2024-03-29T01:41:11Z
https://ejabf.journals.ekb.eg/?_action=export&rf=summon&issue=365
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
GROWTH RESPONSE OF NILE TILAPIA FINGERLINGS (OREOCHROMIS NILOTICUS) FED DIETS CONTAINING DIFFERENT LEVELS OF CLOVE OIL
Magdy
Gaber
A 16 week feeding experiment was conducted in fiberglass tanks with Nile tilapia ( Oreochromis niloticus) fingerlings of average weight ( 23.2 + 0.1 g ) to examine the effect of supplemental clove oil in prepared diet on its growth . Four isonitrogenous (343+ 0.6 % crude protein) and isocaloric ( 4720 + 91 Kcal/kg gross energy ) diets were formulated according to a high quality commercial tilapia diet, containing 10 % fish meal, 20 % meat meal and 24 % soybean meal. Diets B, C, D was supplemented with various percentage of clove oil (4, 8, 12) mg/100 g diets respectively- After 16 weeks, the results showed that individual fish weight, length , feed conversion ratio , feed efficiency ratio , protein effeciency ratio and feed intake were significantly different ( p< 0.01 ) among treatments and diet (C) showed high value with clove oil supplemented with 8mg/100g diet . Fish flesh composition was also significantly different (pO.OJ) and fish fed on diet (C) had high value of protein and fat content* This suggests that clove oil appears to meat criteria used as antioxidant and stimulant for fish growth.
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2000
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https://ejabf.journals.ekb.eg/article_1637_2928d70a0042a62a4eb507e874380f9b.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
CHEMICAL COMPOSITION OF FRESHWATER CRAYFISH {PROCAMBARUS CLARKII) AND ITS NUTRITIVE VALUE
Mohamed
Mona
Naglaa
Geasa
Khadiga
Sharshar
Emam
Morsy.
The chemical composition of flesh and carapace of the freshwater crayfish (Procambarus clarkii) was determined. The relationship between body weight, total length, yield of meat and carapace was established.Average chemical composition of the flesh of male was determined to be 7% moisture, 3.1% fat, 10-2% ash, 17.5% carbohydrate, 62.2% protein, calcium 2843 mg/lOOg, phosphorus 343.6 mg/lOOg; iron 11.7mg/100g, zinc 15.1mg/100g, Selenium 0.9 mg/ loog. The present study reveals that the higher protein content in muscle of males may be due to its faster growth rate than females. Moreover, it was indicated that the present investigated crayfish contains more phosphorus than fish and the carapace contains a higher values of iron, fat and carbohydrate than muscles.Thus, it is safely to conclude that the flesh of P. clarkii is recommended to stand as a source of animal protein for Egyptian citizens and its carapace can be used as a forage for animals,
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2000
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https://ejabf.journals.ekb.eg/article_1638_1216e61cdc53c6f27dc52845250f1164.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
TREATMENT OF CADMIUM, COPPER, ZINC AND IRON IN WASTEWATER BY THE HORNWORT CERATOPHYLLUM DEMERSUM
Mary
Ghobrial
The hornwort, Ceratophyllum demersurn L., was investigated as a potential biological filter for metal removal from domestic effluent. The plants were grown on media with a series of sewage dilutions. The waste water concentration of 2:5 was optimum for plant harvest realizing maximum uptake and accumulation of Cd and Cu within 9 days treatment. Their contents were, respectively, 2.9 and 3.9 folds higher than that of the control plants.rZinc was more readily accumulated with an increase of 2.2-75.5 times the initial content in the plant. Iron was greatest in plants grown on 4:5 waste dilution in 7 days treatment. Manganese ion increased slightly by the first waste treatment but was supressed leakage by the successive runs, while K+ and Na+ ions loss was less pronounced at the beginning of treatment followed by considerable increase in K+ content. Growth rates did not exceed 4.0g g"1 fresh weight d"1 at low waste dilutions. Ceratophyllum, may prove useful in the detoxification of domestic effluents, it has a capacity to retain heavy metals within its tissues
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2000
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46
https://ejabf.journals.ekb.eg/article_1639_7b1145da6b7f6c333d4934afe61fb971.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
RELATIVE IMPORTANCE OF THE SIZE-FRACTIONATED PHYTOPLANKTON POPULATION IN TEMPERATE WATERS, ALEXANDRIA (EGYPT)
Wagdy
Labib
Samia
Kamel
The composition and the contribution of the 4 different cell size classes (>100, 50-100, 20-50 and 100 \im9 which seems a phosphate dependent. Salinity and silicate concentrations seem affecting the variability of the smaller size classes.
