, SCoT-35 and SCoT-46). The polymorphism percent ranged from 18% with SCOT-28 primer to 75% with SCOT-6. The genetic similarity between the two species was 75.5%. Protein analysis using Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) was also performed in this study producing a total of 22 bands that ranged in size from 19KD to 200KD. Each of the two species produced 22 bands.
Genetics
SCoT
bands
SDS-PAGE
Moronidae
fish
2020
08
12
393
402
https://ejabf.journals.ekb.eg/article_107200_410da7c79d443aaa3f87b118120bd785.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Accumulation and rate of degradation of organotin compounds in coastal sediments along the Red Sea, Egypt
Alaa
M. Younis
Coastal sediments’ quality may become impaired due to anthropogenic pressures, risking the well-being of humans and the ecosystem concerned. In this study, butyltin contamination in Egyptian Red Sea Coast’s sediments was assessed for the first time, following the ten-year ban on antifouling paints’ harmful organotin. We collected sediment samples from ten stations based on the proximity of anthropogenic activities. TBT, MBT, DBT, ƩBT, and TSn’s concentrations were within the following ranges 7–220, 4.2–78, 14.7–339.8, 3.5–48.8 ng Sn g-1, and 0.09–1.47µg Sn g-1, respectively. The highest of butyltin concentrations were recorded in summer. TBT was the most abundant (52.79%–53.13%) while the averages of percentages of DBT were 18.45% and 19.33%, whereas MBT values were 27.88% and 28.42% in winter and summer, respectively. A significant positive correlation was found between butyltin derivatives and geochemical characteristics such as grain size of investigated sediments and organic matter. Contamination patterns of butyltin derivatives in the sediments of the area of study were TBT > MBT > DBT and most of the investigated samples had BDI values around one, which proves TBT has no recent input and degraded immensely. Meanwhile, a portion of 80% of the samples was established to be highly tributyltin contaminated.
Organotin compounds
TBT contaminants
Butyltins derivatives
sediments
Red Sea
pollution
2020
08
21
413
436
https://ejabf.journals.ekb.eg/article_108918_1d73eb6f8c9bb8f7f90516008be4238d.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Fishing gear allocation and catch landing of purse seine in southern coast of Sulawesi, Indonesia
Eko
Sri Wiyono
Mahiswara
Mahiswara
Hufiadi
Hufiadi
Various theories regarding the linkage of fish resources and human resources (fishermen) have been discussed and become alternatives in relation to fisheries management. One of the most important to be studied in studying human interrelationships and fish resources is the dynamics of fishing gear. The fishermen’s decision to operate fishing gear is essentially a function of various factors, both internal and external. In order to describe the factors that influence fisherman behaviour in allocate fishing gear, we have studied the relationship of external factors to fishing gear allocation and the catch landing. On this occasion, we have studied the fishing gear allocation pattern and correlation of external factors (fishing ground, fishing seasons, and their interaction) to purse seine allocation and their catch landing in Bone, South Sulawesi. The results of the study indicated that purse seine allocations were similarly between season but significantly different between fishing grounds. Meanwhile, the main catch landing relating to purse seine catches (scads and skipjack) were significantly different between seasons and fishing grounds partially. However, the further analysis confirmed that interaction between the fishing ground and fishing season only affects skipjack but does not affect scads.
