@article { author = {Abdel Aziz, Nagwa}, title = {IMPACT OF WATER CIRCULATION AND DISCHARGED WASTES ON ZOOPLANKTON DYNAMICS IN THE WESTERN HARBOUR OF ALEXANDRIA, EGYPT}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {1-21}, 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.2002.1725}, abstract = {A /Tonthly variations of species composition and abundance of -^-^-zooplankton community in the Western harbour were studied during the period from April 1999 to March 2000 in relation to the effect of water circulation and the discharged waste waters. The results indicated significant role of freshwater species (39 spp.) in the zooplakton community (11 lspp.) in the harbour, providing the highest occurrence during the warm period (May- October) with the increase of discharged waters. However, spatially, the community structure showed a more or less homogenous distribution most of the year, reflecting the effect of water circulation pattern in the harbour.Except the relatively high density in July (48.4x103 ind./m3), the standing stock ( annual average: 26.7xl03 ind./m3) indicated low zooplankton production in the harbour. Copepods and tintinnids were the major component of the zooplankton stock, forming 46.4% and 24.8% of its total counts respectively, followed by freshwater ciliates and rotifers (7.5% and 7.2%). The abundance of total zooplankton as well as each group showed seasonal variations, with the exception of the minimum and maximum values, providing two periods of different production levels. The diversity index values revealed higher diversity of tintinnids than copepods.}, keywords = {Western Harbour,Zooplankton,discharged wastes,plankton ecology,pollution impact}, url = {https://ejabf.journals.ekb.eg/article_1725.html}, eprint = {https://ejabf.journals.ekb.eg/article_1725_182a58e8d372c778551b35add35b5d70.pdf} } @article { author = {Hellal, Ahmed and Abou Zeid, Mohamed and Hassan, Mohamed and El-Samra, Mohamed}, title = {STUDY ON THE HOLOTHUROID FAUNA (ECHINODERMATA: HOLOTHUROIDEA) INHABITING THE SHALLOW WATERS OF THE EGYPTIAN RED SEA}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {23-45}, 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.2002.1726}, abstract = {An intensive survey was carried out on the shallow water of the Egyptian coast and Islands of the Red Sea down to 22° N LaL including Gulfs of Aqaba and Suez to study the holothuroid fauna, A total number of 32 holothuroid species was collected belonging to 8 genera; 3 families and 2 orders. A taxonomio key to the species level was constructed to facilitate the identification of the collected species. Among the obtained species, Bohadschia mitsioensis, Bohadschia vitiensis, Holothuria (Fhymiosyeia) conusalba, Labidodemas rugosum, Holothuria (Platyperona) crosnieri, Holothuria (Mertensiotkuria) albofusca and Stichopus horrens were recorded for the first time from the entire Red Sea. Among the 32 species, 5 species (15.6 %) were cosmopolitan, 6 species (18.7 %) were widely distributed, 18 species (56.3 %) were restricted in their distribution to some places in the Indian Ocean and 3 species (9.4 %) were endemic to the Red Sea. Study on micro-habitat distribution showed that species of genera Actinopyga and Bohadschia were surf zo^e species,,, and most species of genus Holothuria were fugitive species, while species of subgenera Cystipus, theelothuria and Metriatyla were mainly fossorial species.}, keywords = {Ecinodermata,Holothuroidea,Red Sea,Gulf of Aqaba Gulf of Suez}, url = {https://ejabf.journals.ekb.eg/article_1726.html}, eprint = {https://ejabf.journals.ekb.eg/article_1726_dbf470b9987c0f18c4ac13f49b39b9fd.pdf} } @article { author = {El-Ganainy, Azza and E.T, Mostafa and A.A, Oraran}, title = {FISHERY STATUS OF THE STRIPED MULLET (PISCES: MUGILIDAE) FROM BARDAW1L LAGOON, EGYPT I- AGE AND GROWTH OF MUGIL CEPHALUS}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {47-65}, 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.2002.1727}, abstract = {This study deals with age determination of the striped mullet Mugil cephalus collected from Bardawil Lagoon during four successive fishing seasons (1995 to 1998). The scale reading and length frequency analysis show that the catch of M cephalus consists of 6 year classes. Age groups I and II represent the bulk of the catch. The growth parameters were determined