@article { author = {Hassanine, Reda}, title = {ON THREE DIGENEAN TREMATODES (FAMILY BUCEPHALIDAE) FROM MARINE TELEOST FISHES WITH NEW RECORD FROM THE RED SEA}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {1-16}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1748}, abstract = {T^hree bucephalid species (Trematoda: Digenea: Bucephalidae) belonging to different genera were recorded and redescribed for the first time from the Red Sea fishes. These worms include: Prosorhynchoides arcuatus (Linton, 1900) Bray, 1984 from the pyloric caeca and intestine of Variola lout I Myorhynchus pritchardae Durio and Manter, 1968 from the intestine of Epinephelus malabaricus, and BucephaJopsis sirogylurae (Hopkins, 1954) Yamaguti, 1958 from the intestine of Hyporhamphus gambamr. In starved fishes (Kept alive in the aqurium), individuals of P. arcuatus were only found in the pyloric caeca, but in freshly caught fishes, they were found aggregated in the anterior intestine. This backward migration of the worms was briefly discusscd. The thorough redescription of M. pritchardae (the type and the only species in the genus) revealed that Myorhynchus is actually a synonym of the genus Prosorhynchns Odhner, 1905. Therefore, M. pritchardae wt*s renamed as P. pritchardae (Durio and Manter, 1968) as a new combination. Also, the broadened redescription of B. sirogylurae revealed that B. hemirhamphi Fischthal and Nasir, 1974 is actually a synonym of this species.}, keywords = {ON THREE DIGENEAN TREMATODES (FAMILY,BUCEPHALIDAE) FROM MARINE TELEOST FISHES,WITH NEW RECORD FROM THE RED SEA}, url = {https://ejabf.journals.ekb.eg/article_1748.html}, eprint = {https://ejabf.journals.ekb.eg/article_1748_824474db246b958a17c042d608fe4bb7.pdf} } @article { author = {El Hamm»dy, Ahmed}, title = {CARBOHYDRATE TO LIPID RATIO (CHO.-.L) IN PRACTICAL T1LAPIA DIETS: 1- EFFECT OF DIETARY CARBOHYDRATE TO LIPID RATEO ON GROWTH PERFORMANCE OF HYBRID TILAPIA {Oreochromis niloticus x O auretts).}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {17-38}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1749}, abstract = {A160 day feeding trial was performed to determine the effects of .dietary carbohydrate to lipid ratio (CHO:L) on growth and body composition of hybrid tilapia (40.6 ± 0.43 g, initial weight). Eight artificial diets were formulated, representing two protein levels (25 and 30%) , within each level four carbohydrate to lipid ratios (2,4,6 and 8 CHO:L ratio) were tested. Growth rates in fish differed (P<0.05) with CHO:L ratio. Weight gain ('%) was significantly lower (P<0.05) in fish fed diets containing low crude protein. Maximum weight gain (363.5%), SGR (0.%% /day), FCE (43.4%). protein retention (24.4%) and energy retention (15.7%) were observed in fish fed a 6 CHO:L ratio. Fish fed either high protein and low protein within 2 and 8 CHO:L ratios tended to produce.' leaver growth and feed conversion efficiency. The different CHO:L ratios had effect on percentage body lipid. HSI (%) offish increased, however, total lipid of liver decreased (P<0.05) as CHO:L increased- The.se results indicate that hybrid tilapia efficiently utilize carbohydrate to lipid ratio for growth performance when increased up to 6.0 CHO:L ratio. Higher dietary CHO:L ratio up to 6 with low protein level in diet (25% CP) may result in sparing effect for high dietary protein (30%) with 4 CHO:L ratio.}, keywords = {hybrid tilapia,carbohydrate to lipid ratio,Growth performance,total lipid of liver}, url = {https://ejabf.journals.ekb.eg/article_1749.html}, eprint = {https://ejabf.journals.ekb.eg/article_1749_01c7ec3f6fb51c646381488f7f4e1f6c.pdf} } @article { author = {El- Haaimady, Ahmed}, title = {CARBOHYDRATE TO LIPID RATIO(CHO/L) IN PRACTICAL TILAPIA DIETS: 2- RESPONSE OF BODY SIZE IN HYBRID TILAPIA (OREOCHROMISNILOTICUSXOREOCHROMISAVREUS) TO INCREASED LEVEL OF CHO/ L RATIO IN DIETS.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {39-58}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1750}, abstract = {Four artificial diets were formulated to contain four carbohydrate to tipid ratios (CHO/ L) (2, 4, 6 and 8). The gross energy of each diet was adjusted by balancing the biscuit industry by - product as a carbohydrate .source and cotton seed oil mix to provide four tested CHO:L ratios. The diets were used to determine the optimum dietary level of CIIO:L ratio for two sizes of hybrid tilpia initially weighing 10.0 and 80.0g for 160 days.Growth values were better with feed 4CHO:L ratio for the smaller fish, whereas similar (4) CHO:L ratio yielded the highest feed conversion efficiency, protein, energy and lipid retained for