fishing ground
fishing season
Scads
Coast of Sulawesi
Skipjack tuna
2020
08
17
437
448
https://ejabf.journals.ekb.eg/article_108522_c35f729a032d43b7fb37589296910750.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Pathological, bacteriological and seasonal prevalence of Aeromonas hydrophila, vibrio vulnificus, Proteus vulgaris and Pseudomonas aeruginosa; infecting Oreochromis niloticus in some Egyptian fish farms
Islam
Elgohary
Jehan
I. Abd Elatief
Nasser
G. Fadel
Alaa
E. Eissa
Mahmoud
A. Mahmoud
In this study, ninety fish samples showing clinical signs of septicemia were collected from two private fish farms of Oreochromis niloticus; forty fish were sampled from fayoum and fifty were from sharkia governorate, Egypt, during four seasons (autumn 2018 to summer 2019). The sampled diseased fish represented 10% of the fish, showing clinical signs and the mortality rate along the year was 15 %. In the postmortem examination, the signs of septicemia on the affected fishes were clear in most of the internal organs. The histopathological results were fully described in different organs of the affected fish. Bacteriological examination revealed isolation of Aeromonas hydrophila with prevalence rate along the year 77.33 % with the highest prevalence in summer (100%) in El Fayoum and it was 29.72 % along the year with the highest prevalence in autumn 33.33% in El Sharkia governorate. Vibrio vulnificans in El Fayoum governorate was not isolated but it was isolated from El Sharkia with prevalence rate of 16.22%; with the highest prevalence in autumn (33.33%,). Proteus vulgaris was identified in both governorates with overall prevalence rate of 6.67% in El Fayoum and the highest prevalence was recorded in both autumn and spring seasons (11.11%). In El Sharkia it was 27.03% but with the highest prevalence in summer (100%). Pseudomonas aeruginosa was also recorded with the prevalence rate of 20% along the year in El Fayoum governorate with the highest prevalence in winter 55.56% and it was 27.03% in El Sharkia governorate with the highest prevalence in winter 43.75%. In antibiotic sensitivity testing, each microorganism showed resistance against erythromycin except Vibrio vulnificus that showed sensitivity. Aeromonas hydrophila and Proteus vulgaris showed resistance to colistin sulphate and susceptibility to sulpha-trimethoprime. Vibrio vulnificus and Pseudomonas aeruginosa showed resistance against sulpha-trimethoprime and sensitive against colistin sulphate.
Pathology
A. hydrophila
V. vulnificus
P. vulgaris
P.aeruginosa
O. niloticus
2020
08
20
467
482
https://ejabf.journals.ekb.eg/article_108585_c5e7ff10d31640867f2a0fcc53027daa.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Effect of climate change on growth and reproduction of Nile tilapia (Oreochromis niloticus, L.) from Bahr Shebeen Canal, Delta of Egypt.
Elsayed
A. Khallaf
A.A.
Alne-na-ei
F. A.
El-messady
Esraa
Hanafy
Global warming was noticed in the last five years, and its effects on various biological processes of animals are imminent. Therefore, this study was carried out to examine such effects on the growth and reproduction of Oreochromis niloticus, from Bahr Shebeen Canal. Growth in length of fish was significant, where r2 was 0.93 and 0.97 for males and females, respectively. The weight-length relationship exponent was found to be 2.5842 and 2.7994 for males and females, respectively. The samples under study were found to fall into 5 age-groups. The condition coefficient showed a seasonal decrease in going from winter to spring for both sexes. The sex ratio for males and females O. niloticus was found to be 1:0.53. GSI values for both sexes indicated that sexual maturity is achieved at a smaller length and younger ages in females than males. Seasonal variations of GSI values indicated multiple spawning. Fecundity showed a gradual decrease in going from winter to autumn. It was also noticed that it decreased with the excessively high temperatures of the summer months. Those predictions were discussed and compared to previous studies, which could be related to the prevalent warmer weather.