from both length frequency and length-at-age data. The estimated parameters based on length -at-age data wereU = 74,164 cm., K= 0.246 Y"1 and t0 = -0.969 The similarity of the estimated growth parameters is reflected in the small range of the growth performance index (q>), which indicates the compatibility of the two methods for the assessment of this species. The length weight relationship was calculated for each season separately and the mean resultant formula was W= 0.01547}, keywords = {Mugil cephalus,age and growth,length frequency analysis,Bardawil Lagoon}, url = {https://ejabf.journals.ekb.eg/article_1727.html}, eprint = {https://ejabf.journals.ekb.eg/article_1727_9b80728f7ca2b13d0f4dab70f8e1370b.pdf} } @article { author = {El-Ganainy, Azza and Ahmed, Ashraf}, title = {GROWTH, MORTALITY AND YIELD-PER-RECRUIT OF THE RABBIT FISH, SIGANUS RJVULA TUS, FROM THE EASTERN SIDE OF THE GULF OF SUEZ, SINAI COAST, RED SEA}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {67-81}, 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.2002.1728}, abstract = {Length-based methods were used to study the growth of the rabbit fish Siganus rivulatus, in the eastern side of the Gulf of Suez. A total of 600 specimens were collected from the small-scale artisnal fishery landed in Al-Tur region during the period from March 2000 to February 2001. Length frequency distributions were analyzed and normal components were discriminated. The estimated vonBertalanffy growth parameters were L« = 29.409 cm, K = 0.735 y-1 and .to - - 0.22 y. The growth performance index (G>) was 2.803. The instantaneous total, natural and fishing mortality coefficients were 3.15, 1.431 and 1.72 respectively! The Beverton and Holt (1966) yield-per-recmit model was conducted in order to evaluate the status of the fishery. The results indicated that the Siganus rivulatus resource in the Gulf of Suez is slightly overexploited (E = 0.55).}, keywords = {Siganus rivulatu,Growth,mortality,recruitment pattern,yield-per-recruit,South Sinai coast,Red Sea}, url = {https://ejabf.journals.ekb.eg/article_1728.html}, eprint = {https://ejabf.journals.ekb.eg/article_1728_cea333e524de81a2ee57e033ca67706c.pdf} } @article { author = {Fishar, Mohamed}, title = {STRUCTURE, COMPOSITION AND DISTRIBUTION OF BENTHIC MACROINVERTEBRATES IN EL-SALAM CANAL, EGYPT}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {83-93}, 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.2002.1729}, abstract = {Quantitative estimation of macro-bottom fauna in El-Salam Canal was carried out seasonaly from autumn 1999 Lo summer 2000. The macrobenthic community consists of Arthropoda, Annelida and Molhisca. Diversity of benthic fauna in the canal was low due to the shortly constructed water body and its newly established community. Besides, the average biomass in the canal was much higher than that previously recorded in different parts of River Nile. This is attributed to the heavy weight and big size of some molluscan species recorded at the end stations of the canal. Temperature and dissolved oxygen were the most important parameters controlling the distribution of macrobenthic invertebrates in the canal}, keywords = {Macrobenthic invertebrates,Distribution,composition,El-Salam Canal}, url = {https://ejabf.journals.ekb.eg/article_1729.html}, eprint = {https://ejabf.journals.ekb.eg/article_1729_e6c237c07d4ba21927ab90b57d8e16dc.pdf} } @article { author = {Ramadan, Sherif and Fishar, Mohammed and Hassaa, Sameh and Ebeid, Ahmed and Abdel Gawad, Soad}, title = {BENTHIC COMMUNITIES IN THE RIVER NILE, EGYPT III- MEIOFAUNA AT HELWAN REGION}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {95-113}, 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.2002.1730}, abstract = {The present work is the third in a series titled "Benthic communities in the River Nile, Egypt". The first dealt with aquatic stages of Insecta (Ramadan et al, 1998) and the second dealt with Mollusca (Ramadan et ai, 2000). The present work is the first to deal quantitatively with the ecology of the Egyptian Nile Meiofauna. It is hoped to be a contribution to the data base necessary for the development of the resources of the River-Nile.Monthly samples were collected from the eastern and western sides of five stations in the Nile at Helwan region (Industrial area, 30 km. South Cairo) from June 1997 to