eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-07
22
3
1
12
10.21608/ejabf.2018.8761
8761
Original Article
Composition and Spatio-Temporal Distribution of Zooplankton Community in the Egyptian Red Sea Coast at Hurghada
Mohamed A. Abu El-Regal
1
Ahmed El-Wazeer
2
Zeinab Sh. Abou Elnaga
3
Aalaa A. Amr
4
Zooplankton survey was carried out between August 2015 and July 2016 along the Egyptian Red Sea coast of Hurghada to describe the species composition and spatial-temporal variations of zooplankton community in this region. The area of study was divided into four transects vertical on the shore line and three zones parallel to the shoreline. Plankton samples were collected bimonthly by plankton nets of 350 µ and 500 µ mesh size and 100cm mouth opening. Volume of water filtered in each tow was calculated by the flowmeter added to the plankton net and the density of zooplankton was calculated. The relationship between the abundance of different zooplankton groups and some environmental parameters in the area was studied. Diversity indices were determined using PRIMER5. A total of 415933 individuals/m3 representing different groups of zooplankton were collected. Zooplankton were most abundant at MAR1 and had the lowest abundance of zooplankton at MAR3 where 26338 individuals/m3 were collected. Zooplankton community is dominated by copepods that formed about 53% of all zooplankton collected. Zooplankton was abundant in the warmest period of the year from May to August with a peak of abundance in July and August, where 91267 individuals/m3 and 97466 individuals/m3 were collected respectively. There was a significant relationship between temperature and the abundance of zooplankton.
https://ejabf.journals.ekb.eg/article_8761_bc64b69b05473c726c6e9b1f6dce0fa6.pdf
Zooplankton
physical parameters
Distribution
diversity
Red Sea
Egypt
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-08
22
3
13
24
10.21608/ejabf.2018.8765
8765
Comparative morphology on some sclerectanian corals in Arabian Gulf and the Egyptian Coast of the Red Sea
Mohammed A. Sadek
1
Fedekar F. Madkour
2
Mohammed I. Ahmed
3
Mahmoud H. Hanafy
4
The present study aimed to examine the morphological variations occur in the same species of some sclerectinian corals inhabiting Red Sea and Arabian Gulf to establish basic understand the lineage between scleractinian coral species in such geographic region. 126 specimens of the most abundant sclerectinian corals inhabiting the Egyptian coasts along Red Sea and Gulf of Aqaba and Arabian Gulf were collected. Mico- and macro-morphological identification was used to identify and investigate coral species at selected sites. Eight species were recorded (Acropora pharaonis, Acropora humilis, Acropora digitefra, Pocillopora verrucosa, Stylophora pistillata, Porites harrisoni, Platygyra daedalea, Favia pallida) belong to six genera. Analysis of variance (ANOVA) has been made for the corallite and branch measurement with sites. The preset study revealed that corallite diameter are highly influenced by geographic distribution in all species except corallite of Stylophora pistillata. Branch diameter are highly influenced (p<0. 05) by geographic distribution only in Acropora humilis and Acropora digitefera, while Acropora pharaonis, Pocilliopora verrucosa and Stylophora pistillata did not vary among sites. Comparing specimens collected from Arabian Gulf with those from Red Sea and Gulf of Aqaba, corallite and branch measurements of Stylophora pistillata, Platygyra deadalea were very near and morphological characters were identical. Corallite and branch measurements of Favia pallida were very close at all locations. Only in Red Sea specimens (Fanous), costa and paliform was absent.
https://ejabf.journals.ekb.eg/article_8765_7910715b11f5ae6a3f71d8b61e1666c6.pdf
Scleractinian corals
Morphology
Red Sea
Arabian Gulf
Egyptian coast
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-08
22
3
25
36
10.21608/ejabf.2018.8766
8766
Original Article
Effect of lipid feeding regimes and conditioning periods on gonads fatty acid profile and reproductive performance of the Nile tilapia (Oreochromis niloticus) broodstock
Osama M. El-Husseiny
1
Ashraf M. A. Goda
2
Rania S. Mabroke
3
Ali Matter
alimatter89@yahoo.com
4
https://ejabf.journals.ekb.eg/article_8766_837b559affe2932edc52dd03d6dd17fa.pdf
Nile tilapia
Oreochromis niloticus
reproductive performance
Gonads
fish oil
soybean oil
feeding regimes
conditioning period
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-08
22
3
37
54
10.21608/ejabf.2018.8767
8767
Original Article
Morphological re-description and molecular characterization of Heterocypris salina (Brady, 1868), a new recorded ostracod species in Egypt.