the same size (with the starting average weight 10.Og respectively). However, feeds with 6 CHO:L ratio proved better in large hybrid tilapia (initially weighing 80.Og). The hepatosomatic index showed higher values for feeds with 8 CHO:L ratio in the case of small and large fish, but the opposite was observed for liver lipid content which showed a tendency toward higher values for 2 CHO:L ratio in both small and large hybrid tilapia. These data suggest that small hybrid tilapia can perform well with diet containing 4 CHO:L ratio, whereas large fish may be as efficiently at 6 CHO:L ratio}, keywords = {hybrid tilapia,carbohydrate to Jipid ratio,fish size,Growth performance,hepatosomatic index}, url = {https://ejabf.journals.ekb.eg/article_1750.html}, eprint = {https://ejabf.journals.ekb.eg/article_1750_658d9fd3dee40e9fcbcfa16a9be69daf.pdf} } @article { author = {Labib, Wagdy}, title = {PHYTQ-ZQOPLANKTQN COUPLING OFF ALEXANDRIA (EGYPT)}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {59-84}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1751}, abstract = {Based on short-term sampling collection in the neritic waters off Alexandria (Egypt), diatoms contributed recurrent intensive occurrence most of the time, while the microflagellates Micromonas and Pyramimonas species appeared in the transient periods (October and May). Zooplankton exhibited several peaks in early and late September, mid-January and early August, mainly copepods and protozoan species. Phylo-zooplankton abundance was affected by mxUti-factorial control with temperature and salinity being the majors, and nitrate at some time.Zooplankton grazing has been postulated to play at times an effective role in regulating the phytoplankton cycle, and inflects losses on its numerical standing crop. Yet, their large continuous seasonal variations had strongly influenced the phyto-zooplankton relationship. Subsequently, different patterns could be distinguished; top-bottom (inverse) relationship at intermittent periods when diatoms dominated; reduced grazing pressure connected with specific diatom species (Asterionellci glacial b\ Chaeioceros spp., Rhizosoleriia delicaiula)\ and/or with mixed community of diatom, dinoflagellate and euglenophyte species; inability of grazing to control blooms of the fast-growing diatoms (Cy/indrofheca closleriunu Thalassiosira spp.), and that of microflagellates of mono-specific nature {Pyramimonas spp.); positive increasing relationship with small-sized cells {Skeletonema costatum, Thalassiosira spp.);and a time lag (massive zooplankton occurrence followed that of phytoplankton within a week during August and September). Zooplankton grazing pressure could help the change in phytoplankton dominance and composition (the possible avoidance of zooplankton consumers to take up the non-diatom, cells as long as the smaller producers T. subtilis.. T. pseudonana and S. costaium were present, offering some advantage to non-diatom species to dominate).}, keywords = {Phylo-Zooplankton variability,interaction,neritic waters,alexandria}, url = {https://ejabf.journals.ekb.eg/article_1751.html}, eprint = {https://ejabf.journals.ekb.eg/article_1751_7b1fee111604158c51ff4e7455603b7d.pdf} } @article { author = {El-Balshy, Ragaa and El-Serafy, Sabry and El-Hashash, Ahmed}, title = {THE DEVELOPMENT OF THE NEURAL CREST IN THE CEPHALIC REGION OF XIPHOPHORUS HbJ.LRl}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {85-120}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1752}, abstract = {The site, time of segregation and migratory pathways of the neural crest cells are studied in the head region of seven developmental stages (0.7; 1.0; 1.5; 2.0; 3.0; 4.2 and 6.0 mm total length) of the teieost fish Xiphophorus helleri Moreover, the changes in the distribution of the extracellular matrix components during the migration of the neural crest cells and their differentiation are also considered. The formation, segregation and migration of the neural crest cell take place after complete formation of the neural keel in an antero-poslerior direction. The migration of the neural crest cells at the head region occurred in three migratory pathways. The first pathway is ventral along the brain and notochord. The second pathway is lateral in the sub-eclodermal space. The third pathway, contralateral pathway, is across the dorsal midline of the fore-brain and mid-brain.Non-sullat.ed giycosamiuoglycans are the main extracellular matrix (UCM) components, that may facilitate the neural crest celt migration and invasion to form the corneal endothelium and some cartilages of the chondrocraniucn. Sulfated glycosaminoglycans may provoke the arrest of the crest cells to form the iris melanophorcs.The cranial neural crest cells are aggregated at certain levels to form the presumptive proximal ganglionic primordia of 5U (Irigeimnal), 7lh (facial) 9lh? (glossophavyngeal). and 10lh (vagus) cranial nerves. Neutral polysaccharides are stm to be the predominant matrix components that probably provoke the crest cell aggregation to form these structures and siromal fibroblasis.