eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2011-01-01
15
1
1
13
10.21608/ejabf.2011.2072
2072
Original Article
Histopathology of farmed freshwater fish infested with different helminthes
Amina El-Mansy
1
National Institute of Oceanography & Fisheries, Egypt
In this study, histopathology of tissues of different cultured fishes (Cyprinus carpio, Clarias gariepinus, Oreochromis aureus, Sarotherodon galilaeus and Tilapia zillii) due to different helminthes had been investigated. Obviously, thedirect effect of helminth parasites mainly depend on their attachment organs.Herein, helminthes belong to monogenean, digenean, cestode, nematode and acanthocephalan parasites, were identified as Cichlidogyrus halli typicus,Dactylogyrus afrobarbae, Orientocreadium batrachoides, Polyonchobothrium clarias, Paracamallanus cyathopharynx, Procamallanus laevichonchus and Acanthosentis tilapiae respectively. Severe damage occurred to the gill tissuedue to the monogeneans opithohaptor. Limited lesions to the infected tissue of the fish host due to the nematodes were induced at the attachment site by the parasite buccal capsule. Deep penetration of intestinal tissue of the fish infestedwith the cestode Polyonchobothrium clarias was occurred due to the parasitic scolex. The digenean Orientocreadium batrachoides induced damage by its sucker at the attachment site to the infected epithelia of the host tissue as well.The acanthocephalan parasite Acanthosentis tilapiae caused severe rupture of the infected tissue by its proboscis hooks at the attachment site. Moreover, it may lead to complete decompose to intestinal tissue of the host. It is worthy toconclude that, in cases of the intense infestation negative impact of the parasite become more dangerous.
https://ejabf.journals.ekb.eg/article_2072_461f1f03d470a744808d0da76f3b1551.pdf
helminth parasites
histopathological lesions
Cultured Fishes
El-Serow Experimental Fish Farm
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
2011-01-01
15
1
15
28
10.21608/ejabf.2011.2073
2073
Original Article
Effect of chronic exposure to sublethal of ammonia concentrations on NADP+-dependent dehydrogenases of Nile tilapia liver
Mona Hegazi
1
Department of Zoology, Faculty of Science,Tanta University, Tanta, Egypt
The effect of chronic exposure to sublethal ammonia (NH3) on liver NADPH producing enzymes of Nile tilapia juveniles (Oreochromis niloticus) was studied. Fish with an initial weight of 15.0±1.4 g were reared in a static systemand exposed to the total ammonia nitrogen (TAN) concentrations 5 or 10 mg L−1 for consecutive 70 days at 26±0.5°C.NADPH is mainly produced by glucose 6-phosphate dehydrogenase (G6PDH), 6- phosphogluconate dehydrogenase (6PGDH), and the cytosolic form of NADP-dependent isocitrate dehydrogenase (IDH). These enzymes havebeen recently considered as an important factor in cellular defense against oxidative damage as they share in maintaining reduced glutathione (GSH) level.The activity of the enzymes G6PDH, 6PGDH, and cytosolic IDH in liver tissuesof fish exposed to different concentrations of NH3 showed significant increase. The degree of increase in activity was positively related to ammonia concentration. The increased activity of these enzymes resulted in higher NADPH availability. This may be interpreted as a defense to maintain a high level of GSH against the expected oxidative stress in ammonia-exposed fish.
https://ejabf.journals.ekb.eg/article_2073_d652f578d4a7c0f5ea3b08be33735010.pdf
NADPH
glucose 6-phosphate dehydrogenase
6- phosphogluconate dehydrogenase
cytosolic form of NADP-dependent isocitrate dehydrogenase
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2011-01-01
15
1
29
42
10.21608/ejabf.2011.2075
2075
Original Article
Red sea crustacia and gastropod shells of ras sudr region (northeast of the Gulf of Suez), Egypt
Salwa Hamdi
1
Department of Zoology, Faculty of Science, Cairo University, Egypt
One crustacean shell from cirripedia, and 24 gastropod shells related to 13 different families are collected and described from Ras Sudr region (northeast Gulf of Suez), Egypt. These include one species from vermetidae,three species from Trochidae, one species from Turbinidae, one species from Neritidae, one species from Turritellidae, five species from Cerithiidae, three species from Strombidae, one species from Fasciolariidae, one species fromMelongenidae, four species from Muricidae, two species from Cypraeidae and one species from Naticidae.
https://ejabf.journals.ekb.eg/article_2075_dd71dfb7249f132a6ac05414eba27b40.pdf
Red Sea
Crustacea
Gastropoda
Shells
Ras Sudr
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
2011-01-01
15
1
43
56
10.21608/ejabf.2011.2077
2077
Original Article
Population dynamic and fisheries management of Eeuropen sea bass,Dicentrarchus labrax (f. Moronidae) from Bardawil lagoon, North Sinai, Egypt
Mohamed Ahmed
1
Faculty of Environmental Agricultural Sciences, Suez Canal University, Egypt.
