2024-03-28T22:38:25Z
https://ejabf.journals.ekb.eg/?_action=export&rf=summon&issue=388
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
POPULATION DYNAMICS OF THE CUTTLEFISH SEPIA DOLLFUSI (ADAM, 1941) IN THE GULF OF SUEZ, EGYPT
Sahar
Mchanna
Anial
Amin
Basic population parameters of the cuttlefish Sepia dollfusi. in the Gulf of Suez were described from samples of commercial landing made between September 2002 and May 2003. A total of 600 5. dollfusi with mantle lengths ranged from 45 to 147 mm were studied. Age and growth were estimated using progression analysis model by applying Bhattacharya method. There were no significant differences in population parameters between sexes. The theoretical maximum length Lr. = 169 mm and the growth coefficient K = 0.91/ year. Total, natural and fishing mortalities were 3.57, 1.07 and 2.5 per year respectively. The exploitation ratio (E =0.7) suggests that the fishing pressure on S. dollfusi in the Gulf of Suez is high. Relative yield per recruit and relative biomass per recruit analysis showed that S. dollfusi stock in the Gulf df Suez in a situation of over-fishing. For the management purposes, the current exploitation rate should be reduced by about 51% to maintain a sufficient spawning biomass and the present length at first capture should be raised to about 86 mm ML.
Sepia JoI!?u.\i. cephalopods
age and growth
mortality and exploitation rales
Recruitment
gear selectivity. management
Stock assessment
2005
01
01
1
14
https://ejabf.journals.ekb.eg/article_1814_386ef2d2bee80882dbd39ea0db65585e.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
BIOLOGICAL ASPECTS OF THE DIGESTIVE SYSTEM OF CAELATURA TERETIUSCULA (BIVALVIA: UNIONIDAE)
Mohamed
Gabri
AbeerA
Fawaz
Abd El-Halim
Saad
Reda
Aly
The digestive system of the clam Caelatura lerelhtscvla consists of the mouth, oesophagus, complicated stomach, combined style sac and mid gut. intestine, rectum and digestive gland.The combined mid gut and style sac are differentiated into four regions. The crystalline style, is lodged inside the style sac and projected into the lumen of the stomach. There are three groups of digestive gland ducts that open into the stomach.The microscopic examination of the interior surface of the digestive tract is formed of a single layer of columnar cells provided with cilia, varying in their length and density. These cells have oval nuclei which occupy variable levels. There are some club-shaped secretory cells distributed between the columnar ones. They acquired deep magenta colour with PAS. The digestive gland tubules are lined with two main eel! types: the digestive and secretory cells. Its ducr is lined bv a laver of ciliated columnar cells.V If Histochemically, the digestive cells exhibited a moderate colouration with PAS and mercuric bromophenol blue. However, the secretory ones displayed a dark magenta and blue color with PAS and bromophenol respectively.