Global Warming
Growth
Reproduction
Oreochromis niloticus
Bahr Shebeen
2020
08
20
483
509
https://ejabf.journals.ekb.eg/article_108404_86c73f582079db5297aa289becd844a3.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Effect of location and grilling process on organochlorine pesticides residues in muscles of different fish species, Egypt
Shaban
A. El-Sherif
Sayed
M. Ibrahim
Abdel-Rahman
S. Abouzied
Safwat
Abdel-Ghafour
Hassan
M. Rabea
Adel
A. El-Lahamy
Haitham
M. El-Sayed
Kamel
S. Abo –Zeid
This study aimed to investigate concentrations of organochlorine pesticides (OCPs) residues in muscles of different fish species; mullet, Nile tilapia, and catfish obtained from different locations (Nile River, Wadi El-Rayan Lake, Edku and Burullus lagoons) during July 2019. Also, it aimed to study the effect of the grilling process on these concentrations in Nile tilapia as abundant fish. Results showed that 15 compounds of OCPs were identified in raw fish samples and grilled tilapia. Concerning fish species, mullet from Edku, tilapia from Burullus, and catfish from Wadi El-Rayan were the lowest polluted than other ones. With regard to the location of catch, the Nile River was mostly polluted with OCPs and Wadi El-Rayan followed by Burullus and Edku lagoons. On the other side, grilling process reduced all compounds of OCPs; the loss rate in grilled tilapia was taken the following order; ∑HCH (72.59- 97.08%) >∑DDT (61.52- 94.94%) > ∑Heptachlor (58.37- 87.53%) > ∑Endosulfan (50.98-79.17%) > Endrin (32.06-83.95%) >∑Aldrin (21.15-100%). In conclusion, this study proved that concentrations of OCPs compounds in raw fish muscles were lower than the maximum permissible limits (MPLs), and grilling decreased sharply all OCPs compounds. So, the muscles of raw and grilled investigated fish samples were considered safe for human consumption.
Nile tilapia
Mullet
catfish
River Nile
Edku lagoon
Burullus Lagoon
organochlorine pesticides
Grilled fish
2020
08
22
511
522
https://ejabf.journals.ekb.eg/article_108921_00055a71c9aa87818efd36f998325575.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Fishing gears, catch composition and length at first capture of the common fish species in Bardawil lagoon, Egypt
Sahar
F. Mehanna
Abdel Hamid
M.S. Eid
Badiaa
A. Ali
Mohammed
S. Aabed
Bardawil Lagoon is one of the northern lakes in Egypt and it is a part of the Mediterranean coastal lands of Sinai. It plays an essential role in fish production in Egypt, where it produces very economically important fish species such as seabass, seabream, sole, grey mullet, and white grouper. Bardawil lagoon is the least polluted wetland in Egypt and represents one of the least polluted in the entire Mediterranean region with an average area of about 650 Km2 and employing up to 3,000 fishermen. The fishery in Bardawil lagoon is seasonal generally from early April to the end of December. This measure was taken to protect the seabream and seabass leaving the lagoon for the spawning migration. In Bardawil lagoon, total annual commercial landings varied between 2226 and 5410 tons during the last 20 years (Annual statistical report 2018). In 2018, only 2610 tons were landed corresponded to a value of almost 130 million LE. A number of fishing methods are used in the lagoon including Dabba or trammel nets, El-Bouss or veranda, Kalsa or trawl nets and Lines or sinner. The present work investigated the fishing methods used in Bardawil lagoon, its characteristics, the catch composition, catch trend, and the length at first capture of the most common fish species in the lagoon.
Bardawil Lagoon
fishing gears
catch composition
catch trend
Management
2020
08
22
523
538
https://ejabf.journals.ekb.eg/article_108593_4481825829137780c9bc8f5dd0660172.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Effect of the different stocking density on behavior, performance and welfare of the Nile tilapia (Oreochromis niloticus)
Azhar
F. Abdel Fattah
Fayza
A. Ahmed
Al-Sadik
Y. Saleem
Hesham
H. Mohammed
Mohamed
I. Youssef
Enas
N. Said
The current study was carried out to detect the influence of various stocking densities on behavior and the biological performances of Nile tilapia (Oreochromis niloticus) fingerlings. Fingerlings (30±5g) were stocked in duplicate at four stocking densities; low density 15 (group1 as control), medium density 25 (group 2) and high density such as 35 (group 3) and 45 (group 4) fish/aquarium, in glass aquaria 30×40×100 cm for 10 weeks.