Population dynamic of European seabass, Dicentrarchus labrax was studied from a small scale fishery of Bardawil lagoon. 1688 specimens ranged between 18.2 and 64.7 cm TL and 62 to 2823 g total weight, were collected fromAugust, 2009 to November, 2010. The relationship between length and weight was estimated as W = 0.014 L2.883. Age was determined using scales’ reading technique for 586 individuals and the longevity of this species was found to be 6years. Growth in length and weight at the end of each year was calculated. The growth parameters of the von Bertalanffy equation were calculated as L∞ = 70.82 cm, K = 0.35 yr-1 and t0 = -0.217 yr. The observed and predicted extreme lengths were 64.5 and 70.05 cm, respectively. Total, natural and fishing mortality rates were 1.03 yr−1, 0.39 yr−1 and 0.64 yr−1, respectively. The current exploitation rate (E = 0.6229) indicated that the stock of seabass in Bardawil lagoon is heavily exploited. The length at first capture Lc was estimated as 20.16 cm. The maximum allowable limit of exploitation (Emax) was 0.5, while that at maximum economic yield was 0.42. Based on these results, this important species may be in danger of severe declines in the near future where the stock was over-fishedand small fish were unprotected by the current size regulation. Also, the results indicated that an increase of Lc would be associated with an increase in yields at the existing exploitation rate. Thus, for management purpose, the currentexploitation rate must be reduced from 0.62 to 0.31 (50%) or the present length at first capture (Lc) should be increased from 20.16 to 32 cm at the current the exploitation rate.
https://ejabf.journals.ekb.eg/article_2077_b0544257e49e398a9622340be57ac741.pdf
Population Biology
Fisheries regulation
Dicentrarchus labrax
Bardawil Lagoon
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
2011-01-01
15
1
57
69
10.21608/ejabf.2011.2078
2078
Original Article
Population dynamics and fisheries management of Gilthead sea bream, Sparus aurata (f. Sparidae) from Bardawil lagoon, North Sinai, Egypt
Mohamed Ahmed
1
Faculty of Environmental Agricultural Sciences, Suez Canal University, Egypt
opulation dynamics of Gilthead sea bream, Sparus aurata was studied from a small scale fishery of Bardawil lagoon. 3262 specimens ranged between 11 and 32.9 cm TL and 20 to 592 g total weight, were collected from April,2009 to November, 2010. The relationship between length and weight was estimated as W = 0.025 L2.813. Age was determined using scales’ reading technique for 865 individuals and the longevity of this species was found to be 4years. Growth in length and weight at the end of each year was estimated. The growth parameters of the von Bertalanffy equation were calculated as L∞ = 36 cm, K = 0.39 yr-1 and t0 = -1.68 yr. Total, natural and fishing mortality rateswere 1.02 yr−1, 0.21 yr−1 and 0.81 yr−1, respectively. The current exploitation rate (E = 0.79) indicates that the stock of seabrea in Bardawil lagoon was heavily exploited. The length at first capture Lc was estimated as 15.54 cm. The length at first maturity Lm of males and females were estimated as 20.5 and 22.8,respectively. The maximum allowable limit of exploitation (Emax) was 0.61 while that at maximum economic yield (E0.1) was 0.499 and maintains 50% ofstock (E0.5 = 0.37). The raised Lc to the first sexual maturity (22.5 cm as Lt) would be associated with an increase of Y′/R by 15 % from the current Y′/R at exploitation rates equal Emax= 0.74. Also, raised Lc to 24.5 cm at currentexploitation rate Emax=0.79. The results indicate that, for proper management of sea bream catch on Bardawil lagoon, the effort should be reduced or the length at first capture should be raised.
