2024-03-29T08:48:58Z
https://ejabf.journals.ekb.eg/?_action=export&rf=summon&issue=436
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Distribution and species composition of the littoral interstiticial free living nematodes in the northern Red Sea, Egypt
Ashraf
Ahmed
Diaa Eddien
Mohammed
Mahmmoud
Hanafy
Free living nematodes represent the most abundant and diversified group of the interstitial meiobenthos in the northern Red Sea, where their contribution ranged between 38 and 100% of total count of all interstitial organisms. Nematodes distribution, abundance and species composition in the Egyptian Red Sea were studied during winter, 2006.Nematodes abundance ranged between 8 and 163 organisms/10 cm2. The intertidal zonation was investigated and showed increasing in the average density of nematodes toward low tide mark (sublittoral zone). A total of 79 nematode species were recorded; xyalid and oncholaimid were the most abundant families contributing 12% for each of totalnematodes count. Densities of nematodes were affected by the grain size of the sediment, TOMs and redox potential (Eh). Also, pollution and landfilling have the most drastic effect on their abundance and diversity.
free living nematodes
Distribution
Abundance
zonation
Community structure
Red Sea
2011
04
01
159
177
https://ejabf.journals.ekb.eg/article_2085_1bafdac27cd5666bcb8323f5b001e723.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Effect of oil pollution on serum growth hormone (GH) levels,histology and Ultrastructure of muscles of the Nile Tilapia (Oreochromis niloticus)
Abdallah
El-Shebly
Heba Allah
Elbaghdady
Over the last decades, there has been a growing interest in studying the main problems that could be harmful to the River Nile system in Egypt. Attention was paid to one of the most important problems that face the RiverNile, this is called River Nile transport project. So the main objective of the present study was to investigate the adverse effects that can result from spilled gasoline as petroleum product from various motor ships into the River Nile onone of the most important popular fishes in Egypt, Oreochromis niloticus to ascertain whether spilled gasoline into aquatic ecosystems can affect on the aquatic biota or not and to identify any potential public health risks that can beassociated with dietary intake of such fish by histological and ultrastructural studies on its edible muscles. Levels of the growth hormone secreted by the pituitary gland which is essential to the development of skeletal muscles andgrowth rate was also examined. So, the fish were exposed to increasing concentrations of gasoline: 0 (control), 100, 200 and 500 mg/L for 30 days. Unexposed fish exhibited significantly higher levels of serum GH compared tothat of tested fish. The GH levels decreased significantly with increasing gasoline concentrations. These data together indicate that Gasoline presents a hazardous substance for both the fish as well as the human consumers . Finally,the results revealed that the River Nile transport project can lead to serious harm to fish community that eventually become unsafe for human consumption. Therefore, this project must be carefully revised forbidden by health agencies.
gasoline
Nile tilapia
histopathology
Ultrastructure
Growth hormone (GH)
2011
04
01
145
158
https://ejabf.journals.ekb.eg/article_2086_74ab231d63f5f5ef78a86b19538663be.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Effect of temperature and female weight on reproductive performance of two Nile tilapia (Oreochromis niloticus) populations
Ahmed
Fath El-Bab
Mohamed
Farag
Ashraf
Ramadan
Amal
Hassan
he present study aimed to investigate the effect of temperature and female weight on reproductive performance of Nile tilapia. Reproductive performances of Oreochromis niloticus broodstock from two populations (Kafr Elshiek and Abbassa) were examined in hapas held in concreat tankes through three months (May, June and July 2010) in one spawning season at Abbassa (CLAR). A total of150 females (291.94, 385.68 & 455.68 g) and 75 males (300.148, 300.25 – 300.3 g) from Kafr Elshiek and 150 females (292.5, 387.280 & 456.22 g) and 75 males (300.254–300.44 g) from Abbassa farm were assigned to 6 haps in 2 concrete ponds (75 m2) at a density of 50 females and 25 males per hapa (3x8x1m ie 24 m3 water volume). Fish were exposed to different levels of water temperature ranging from 26.2 oC to 29.6 oC during the three months. The result showed that Nile tilapia begins to give fries at water temperature of 26.2 ± 3.6 oC and the highest reproduction activity in Abbassa population was recorded at the temperature of 26.2 ± 3.6 oC. Female gavemaximum average number of fries (3.03 ± 0.59 per gram body weight) in May.While, the reproductive activity was maximum in Kafer El-Shakh population at the temperature of 29.6 ± 2.65oC. Female gave maximum average number of fries (2.99 ± 0.94 fries per gram body weight) in June. The spawning percentage increased during May in Abbassa and kafer El-Shakh (91.63 ± 0.027 & 91.34 ±2.5% respectively) more than other months and the females (400 g) of Abbassa population gave the highest fries number (1025 ± 16.29 fries / female / month) in May at average water temperature of 26.16 oC and air humidity 44.9 %. While, females (300 g) of Kafer El-Shakh population gave the highest fries number (1021 ± 65.28 fries / female / month) in June at average water temperature 29.6 oC and air humidity 47.23%. The highest relative fecundity increased with the decrease in female body weight. Female of Kafer El-Shiek population with w body weight (300g) showed more relative fecundity (5.32±0.218 fries/g body weight) in June. Also, female of Abbassa population with low body weight (300 g) have more relative fecundity (5.24±0.0014 fries/g body weight) in May. On the other hand, female of Abbassa population with high body weight (500 g) have small relative fecundity (1.44±0.42 fries/g body weight) in July. While, female of Kafer El-Shiek population with high body weight (500 g) have lower relative fecundity (2.34±0.22 fries/g body weight) in July.