}, keywords = {Development,Neural Crest,Fishes}, url = {https://ejabf.journals.ekb.eg/article_1752.html}, eprint = {https://ejabf.journals.ekb.eg/article_1752_d1c88966dacb916fca79afd7ca649239.pdf} } @article { author = {Bakhoum, Shnoudy}, title = {COMPARITIVE REPRODUCTIVE BIOLOGY OF THE NILE TILAPIA OREOCHROMIS NILOTICUS ( L.), BLUE TIL API A, Oreochromis aureus ( Steind.) AND THEIR HYBRIDS IN LAKE EDKU, EGYPT}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {121-142}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1753}, abstract = {The reproductive biology of Oreochromis niloticus, O, aureus and their hybrids from Lake Edku was examined. Female and male sex ratio is 1:1.07 for Nile tilapia (O. niloticus), 1:1.20 for blue tilapia (O. aureus) and 1:1.37 for hybrids. Length at first sexual maturity is 9.4cm (TL) for males and 10.3 cm (TL) for females of O. niloticus. The corresponding values for males and females of O. aureus are 8.2 and 9.2 cm respectively, while for hybrids these values are 8.2 cm for males and 8.4 cm for females. The breeding season of Nile tilapia extended from April to September with a peak of gonadosomatic index (GSI) in May, whereas in case of blue tilapia and hybrids, it extended from February until November with a maximum value in May. For all fish groups, the fecundity showed curvilinear relationship to fish length, body weight and ovary weight, The present study revealed that blue tilapia and hybrids are markedly less fertile than Nile tilapia.}, keywords = {Reproductive biology,0. nilolicus,O. aureus,Hybrids,Lake Edku}, url = {https://ejabf.journals.ekb.eg/article_1753.html}, eprint = {https://ejabf.journals.ekb.eg/article_1753_c677a44cf0888dcd619f590a456fc67e.pdf} } @article { author = {Bakhoum, Shnoudy}, title = {OCCURRENCE OF NATURAL HYBRIDS BETWEEN NILE * TILAPIA, Oreochromis niloticus (L.) AND BLUE TILAPIA Oreochromis aureus ( Steind.) IN LAKE EDKU, EGYPT.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {143-162}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1754}, abstract = {The Nile tilapia {Oreochromis niloticus),b\vLt tilapia, {Oreochromis aureus) and specimens showing intermediate external appearance to both species were sampled from Lake Edku and examined for differences in morphological characteristics to determine the natural hybrids of these species. The results of univariate analyses indicated highly significant differences of biotnetric characters between the hybrid groups and parental species. Multivariate analysis of meristic and morphometric values showed significant differences between all examined fish groups. The number of biometrics characters, which revealed significant differences between Nile tilapia and its hybrids, ranged from four to five out of seven meristic and twelve to fifteen out of twenty-one morphometric characters. Meanwhile, between blue tilapia and hybrids there were two to five out of seven and fourteen to sixteen out of twenty-one meristic and morphometric characters respectively. Also discriminate function analysis indicated that the biometric variables giving the most separation between the hybrid and parental species were dorsal fin spines, vertebrae number, pectoral fin length, postorbital length, head length and interorbital width. A classification to groups using the above functions derived from morphometric data yielded stronger separation than meristic counts for the examined groups. The results indicated the existence of natural hybridization between O. niloticus and 0. aureus in Lake Edku.