DIGESTIVE SYSTEM
Caelatura teretiuscula
amalomy . histology
2005
01
01
15
40
https://ejabf.journals.ekb.eg/article_1815_9f0ed6abbf7d8c2a6916d4eda9dd9105.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
DISTRIBUTION OF SOME HEAVY METALS IN TISSUES OF OREOCHROM1S SILOTICUS* TILAP1A ZJLL11 AND CLARIAS LAZERA FROM ABU ZA'BAAL LAKES AND THEIR IMPACTS ON SOME BIOCHEMICAL PARAMETERS AND ON THE HISTOLOGICAL STRUCTURES OF SOME ORGANS
Fatma
Mohamed
Nahed
Gad
Abu Za'baal Lakes are man-made lakes, formed by the fracture apd extract of rocks. The lakes, as other inland closed basins. receive their water from the ground and seepage waters. They consist of three lakes and another filling-phase lake. In the present study, the concentrations of some heavy metals {Fe. Zn. Mn. Pb. Cu and Cd) in water and organs (muscles, gills, liver and kidney) of O. niloticus. T, zillii and C. iazera collected from Abu Za'baai Lakes were measured during winter. 2004. The effects of the tested metals on the total protein and total lipid contents in the muscle and liver and on the histological structures of the gills. liver and kidneys of fish were studied.The present results showed that the levels of Fe. Zn. Mn. Pb. Cu and Cd in the water of Abu Za'baal lakes ranged between 3.22-6.0L 0.21-1.50. 0.67-1.64. 0.62-1.67. 0.13-0.20 and 0.03-0.06 mc/L respectively. The highest \ allies of metals were reported in the third lake, while their lowest values were in the first one.It was found that the metals were accumulated in different organs of the studied fish b> various levels. The concentration of the tested metals in different organs of (I niloticus and T zillii followed a sequence of: Fe. /n. Mn. Pb and Cd in muscles < gills < liver < kidnevs. however. Cu in muscles • uills < kidnevs < liver for (). nilolicus and in gills ■■ muscles ■ kidneys < liver for T. zillii. On the other hand, in C lazcra. Fe and Cu were in muscles < gills < kidneys < liver. Zn. Pb and Cd in muscles •' gills < liver --' kidneys and Mn in muscles < li\er - kidne\> gills. In general, the concentrations ol the tested r^.iab: -o. drfforcnt organs of the studied fish were in the following oider. F~ > Zn > Pb > Mn > Cu > Cd. Zn,- Cu and Cd concentrations in the fish muscles (edible parts) (except Cd in the muscles of T. zillii) were within the maximum permissible limit. The concentrations of Fe and Pb in the muscles exceeded the permissible limit.The total protein content in the muscle and liver of O. niloticus. T, zillii and C. lazera showed non significant decrease. Otherwise. the muscle lipid consent snowed highly significant increases in O. niloticus and T. zillii and non significant decrease in C. lazera. In contrast, the liver lipid content rhowed non significant increase in O. niloticus and T. zillii and a highly significant increase in C lazera.Several histopathological alterations were observed in the gills, liver and kidneys of the studied fish collected from Abu Za'baal Lakes.
Heavy metals
accumulation. proteinsJipids* histopatholog\ Aheochromis niloficiis
Tilapig zillii
Clarias lazcra. Abu Za'baal Lakes
2005
01
01
41
80
https://ejabf.journals.ekb.eg/article_1816_51eb7a6460b8dbbddcadf7b46724dfa6.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
BIOCHEMICAL AND HISTOPATHOLOGICAL STUDIES ON THE MUSCLES OF THE NILE TILAPIA (OREOCHROMIS NILOTICUS) IN EGYPT
Sabry
El-Serafy
Seham
Ibrahim
Soaad
Mahmoud
Biochemical contents in the muscle of Oreochromis niloticus were determined in fish specimens collected from El-Kanater, Benha, Zefta and Talkha stations. Analysis revealed that the water content in muscles was higher in immature than mature fish. The maximum values of protein content in fish flesh were recorded during spring at Benha and Zefta stations. Seasonal variations in the amount of protein, fat. carbohydrate water and ash were observed. The fat in fish muscles was fairly high in winter and early spring in adult specimens, i.e.. during the pre-spawning months, then it dropped after the breeding season. A direct relationship between fat and protein was found. The muscle carbohydrate was correlated to feeding and spawning activity. High energy values were found throughout the prespawning period.Heavy metals concentrations were detected in the muscles of O.niloticus and found to follow the order: Fe > Pb > Cu > Zn.The histopathological study of fish muscles showed marked signs of haemorrhage and hemolysis.