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2000
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47
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https://ejabf.journals.ekb.eg/article_1640_e20c6a51bb1af9c3c38cb61813acc826.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
THE EFFECTS OF FEEDING METHODS AND REGIMES ON PERFORMANCE OF HYBRID TILAPIA, OREOCHROMIS NILOTICUS XO.A UREVS, REARED IN CAGES.
Mohamed
Essa
In order to study the optimum feeding methods and frequency in hybrid tilapia, Oreochromis niloticus (female) x O. aureus (male), 2400 fingerlings were divided into four groups in duplicated floating net-cages (2m3 each). The same feed ration (27.9% crude protein) as percentage of biomass was given to all experimental groups but with different feeding methods (automatic on demand feeding or manual) and frequencies (2,4 and 6 times daily). The results indicated that: 1) fish fed from demand feeders (8 hours daily) gained more weight, showed better feed utilization, and higher survival rate and production than fish fed manually, and 2) the higher feeding frequencies between 4 and 6 times daily resulted in superior weight and length gains, conditions factor, feed utilization, survival and production as well as a favorable influence on lipid and protein assimilation, compared to fish fed two times daily.
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2000
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https://ejabf.journals.ekb.eg/article_1641_45973aa34b32c72c1b6cb0fd9ced60e2.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
COMPARATIVE STUDY OF SOLUBLE GONAD PROTEIN FOR BOTH SEXES OF SIGANUS RIVUIATUS (FAMILY: SIGANIDAE) IN RELATION TO MATURITY STAGES BY ISOELECTRIC FOCUSING
Samia
Moharram
Soluble gonad protein for both sexes of Siganus rivulatus was analysed by isoelectric focusing in seven maturity stages. Sex- specific electrophoretic and isoelectric focusing patterns were found. More protein fractions are identified for stage II of both sexes than for die other stages. The total number of protein bands for female was greater than those of male. In female, spawning stage has the maximum number (4) of specific band while in male the maximum ones (6) were separated from stage (HI). The number of common bands in both female and male was (3 & 2) respectively. Clear differences in protein patterns of the seven stages for both sexes can be used to characterize the breeding season.
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2000
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https://ejabf.journals.ekb.eg/article_1642_fa1504f441e94bd04f03f57bab09c7b3.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
DISTRIBUTION OF SOME ELEMENTS IN THE CUTTLE FISH SEPIA OFFICINALIS SHELLS AS INDICATORS FOR MONITORING HEAVY METAL WATER POLLUTION
Naglaa
Geasa
The chemical composition, minor and major elements concentration and microstructure of juvenile and adult shells of Sepia officinalis were investigated by using electron X-rays and scanning electron microscope. The results generally showed significantly higher metal concentration in the juvenile shell than in the adult one, except calcium and aluminum. However, the highest accumulation was for copper, lead, and cadmium. The relationships between metal concentration and shell length, weight, and position were determined.However, no relationships between heavy metals pollution and microstructure of the shells of the investigated cephalopod were observed.
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2000
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https://ejabf.journals.ekb.eg/article_1643_dd82563fb95e3076696c27a2de4c9d25.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
IMPACT OF UREA FERTILIZER ON GORWTH AND BIOCHEMICAL COMPOSITION OF SOME AQUATIC PLANTS
Mary
Ghobrial
This study has been conducted to evaluate the effect of varying concentrations of urea fertilizer on the growth, protein, fat and water content of five aquatic plants, in aquaculture system. These plants were cultured in glass basins outside the laboratory in tap water and they received doubling doses of urea fertilizer (1, 2, 4, 6, 8 and 16g) per 30 L medium at three days intervals. The media were changed before receiving the following inoculum and the excess yields were harvested. Potamogeton crispus, P. pectinatm and Ceratophyllum demersum eould withstand urea concentrations up to 533 mg/L, while Polygonum amphibium could survive at 133 mg/L, but Azotta filiculoides died at the same concentration. Crude protein increased, generally during the experiment, in all test plants except in P. crispus that showed wide fluctuations. Fat content decreased in all plants by the end of the experiments, but water content fluctuated slightly between increases and decreases during the experiment.