https://ejabf.journals.ekb.eg/article_2078_e71adf6b92fd1b108b312e36801e988b.pdf
Population Biology
Fisheries regulation
Sparus aurata
Bardawil Lagoon
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
2011-01-01
15
1
71
87
10.21608/ejabf.2011.2079
2079
Original Article
Dietary protein requirements for juvenile sole Solea aegyptiaca (Chabanaud, 1927)
Abdel moneim Yones
1
Nabil Hakim
2
National Institute of Oceanography & Fisheries, Shakshouk Fish Research
Department of animal production, Faculty of Agriculture, Al-Azhar University
The present study was conducted to determine the dietary protein requirement for optimal growth performance and body composition of juvenile sole fish. Four diets were formulated with different protein levels (D40, D45, D50 andD55% crude protein). The silverside fish (Atherina boyeri) was added to the diets as local animal protein source and to enhance palatability of the test diets. Fish were fed the artificial diets as 2% of the fish biomass daily divided into twoequal portions. Juvenile sole with an initial weight of (6.65±0.2g) were distributed as 40 juveniles in each triplicate tank, each of 1m3 volume. The experimental period lasted 120 days after start. The results showed significantdifferences (P<0.05) in growth performance and feed efficiency between diets.The highest performances in terms of (Finial weight, Weight gain, Average daily gain, Specific growth rate, Condition factor, Feed conversion ratio, Protein efficiency ratio, Protein productive value and Hepatosomatic index) wereobtained with the D55% CP, followed by D50%, without significance difference between them. However, fish fed D40% crude protein diet recorded less performance parameters. No significance difference (P<0.05) in whole bodychemical composition (dry matter, crude protein, crude lipid and ash) were found between fish fed all experimental diets. However, slight increase in whole body lipid contents were recorded with D50%CP and D55%CP levels. Theresults of the present study indicated that, D55% crude protein level can be optimal for meeting the requirement of juvenile sole, Solea aegyptiaca without adverse effects on growth performance and feed efficiency.
https://ejabf.journals.ekb.eg/article_2079_7d122251ccec17d11f1b5544ec3224ef.pdf
Solea aegyptiaca
silverside
protein requirement
Stomach content
Growth
performance
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2011-01-01
15
1
89
104
10.21608/ejabf.2011.2080
2080
Original Article
Rearing of the Nile tilapia (Oreochromis niloticus) on diets containing cotton seed meal enriched with vitamin E
Magdy Soltan
magdyasoltan@yahoo.com
1
Abdel-Nasser Saudy
2
Ahmed Fath El-Bab
3
Faculty of Agriculture, Moshtohor, Banha University, Egypt.
National Organization for Drug Control and Research, Egypt
Central Laboratory for Aquaculture Research - Abbassa, Sharkyia governorate
The present experiment was conducted to evaluate the effect of α-tocopherol as an antioxidant for avoiding the side effects of incorporation of cottonseed meal (CSM) in the diet of the Nile tilapia as a replacer of fish meal (FM). Twodiets were prepared; the first one contained fish meal and was considered as a control, in the second diet, FM was completely replaced by CSM. The second diet was divided into ten parts, the first one is a control and the other 9 diets were enriched with increased levels of vitamin E (1, 5, 10, 15, 20, 25, 30, 35 and 40 times of gossypol in CSM). Each diet was offered in three aquaria (3 replicates for each diet) and each aquarium was stocked with 25 fish (2.0-2.1g). Results are summarized in the following:- The highest average body weight (9.91 g) was recorded for the control group fed on thebasal diet (contained FM) and the lowest BW (5.66 g) was obtained for fish fed the dietD2 in which FM was completely replaced by CSM without vitamin E. Incorporation ofvitamin E in the experimental diet significantly improved the BW. Similar trend wasobserved for the other growth performance parameters body length (BL), weight gain(WG) and specific growth rate (SGR).- The best feed conversion ratio (FCR) was recorded for fish group fed on the diets D1and D3 which significantly differed from values recorded for the other treatments. Theworst FCR was recorded in fish group fed on the diet D2 in which FM was completelyreplaced by CSM without addition of vitamin E. Incorporation of vitamin E in theexperimental diets improved FCR specially fish group fed on the diet D3.- Protein content of the whole fish body ranged between 41.33 to 50.97% and thedifferences were significant. Fat content of fish fed the diet D2 significantly higherthan those obtained for fish fed the other groups. Compared to the two control dietsD1 and D2 all vitamin levels in the experimental diets increased ash content of thefish whole body and the graded levels of vitamin E in the diets significantly alteredthe ash content of tilapia fish.- The highest values for hematocrite (Ht) and haemoglobin (Hb) were obtained forfish fed on the control diet (D1). Incorporation of vitamin E in the experimentaldiets at increasing levels significantly affected Hb and Ht. Compared to thecontrol group (Diet1) aspartate transaminase (AST) and alanine transaminase(ALT) levels significantly increased fish groups fed on the other experimentaldiets.
