2024-03-29T12:00:53Z
https://ejabf.journals.ekb.eg/?_action=export&rf=summon&issue=444
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2013
17
3
A survey study on ashtoum El-Gamil park's water concerning phytoplankton populations
Mohamed
Abd El-Karim
Abdelhamid
Abdelhamid
Eldeweny
Mabrouk
Manal
Barbary
Among the 19 water samples collected year round during (2010 – 2011) fromAshtoum El-Gamil Park, 12 samples succeeded to cluster above similarity level of60%. The samples of similarity less than 60% were mainly sampled during summer.Total phytoplankton diversity marginally changed between lake stations. The highestdiversity of 3.1 was found at station No. 4 in winter where a minimum diversity of1.14 was found at station No. 1 in spring. The dominant classes in Lake Manzala(Ashtoum El-Gamil Park) were chlorophytes, diatoms and cyanoprokaryotes. Thethree groups altogether constitute more than 95% and 85% of the total phytoplanktonabundance and total number of taxa, respectively. Based on cell number, thechlorophytes ranked the first position of dominance with relative abundance of84.23% and they exclusively dominated the phytoplankton communities year round.Regarding the species composition, chlorophytes dominated the phytoplanktonspecies composition with percentage occurrence of 44% to the total number ofrecorded species. The phytoplankton abundance showed major peaks during spring atdifferent stations except at station No. 2 where the highest abundance of 28716 cells x105 l-1 was found, whereas the minor peaks were irregularly distributed between otherseasons with the least abundance of 704 cells x 105 l-1 which was detected duringwinter at station No. 4. Generall, the total number of taxa per site showed no obviouspattern of variation. It is concluded that presence and biodiversity of phytoplanktonare affected by locations and seasons, and the pollution is under the critical levels.
Chlorophyceae – Cyanophyceae – Bacillariophyceae – Dinophyceae
Euglenophyceae-Cryptophyceae – Prasinophyceae
Ashtoum El-Gamil
2013
07
01
1
9
https://ejabf.journals.ekb.eg/article_2172_048dcd4853e16111c567b8fdfcd53fbf.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2013
17
3
Bacteriological status of ashtoum El-Gamil protected area
Abdelhamid
Abdelhamid1
Manal
El-Barbary
El-Deweny
Mabrouk
Survey study was carried out throughout four seasons from four locationsrepresenting the whole protected area "Ashtoum El-Gamil", Port Said governorate,Manzala Lake concerning the bacterial load in water and fish of this park. Thebacterial load in water samples increased by increasing water temperature, the rangeof total count of bacteria was 0.6×106 to 0.2×108 /100 ml of water sample in winterand summer respectively. The following bacterial genera were isolated from watersamples: Aeromonas, Bacillus, Proteus, Pseudomonas, Streptococcus, S. epidermidis,S. aureus, Micrococcus, Vibrio and E. coli. The predominant microorganisms isolatedfrom water were E. coli, Bacillus spp., Vibrio spp. and Pseudomonas spp. While thetotal bacterial counts (TBCs) from fish samples obtained on NA media were higher insummer season in all tested organs than other seasons (spring, winter and autumn);also, the high bacterial load was observed in both of gills and intestine comparingwith the liver. TBCs were 0.8×107, 0.52×107 and 0.13×107 cfu / g in gills, intestineand liver, respectively in location No. 3 (bahr kassab) during the summer. The highestTBCs obtained on McCA, MSA, and BHA media were 0.16×107, 0.25×107, and0.3×107 cfu / g of gills in locations No. 1, 1 and 3 during summer, autumn andsummer, respectively. The bacterial species isolated also from fish were namely V.cholerae, V. parahaemolyticus, Aeromonas spp., E. coli, Yersinia spp., Proteus,Pseudomonas spp., Micrococcus spp., S. epidermidis, S. aureus and Streptococcusspp. In the pathogenicity test, the most pathogenic bacteria for tilapia fish werePseudomonas spp., V. cholerae and Aeromonas spp which causing greater than 70,60% and 60% mortality within 96 hr respectively.