Average number of fry production per spawn was 983 .07±51.5 fries / female for Kafer El-Shiek population in June when water temperature was 29.6 oC. While, average number of fries production per spawn was 979.33±50.28fries / female for Abbassa population in May when water temperature was 26.16 oC. The result showed that the reporoductive performance of Orochromis niloticus could be maximized by holding broodstock under natural photoperiodin water temperature above 26.16 oC, and the optimal reporoductive performance occures through summer season during May and June. Females with height body weight (400 and 500g) gave fries in first generation age 30 days with high bodyweight in Abbassa (0.44 & 0.43 g respectively) and females with height body weight (500g) give fries in first generation age 30 days with high body weight in Kafer El-Shiek populations (0.43 g). At the optimal water temperature rangefrom 26 to 29 oC, females with the 300 g body weight started to spawn first and have more relative fecundity than high body weight and water temperature affected merely spawning frequency, but not the number of fries produced perspawn.
reproductive performance
relative and absolute fecundity
Oreochromis
niloticus
Water Temperature
two Populations
2011
04
01
179
193
https://ejabf.journals.ekb.eg/article_2087_86c95f8fa5ab3edd433e75554365c16c.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Physico-chemical characteristics and heavy metal contents in water of Wadi El-Rayan Lakes, western desert, Egypt.
Sayed
Shama
Mohamed
Goher
Mohamed
Abdo
Samy
Kaial
Ayman
Ahmed
Physico-chemical characteristics and eight heavy metals (Fe, Mn, Cu, Co, Cr, Ni, Pb and Cd) of Wadi El Rayan Lakes water were evaluated from summer 2009 to spring 2010. Salinity (TDS) and major ions show highly significantdifference between the two lakes. On the other side, station 1 in 1st lake (infront El Wadi Drain) exhibits the highest content of nutrient salts and heavy metals. The mean values of Fe, Mn, Cu, Co, Cr, Ni, Pb and Cd in the 1st lake were562.33, 82.71, 15.49, 9.69, 11.86, 11.68, 9.66 and <0.20μg/l respectively, on the other hand, the values were 372.00, 56.70, 10.37, 7.72, 9.72, 9.43, 6.79 and <0.20μg/l in the 2nd lake respectively. The present results revealed that the 2nd lake undergoes progressive increase in salinity, especially in the last decade and the lake water may be salinized with time, leading to a great revolutionize in fauna, flora and environment of these lakes. On the other hand, the discharge of pollutants via El Wadi Drain causes unfavorable impact on the lakesenvironment .
