The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613113120090101Effect of Cadmium treatment on the level of Alanine Aminotransferase (A LT) in gills and muscles of Oreochromis nilaticus collected from Wadi Hanifa Stream Riyadh, Saudi Arabia15201910.21608/ejabf.2009.2019ENIbrahim Al-SuwitiDepartment of Zoology, College of Science, King Saud UniversityJournal Article20170403The activity of aminotransferase (ALT) in the gills and muscles of O.niloticus after exposure to sublethal concentration of cadmium for about 18days was measured. The treated fish showed high levels of ALT activety in their<br />gills and muscles compared with those of control ones. The results revealed that cadmium adversily affects the metabolism of O. niloticus, where the enzyme (ALT) can be used as good biomarker of contamination.https://ejabf.journals.ekb.eg/article_2019_430be4e3b9ae77de35fb622e1ab42308.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613113120090101On the occurrence of adult females of lernaea species (Crustacea:Copepoda) parasitic on goldfish Carassius auratus (Linnaeus) in some commercial aquaria in Egypt763202010.21608/ejabf.2009.2020ENAmina El-MansyNational Institute of Oceanography and Fisheries, 101 Kaser El-Einii St., Cairo,
EgyptJournal Article20170403The parasitic copepod Lernaea species infects the goldfish Carassius auratus and induces lernaeosis in commercial aquaria in Egypt. The early stages of Lernaea parasites appeared macroscopically as whitish spots. At about 15-24°C,<br />the infected fish with primitive stages were reared for reaching adult females. The former stages gradually change into brownish color and well adapted to attach to body surface of the host fish, causing at least 5 mm inflamed bloody<br />ulcers in the skin, fins, and muscles. Various postmetamorphic adult females of Lernaea parasites were differentiated, sketched, measured, and compared with previous related species. The majority of the present females were synchronized<br />on one fish specimen. The adult females were different according to the shape and size of holdfast organ. For the present females, the distinguishable taxonomical character was the wide variability in shape of anchors and their<br />processes (sub-horns). In addition, the variation in general morphology for each form was discernible. Moreover, Lernaea was found as economically important parasites. The massive infection reached about 29 parasites/ infected fish during<br />winter. The infected fish became nervous, loosing scales with severe damage particularly at the bases of fins. They also appeared stressed, exhausted and stopped feeding. Lernaea parasites also induced disruption, haemorrhage,<br />proliferation or necrosis and edema along the path of penetration in the host<br />tissue. Approximately two months later, white spots appeared on the naturally<br />infected fish and after nearly two weeks, most of them extruded without further<br />modifications.https://ejabf.journals.ekb.eg/article_2020_f0a347e7311b2a19c36985232a2a0e90.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613113120090101Lead and Zinc levels in some commercial fish species collected from Al-Shoggig coast, Red Sea at Jazzan south of Saudi Arabia.3742202110.21608/ejabf.2009.2021ENIbrahim Al-SuwitiDepartment of Zoology, College of Sciences, King Saud UniversityJournal Article20170403Astudy was conducted to determine the concentrations of lead and zinc in three of the commercial fishes collected from Al-shoggig coast on Red Sea South of Saudi Arabia. The values obtained were compared with the Saudi<br />Arabian standards organization (SASO, 1977) and the Environmental Protection Agency (EPA). In this study, zinc was found in higher concentrations in tissues of gills and liver in fish species compared with lead. However, both metals are<br />still within the permisible levels. Recommendation for further studies is givenhttps://ejabf.journals.ekb.eg/article_2021_2a78566e6378db9f30b654b076801c70.