Fawzia S. Ali
1
Ebtesam A. Yousef
2
Mahmoud H. Hegab
3
Nehad Khalifa
nehadkhalifa@hotmail.com
4
Ostracods are microscopic crustaceans living in a wide variety of environments. They are very important as the key food item for fish and benthic macro-invertebrates and are used as bio-indicators for environmental changes and pollution. The identification and taxonomy of the Heterocypris species are so challenging issues because of their morphological plasticity that is often related to environmental factors. The studied species is recorded for the first time in Egypt. Therefore, Morphological evidences for the identification of this species were thoroughly recorded using the scanning electron and stereo microscopes. Furthermore, DNA barcoding was used to confirm the morphological identification. The morphological examination identified the species as Heterocypris salina, where it revealed an accurate description for its carapace, valves and appendages. However, few dissimilarities with the description of that species by other authors were noted. The sequencing of partial sequences of 28S, 18S rRNA genes confirmed the results of the morphological identification. New barcodes for 28S, 18S rRNA genes and cytochrome oxidase subunit 1, COI gene, of H. salina were added to GenBank databases. Based on morphological and genetic evidences, this study adds new species to the biodiversity inventory of the aquatic environment of Egypt. Furthermore, COI sequence for Heterocypris salina has been submitted on the GenBank databases for the first time to be used as a marker for identification of such species in the future.
https://ejabf.journals.ekb.eg/article_8767_e8ad81d93e458157cf7c1a7fa3595d64.pdf
Ostracods
Heterocypris salina
Taxonomy
Morphological description
molecular characters
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-08
22
3
55
69
10.21608/ejabf.2018.8768
8768
Original Article
Effects of a plant product (Thymol) on the salivary gland of the giant slug Limax maximus in Egypt (Histological and Ultrastructural study)
Omaima. M. Mustafa
1
Thymol monotrpenoid compound is naturally found in many plants. It exhibites molluscicial activity against the land snails and slugs. The present study aims to describe histological, histochemical and ultrastructural investigations to display and clarify any deleterious effects probably evoked post- thymol application in the salivary gland of Limax maximus. To achieve the intended goal in this respect, the slugswere divided into three groups; the first group served as control, the second and the third groups received LC50 & LC90 of thymol for 48 hours in food. The histological results revealed that thymol had adverse effects on type’s cells of salivary gland including vacuolated cytoplasm and deformed nuclei in different cells. The histochemical results indicated the presence of neutral mucopolysaccharides in the cells of salivary gland. The ultrastructural results revealed rough endoplasmic reticulum had been fragmented into small stacks and patches heterochromatin also appeared. Therefore, the treated slugs with LC90 of thymol can be recommended for controlling the target slugs and further studies are needed to evaluate their efficacy as safe economic molluscicides in the field, instead of using chemical pesticides that could pollute the environment.
https://ejabf.journals.ekb.eg/article_8768_d56cfb37ab06a4e86db1c9e46074b328.pdf
Limax maximus
salivary gland
Thymol
histology
histochemistry
Ultrastructure
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-08
22
3
71
87
10.21608/ejabf.2018.8769
8769
Original Article
Potential role of rice cultivation and fish aquaculture in the transmission of schistosomiasis and the effect of pesticides and fertilizers used in rice cultivation on the snail Biomphalaria alexandrina and schistosome larval stages
El- Khayat, H. M. M.
1
Mahoudm, K. M. A.
2
Eissa, F. I.
3
Mostafa, M. A.
4
Flefel, H. E.
5
The present investigation aimed to study the potential role of rice cultivation and fish aquaculture in the transmission of schistosomiasis in Kafr El-Sheikh governorate. This study accomplished in four non-governmental rice fields; three non- governmental fish aquaculture and one governmental of each about one year. It was found that B. alexandrina established in all watercourses next to nongovernmental farms in the whole study, while B. truncatus was observed in certain watercourses next to non-governmental farms. The toxicity of six pesticides (lampada, sylian, saturn, karasay, mancozeb and machete and two fertilizers urea and mixed nitrate) which used in rice cultivation against B. alexandrina and their egg masses and schistosome miracidia and cercariae showed that all pesticides had strong molluscicidal properties and are far toxic than fertilizers. Lampada and karasay were the strongest pesticides against snails where their LC50 & LC90 were 0.8 & 1.0 and 0.7 & 1.1 ppm, respectively. Also, fertilizers LC50 & LC90 were 2754 & 4092 ppm for mixed nitrate and 9636 & 15937 ppm for urea. Effect of LC25 and LC50 of pesticides and fertilizers on mortality of B. alexandrina eggs explored that fertilizer mixed nitrate more potent effect on the eggs that killed 97.6% and 98.2%, respectively. Followed by Pesticides mancozeb and machete witch caused 94.7 & 95.9% and 94.2 and 97.9% mortality, respectively. The current data indicated that death rates of S.mansoni miracidia and cercariae were started after minutes of exposure to LC5 of both pesticides and fertilizers. It is concluded that accidental introduction of such pesticides to snails' habitats through plant pests control, low concentrations of the pesticide mancozeb and mixed nitrate inhibited the hatchability of B. alexandrina eggs, also suppressed vitality of S. mansoni larval stages within a short exposure period. As well; they disturb the compatibility of B. alexandrina snails to S. mansoni miracidia.