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2000
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138
https://ejabf.journals.ekb.eg/article_1644_283cc528123cb260305d703fea5420f2.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
EFFECT OF SALINITY ON GONAD DEVELOPMENT IN DIPLODUS VULGAR1S (FAMILY: SPARIDAE) DURING THE BREEDING SEASON
Samia
Moharram
Morphological and histological studies demonstrated that salinity affects gonadal development of Diplodus vulgaris* Fishes exposed to salinity 25%o were characterized by reduction in the gonad size, GSI values and the testes seemed to be atrophied. Degeneration of both spermatogoma and oocytes were observed at this level of salinity. At 16 %o salinity, the gonads were slightly reduced in size, early ripening of males and early sex reversal were observed. By increasing salinity to 4Q%o, the gonad weight and GSI values were decreased. Inhibition of spermatogenesis in males, collapse of the oocytes and marked shrinkag in the nucleus diameter were detected. The ovaries of females showed some types of abnormalities: development of small vacuoles all over the cytoplasm which was not homogenous. It was observed that exposure to salinity 48%o caused the most deleterious effect on the gonads. Hypertrophy followed by degeneration of spermatogonia and deformation of seminiferous lobules, cessation of cell division and deformation of the oocytes were observed.
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2000
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139
160
https://ejabf.journals.ekb.eg/article_1645_e2b4ca0b5606303a8bc23bbcc5cc6915.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
EFFECT OF POLLUTION ON THE WATER QUALITY OF THE GULF OF SUEZ
Mohamed
Hamed
Tarek
Said
Water samples were collected from the Gulf of Suez during July, 1998. Nutrient salts (ammonia, nitrite, nitrate and phosphate) and chlorophyll-a were measured spectrophotometrically, while the concentrations of dissolved hydrocarbon fractions were measured spectrofluorometrically. The results show that the maximum concentration of heavy petroleum fractions is - 9.3 |ig/L recorded at Ras Shukeir, where high oil fields activities are centered. Nutrient salts were relatively high at the northern part of the Gulf of Suez (Suez Bay). Their concentrations were 4.14, 0.45, 4.6 and 1.04 ng at/L for NH/, NO2", NO3" and PO43" respectively. Chlorophyll-a and phytoplankton biomass were ranging between 0.12-2.54 mg/m3 and 9.0-190.5 ngC/L respectively. The present study revealed that the Suez Bay area can be considered as eutrophic region. This is related to sewage and/or industrial waste discharges along the western coast of the Bay. The rest of the Gulf area is considered as oligotrophic region. Also the results show that nitrogen is the limitng factor for phytoplankton growth in the Gulf of Suez.
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2000
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161
178
https://ejabf.journals.ekb.eg/article_1646_a480bf2065ad1828623f21761a717544.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
BIODIVERSITY AND DISTRIBUTION OF EPIPHYTES COMMUNITY ASSOCIATED WITH PNEUMATOPHORES OF THE MANGAL AVICENNIA MARINA (FORSSK.) VIERH, ALONG EGYPTIAN RED SEA COAST
Ali
Gab-Alla
Pneumatophores of the mangrove trees Avicennia marina along the Egyptian Red Sea coast were investigated, to measure the spatial variability in their epiphytic community. Forty eight species of epiphytes (36 algae and 12 invertebrates) were recorded all over the investigated sites. With the resulting data being subjected to comparison indices (Jaccard), the more adjacent sites were the more similar in their biotic contents. This spatial variability is not a geographical trend but it could be attributed to the abiotic and biotic components characteristic to each site.
2000
01
01
179
196
https://ejabf.journals.ekb.eg/article_1647_2a76b8d47c0e5fa6f3716f3d93d602f7.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
SPATIAL AND TEMPORAL VARIATIONS OF PLANKTONIC CRUSTACEA FROM WADI EL RAYAN LAKES, El FAYOUM WESTERN DESERT, EGYPT
Adel
A. Mageed
Wadi El Rayan Lakes lie in Wadi El Rayan Depression, southwest of Cairo in the western desert of Egypt. Zooplankton samples were collected monthly during twelve cruises from February 1996 to January 1997. Crustacea constituted 70% of the total zooplankton organisms which were represented by Cladocera, Copepoda, and Ostracoda (27.74%, 7L79%, and 0.47% respectively).The Cladocera was represented by nine species dominated by Diaphanosoma excisum, though all of the cladoceran species were previously reported from Wadi El Rayan Lakes except Macrothrix laticomis. The Copepoda was represented by five species where Thermocyclops neglectus was the most dominating one (60% of total adult copepods). The Ostracoda was represented by only Cyprideis torosa. The first lake harboured the maximum numbers of Crustacea whereas their lowest numbers were recorded at the drain and the second lake. The peak of crustacean flourishing was during autumn.