https://ejabf.journals.ekb.eg/article_2080_a823fe162350f5122d09b7fe8e4f50f8.pdf
Nile tilapia
diet
Cotton seed
Vitamin E
growth rate
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2011-01-01
15
1
105
124
10.21608/ejabf.2011.2081
2081
Original Article
The viability of probiotics as a factor influencing the immune response in the Nile tilapia, Oreochromis niloticus
Magda El-Ezabi
1
Sabry El- Serafy
2
Mohamed Essa
3
Said Daboor
4
Neven Esmael
5
Zoology Department, Faculty of science, Benha University
Zoology Department, Faculty of science, Benha University
National, Institute of Oceanography and Fisheries, Cairo, Egypt
Process Engineering and Applied Science, Dalhousie University, Halifax, Nova Scotia, Canada
- National, Institute of Oceanography and Fisheries, Cairo, Egypt, ,- Institute of Marine Biosciences, National Research Council of Canada, Halifax, Nova Scotia, Canada
The present investigation was conducted to study the effect of dietary supplementation of the probiotics Bacillus subtilis, Lactobucillus plantarum, a mixture of both bacterial isolates (B.subtilis and L. plantarum) and the yeast, Sacchromyces cerevisiae on the immune response of the Nile tilapia, Oreochromis niloticus. Two experimental diets were conducted. In the first experiment O. niloticus ( 24.55±0.03g) were fed for 60 days on four experimental diets supplemented with B. subtilis (107 CFU/g ) (D1), L. plantarum (107 CFU/g) (D2) a mixture of B. subtilis and L. plantarum (D3) andthe yeast Sacchromyces cerevisiae (D4) and a control non-supplemented diet. All of the four experimental diets showed significantly increased phagocytic activity, acid phosphatase activity, lysozyme activity and total immunoglobulinactivity in blood samples of the fish as compared with the control nonsupplemented diet. In the second experiment, O. niloticus (35.05±0.01g) were fed on a diet supplemented with three concentrations of L. plantarum (105, 107and 109 CFU/g) (D1, D2 and D3) respectively for 60 days. The probiotic treatment increased significantly the phagocytic activity for fish fed D2, while acid phosphatase activity was significantly increased for fish fed D3. Diets (D2and D3) showed significantly the highest levels of lysozyme activity. No significant differences between the three diets for phenoloxidase activity, while total immunoglobulin showed significantly increased levels for fish fed D1 andD3 respectively. The results of the present study support the use of probiotics as immunostimulants in common fish diets.
https://ejabf.journals.ekb.eg/article_2081_029d437a8535281478c034dc1e0a6de2.pdf
Nile tilapia
Oreochromis niloticus
immunity
probiotics
fish diet
eng
The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)
Egyptian Journal of Aquatic Biology and Fisheries
1110-6131
2536-9814
2011-01-01
15
1
125
141
10.21608/ejabf.2011.2082
2082
Original Article
Effects of varying levels of fish oil on growth performance, body composition and haematological characteristics of Nile tilapia Oreochromis niloticus (L).
Midhat El –Kasheif
1
Amal Saad
2
Seham Ibrahim
3
National Institute of Oceanography and Fisheries, Cairo
National Institute of Oceanography and Fisheries, Cairo
Faculty of Science, Benha University, Benha – Egypt
Oaquaria at a density of 15 fish / aquarium for a period of 16 weeks. Four artificial diets with control diet containing (0%), 3%, 6% and 9% supplemented fish oil were used in the present study, to investigate their effects on growth,body composition and haematological properties of Nile tilapia. Results revealed that the best growth (54.4g/fish) was obtained with the 9% supplementary lipid followed by the diets containing 3% fish oil (48.7 g/fish), control diet (47.3g/fish) and 6% (41.1 g/fish) supplemented fish oil.Furthermore, the highest percentage of weight gain (28.7%) and the highest specific growth rate (0.78%) were obtained with the 9% supplemented fish oil. Biochemical analysis of whole fish bodies indicated that moisture, ashand protein contents were unaffected by the lipid levels in the diet, lipid content was increased with the increased lipid level. Results of the present study show that serum cholesterol and glucose levels as well as haemoglobin content wereaffected significantly with the lipid levels. Total serum protein (TSP), total serum albumin (TSA) and total serum globulin (TSG) studied show that the (TSP) and (TSG) were not significantly (p > 0.05) affected by lipid levels, whilethe (TSA) was significantly (p< 0.05) affected by lipid levels. Also results revealed that R.B.Cs, W.B.Cs counts, Hb and haematocrit (P.C.V) were not significantly affected by lipid levels among all treatments. Results of theexperiment show that protein, glucose and cholesterol for fish fed diet containing the highest supplemented lipid (9%) level were significantly different (p< 0.05). Based on the obtained results, it could be concluded that an artificialfeed with 3% and 9% supplemented fish oil is sufficient for feeding O.niloticus without any adverse effects on growth performance, body composition and haematological properties.
https://ejabf.journals.ekb.eg/article_2082_f2180df35bb65f057675a9d320cf40e5.pdf
Lipid
Growth
body composition
Haematology
O. 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
2011-01-01
15
1
1
9
10.21608/ejabf.2011.2083
2083
Original Article
الأنسجه المرضيه لبعض أسماک المياه العذبه المستزرعه والمصابه بديدان طفيليه مختلفه
https://ejabf.journals.ekb.eg/article_2083_b97fed2aa6e405fdf50ebccb27e999be.pdf