Wadi El-Rayan Lakes
nutrient salts
heavy metals and water quality
2011
04
01
225
240
https://ejabf.journals.ekb.eg/article_2088_394154f8bc8a582e5c8d520eee9426a8.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Effect of replacing dietary fish meal by cottonseed meal on growth performance and feed utilization of the Nile tilapia, (Oreochromis niloticus)
Magdy
Soltan
Ahmed
Fath El-Bab
Abdel-Nasser
Saudy
The present study aimed to investigate the effect of partial or complete replacement of the fish meal (FM) by cotton seed meal (CSM) in diets of Nile tilapia, Orcochromis niloticus, to reduce feed costs. Therefore, fiveexperimental diets contained 0, 25, 50, 75 and 100% CSM as replacements of FM. The final body weight decreased with increasing the level of replacing FM by CSM. However, the replacement of 25% of FM by CSM had no significanteffect on the final BW, while the higher replacing levels (50, 75 or 100%) significantly (P<0.05) reduced the final BW of the Nile tilapia and the same trend was also observed for body length, weight gain, specific growth rate, feedintake, feed conversion ratio and protein efficiency ratio.At the experimental termination (90 days), the highest condition factor (K) value was recorded for fish fed on diet 2 (CSM 25%), followed in a descending order by those fed on the control diet, D1 (CSM 0%); D5 (CSM 100%); D3(CSM 50%) and D4 (CSM 75%) respectively. Moreover among the other levels, the final K values of the Nile tilapia were not significantly affected by replacing levels of dietary FM by CSM.Hematocrit and haemoglobin values (hematological parameters) were almost decreased proportionally with increasing the dietary CSM protein level. Comparedwith fish fed the control diet (CSM0), all replacing levels of FM by CSMsignificantly (P<0.05) decreased He matocrit and haemoglobin values and the largest declines occurred for fish fed diets containing 50-100% CSM protein replacements. Values of serum transaminases (aspartate aminotransferase, AST and alanine aminotransferase, ALT) almost increased with each increase in CSM level as a substitute for FM in Nile tilapia diets. Results of proximate analysis of the whole fish body showed that as thedietary CSM level increased, protein content significantly (P<0.05) decreased while the opposite trend was observed for fat content where the increasing levels of CSM in the experimental diets significantly (P<0.05) increased fat content ofthe whole fish body. The inclusion of 25% CSM in the experimental diets had no significant effect on ash content while the other replacing levels (50, 75 and 100%) significantly reduced ash content of whole fish body.
Nile tilapia
(Oreochromis niloticus)
Growth performance
cotton seed meal
condition factos
2011
04
01
17
33
https://ejabf.journals.ekb.eg/article_2089_dea9f3bd3d8dc337c6987b2b0162a3e2.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Effect of partial replacement of dried, wet cull dates and date pits instead of yellow corn, supplemented with feed additives on growth performances of Nile tilapia (Oreochromis niloticus).
Hafz
Mabrouk
Mohamad
Zaki
Abd El-Aziz
Nour
Eman
Labib
A12-week feeding trials were conducted to evaluate the nutritive value of two forms of palm cull date and date pits as energy sources, supplemented with feed additives (Phytogenics), to be partially replaced (13.5%) yellow cornin feeding Nile tilapia fingerlings. Twelve experimental isonitrogenous (30.43% crude protein), isocaloric (436.43 kcal GE 100g-1) experimental diets were formulated taking into account energy sources and feed additives. Concerningenergy source, four experimental diets were formulated which contain: yellow corn (YC) as control diet, dried cull date (DCD), wet cull date (WCD) and date pits (DP). As for feed additives (flavorings), three dietary sub-groups were builtupin each group to include: zero additives, 0.03 % Digestarom® (DG) and 0.03 % Marjoram leaf extract (MLE). Ten fingerlings (10.55 ± 0.30 g) were stocked/aquarium; two replicates per treatment and fed twice daily (six days) at3% of body weight for 84 days.The results indicated that the partial replacement (13.5%) of WCD instead of YC supplemented with or without feed additives increased fish specific growth rate and feed utilization. However, replacement either DCD or DPdecreased tilapia performances; meanwhile DP recorded the worst values. On the other hand, DG supplementation improved fish performances either fed WCD-based diets or control diets (YC). It could be concluded that wet cull datemay be cost-effective when partially replaces yellow corn in tilapia diets as energy source, and improves fish performances when supplements with 0.03 % Digestarom®.