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2000
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222
https://ejabf.journals.ekb.eg/article_1648_b4d8f78b2e5b167d9c28b599b0b03b84.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
DIURNAL AND NOCTURNAL VERTICAL MIGRATION OF ZOOPLANKTON IN WADI EL RAYAN LAKES (EL FAYOUM, EGYPT)
Adel
A. Mageed
Samples of zooplankton were collected at two-hour intervals during the twenty-four hours cycle of 26-27 July 1997. The samples were collected from fixed depths of the water column at a fixed station at the first lake of Wadi El Rayan Lakes (El Fayoum, Egypt).The results obtained indicate that large number of organisms in the epilimnion characterized the general trend of zooplankton vertical migratioa Each group had a special style of diel vertical migration. Crustacean organisms were correlated negatively with temperature and light. They migrated downward during daytime and upward during night Rotifera showed a reverse trend with a significant positive correlation with light intensity.
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2000
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238
https://ejabf.journals.ekb.eg/article_1649_084277c738a3d090f2fde33fcc3294b8.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
FOOD HABITS AND ULTRASTRUCTURE OF GASTRIC MILL OF THE GRAPSID CRAB, METOPOGRAPSUS MESSOR (FORSKAL, 1775) FROM THE RED SEA, EGYPT.
Awaad
El-Sayed
Fatma
Fouda
Ali
El-Meaddawy
During the present study, the stomach contents of a medium-sized grapsid crab, Metopograpsus messor (Grapsidae, Brachyura) inhabiting different habitats (rocky, sandy-rock, and mangrove swamps) of the Red Sea (southern Aqaba Gulf) were examined by both frequency occurrence and percentage points. The results show that this species is opportunistic omnivore, with general food items consisting of algae (brown, red, green and blue green), benthic animals dominated by crustacean copepods, isopods, amphipods and other crustaceans,. in addition to foraminiferans, polychaetes and animal eggs, with few fragments of hydroids, bryzoans as well as organic debris and unidentified items. Higher plants including leaves and adventious roots of mangroves and seagrass leaves were also reported among stomach contents. Moreover, sediments were represented by considerable amounts at both different habitats and seasons. The types of foods were significantly different through various habitats and seasons.The gastric mill of the crab, which deals mainly with mechanical digestion was investigated by both light and scanning electron microscopes. It appeared as a very complex structure, composed of 6ossicles arising as internal thickening and calcification of dorsal and postero-lateral walls of the cardiac stomach. These ossicles are pterocardiac, propyloric, exopyloric, urocardiac, zygocardiac and lateral ossicles. The first three ossicles are very simple and used mainly for articulation; while the latter ones are greatly modified with conspicuous enlargement, forming a mammalian-like teeth in zygocardiac ossicle, simple ridges and denticles in urocardiac one, or with many grooves and plates provided with dense hairs and accessory spines as in lateral ossicle. All these ossicles are well articulated together, working in a regular pattern adapted to chewing, grinding, and processing of ingested food,
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2000
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https://ejabf.journals.ekb.eg/article_1650_4d15734253d4f69c388332dc3bfd2b3a.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
THE MALE REPRODUCTIVE SYSTEM OF THE REEF SQUID SEPIOTEUTHIS LESSONIANA LESSON, 1830 (MOLLUSCA: CEPHALOPODA) FROM THE GULF OF SUEZ
Waheed
Emam
Reda
Aly
Sepioteuthis lessoniana Lesson, 1830, represents the most common species of squids in the Red Sea. It was chosen for a detailed study of the macro- and microscopic anatomy of its male reproductive system with special reference to the structure of its spermatophores and the method of their formation.The male reproductive system is differentiated into a single testis and a gonoduct which consists of a vas deferens, a complex spermatophoric organ, a spermatophoric duct and a spermatophoric sac that ends with a muscular conducting tube. The testis is formed of a large number of closely compact seminiferous tubules containing different stages of spermatogenesis. The spermatophoric organ is composed of six glands: mucilagenous I & n, ejaculatory appartaus, middle and outer tunic and accessory gland with its appendix. The structure of each of these glands was demonstrated and discussed.The spermatophore of S. lessoniana is a minute structure that consists of a spermatophoric cord and an ejaculatory apparatus connected together through the connective region. The structure of different parts of the spermatophore and the method of their formation were studied and discussed.
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2000
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265
295
https://ejabf.journals.ekb.eg/article_1651_561273e58a7668458a6cf6fd0d9a8e46.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2000
4
1
استجابه نمو اسماک البلطي النيلي علي علائق تحتوي مستويات مختلفه من زيت القرنفل
2000
01
01
1
15
https://ejabf.journals.ekb.eg/article_1659_7d83a820d7e6f1291a93304803a1bdd5.pdf