May 1998. The average standing crop of meiofauna in the whole investigated area during the period of study was 27.3 organisms/10 cm weighing 5.06 mg. fresh weight/10 cm . Nematoda was the dominant group, contributing about 66.3% of the total population density (P. D.) followed by Ostracoda (32.1%). Regarding biomass, Ostracoda occupied the first position contributing 55.5 % of the total biomass of Meiofauna, followed by Nematoda (42.9%). Summer and autumn represented the most productive seasons. The temporal average biomass followed the same trend of population density (P. D.)with some deviation. Nature of the sediment was the primary factor affecting the meiofaunal abundance. A highly significant negative correlation was revealed between the total number of macrobenthos and meiobenthos in (he sampled area. Similarity, a negative correlation was observed between the ostracod Chlamydotheca unispinosa Baird, 1862 and the macrobenthic gastropod Valvata nilotka Jickeli, 1874. The scarce occurence of harpacticoid copepods makes the Nematoda/Copepoda ratio reaches its maximum value indicateing heavy polluted area.}, keywords = {Meiofauna,Ecology,River Nile,Helwan}, url = {https://ejabf.journals.ekb.eg/article_1730.html}, eprint = {https://ejabf.journals.ekb.eg/article_1730_faf9877462404607e1f343cbccd1ec99.pdf} } @article { author = {Abou Zaid, Mohamed and Ramzy, Fattera and Knmal, Hanan and Karacl, Erian}, title = {ROTIFERS AS A POSSIBLE BIOLOGICAL CONTROL AGENT AGAINST BIOMPHALARIA ALEXANDJUNA EGGS}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {115-132}, 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.2002.1731}, abstract = {The possibility of using the naturally occurring rotifers, present inadvertently in the snail aquaria, as biological control agent against snait eggs was tested. Two species of rotifers namely Rotaria rotatoria and Philodina acuiicornis were identified, isolated and cultured intensively in controlled clean aquarium. Rotifers were fed on green algae of the genus Scenedesmus* Experiments were designed to test the ability of rotifers to destroy the snail egg masses coinciding with the abundance of rotifers in the media. The damage occurred to the snail egg masses by adult rotifers was monitored and assessed. The different stages leading to the egg masses destruction were identified. The results showed that the stage of development of embryos and the availability of rotifer's food were the two factors controlling this process.}, keywords = {Rotifers,Biomphalariaalexcmdrina,Eggs,biological control}, url = {https://ejabf.journals.ekb.eg/article_1731.html}, eprint = {https://ejabf.journals.ekb.eg/article_1731_f8069fd3a94dc4bfb0a643cb8cc7a0a0.pdf} } @article { author = {Abou Zaid, Mohamed and Hellall, Ahmed and El-Sayed, Abd-Allah and Hasan, Mohamed and El-Samara, Mohammed}, title = {EFFECTS OF DIETARY PHYTASE AND DICALCIUM PHOSPHATE ON PHOSPHORUS BIOAVAILABILITY WTmMLKTTLAPIAOREOCHROMIS NILOTICUS}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {159-185}, 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.2002.1732}, abstract = {The efficiency of supplemented diets with dicalcium phosphate' (DCP) and phytase (500 and 1000 units) replaced with dietary fish meal instead of soybean meal or full fat soybean at two replacing levels of 50% or 75% for Nile tilapia was investigated.The results of Nile tilapia (initial weight 12.10 ± 0.6 gm) revealed that the average growth performance of fish fed diet supplemented with phytase (500 and 10C0 units) had improved feed conversion ratio and specific growth rate. However, it was also shown that the replacing 50% of the fish meal with soybean meal or soybean full fat in tilapia diet were successful and had no adverse effect on growth.The diet supplemented with DCP or phytase (500 or 1000 units) significantly (PO.01) increased body protein content, body fat, body ash and calcium concentration in both vertebral column and the whole body than control. An inverse relationship between phytase dose and fat content was seen in the present results. However, fish fed the control diet or diet contained 50% of the protein from either soybean full fat or soybean meal gave the highest body protein content, crude ash and the lowest value of ether extract and gross energy content. Calcium content of whole body was higher in the fish fed the control diet than in fish fed any diet containing plant protein sources. The same trend was observed for calcium in the vertebral column.