}, keywords = {Cichlidae,Oreochromis niloticus,Oreochromis aureus,Hybridization,Biometrics,Lake Edku,Egypt}, url = {https://ejabf.journals.ekb.eg/article_1754.html}, eprint = {https://ejabf.journals.ekb.eg/article_1754_c38138473a0753262904d76cfdb1927c.pdf} } @article { author = {Saad, Amal and Habashy, Madlen}, title = {SURVIVAL AND GROWTH RATES OF EARLY STAGES OF SOME FISH SPECIES REARED WITH THE RESHWATER CRAYFISH,PROCAMBARUS CLARKII (GERARD, 1852}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {163-180}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1755}, abstract = {AGroup of the exotic crayfish, Procambarus clarkii (total length ranging from 4 to 6.1 cm) was held with the early stages of fry of common carp, Cyprinus carpio Linnaeus, 1758 ; silver carp, Hypophthalmichthys molitrix (Valenciennes, 1844) ; Nile tilapia, Ore'ochromis nihticus (Linnaeus, 1757) ; and Sartherodon galilaeus (Artedi,1757), with initial average lengtii ranging from 2 to 2.5 cm and fingerlings with initial average length rangmg from 4.1 to 5.8 cm . Each species were held separetely with the crayfish 5 aiming to find out its effect on both survival and growth rates of the above fin fish in polyculture.The results indicated that the survival rates ranged from 74.4 to 88.9% compared with a range of 76.6 to 94.65% in control experiments for the early fry stages of the four different fish species. For the fingerlings the range was 71.1 to 93.3% compared with 76.65 to 93.35 % in control experiments .There were no significant differences in the survival rate of the four fish species cultured in combination with the crayfish and the fish kept alone ( control).When rearing O. niloticus ( 2.3 g in weight and 4 cm in length ) with young crayfish ( 1.76 g in weight and 4.39 cm in total length ) for three months, the results showed that the final weight was significantly different (P < 0.01 ) for fish reared alone, while no significant differences were observed in weight gain and specific growth rate. There was, however, a significant difference ( P< 0.001 ) in the final weight for crayfish reared in combination with tilapia, while there were no significant differences in weight gain or specific growth rate. It seems that the presence of crayfish in a mixed culture}, keywords = {Procambarus clarkii,freshwater fish,mixed culture,Growth,survival rates}, url = {https://ejabf.journals.ekb.eg/article_1755.html}, eprint = {https://ejabf.journals.ekb.eg/article_1755_22d4b37c673e500b6ac696c2f21215dd.pdf} } @article { author = {El-Ashram, Ahmed}, title = {ON AEROMONAS HYDROPHILA INFECTION AMONG CULTURED TILAPIAS : A BIOLOGICAL, HISTOPATHOLOGICAL AND MANAGEMENT STUDY}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {181-202}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1756}, abstract = {The prevalence of Aeromonas hydrophila infection, the causative agent of motile Aeromonas septicemia, was 47.3% among the diseased cultured tilapias. Oreochromis niloticus was the more sensitive species to MAS. MAS infected tilapia showed loss of balance, reduced growth, fins and tail rot, ulcer and enlargement of the abdomen. Internally, the organs were congested. The intraperitoneal route was more pathogenic than intramuscular one in the experimentally infected 0. niloticus. Microscopically different organs showed histopathological changes.Also, changes in serum biochemical parameters were recorded. The antibacterial activity of Oxytetracyclin (OTC) was evaluated both invitro and in vivo. OTC was the drug of choice for the control and prevention of MAS under laboratory and field conditions. Immunization of tilapia with formalin-killed whole culture vaccine through intraperitoneal route gave successful results.}, keywords = {Aefomonas hydrophila,tilapia,histopathology,biology,Management,Oxytetracycline,vaccine}, url = {https://ejabf.journals.ekb.eg/article_1756.html}, eprint = {https://ejabf.journals.ekb.eg/article_1756_2a0a38f0f6a0e8b03b8dd26b9ea3e504.pdf} } @article { author = {El-Serafy, Sabry and Morsy, Gazaa and Ramadan, Moustafa and Lashein, Gihan}, title = {HEMIURUS SHALABYI S¥. N (DIGENEA: HEMIURIDAE) FROM THE CARANGID FISH, TRACHURUSINDICUS, INLAKE TIMSAH, EGYPT.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {203-215}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1757}, abstract = {T Temiurus shalabyi sp. n. is the first record of the genus from Lake -£ JL Timsah and the second species of the genus in Egypt It is described from the stomach of Trachurus indicus (Carangidae) locally named "Bagha Om Ain" from Lake Timsah. The prevalence of the parasite was 18.8% with intensity of infection being 2-4 worms per fish.Hemiurus shalabyi is easily distinguished from all the other known species of the genus by the number, shape and position of vitellaria, in addition to the extension of the intestinal caeca and the uterus into the ecsoma. The differences between the present new species and the previously described species of the genus from Egypt, K suezensis Aboul-Hag, 1990 were discussed.}, keywords = {Digenea,Hemiuridae,Hemiurus,Carangidae,Timsah}, url = {https://ejabf.journals.ekb.eg/article_1757.html}, eprint = {https://ejabf.journals.ekb.eg/article_1757_49cfab007ea9c9ac2c33d6f9f8b605d9.pdf} } @article { author = {Sahar F. Mehanna, Sahar F. Mehanna}, title = {FISHERIES MANAGEMENT OF THE SLIMY MACKEREL SCOMBER JAPONICUS W THE GULF OF SUEZ BASED ON RELATIVE YIELD PER RECRUIT ANALYSIS.