Cull Date
Date pits
phytogenic
additives
Growth performance
feed utilization
Oreochromis niloticus
2011
04
01
207
234
https://ejabf.journals.ekb.eg/article_2090_65df96224fc9ca7adaecbaa155a4e34d.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Variation of water quality and phytoplankton along different zones of Aswan High Dam Reservoir
Talaat
Salem
his study was carried out at Aswan High Dam Reservoir and focused on the spatial variation of water quality parameters and phytoplanktoncomposition. Water samples were collected from eighteen sampling stations, where six stations for each of the different zones were selected to represent the lacustrine, transition and riverine zones of the reservoir during 2007 and 2008. The results of the environmental factors showed wide variations in their concentrations along the different zones of the reservoir. In this study, chlorophyll a concentration was lower in the lacustrine zone than in the riverine, although turbidity and secchi depth values were all optimal for light availability. This result was influenced by higher abundances in the reservoir phytoplankton assemblages where riverine conditions predominate, by species tolerant to turbulent conditions and typical high mineral turbidity. Calculation of the trophic state index showed that riverine and transition zones are classified as eutrophic, while lacustrine zone is mesotrophic. Phytoplankton composition recorded thirty nine species belonging to Chlorophyceae (19 species), Cyanophyceae (10 species), Bacillariophyceae (7 species), and rare groups including Dinophyceae (2 species) and Eugelnophceae (1 species).Cyanophyceae were the most encountered group in the lacustrine and transition zones, while Bacillariophyceae were most encountered group in the riverine zone. This is due to that Cyanophyceae prefer the steady, transparent and lownutrients water (lacustrine), while Bacillariophyceae prefer flowing, turbid andnutrient-rich water (riverine).Statistical analysis showed that certain environmental factors do affect thephytoplankton growth. The results of the one-way ANOVA revealed that thedifferent environmental factors (DO, water temperature, secchi depth, watervelocity, turbidity, nitrate, phosphorus, magnesium, total dissolved solids, andtrophic state index) and biotic factors (such as chlorophyll a and phytoplanktongroups) were significantly different at the three zones of Aswan High DamReservoir (p<0.05). This result supports the speculation of variation in waterquality and phytoplankton along the different zones of the reservoir.
water quality
phytoplankton
lacustrine
transition
riverine
2011
04
01
87
104
https://ejabf.journals.ekb.eg/article_2091_f1b9b90a18817147ad647f5846c236f1.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Non-residual heavy metals in Lake Nasser bed sediments, Egypt.
Mohsen
Yousry
he Present study with the determination of concentrations of non-residual heavy metals (Iron, Manganese, Lead, Cadmium, Chromium, Copper, Nickel and Zinc) in Lake Nasser bed sediments as compared with total heavymetals contents in order to identify their environmental risk in Lake water. The analysis involves testing of sediments collected from eight sampling sites along riverine and transtion zones of Lake Nasser. Organic matter content for each ofthe sediment samples was also reported to study the effect of its content on the accumulation of metals in bed sediments. It was found that, the non-residual heavy metal levels (mg kg-1) in bed sediments were 0.11±0.05, 13.28±5.02, 12.52±2.89, 25.54±11.1, 24.53±11.29, 27.66±7.29, 11610±2810 and 418.87 ± 190.91 for Cd, Cr, Pb, Ni, Cu, Zn, Fe and Mn respectively. It represents about 20.4, 19.9, 25.2, 38.6, 57.6, 49.3, 41.1 and 45.8% from the total content of these metals respectively. Fe-Mn oxides and organic matter seem to be the main carrier phases for the non-residual fraction of these metals. The order of non-residual metal concentrations in sediment samples was found to beFe>Mn>Zn, Ni>Cu>Cr>Pb>Cd. In the present study, sediment quality assessment was done by calculating sediment pollution index and metal pollution index. The results of the assessment showed that, stream sedimentsfrom Lake Nasser are categorized into SPI0 natural sediments in all sites, except one site at km 403 which show SPI1 low polluted sediment. Metal pollution index highlights concentration differences between sites. Moreover,by comparing the results with sediment quality guidelines, it can be found that the Cd, Cu, Zn, Pb and Cr levels belong to the concentration below The Effect Range Low (ERL) and the toxicity to the biota in Lake Nasser was rarelyoccurred. It was also observed that, non-residual heavy metals were found very low compared with the agricultural land use target. This indicates that, Lake Nasser sediment can be used in amendment of agricultural land. The results ofthis study recommended the use of a pilot project to evaluate the characteristics of sediment for its potential use in agricultural land and to identify how sediments affect the crop yields. Some statistical applications were applied tostudy the behavior of the metal contents and their correlations in bed sediments.