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613113120090101Edibility assessment of the swimming crab Charybdis natator (Brachyura: Portunidae) from the Gulf of Suez, Red Sea, Egypt4354202210.21608/ejabf.2009.2022ENWafaa SallamDepartment of Marine Sci., Fac. of Sci., Suez Canal Univ., Ismailia, EgyptAmaal Gab-AllaFood Technology Lab., Fac. of Agriculture, Suez Canal Univ., Ismailia, Egypt.Journal Article20170403The portunid crab Charybdis natator exists in the commercial catches of the Gulf of Suez trawlers in a considerable quantity. Although edible worldwide, this crab is hardly known among local consumers. This study aimed<br />to assess the suitability of this crab as food. Examination of the muscle tissues was carried out in terms of biochemical composition (protein, lipids and carbohydrates) and the accumulation of the heavy metals (Cd, Cu, Fe, Pb and<br />Zn). Organoleptic differences among the cooked meat of this species and that of the popular species Portunus pelagicus were tested. Protein constituted over 80% of the muscles dry weight of male and female crab, followed by lipids<br />(7.25-7.79%) and carbohydrates (5.39-6.26%) respectively. Zn was the highest accumulated metal (46.6, 45.4ppm) followed by Cu (24.4, 36.6 ppm), Fe (21.8,36.2 ppm) and Pb (3.9, 4.6ppm), while Cd was the lowest (0.9ppm) in males and females respectively. Intra-specific and size-based variations in metal uptake were recorded. Test of organoleptic qualities ranked P. pelagicus as higher in all attributes. However, no significant difference was observed in the total<br />acceptability of the two species (P≥ 0.05). The study highlighted the suitability of C. natator as edible, nutritive and safe seafood.https://ejabf.journals.ekb.eg/article_2022_abcaed0e8a75512f70ae6be3f9b6c319.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613113120090101Fisheries of experimental purse seine net using light and population dynamics of Sardinella aurita (Family Clupeidae) east of Alexandria,Egypt.5577202310.21608/ejabf.2009.2023ENEL- Sayed . AkelNational Institute of Ocean.& Fish., Alex., EgyptJournal Article20170403The present study is focused on investigating the fisheries of pelagic fish caught by purse seiners using light from Alexandria to Rosetta during 2007. Five experimental fishing operations were processed seasonally (spring, summer<br />and autumn).The fishing operation and sampling were explained. Analysis of species composition (seasonal and total) and size composition were carried out. A comparison between the present study and other previous studies was done.<br />The average catch of the net per night was maximum during summer (1295 Kg),while minimum one during autumn (479 Kg). The most abundant fish in the catch throughout the year was Sardinella aurita followed by Etrumeus teres,<br />Sardina pilchardus, Scomber japonicus, Boops boops, Trachurus mediterraneus,and Engraulis encrasicholus respectively.<br />Growth and dynamic parameters of S. aurita, as it is the main economic pelagic fish species, were investigated. The results obtained show that back – calculated lengths (based on scales readings) for the first, second, third, fourth<br />and fifth age groups were 12.24; 15.9; 18.98; 21.36 and 22.17 cm respectively.The corresponding weights for the same age groups were 14.31; 28.93; 46.57; 63.98 and 70.71 gm respectively. The length-weight relationship was<br />represented by the formula: Log W = 0.01701 + 2.68904 Log L. The estimated von Bertalanffy growth<br />parameters were L∞ = 25.55 cm; K = o.3537 year -1 and to = - 0.81.Growth performance: 2.368. Maximum age: 7.59 year. Total mortality (Z), natural mortality (M) and fishing mortality (F) were: 1.467; 0.86959 and 0.5974<br />respectively. The yield per recruit indicated that maximum sustainable yield was 18.5 g at fishing mortality (F) 2.8 .Maximum optimum yield was 16.7 g at fishing mortality 1.2 .The current yield was 13.5 g at fishing mortality 0.597.<br />Meanwhile biomass was 22.6 g at exploitation rate o.313; 13.9 g at exploitation rate 0.51 and 6.6 g at exploitation rate of 0.74 respectively. The exploitation rate (E): 0.31336 proved that this species is under exploitation by purse seine using<br />light.https://ejabf.journals.ekb.eg/article_2023_8cb482304a87b0e55c0ddb16f4567b23.