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {217-232}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1758}, abstract = {Atotal of 928 slimy mackerel Scomber japonicus was collected from the Gulf of Suez during the fishing season 2000/2001. Age, growth, mortality, relative yield per recruit and biomass per recruit were studied. Age was determined by otolith-reading technique and was found to be four years. The values of the von Bertalanffy growthparameters were K = 0.48 year"1 and L^ = 33.06 cm. The mean total mortality coefficient "Z" was found to be 1.24 year"1. The natural mortality coefficient "M" was estimated as 0.22 year"1. Exploitation rate E was estimated as 0.82. The relative yield per recruit and biomass per recruit analysis showed that the stock of Scomber japonicus in the Gulf of Suez is overexploited and the fishing mortality should be decreased while length and age at first capture should be increased.}, keywords = {Scomber japonicus,Age,Growth,mortality exploitation rate,length at first capture,relative yield relative biomass per recruit}, url = {https://ejabf.journals.ekb.eg/article_1758.html}, eprint = {https://ejabf.journals.ekb.eg/article_1758_e6a63e782a0f98f17bcbca93525da942.pdf} } @article { author = {EL-Fiky, Nabil}, title = {THE INFLUENCE OF WATER pHONTHE EMBRYONIC DEVELOPMENT OF GRASS CARP, TENOPHARYNGODONIDELL4}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {233-261}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1760}, abstract = {This study was conducted to evaluate the effect of water pH on embryonic development of grass carp {Ctenopharyngodonidella). Eggs of grass carp were incubated in different levels of acidic and alkaline water. The general embryonic development was described briefly. Moreover, details were given as to the epiboly stage.The effect of the following pH values was tested: acidic water (4.5, 5.0 and 5.5) and alkaline water (9.5,10.0, and 10.5) on the embryonic evelopment. Acidification and alkalization caused disturbances in cleavage and blastula formation and delay of hatching. At pH 4.5 and 10.5, there were no live eggs in 20h after fertilization. Mortality during the development indicate that the mostsensitive stages were embryos just after fertilization and at hatching period. This study indicates that embryonic development of grass carp was possible within the range of pH 5.5 - 9.5, although at the extreme pH levels, certain disturbances and increased mortality occurred. The changes and anomalies during development might havecaused larva mortality during hatching. Survival of the embryos was calculated during development The percent of hatched eggs was calculated in relation to the number of fertilized eggs. The highest percentages of dead embryos were noticed at the extreme pH (4.5) and pH (10.5). The highest percentage of eyed embryos were recorded at pH (5.5) and pH (lO.O).The quality of the hatched larvae in abnormal levels of pH was worse compared to the control. Theydied gradually from the beginning of rearing in neutral water.Light and scanning electron microscopy (SEM) were used tostudy the effect of abnormal pH on the development of free neuromasts and structure of the eye. Excessive number of free neuromasts were found on the head region of hatched larvae incubated at alkaline pH. Differentiation of retina was inhibited at the same condition. Acidic pH caused partially delaminated lens epithelium and reduce the number of chromatophores .However, in the view of the results obtained, it can be stated that, even a short-term change of pH (resulting from industrial sewege) may adversely influence fish population, especially if occurs during embryonic development.}, keywords = {Water pH,Embryonic development,Grass carp,Ctenopharyngodon idella}, url = {https://ejabf.journals.ekb.eg/article_1760.html}, eprint = {https://ejabf.journals.ekb.eg/article_1760_fe70699b7481279654cd5d97d830aad5.pdf} } @article { author = {}, title = {عن ثلاثه من ديدان التريماتودا ثنائيه الجيل (عائله بيو سيفاليدي ) من بعض الأسماک العظميه البحريه مع تسجيلها لأول مره من البحر الأحمر}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {3}, pages = {1-12}, year = {2002}, publisher = {The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)}, issn = {1110-6131}, eissn = {2536-9814}, doi = {10.21608/ejabf.2002.1761}, abstract = {}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_1761.html}, eprint = {https://ejabf.journals.ekb.eg/article_1761_dca8f5bf9a52697cbf55a6235af5a75b.pdf} }