https://ejabf.journals.ekb.eg/article_8769_77e6036b3c099415d7bd0fc5d9889031.pdf
Schistosomiasis
B. alexandrina
B. truncatus
Rice cultivation
Aquaculture
Pesticides
fertilizers
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-08
22
3
89
98
10.21608/ejabf.2018.8770
8770
Original Article
Haematology and Biochemical Responses in Oreochromis niloticus exposed to sub-acute Doses of Aronil (Propanil) in a Flow through Bioassay
Yaji, A. J.
1
Iheanacho, S. C.
2
Ogueji, E. O.
3
Effects of sub-acute exposure of pesticide aronil (propanil) on haematology and serum biochemistry of Oreochromis niloticus juvenile was investigated in the present study. Sub-acute doses (0.21 mg/l, 0.43 mg/l and 0.83 mg/l) were derived from 1/20, 1/10 and 1/5 of the 96h LC50 (4.17 mg/l) of aronil, in which fish specimens were exposed for eight weeks. Control group was exposed to dechlorinated tap water. Haematology and serum biochemistry of fish were examined at week 2, 6 and 8 of aronil exposure. Significant and dose dependent decreases in red blood cell, haemoglobin and haematocrit were observed in aronil exposed fish compared to the control. White blood cell, mean cell haemoglobin and mean cell haemoglobin concentration of the control were significantly lower compared to the exposed fish groups. Neutrophil and lymphocyte percentages were elevated significantly in 0.83 mg/l exposed fish when compared to other exposed fish and the control at the eight week. Basophils, eosinophils and monocytes were not observed in aronil exposed fish. Significant and dose dependent increases in glucose, protein, aspartate aminotransferase, alanine aminotransferase and triglyceride were observed in aronil treated fish with reference to the control while insignificant changes in cholesterol level was observed in the exposed fish compared to the control. Aronil pesticide induced stress and had toxic effect on O. niloticus. Use of pesticide aronil should be regulated especially in farm lands along the coast and riversides to avoid the influx of pesticides into the aquatic ecosystems.
https://ejabf.journals.ekb.eg/article_8770_88d64d19ee02b225dc185e56af21ff77.pdf
Aronil
Propanil
Haematology
Serum Biochemistry
Oreochromis niloticus
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-10
22
3
99
110
10.21608/ejabf.2018.8934
8934
Original Article
Association pattern among different snails and other macroinvertebrate species at certain freshwater courses in Egypt
Kadria M. A. Mahmoud
1
Sara S. M. Sayed
2
The objective of the present work is to study the association among snail species, as well as between gastropods and other macroinvertebrates. The study was accomplished in three governorates; Giza, Damietta and Minya from spring (2009) till winter (2010). A total of 26 macroinvertebrates taxa representing 14 orders were recorded at 18 investigation sites, included Ephemeroptra, Plecoptera, Trichoptera, Diptera, Cleoptera, Odonata, Hemiptra, Gastropoda, Bivalva, Decapoda, Amphipoda, Oligochaeta, Arachnids and Hirudinea. The present data, revealed that the snails were the most dominant, comparing to other macroinvertebrates taxa in all stations of the study, which recorded 34.56% followed by shrimps (28.34%). Lanistes carinatus, Cleopatra bulimoides and Physa acuta were the most dominant snail species during the whole study. According to Diversity Index (H′) rank, the status of the present investigated sites ranged from poor to bad status. Moreover, Evenness Index (J) indicated that individuals at S5 (1.0), S4 and S17 (0.9) were distributed equally, while individuals at S3 (0.3), S10 (0.4) and S18 (0.41) were not. Biomphalaria alexandrina was the only species which maximally associated with leeches and this indicates its higher tolerance than other snails. All sensitive taxa (Ephemeroptra, Plecoptera and Trichoptera) were negatively correlated with Hirudinea. Meanwhile, Gastropoda was negatively correlated with Cleoptera, Hemiptra and Hirudinea. Lymnaea natalensis and Bulinus truncatus snails were found highly associated with damselflies and dragonflies, which reflect the sensitivity of these snails. Cluster analysis showed a similarity level between macroinvertebrates orders. This study concluded that most snail species were associated with moderately to somewhat pollutant tolerant macroinvertebrates, which reveals that the strength of this group in different mechanisms to tolerate pollution and other stresses.