River Nile
tilapia. heavy metals
Biochemical analysis
histopathology
2005
01
01
81
96
https://ejabf.journals.ekb.eg/article_1817_ea674af2627f18dc92dd0ed632ccfd38.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
HEAVY METALS AND MACRONUTRIENTS CONCENTRATION IN OREOCHROMIS NJLOTICUS AND TILAPIA ZILLIIFISH SPECIES INHABITING SOME EGYPTIAN LAKES AND EL-SALAM CANAL
Amaal
Abdel-Satar
Amal
Yacoub
The present study was initiated to assess the levels of Fe, Mn, Zn. Cu. Ni. Co. Pb and Cd together with Na, K, Ca and Mg in liver and muscle of Tilapia zillii from three different aquatic ecosystems namely. Lake Manzaiah (Brackish water). Lake Qarun (Saline water) and El-Salam Canal (fresh water) and Oreochromis niloticus from Lake Manzaiah and El-Salam Canal throughout four seasons (1999-2H00). The present results revealed that liver has higher tendency to accumulate Fe and Cu more than the other studied heavy metals for O. niloticus and T. zillii in different studied sites. Zn followed Fe in the accumulation abundance in muscle tissues of the two studied species and Cd was the lowest one. The fluctuation of metal concentrations in muscle tissues for O. niloticus and T. zillii exhibited the following descending orderFe>Zn>Mn=Cu-Ni=Co=Pb>Cd. while the abundance order of the same metals in liver tissues was: Fe>Cu>Zn>Mn>Ni>Co= Pb>Cd.
Heavy metals
Macronutrients
Oreochromis niloticus. Tilapia zillii. Lake Manzaiah
Lake Qarun. El-Salam Canal
2005
01
01
97
116
https://ejabf.journals.ekb.eg/article_1818_ad148d06f0a206c50bf1037b9925eef8.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
FISHERY ASSESSMENT OF THE RABBITFISH SIGASCS CA.\ALICULATL'S FROM THE ARABIAN GULF, SAUDI ARABIA
Adel
Tharwat
This study dealt with the population dynamics of the rabbitfish Siganus canal iculat us. one of the economically important fish o( the Arabian Gulf fisheries in Saudi Arabia. The length ;u recruitment (Lr) was 15 cm (total length for both sexes), its calculated weight about 57 g. and the corresponding age at recruitment (tr) was estimated from Von Bertalanffy equation as O.Sfi year for both sexes. The length at first capture (Lc) was 20.0. 21.0. and 20.5 cm for males, females and combined sexes, respectively. Converting these lengths (Lc) to age at first capture (tc) gave t^ about 1.57, 1.66 and L60 years for males, females and combined sexes. respectively. Generally, females of & canaUculams had larger size and heavier body weights than males. The monthly absolute condition factor (Kc) and relative condition factor (Ku) of S. canaliculaius was studied. The maximum age of S, canaliculaws was found to be five years in western Arabian Gulf at Saudi Arabia. The young fishes that belong to ages 1-2 years constituted about 60.72, 56.50 % and 58.52 %. while older fishes that belong to ages 3-5 years constituted about 39.28. 43.50 and 41.48 % for males. females and combined sexes, respectively. The computed total mortality coefficients (Z) were 1.48, 1.53 and 1.50 per year and the total mortality rates (A) of 77. 78 and 78 % with survival rates of 23. 22 and 22 % for adult males, females and combined sexes in the fish population. The natural mortality coefficients (M) of S. canaliculatus were found to be 0.73. 0.76 and 0.75 per year for males, females and combined sexes, respectively. The fishing mortality coefficients (F) reached 0.75. 0.77 and 0.75 per year for males, females and combined sexes, respectively. The exploitation ratio was discussed in order to help fisheries management in the Arabian Gulf.