The results showed that the surfacing behavior was higher in high stocking density reared groups than the low and medium density reared groups. Moreover, the aggressive behavior with all patterns was markedly higher in fish raised at high stocking density than the low and medium density raised fish. The crossing test showed that low density raised fish was more active than medium and high stocking density raised fish. Final body weight was markedly decreased with increased density, While, the fish reared at low stocking density showed a marked increase of daily weight gain (DWG). Finally, high-density culture is considered as chronic stress for Nile tilapia fingerlings due to increasing surfacing behavior and the appearance of all patterns of aggression.
Nile tilapia
stocking density
Surfacing behavior
Aggressive patterns
Crossing test
2020
08
01
539
560
https://ejabf.journals.ekb.eg/article_109369_8fcd83e7c7de8029d0b4cd16d1b84712.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Mesozooplankton dynamics in the coastal waters of Sharm El-Sheikh, Red Sea, Egypt
Mohsen
El-Sherbiny
Mahmoud
Hanafy
Mohamed
Dorgham
The zooplankton community was studied monthly in shallow embayments around Sharm El-Sheikh, northern Red Sea, in relation to physical-chemical properties. The study recorded a total of 91 species, amounting monthly to 2169 - 12319 ind./m3 in the whole area and 3382 - 7835 ind./m3 at the sampling sites. Copepods were the most diverse group represented by 68 species, with clear species diversity of calanoids (48), and less so for cyclopoids (13) and harpacticoids (7). Copepods constituted 68.2% of the total zooplankton count. Thirty two species were persistent in the whole area, including 28 copepods, while all other zooplankton groups were pronouncedly less diversified. Among these groups, larvaceans formed 3.1% and cladocerans (2.1%). The meroplankton representatives played a crucial role, forming 23.7% of the zooplankton count. The Bray-Curtis analysis demonstrated high similarity between sites I, III, and IV. Eleven epipelagic, mesopelagic, or bathypelagic forms were recorded in the shallow waters of Sharm El-Sheikh, indicating the effect of winter vertical mixing on zooplankton distribution.
Zooplankton
Copepods
Sharm El-Sheikh
Red Sea
2020
08
25
563
587
https://ejabf.journals.ekb.eg/article_110612_2240bc928f64ed1e88c54227543dab52.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Effects of dietary turmeric and clove powder on growth and immune response of the Nile tilapia
Afaf
ِِAbdel Rahman
Zeinab
El-Bouhy
Mohammed
Wahbah
Shaimaa
Ahmed
A feeding trial was conducted to investigate the effect of dietary incorporation of turmeric powder (TP), Curcuma longa and clove bud powder (CBP), Syzygium aromaticum on growth, antioxidant, and immune response of Nile tilapia, Oreochromis niloticus, as well as its resistance to pathogenic bacteria, Proteus mirabilis. Fish (27.56 ± 0.15 g) were randomly allocated into four groups in triplicates. The first (control) group was fed basal without any feed addition. The second and third groups were fed on a basal diet enriched with 0.5% TP and 3% CBP, respectively, and the fourth group was fed on a basal diet enriched with a mixture of TP and CBP for 6 weeks. After the 6 weeks of feeding, fish were intraperitoneally injected with P. mirabilis, and mortalities were recorded up to 14 days. Fish growth parameters were significantly improved in all groups fed TP and/or CBP enriched diets as compared to the control group. The immune response of fish that were fed on dietary TP+CBP mixture followed by TP then CBP before and after bacterial challenge showed significant augmentation in terms of lysozyme activity, nitric oxide, and total protein especially total globulin, as well as the hepatic level of antioxidant enzymes [catalase (CAT), superoxide dismutase (SOD) activities and reduced glutathione content (GSH)] over those of the control fish. The fish challenged with P. mirabilis showed the highest mortality rate and lowest relative percentage of survival; whereas the highest RPS was recorded in the fish fed TP+CBP mixture and TP (75%). Hence, TP and/or CBP could be used as a dietary additive to improve growth and immune response as well as to protect Nile tilapia against P. mirabilis infection.