Ashtoum El-Gamil
water – fish – bacteria
2013
07
01
11
23
https://ejabf.journals.ekb.eg/article_2173_f5a94a0d42c15cbb9544f8646ef219e9.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2013
17
3
Age, growth and reproduction of the lizard fish Saurida undosquamis from the Gulf of Suez, Red Sea, Egypt
Salah
El-Etreby
Mahmoud
Saber
Azza
El-Ganainy
Al-Azab
El-bokhty
The lizard fish Saurida undosquamis represents one of the most commercial fishin the Gulf of Suez. The growth and reproductive biology of the species were studied.The age was determined from otolith readings of the collected specimens from theAttaka Harbor through the period from September 2011 to April 2012. The resultsshow that the life span of the sampled fish was seven years. The estimated vonBertalanffy growth equation was Lt=51.252 (1-e-0.131(t+1.45)), the calculated lengthweightrelationship was W= 0.004 L3.107. Seasonally distribution of gonado-somaticindex (GSI) values showed that the main peak of GSI was in spring. The results ofgonad development stages show that, Saurida undosquamis is a synchronous spawner.The size at which 50% of fishes are mature was 15.0 cm for males and 15.5 cm forfemales, which indicates that all individuals over one year of age were sexuallymature. The results indicated that juvenile individuals are one of the targets of thefishery and the protection of the juveniles is probably the key factor for thesustainability of the resources.
Age
Growth
Reproduction
Saurida undosquamis
Gulf Suez
Red Sea
2013
07
01
25
34
https://ejabf.journals.ekb.eg/article_2174_b3bd38be8abf281c9b7010d95f3c7e4d.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2013
17
3
Effect of four different commercial diets on growth perfomance of the cichlid fish, Oreochromis niloticus fingerlings
Hassan
Khalaf Allah
Mohamed
Abu-Zaid
Mohamed
Abdel-Ghany
The present study deals with the effect of four commercially prepared diets on the length-weight relationship, condition factors, growth performance and feed utilization of the cichlid fish, Oreochromis niloticus fingerling reared in glass aquaria. The major components of diets included proteins, fats and carbohydrates of each feed type. The diets were analyzed for verification of values written on its commercial label. Data showed that, the standard length of the fish fed on the different diets did not vary significantly where it ranges between 6.28 ± 0.9 cm in diet II to 6.66 ± 0.8cm in diet I. The same pattern of change was also noticed in comparing the weight of fishes fed on the four diets. Data indicated that, fish feeding on diet IV demonstrate the lowest weight being on the average of 8.86 ± 1.97 gm, while, fish feeding on diet I showed the highest weight being averaged 10.37 ± 3.2 gm. The growth of fish is nearly isometric in the first three diets and negative allometric in the fourth one. The values of condition factors are slightly differences among different diets. The highest value (3.46) of coefficient of condition (k) was recorded in the fish fed on diet II andthe lowest value (3.09) in the fish fed on diet III. The highest average value (1.07) of the relative condition factor (kn) and the lowest (0.90) were recorded in the fish fed on diet III. The lowest value of total weight gain, average daily gain and specific growth rate were detected in the fish fed on diet IV. The value of feed intake of diet Iis better than the values obtained from the other feed diets. The best feed conversion ratio (1.87) was recorded in the fish fed on diet II. The lower protein efficiency ratio (0.25) was recorded with diet IV and the higher protein efficiency ratio (0.53) was recorded with diet II.
Dietary composition
Growth performance
Oreochromis niloticus
2013
07
01
35
46
https://ejabf.journals.ekb.eg/article_2175_761da7469d23af690909e99db6df5562.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2013
17
3
The impact of agricultural drains on water quality and Phyto- zooplankton communities in fish farms, Egypt.