Rabbit fish. Siganus canulicttlaius* population dynamics. fisheries. Arabian Gulf
2005
01
01
117
136
https://ejabf.journals.ekb.eg/article_1819_1e841fb02e9fe5f0a2713133d782258a.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
QUANTITATIVE AND QUALITATIVE STUDIES ON THE BACTERIAL MICROFLORA OF SOME FISH FARMS IN EL- FAYOUM GOVERNORATE, EGYPT
Shawky
Sabac
Microbial assessment was carried out monthly during 2003 at four fish farms, in addition to Dayer El-Berka Drain (the source of water for the farms) in El-Fayoum. This study investigated the bacterial indicators of pollution, the bacterial bioniass and the bacteria associated with nitrogen transformations in the aquatic ecosystem of the fish farms.The data showed that the temperature ranged between 16.6 llC and 33.6 °C and the pH values were at the alkaline side (7.43- 8.91}. On the other hand, the concentrations of ammonia, nitrite and nitrate were in the range of 0.2- 2.26 mg/L 2.7- 96 jig/I and 26.3- 300.3 (ig/1, respectively.The bacteriological analyses revealed that the variation in the total viable bacterial counts in the farms was directly related to the type of diet used in fish nutrition. The bacterial counts, in the fish farms, varied from 1.8 x 1012 to 40.8 * 1012 cfu /ml and from 1.4 * 1012 to 151012 cfu /ml at 22 °C and 37 °C respectively. On the other hand, their counts in Dayer Et-Berka Drain fluctuated between 2.8 * 1012 and 29 * 1012 cfu/ml and between 4 x 1012 and 30 * 1012 cfu /ml at 22 °C and 37°C, respectively. Whereas the bacterio-plankton biomass ranged between 496 * 10 and 1160 * 10J mg C m"3. The present data showed that the bacterial flora was markedly affected by water temperature. Bacteriological examination showed that the highest counts of nitrogen cycle bacteria recorded in Dayer El-Berka Drain was high compared with the fish ponds.With regard to the bacterial pollution, the results revealed that the numbers of faecal indicator bacteria, in Dayer El-Berka Drain exceeded the Egyptian standards (1996) and the European Commission (EC) guide standards (1998). Thus, for public health concern, the drainage water should be treated before being used in aquaculture.
bacterial bioniass. faecal indicator bacteria
N-evcle bacteria
fish farms
EI-Fayoum Governorate
2005
01
01
137
158
https://ejabf.journals.ekb.eg/article_1820_b044482a02858a8249bf623b6798231b.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
ENERGY CONTENT OF THE GONADS AND SOMATIC TISSUES OF NILE TILAP1A OREOCHROMISMLOTICLS{L.) DL RING THE SPAWNING SEASON
Mariam
Sharuf
Nile tilapia Oreochromis mlolicus were collected from a brackish pond near Lake Timsah (Suez Canal); the energy content of the somatic tissues (muscles) and gonads has been determined during the spawning-season (March-June 2003) using the wet dichroinate oxidation method. The gonadal relative energy content (Jmg"1) of the gonad of both males and females exhibited the same pattern of increasing throughout the maturity staees. There wer* no marked differences in the relative energy content of the fish muscles. The absolute energy content (J) of the somatic tissues of males and females increased gradually with the increase of length (cm).
Energy content. Maturity stages
Reproduction
fish
(hx'ochromis mfoticus. Lake Timsah
2005
01
01
159
169
https://ejabf.journals.ekb.eg/article_1821_90113ccd2d3d65f27be82dda3e4b08d7.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
REPRODUCTIVE BIOLOGY OF THE MANTIS SHRIMP ERUGOSOUILLA MASSAVENSIS FROM PORT SAID, EGYPT.
Wafaa
Sallani
The reproductive biology of the mantis shrimp ErugosqviUa massavensis inhabiting the Mediterranean Sea at Port Said was studied and compared to previous studies. A single reproductive period was observed for females that lasted from February to August. This was followed by a well-defined resting phase from September to November, The ratio of males and females was nearly equivalent (0.95 female: 1 male). Females outnumbered males in all months except during the reproductive season. Gonad indices as well as the number of females with developed cement glands were relatively high during the spawning season. The body size at which 50% of females were sexually mature was much smaller than that reported in a previous study (22.6 mm CL and 25.7mm CL respectively). Females responded to extensive exploitation by reaching maturity at a smaller size and by increasing fecundity. The mantis shrimp population in Port Said appears so far seriously heavily exploited and needs urgent management regulations for the maintenance of that valuable fishery resource.