Oreochromis niloticus
Curcuma longa
Syzygium aromaticum
Blood
Disease
immunity
2020
08
21
589
608
https://ejabf.journals.ekb.eg/article_108916_e99cefe93ec5881af58225527ff1a808.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Assessment of some heavy metals contamination and thier pollution indices in water and fish organs of (Oreochromis niloticus and Clarias gariepinus) in Burullus and Edku lakes, (A comparative study)
Alam Eldeen
Farouk
Enas
M.G. Mansour
Mekawy
M.T.
The present study aims to investigate some heavy metal concentrations in water and fish organs (liver, gills and muscle) of Oreochromis niloticus and Clarias gariepinus in Edku and Burullus lakes. In addition, estimate pollution indices such as Pollution index (PI), heavy metal evaluation index (HEI), contamination index (Cd), and its potential health risk assessment (HQdermal). Also, the health risks from fish muscle consumption (THQS) and Bioconcentration factor (BCF). Heavy metals concentrations in water were found in the following order Fe > Zn > Mn > Pb > Cd in Burullus lake, whereas they follow the order of Fe > Mn > Pb > Zn > Cd in Edku lake. Where, Edku lake ranked as second after Burullus lake in accumulation of metals (Mn, Zn, Pb) with slightly increasing in concentrations of Fe and Cd. For, the same heavy metals in fish organs of the two examined species in Burullus and Edku lakes had the order: Fe> Zn> Mn> Pb> Cd and the residues of all investigated heavy metals in liver and gills of the both examined fish species were much higher than that in their muscles. The pollution indices showed that both lake's water is highly contaminated based on PI, HEI and Cd. where PI average values of Fe and Cd were higher in Edku lake than Burullus lake. While, PI average values for Mn, Zn and Pb were higher in Burullus lake than Edku lake. Values of HQdermal, THQS and their HI were lower than 1 for all heavy metals from all sites in both lakes during the study seasons. From the above results, it's concluded that the two lakes suffer from different types of pollution and the control of this pollution depends on the treatment of sewage, agricultural and industrial wastes before dumping into these lakes.
Burullus Lake
Edku Lake
Heavy metals
Oreochromis niloticus
Clarias gariepinus
Pollution indices
2020
08
24
609
637
https://ejabf.journals.ekb.eg/article_109886_0d94484006d7b7207eb25f9388dc3072.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Association Between the Distributions and Chemical Composition of Aquatic Macrophytes and Bacterial Community Structure in Some Irrigation Canals (Rayahs) of the Nile River, Egypt
Amal
A. Othman
Amany
M. Haroon
Variations in distribution, species composition, and chemical constituents of aquatic macrophytes of Al-Rayah El Tawfiky (T) and Al-Rayah El Monoufy (M) in addition to their relations with bacterial communities structure and water variables were studied over the period from spring 2014 to winter 2015. Ten of the aquatic macrophytes species related to 7 families and 9 genera were recorded. Myriophyllum spicatum was the most dominant species, the autumn season and Al-Rayah (M) were the richest in species numbers. Protein, lipid, nitrogen, phosphorus, and potassium were detected at higher concentrations in Ceratophyllum demersum from Al-Rayah (T), however organic matter and nitrogen-free extracts contents attended their highest values in Potamogeton nodosus from Al-Rayah (M).
Microbial analyses indicated the presence of total bacterial counts and the total diazotrophs in high population densities (Up to 105). However, total and fecal coliforms populations are exceeding the permissible limits cited by World Health Organization, recorded their highest numbers in spring at the site of Al Rayah (M) which was occupied by Potamogeton nodose and Myriophyllum spicatum. A significant difference in chemical composition, distribution pattern, the community structure of aquatic macrophytes, and bacteria attributed to the seasons and site differences, in addition to the nutritional potential of the analyzed macrophytes species especially submerged ones were recorded.