https://ejabf.journals.ekb.eg/article_8934_52437833be473686f0c8189458f4a617.pdf
Macroinvertebrates
Gastropoda
association
Diversity Index
Evenness Index
Egypt
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-22
22
3
111
124
10.21608/ejabf.2018.9454
9454
Original Article
Ecological studies on macrobenthic invertebrates in four northern Khors of Lake Nasser (Egypt); Community Structure, Relative Abundance and Diversity.
Hoda M. A.Wahab
1
Isaac A. Iskaros
2
Mohamed R. Fishar
3
Nagla E. Mohamed
4
The community structure, abundance and diversity of macrobenthic invertebrates were studied in relation to major physical and chemical characteristics of water and sediment during 2015 in the four northern khors of Lake Nasser (EL-Ramla, Kalabsha, Rahma and Wadi-Abyad). Twenty six macrobenthic invertebrates species belonging to Insecta (15 species), Annelida (5 species), Mollusca (5 species) and Decapoda (1 species) were recorded. The study indicated that the western khors sectors (El-Ramla and Kalabsha) or lying nearby the main stream were higher in species richness and abundance than that of the eastern khors (Rahma and Wadi-Abyad).This may be attributed to their sandy loamy bottom nature that provided with patches of aquatic plants. At the littoral stations, the magnitude of the standing crop of macrobenthic invertebrates showed the highest counts and biomass during winter with an average of 3016 orgs./m2, weighting 9.9 g. fresh wt./m2. In autumn, the standing crop was with an average of 2662 orgs./m2, weighting 19.5 g. fresh wt./m2, when the water temperature fluctuated between18.9 & 25.2°C. On the other hand, the macrobenthic invertebrates at the offshore stations remained low throughout most of the year due to the shortage of suitable substrate. Pearson correlation coefficient showed that the aquatic insects, annelids and molluscs were categorized in relation to water temperature, organic matter and dissolved oxygen, respectively.
https://ejabf.journals.ekb.eg/article_9454_bd56a6bffcb07a9e51f9bee15cacd26f.pdf
Lake Nasser
Northern khors
water quality
Macrobenthos
Invertebrates
biodiversity
Abundance
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-22
22
3
125
138
10.21608/ejabf.2018.9455
9455
Original Article
Experimental Studies on the Reproduction of the Thin-Lipped Mullet, Liza ramada
Mostafa A. Mousa
1
Mansour G. Ibrahim
2
Mohamed F. Kora
3
Mostafa M. Ziada
4
Like females of many commercially important fishes, Liza ramada fail to complete ovarian development and do not undergo final maturation (FOM), ovulation or spawning when reared in captivity. The aim of the present work was to investigate the histological and physiological changes during the reproductive cycle of Liza ramada reared in freshwater fish ponds and during induction of spawning in saline water. In the present study, the levels of total thyroxine (T4), triiodothyronine (T3) and cortisol in the plasma of Liza ramada in a complete reproductive cycle were measured in correlation with the seasonal histological changes in gonads. During the reproductive cycle of females, serum triiodothyronine (T3), thyroxine (T4) and cortisol decreased during ovarian early-vitellogenesis and increased during mid-vitellogenesis to reach a peak for both T4 and cortisol. Then, these hormones declined to low levels during late-vitellogenesis. At the prespawning stage, all mentioned hormones re-increased to high levels and finally declined during induction of spawning. There was a decrease in serum levels of thyroid and cortisol hormones coincided with an increase in testicular activity of the fish. T3 and T4 increased duringtestis ripening to reach a peak during spawning, while cortisol reached a peak during ripe stage and decreased to low levels during spawning. In conclusion, the seasonal changes in thyroid hormones and cortisol concomitant with gonadal maturation and spawning of Liza ramada support role for these hormones in reproduction and stress response of this fish.
https://ejabf.journals.ekb.eg/article_9455_864c9e21e1c748adf392de485e713af8.pdf
Liza ramada
thin-lipped mullet
Reproduction
Hormone
Spawning
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-22
22
3
139
157
10.21608/ejabf.2018.9456
9456
Original Article
Seasonal Distribution of Epipelagic Copepods at the Different Habitats in the North-Western Red Sea, Egypt.