Reproduction
Mantis shrimp
ErugosquiUcu Egypt
2005
01
01
171
183
https://ejabf.journals.ekb.eg/article_1822_7356d5ef0662a13d63f2729032378d6b.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
IMMl N'OHISTOPATHOLOCfCAL EFFECTS OF FENTHION TOXICITY ON THE COMMON CARP \CYPRIM'S CARPIO)
Hekmat
Tantauy
Mariam
Sharaf
Ismail
Abd Elnnbi
Hend
Tag
Fenthion is an organophosphate pesticide, widely used all over the world as a broad-spectrum insecticide for the protection of numerous crops especially rice. Due to these agricultural activities Fenthion has repeatedly been detected in surface waters and soil. Thus. Fenthion is among the most toxic pesticides for aquatic life especially fish. This study had investigated die toxic effect of Fenthion on some immunological and histopathological parameters. Fish were exposed to concentrations of 0.00 (control). 0.S3 ppm and 2.1 ppm for 96 hours. The histopathological alterations for lymphoid and non-lymphoid organs, as compared to the control group. included hemosiderosis and atrophy in spleen and pronephrous. In gills, hemorrhage, progressive degeneration and lymphocj le infiltration were reported: in liver and pancreas atrophy has been shown in addition to excessive zvmosen granules secretion in pancreas. The kidney trunk showed glomerular and tubular atrophy and lymphocyte inilltration. For the alterations of plasma immunoglobulin level. Fenthion at all concentrations suppressed plasma IgM level (P< 0.05). So it can be concluded that Fenthion causes adverse effects on immunological and histopathological parameters of exposed fish.
Cyprinus carpi, pesticide: fenthion
histopathology
immunity
2005
01
01
185
202
https://ejabf.journals.ekb.eg/article_1823_67c4e2d547fabc93470ea437aa516e1a.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
EFFECT OF HEAVY METALS ACCUMULATION ON ENZYME ACTIVITY AND HISTOLOGY IN LIVER OF SOME NILE FISH IN EGYPT
Seham
Ibrahim
Soad
Mahmoud
Daring spring. 2004. samples of Tilapia zillii, Clarias gar&pinus and Mugil cephalus were collected from Nile water at El- Kanater region in order to study the effect of heavy metals (Fe. Mm Zn . Cu .Pb and Cd) accumulation on the enzyme (GOT & GPT) activity as well as livers tissues of the three fish species. The results showed that Fe. Mn. Zm Cu. Pb and Cd accumulation in the livers of the above three fish species ranged between 802.626 -1021.97. 9.731 - 26.061 and 123,656- 166.364.34.144-116.364. 27.957 - 89.394 . 16.061 -42.742 ug/g dry wt respectively.The main observed lesions were (1) dilation and congestion in blood vessel and blood sinusoids (2) hemorrhages in hepatocytes (3) hemolysis and hemosidrine pigment (4) degeneration and necrosis in hepatocytes (5) fatty degeneration in hepaocytes (6) parasite cysts in liver tissues of Tilapia zillii.Increase in GOT and GPT activities was associated with liver cells damaae. These changes in enzvmes activity and lesions in liver were recorded by the following order: Tilapia zillii > Clarias gariep'mus Mugil cephulus.
River Nile. fish
heavv metals. histopatholog\. liver
GOT. OPT
2005
01
01
203
219
https://ejabf.journals.ekb.eg/article_1824_ad6a4353e1e598f0a2c409ba83eb1779.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2005
9
1
دراسه ديناميکيه سيبيادولفيوسي (أدم 1941) في خليج السويس -مصر
2005
01
01
1
13
https://ejabf.journals.ekb.eg/article_1825_9d025b950e3126b8f98209b86c000c62.pdf