Nile River Rayahs
Macrophytes, Chemical composition
Macro-element
Bacterial indicator of pollution
Diazotrophs
2020
08
23
639
660
https://ejabf.journals.ekb.eg/article_109285_101abf48da0eb10dc2adf78992b8b437.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Survey on Some Ectoparasitosis in Moolgarda seheli from Suez Canal area, Egypt
Ismail
A. Eissa
Mona
M. Ismail
Mona
Abdelwahab
Heba
I. Abdel-Mawla
Amina
A. Dessouki
Shimaa
A. Fakhry
Hassnaa
Elsheshtawy
This survey study has been applied to a total number of 200 Moolgarda seheli that collected randomly and seasonally from different areas of the Suez Canal at Ismailia Governorate. Infected fish showed no obvious clinical abnormalities except in case of heavy infestation with the ectoparasites, where some infested fishes revealed respiratory manifestation and surface swimming. Other fishes showed hemorrhagic areas on the gill cover, abdomen, and fins. The results of this survey revealed 2 phyla of economically important fish parasites which were three copepods (Lernanthropus species, Caligus lichiae, and Lepeophtheirus lichiae) isolated from the gills and one monogenean (Benedenia sekii ) isolated from the gill and the buccal cavity of all examined fish. The total prevalence of infestation was 31% where Lernanthropus, Caligus species and monogenea were 24.5%, 5% and13%; respectively while the mixed infestation between crustaceans with monogenea was 7%. The seasonal prevalence of ectoparasitic infestation was the highest in winter (67.5%) followed by spring then autumn and the lowest was summer (10%). The highest infestation ofLernanthropus species was recorded in the winter (50%) and the lowest in summer (10%). On other hand, the highest infestation of Caligus was highest in the spring (33.33%) and disappeared in the other seasons. The seasonal prevalence of monogenean infestation was the highest in the spring (43.33%) and disappeared in the autumn and summer. Molecular identification of Benedenia species using PCR analysis of the 28SrRNA(mix of C1/D2 pairs) generated larger sequence fragments which were amplicons at approx. 800 bp. The partial sequencing and phylogenetics of the positive sample revealed that our sample was closer related to Benedenia sekii followed by Benedenia sciaenae from Australia which were 97.9% and 97.2%; respectively. The histopathological changes of infested fish with ectoparasite revealed severe atrophy of the gill lamellae along with mechanical destruction, other fish revealed focal infiltrations with leukocytes, in addition to congestion of the gill arch.
Moolgarda seheli
Suez Canal Lernanthropus
Benedenia
Phylogeny
2020
08
01
449
466
https://ejabf.journals.ekb.eg/article_117945_8a532f10059ee467f5f7c790c7664778.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2020
24
5
Impacts of the climatic changes on the fishery activities Along Egyptian coast of Mediterranean
Noura
H. S. Hassan
Ebtessam
E. E. Mohamed
This research is mainly directed to study the impacts of the climatic changes on the fishery activities along the Egyptian coast of the Mediterranean. Such a major aim can be achieved through the study of a group of sub-objectives: identify some of the social and economic characteristics of the respondents, identify the knowledge of the respondents about the climate changes and their causes, identify the knowledge of the respondents about the environmental impacts of such climate changes (Coastal erosion and diminishing marine resources). A well prepared and pretested questionnaire was used to collect the data needed for this research. Data were gathered from (152) respondents. The data were analyzed statistically by using SPSS program. It is clearly identified from the data analysis that, the averages of the social and economic characteristics of the respondents were in the middle category and the lower category, the lowest sources of information used by the respondents were fish extension.
Climate Change
Mediterranean coast
Coastal erosion
human activities
2020
08
01
403
411
https://ejabf.journals.ekb.eg/article_129180_574857ac65093e9fdf77669b4e209a09.pdf