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613113120090101Distribution and feeding ecology of the angelfishes (Pomacanthidae) in Shalateen region, Red Sea, Egypt7991202410.21608/ejabf.2009.2024ENMagdy AlwanyDepartment of Marine Sci., Faculty of Sci., Suez Canal Univ., Ismailia, EgyptJournal Article20170403This study aimed to estimate the distribution and feeding ecology of the angelfishes (Family Pomacanthidae) in Shalateen region, Red Sea, Egypt. The total number of recovered species was six species, where Centropyge<br />multispinis and Pygoplites diacanthus were the most abundant at most sites, while Pomacanthus imperator and P. maculosus were the lowest. The royal angelfish, Pygoplites diacanthus, was represented in all sites and all reef zones<br />in Shalateen region. Most angelfish species were not found on the reef flat (except Pygoplites diacanthus), since they prefer the reef slope and increase with depth. Based on the number of individuals, the reef flat comprised only 2.7 % of<br />the total Pomacanthids population, while the slope comprised 97.3 % of population (34.1 % at 1-10 m depth and 63.2 % at 10-20 m depth). The highest feeding rate was recorded for C. multispinis, with 84.3±26.4 bites⋅(5min)-1, while<br />the lowest was recorded for P. maculosus, with 58.9±21.6 bites⋅(5min)-1. Most species of angelfishes use biting mode for feeding and diurnal feeders, except Genicanthus caudovittatus that use ram mode for feeding on zooplankton and<br />nocturnal feeder. Feeding guilds are divided into three categories: a) invertebrate-feeders, represented by three species, namely P. asfur, P. imperator and P. maculosus, b) omnivores, represented by two species, C. multispinis and<br />Pygoplites diacanthus, c) zooplankton feeder, represented by only G. caudovittatus. https://ejabf.journals.ekb.eg/article_2024_7aeff94ddd7d2bdee8bd9ddbf2a98920.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613113120090101Nutrition evaluation of sesame seed meal, Sesamum indicum (L.) as alternative protein source in diets of juvenile mono-sex Nile tilapia (Oreochromis niloticus).93106202610.21608/ejabf.2009.2026ENDeyab El-SaidyDepartment of Poultry Production, Faculty of Agriculture, University of
Minufiya, Shebin El-Kom, Egypt.Samy MahmoudAnimal Production Research Institute, Utilization By-Products Department,
Agriculture Research Center, Dokki, Giza, Egypt.Hayam TonsyAnimal Production Research Institute, Utilization By-Products Department,
Agriculture Research Center, Dokki, Giza, Egypt.Journal Article20170403he main objective of this study was to evaluate the effect of partial and total replacement of fish meal protein by sesame seed meal (SSM) protein in commercial diets on growth performance, feed utilization and body<br />composition of juvenile mono sex Nile tilapia, Oreochromis niloticus (L.). Fish of an average initial weight of 0.60 ± 0.01 g were stocked in 15 glass aquaria (80 l each) at a rate of 15 fish per aquarium. Fish meal protein (18% of the diet) was<br />used as the sole source of animal protein in the control diet. Percent replacements of fish meal by sesame seed meal on the basis of crude protein were as follows: 0 % (control diet A), 25 % (diet B), 50 % (diet C), 75 % (diet<br />D) and 100 % (diet E). All tested diets were almost isonitrogenous and fed at a rate of 4 % of fish body weight, and then gradually reduced to 3 % of the total fish biomass daily, for a period of 16 weeks. The results of this study revealed<br />that, fish fedon diet A (100 % FM) had the highest average body weight, specific growth rate (SGR), weight gain %, feed conversion ratio (FCR), and protein efficiency ratio (PER), but the lowest was obtained with fish fed diet E (100 %<br />SSM). The same parameters of fish fed on diets B (25 % SSM) and diet C (50 % SSM) were not significantly different (P > 0.01) from those of fish fed on the control