Abd El-Halim
Saad
Ahmed
Abd El-Gawad
Niema
Ali
Nadia
Bassuny
This study was carried out on two fish farms in Kafr El-Sheikh and Sharkia governorates during 2011. The water supply sources of these farms were El-Gharbia and El-Wady drains respectively. The mean values of physico-chemical parameters of water in El-khashaa and Abbassa fish farms were: water temperature (24.66 and 24.95 oC); pH (9.23 and 8.67); transparency (12.12 and 15.24 cm); DO (5.36 and 6.3 mg/l ); total alkalinity (330.9 and 340.3 mg/l) and total hardness (689.5 and 260.0 mg/l), respectively. The major nutrient concentrations (N & P) at the main feederwere much higher than the corresponding values at fish farms. Nitrogen concentrations analysis indicated the highest values of NH3-N over NO3-N in the selected fish ponds (1.94 and 1.22 mg/l respectively). Phytoplankton in the presentstudy were represented by four groups; Chlorophyceae, Cyanophyceae,Bacillariophyceae and Euglenophyceae, where Chlorophyceae dominated other groups. Zooplankton were represented by four groups; Rotifera, Copepoda, Ostracodaand Cladocera. Rotifera and Cladocera were the dominant groups. Results indicated that the drainage water affects physical, chemical and biological characteristics of fish farms
El-Gharbia drain
El-Wady drain
phytoplankton
Zooplankton
fish farms physical and chemical parameters
2013
07
01
47
56
https://ejabf.journals.ekb.eg/article_2176_52fdb5b40de06050e9aee38e4cb8bd32.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2013
17
3
The seaweed (green macroalgae), Ulva sp. as bioindicator of metal pollution in the Mediterranean Coast, Alexandria region, Egypt
Samir
Saeed
Yasser
Moustafa
Changes in heavy metals (Fe, Mn, Zn, Cu, Cd and Pb) concentrations in marine seaweed (green alga) Ulva sp. and seawater collected from the the Mediterranean Coast, Alexandria region, Egypt were investigated during monthly samplings from January to December 2012 to assess the spatial and seasonal variation of these elements as well as the pollutional status at this area. Fe had the highest concentration and Cd found the lowest one. There were statistically positive significant correlations among the levels of some metals in the macroalgae. The mean metals concentration inthe Ulva tissue decreased in the order: Fe>Mn>Zn>Cu>Pb>Cd. Only, concentrations, Fe, Zn and Pb, in water showed significant (P<0.05) seasonal changes. Fe, Mn, Zn and Cu showed the greater spatial and temporal differences (P<0.05) in macroalgae tissues. The results showed that the studied area not faced heavy metals pollution. It isalso concluded that Ulva sp. play an important role as a bioindicator for heavy metals contamination in seawater.
seaweed
Ulva sp
Heavy metals
Mediterranean coast
2013
07
01
57
68
https://ejabf.journals.ekb.eg/article_2177_90b0cc0652c56599c787004bf8cd266a.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2013
17
3
Changes in the intestinal bacterial profile and serum biochemical parameters of Nile Catfish Clarias lazera after feeding with probiotic.
Esam
Rizkalla
Hala
Habashi
Ahmed
Ali
In this study, the experimental set-up was based on fed Clarias lazera commercial diet with probiotic for 45 days either 1 time/week (W1) all over the experiment or 3 times/week for the 1st two weeks then 1 time/week till the end of theexperiment (W3). Bacteriological and biochemical examinations were done on intestinal tract and serum respectively.Bacteriological investigation revealed the presence of Escherichia coli and Klebsiella spp. in all groups and Pseudomonas aeruginosa failed to be isolated from W1 and W3. Bacterial isolates proved to be pathogenic for mice, positive for Congored binding activity and toxigenic in infant mice. The intestinal total aerobic bacterial count; Enterobactereacae count and coliform count in males and females of both W1 and W3 fish groups were significantly lower than the respective values in control group. Significant low values were detected in W3 group compared to W1 group.Significant sex differences in the three counts were detected in the three groups of fish except the Enterobactereacae count in W3 group. Concentrations of serum ammonia and urea were significantly decreased in both treated groups compared to the control group. Both serum items were significantly lower in W3 group than that in W1 group. Significant sex difference was recorded in serum creatinine of the three groups (females lower than males).The activities of serum alkaline phosphatase; alanine aminotransferase and aspartate aminotransferase enzymes significantly differed according to sex with a general trend that these enzymes were significantly higher in W3 group than that ofW1 group.Serum total protein, albumin, globulin and A/G ratio in fish of W1 group weremore affected by probiotic administration than that in W3 group. These serum protein items in all groups were significantly affected by sex. Serum IgM level in both sexes of W1 group was significantly higher than that in both control and W3 groups.A correlation analysis was conducted to determine the strength of the association between serum biochemical parameters and viable total bacterial count;Enterobactereacae and coliform counts in the guts of fish. Male fish showedsimilarity of the correlations analysis between the three bacterial counts and thedifferent serum biochemical parameters, while female fish detected some variationsaccording to the type of bacterial count.