Lake Nasser
Non-residual metals
Bioavailable
metals content
Effect Range Low (ERL)
2011
04
01
73
85
https://ejabf.journals.ekb.eg/article_2093_269a7307f5ce06600d914624cca4e300.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Non-residual heavy metals in Nasser lake bed sediments
Mohsen
Yousry
Non-residual metal in bed sediments is the amount of metal that is not present in the silicate matrix. It includes metal adsorbed on sediment particles, complexed by and adsorbed on organic matter, and in the form of soluble salts.Metal toxicity is dependent on its chemical form, mobility, degree of transformation, and bioavailability, which allow metal contaminants to enter the food chain. Bioaccumulation of metals by biota in surface water and by plants andanimals in terrestrial can adversely affect humans. This paper deals with the determination of concentrations of non-residual heavy metals (Iron, Manganese, Lead, Cadmium, Chromium, Copper, Nickel and Zinc) in Nasser Lake bedsediments as compared with total heavy metal content in order to identify their environmental risk in Lake Water. The analysis involves testing of sediments collected from eight sampling sites along riverine and transition zones of NasserLake. Organic matter content for each of the sediment samples is also reported to study the effect of its content on the accumulation of metals in bed sediments. It was found that, the non-residual heavy metal levels (mg kg-1) in bed sediments were 0.11±0.05, 13.28±5.02, 12.52±2.89, 25.54±11.1, 24.53±11.29, 27.66±7.29, 11610±2810 and 418.87±190.91 for Cd, Cr, Pb, Ni, Cu, Zn, Fe and Mn respectively. It represents about 20.4, 19.9, 25.2, 38.6, 57.6, 49.3, 41.1 and 45.8% from the total content of these metals respectively. Fe-Mn oxides and organic matter seem to be the main carrier phases for the non-residual fraction of these metals. The order of non-residual metal concentrations in sediment samples was found to be Fe>Mn>Zn, Ni>Cu>Cr>Pb>Cd. In the present study, sediment qualityassessment was done by calculating sediment pollution index and metal pollution index. The results of the assessment showed that, stream sediments from Nasser Lake are categorized into SPI0 natural sediments in all sites except one site at km 403 which show SPI1 low polluted sediment. Metal pollution index highlights concentration differences between sites. Moreover, by comparing the results with sediment quality guidelines, it can be found that the Cd, Cu, Zn, Pb and Cr levels belong to the concentration below The Effect Range low (ERL) and the toxicity to the biota in Nasser Lake was rarely occurred. It was also observed that, nonresidual heavy metals were found very low compared with the agricultural land use target. This indicates that, Nasser Lake sediment can be used in amendment of agricultural land. The results of this study recommended the use of a pilot project to evaluate the characteristic of sediment for its potential use in agricultural land and to identify how sediments affect the crop yields. Finally, some statisticalapplications were applied to study the behavior of the metal contents and theircorrelations in bed sediments.
Nasser Lake
Non-residual metals
Bioavailable
total metals content
Effect Range Low (ERL)
2011
04
01
73
85
https://ejabf.journals.ekb.eg/article_2095_4cca62faac9b348a2ab0c5ae275bcd3a.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Growth rates of the two reef-building species, Acropora humilis and Millepora platyphylla at Hurghada, Red Sea, Egypt
Tamer
Attalla
Mahmoud
Hanafy
Maher
Aamer
Linear growth rates were measured for two species of coral namely, Acropora humilis and Millepora platyphylla in Hurghada during the period from autumn 2006 to summer 2007. In addition, the rates of recovery in man-madelesion in M. platyphylla were estimated on seasonal basis. The linear growth rates of A. humils varied significantly according to the sheltering condition, with an overall mean of 8.89 and 6.98mm/year in exposed and sheltered sites. Thehighest linear growth rate of A. humilis was estimated at the exposed site of Gotta Abu Ramada, being 9.17mm/year, while the lowest rate of 6.61mm/year was recorded at the sheltered site of El-Fanadir Reef. The seasonal linear growthrates of M. platyphylla were affected significantly by the sheltering condition,and non-significantly by seasons. The estimated annual growth rates of M.platyphylla at the exposed sites averaged higher value of 15.65mm/yearcompared to 11.29mm/year at the sheltered sites. On the seasonal level, the highest overall mean of growth rates was recorded in spring, while the lowest mean was in autumn, being 3.72 and 3.06mm/season, respectively.The rates of diametric lesions recovery of M. platyphylla varied significantly according to seasons and non-significantly according to sheltering condition. The fastest recovery was recorded in summer, while the lowestrecovery was in winter. For instance, the lesions of 3847mm2 area each,recovered completely within 6 weeks in summer, while the same lesions area were not recovered completely after 12 weeks in winter.