diet A. Proximate composition of the whole body moisture and ash<br />contents were not significantly affected (P>0.05) by the dietary treatments.Whole body protein contents for fish fed on diets B, C and D were superior to the control diet. Incorporation of sesame seed meal in the fish diets increased<br />significantly whole body fat content. Incorporation of sesame seed meal in the diets significantly increased apparent digestibility coefficients of crude protein, crude fat and energy. Therefore, these results suggest that up to 50 % of fish<br />meal protein can be replaced by sesame seed protein in mono sex Nile tilapia diets without any adverse effect on growth performance and feed utilization,body composition and digestibility. https://ejabf.journals.ekb.eg/article_2026_c72533b136469524d71127a7aa060aa7.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613113120090101Comparative histological and ultrastructural studies on the liver and pancreas of Schilbe mystus and Labeo niloticus107127202710.21608/ejabf.2009.2027ENSuzan NaguibDepartment of Zoology, Faculty of Science, Ain Shams University, EgyptWilliam RizkallaDepartment of Zoology, Faculty of Science, Ain Shams University, EgyptFawzia Ashour Abd El-GhafarAbd El-RahmanDepartment of Zoology, Faculty of Science, Ain Shams University, Egypt0000-0002-2204-283xJournal Article20170403The present investigation aims to illustrate the histological and ultrastructural differences of the liver and pancreas of a carnivorous fish, Schilbe mystus, and a herbivorous fish, Labeo niloticus. The histological examination of the liver<br />of both studied species revealed that the liver is mainly composed of a continuous compact field of the hepatocytes. The hepatocyte-sinusoidal structure of the liver of Schilbe mystus consists of the solid form and tubular one, while<br />that of Labeo niloticus consists of the tubular form and cord-like one.The ultrastructural examination of the liver of both studied species revealed that it is composed mainly of hepatocytes, Kupffer (macrophages) and to (fat-storing) cells. The hepatocytes of Schilbe mystus are characterized by the presence of numerous glycogen rosettes, numerous lipid droplets and a rough endoplasmic reticulum, while those of Labeo niloticus are characterized by the presence of numerous glycogen rosettes, a few lipid droplets and a roughendoplasmic reticulum. The hepatocytes of both studied species possess numerous microvilli, which extend into the space of Disse or into the bile canaliculi lumina.<br />In both studied species, there is a prominent perisinusoidal space between the hepatocytes and blood sinusoids, the space of Disse. This space usually contains the Ito cells, which are stellate in shape and are characterized by the<br />presence of lipid droplets. The bile canaliculi of Schilbe mystus are of the intercellular type, while<br />those of Labeo niloticus are of both the intercellular and intracellular types. The histological investigation of the pancreas of both studied species revealed that there are three types: the compact, disseminated and intrahepatic<br />types. This pancreas showed that it consists of a highly lobulated gland of the compound acinar type. The acinar (pancreatic) cells are pyramidal in shape; they possess a basophilic cytoplasm and eosinophilic zymogenous secretory granules. The ultrastructural investigation of the acinar cells of both studied species revealed two cell types: the dark and light acinar cells. These cells are characterized by the presence of numerous zymogenous secretory granules and a<br />well-developed rough endoplasmic reticulum. https://ejabf.journals.ekb.eg/article_2027_b8de35470f50dec666a75285066bcac5.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613113120090101تاثير عنصر الکادميوم علي مستوي أنزيم أمينوترانستفيريز في أنسجه سمکه البلطي النيلي (اريوکروس نيلوتيکس )التي جمعت من وادي حنيفه الرياض المملکه العربيه السعوديه18202810.21608/ejabf.2009.2028ENJournal Article20170403https://ejabf.journals.ekb.eg/article_2028_3f940d9327fb5dd30ebd83eb60350131.pdf