bacterial profile
serum biochemical
Clarias lazera
probiotics
2013
07
01
69
87
https://ejabf.journals.ekb.eg/article_2178_edfb23fba90d3f7cc981ead20b5702bb.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2013
17
3
Some ecological aspects of the land hermit crab Coenobita scaevola (Coenobitidae) at Wadi El-Gemal protected area, Red Sea
Abd Al-Kader
Hassan
Mohamed
Abu-Zaid
Besar
H
Hanafy
MH
Gastropod shells can be a limiting factor in allowing hermit crab populations toincrease. The impact of this factor on population size of the land crab Coenobita scaevola(Forskäl, 1775) was examined. Extensive and intensive works were conducted on a sandybeach of Wadi El-Gemal island and the protected area coast (35°04’0”E, 24°42’0”N).Activity, spatial and temporal distribution, food foraging, and impact of human tourismactivities for this hermit crab were discussed. A total of 365 crab individuals were collectedfrom the sandy beach of Wadi El-Gemal island during August 2007 to July 2008, amongthese 137 were used for frequency measurements of occupied shells by the land hermit crabs.The hermit crabs were found occupying seventeen species of gastropod shells. A significantregression and correlation were recorded between the shell aperture and chelae. However, ourdata showing no significant regression values between total body weight of crabs and foreach of the shell weight and internal volume. From the other angle, the correlationrelationship recorded high significant value for the same relationships. This may reflect thatsome smaller crabs tend to occupy larger shells than the preferred ones. Moreover, the shellspecies occupation as a function of chelar hermit crabs size. While the negative resultsbetween body weight of crab and both shell internal volume and weight it may be due to thevariations behavior of some land hermit crab individuals within population. It is logical thatfit the size of chelae with aperture of shell to achieve protection from predators while somemembers of the population that occupied shell is greater than the size of his body to theunavailability of appropriate shells.
Coenobitidae
population
shell occupation
Wadi El-Gemal Island
Protected Area
Red Sea Coast
2013
07
01
89
106
https://ejabf.journals.ekb.eg/article_2179_9976a6aaf1ff9b7247da013419d092dd.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2013
17
3
Study on toxicity of Oreochromis niloticus with aflatoxinB1
Sherif
H.
Abdel-Maksoud
A.
Shukry
M.
The purpose of this study was to determine the effect of aflatoxin B1 (AFB1) on immunity and hematological profile, RBC, WBC, Hb, serum protein, albumin-A, globulin-G, A/G ratio, phygocytic activity, nitro blue tetrazolium reduction andchallenge test against Aeromonas hydrophilla of apparently healthy 150 Nile tilapia Oreochromis niloticus weighed 23.42±1.2 gram. After 84 days of exposure to AFB1 100 and 20 μg/kg fish samples were collected then O. niloticus were treated with biological antitoxin for 3 days then samples were taken after stoppage the treatmentby 7 days. Immune activities and hematological profile were significantly (P ≤ 0.05) influenced in dose and duration of exposure dependent manner this was reflected in the health and growth performance of O. niloticus. Results indicated that improvements had achieved by lowering the AFB1 compained with biological treatment
Aflatoxin B1
Oreochromis niloticus
immunity
Blood
liver enzyme
2013
07
01
107
119
https://ejabf.journals.ekb.eg/article_2180_9274d6b775926d03353a1fa0b0acc3bc.pdf