}, keywords = {Nile tilapia,Oreochromis niloticus,phosphorus,phytase,dicalchim- phosphate,phosphorus utilization and phytic acid}, url = {https://ejabf.journals.ekb.eg/article_1732.html}, eprint = {https://ejabf.journals.ekb.eg/article_1732_9d6b7c2ecaaad6dd11a92ca027fe8156.pdf} } @article { author = {Goda, Ashraf and Arafa, Sohair and Hamza, Akila and EI-Sherbiny, Mohammed}, title = {EFFECT OF DIFFERENT DIETS ON GROWTH RATE OF THE RED SWAMP CRAYFISH, PROCAMBARUS CLARKII UNDER LABORATORYCONDITIONS}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {187-198}, 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.2002.1733}, abstract = {The growth response of juvenile crayfish , Procambarus clar kii to different fresh diets available from agriculture and freshwater ecosystem was examined under controlled conditions . These diets were fresh sweet potato tubers, Ipomaea batatas, fresh leaves of lettuce, Lactuca sativa , fresh fish meat from mosquitofish, Gambusia qfflniS) and all possible combinations of those ingredients for about two months. After 40 days, the results showed a significantly higher growth rate (p < 0,05 ) in both length and weight in crayfish fed with fresh fish meat The differences were not significant between other treatments, but those which included fish meat induced consistently higher growth rates than those based only on plant ingredients . These results suggest that a dietary supplement based on animal source might significantly improve the growth rate of the crayfish, However, it was not clear whether this was because of protein or lipid components and composition of mosquito fish meat.}, keywords = {Procambarus clarkii,growth rate,natural diets}, url = {https://ejabf.journals.ekb.eg/article_1733.html}, eprint = {https://ejabf.journals.ekb.eg/article_1733_d1e9c25b8e60d3ce30e657c84a582ede.pdf} } @article { author = {Goda, Ashraf}, title = {APPARENT PROTEIN DIGESTIBILITY AND AMINO ACID AVAILABILITIES OF DIETARY FISH MEAL, SOYBEAN MEAL AND FULL FAT SOYBEAN IN THE NILE TILAPIA OREOCHROMIS NILOTICUS FINGERLINGS.}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, pages = {199-215}, 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.2002.1734}, abstract = {This study was conducted to evaluate the apparent protein digestibility and amino acid availabilities of fish meal replaced with soybean meal and full fat soybean at two levels of 50% and 75% in the.Nile tiiapia fingerlings.The carcass protein, lipid and gross energy gain were improved when dietary fish meal was replaced with soybean meal or full fat soybean at the levels of 50% than 75% .Diets containing either soybean meal (50%) or full fat soybean (50%) had the highest significant (P&0.01) value for protein digestibility coefficient than the other treatments.The over all pattern of apparent amino acids, availability corresponds to that of protein digestibility -The availability of threonine from fish meal and that of methionine of soybean meal at 75% replacement level offish meal were the lowest in the respective protein sources. Cystine availabilities of fish meal and full fat soybean at 75% replacement level were low compared with other amino acids.This study demonstrates that soybean meal or full fat soybean may used as a best source of protein in combination with fish meal in the diet for Nile tiiapia at the level up to 50% of total dietary protein, in order to ensure a favorable essential amino acid profile which closely meets the requirements.}, keywords = {Apparent protein digestibility,amino acid availabilities,fish meal,soybean meal,full fat soybean Nile tiiapia}, url = {https://ejabf.journals.ekb.eg/article_1734.html}, eprint = {https://ejabf.journals.ekb.eg/article_1734_fb8be6e23fde8934e4a4129d65e43ed9.pdf} } @article { author = {}, title = {تأثير حرکه المياه ومخلفات الصرف علي ديناميکيه الهائمات الحيوانيه في الميناء الغربي بالأسکندريه}, journal = {Egyptian Journal of Aquatic Biology and Fisheries}, volume = {6}, number = {1}, 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.2002.1735}, abstract = {}, keywords = {}, url = {https://ejabf.journals.ekb.eg/article_1735.html}, eprint = {https://ejabf.journals.ekb.eg/article_1735_e3b81452fcb8824ef9b6fd9e2709cb53.pdf} }