Hamdy A. Abo-Taleb
1
Samiha M. Gharib
2
The present study was conducted at the Egyptian North-Western part of the Red Sea through 2 cruises during winter and summer, 2017. Samples were collected at 12 stations represented four different habitats. This study aims to investigate the community structure, diversity and abundance of copepods in different habitats in relation to some environmental parameters. Salinity increased in shallow sheltered lagoon habitats causing especial environment during summer. A total of 67 species belonging to 35 genera and 23 families of four copepod groups in addition to immature stages were identified. Major differences were detected in copepod community structure and species diversity between both seasons and different habitats. The greatest number of species (55) was found in the open deep water habitat, while the lowest (24 species) was recorded in the seagrass one. Among the copepod groups, calanoids were the most abundant and inhabited all habitats, forming an average of 49.2% of the total adult copepods. Likewise, calanoid copepods were the most diverse group represented by 38 species. Regional means of copepod densities were high in the coral reef habitats (856 ind.m-3). In contrast, the abundance of copepods was low in the seagrass habitats (572 ind. m-3). Finally, the noticed variation in the copepod composition among different habitats reflects the impact of the ecosystem components on the structioning of the community composition.
https://ejabf.journals.ekb.eg/article_9456_1f9bf8710fef8d8572f5f7893610c71d.pdf
copepoda
Red Sea
Ecology
Coral reef
Lagoons
Seagrass
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-07-30
22
3
159
182
10.21608/ejabf.2018.9737
9737
Original Article
Biochemical and histological assessment of some heavy metals on Biomphalaria alexandrina snails and Oreochromis niloticus fish in Lake Burullus, Egypt.
Hanaa M. M. El-Khayat
1
Sohair Abd-Elkawy
2
Nouran A. Abou- Ouf
3
Mervat A. Ahmed
4
Wafaa A. Mohammed
5
https://ejabf.journals.ekb.eg/article_9737_9b1c4347271e1a7888701604d8c8ab50.pdf
Lake Burullus
Heavy metals
Biomphalaria alexandrina Oreochromis niloticus
biochemistry
histology
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2018-12-30
22
3
183
192
10.21608/ejabf.2018.23920
23920
Original Article
Growth performance and biochemical blood parameters of Nile tilapia, Oreochromis niloticus, and thinlip mullet, Liza ramada, fed a diet supplemented with lemon (Citrus aurantifolia) peel in a polyculture system
Mohamed Toutou
mtoutou50@yahoo.com
1
Ali A. Soliman
2
Mohamed A. Elokaby
3
Ragaa A. Ahmed
4
Baghdady E. S
5
Fish Nutrition Laboratory, Aquaculture Division, National Institute of Oceanography and Fisheries, Alexandria, Egypt
Fish Nutrition Laboratory, Aquaculture Division, National Institute of Oceanography and Fisheries (NIOF), Egypt.
Fish Rearing Laboratory, Aquaculture Division, (NIOF), Egypt.
Department of Aquaculture, Faculty of Fish & Fisheries Technology, Aswan University
Department of Aquaculture, Faculty of Fish & Fisheries Technology, Aswan University
The objective of the current study was to evaluate the growth performance, survival, feed utilization, whole body composition and biochemical blood parameters of Nile tilapia, Oreochromis niloticus and thinlip mullet, Liza ramada, fed diets supplemented with four levels of lemon peel (0, 0.5, 1 and 2%) in a polyculture system. The fish were stocked in 2×5×1 m concrete tanks at a density of 40 Nile tilapia (0.6 g) and 10 thinlip mullet (3.3 g) fingerlings per tank and were fed a pelleted diet (~25% Crude protein), twice daily for 77 days. Treatment with 2% lemon peel had significant positive effects on growth, feed utilization and total biomass of Nile tilapia, whereas 0.5% lemon peel was optimal for thinlip mullet. The blood parameter results showed thatNile tilapia fed 2% dietary lemon peel had the lowest triglyceride, amylase and glucose levels. In contrast, thinlip mullet fed 0.5% dietary lemon peel had the highest levels of amylase and glucose compared with the other groups.
https://ejabf.journals.ekb.eg/article_23920_abe63c9e3053c4a69cf7e12745a07ea9.pdf
Liza ramada
Thinlip mullet
Oreochromis niloticus
Nile tilapia
Citrus aurantifolia
Growth performance