growth rates
Acropora humilis and Millepora platyphylla
Hurghada Egypt
2011
04
01
1
15
https://ejabf.journals.ekb.eg/article_2096_01819c3112cd712f3697859fce815707.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Assessment of heavy metals in water, sediment and fish tissues, from ,Sharkia province, Egypt
El-Sayed
El-Sayed
Zeinab
Khater
Mohamed
El-Ayyat
El-Sayed
Nasr
The present study was conducted to investigate factors affecting live fish at different sources of water (agriculture drainage, industrial drainage and sewage wastewater). Heavy metal residues (zinc, copper, lead, cadmium,chromium, aluminium, manganese, nikel and cobalt) were determined in water, sediment and fish organs (muscles, gills, kidney and liver tissues) of three fishes (Oreochromis niloticus, Clarias gariepinus and Bagrus bayad). The industrialdrainage and sewage water revealed the highest concentrations of heavy metals followed by agriculture drainage water. The muscles, gills, kidney and liver tissues of fish samples collected from industrial drainage and sewage canals hadthe highest levels of heavy metal residues followed by agriculture drainage canals. The heavy metal studies revealed that there is a public health hazard associated with industrial drainage, sewage wastewater and agriculture drainageas the quality of fish did not comply with the standard levels recommended by WHO, USEPA and ANZECC. Potential adverse health effects in such applications could be avoided if the wastewater is sufficiently treated.
water
Sediment
fish tissue
Heavy metals
tilapia
Catf
2011
04
01
125
144
https://ejabf.journals.ekb.eg/article_2097_774859c6080608f6c42deca903003077.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
في شاطئ بنغازي ، ليبيا Diplodus annularis العادات الغذائية لسمکة الصبارص
رمضان
صالح
عائلة المرجانيات Diplodus annularis تمت دراسة العادات الغذائية لسمکة الصبارص(السباريدي) طيلة عام 2009 م ، والمجمعة شھري اً من ميناء بنغازي على الشاطئ الشرقي الليبي ، وتعدھذه السمکة من الأسماک التجارية وتلاقي قبولا لدى المستھلک ، ولقد تم جمع حوالي 596 عينة خلال فترةالدراسة، ووجد أن السمکة کانت ذات قدرة عالية لالتھام الغذاء في فصل الربيع ، ومتوسطة في فصليالصيف والخريف، وضعيفة التغذية في فصل الشتاء، وتتغذي ھذه السمکة أساس اً علي القشرياتوالرخويات والطحالب والأعشاب البحرية والديدان عديدة الأشواک والمثقبات وأجزاء الأسماک، کماأظھرت الدراسة أن القشريات والطحالب والرخويات ھم الغذاء الأساسي، وذلک خلال أشھر الدراسة،وفي کل الأطوال التى تمت دراستھا وجد أن نسبة القشريات والديدان عديدة الأشواک تقل بزيادة الأطواليقابلھا زيادة في نسبة الطحالب والرخويات والأعشاب البحرية والمثقبات وأجزاء الأسماک التي تزيدبزيادة الأطوال .
عادات التغذية
الصبارص
شاطئ بنغازي
2011
04
01
195
205
https://ejabf.journals.ekb.eg/article_2099_4346bcaab2e11d2c673f3faf81657644.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Effect of some medicinal plants diets on the mono-sex Nile Tilapia (Oreochromis niloticus), growth performance, feed utilization and some physiological parameters
Hayam
Tonsy
Samy
Mahmoud
Eman
Labib
Mohamed
Zaki
he effects of diets supplemented with six different medical plants (fenugreekmeal (FM), (Trigonella foenum-graecum); fenugreek sprouts meal (FSM);eucalyptus fresh leaves (EFL), (Eucalyptus citriodora); hot pepper meal (HPM)(Capsicum frutescens L. var. abbreviatum); thyme seeds meal (TSM) (Thymusvulgaris) and chamomile flowers meal (CFM), (Matricaria recutita L) at threelevels (0.00; 1.00 and 2.00 %) on the growth performance, feed utilization andwhole body composition and some physiological parameters of the Nile tilapia(Oreochromis niloticus) fry were studied. Fish were reared in twenty six glassaquaria (100 L volume of water /aquarium; duplicates per treatment) with anaverage initial weight of 0.82 ± 0.3 g/fish. Thirteen experimental diets wereformulated to contain 30% crude protein and 438.09 Kcal gross energy /100 g.Results obtained are summerized in the following:1-Regardless of levels, averages of growth performance and feed utilization parametersthat affected with medicinal plants, the best were for FSM diets (P≤0.05) followed bya significant decreased order of FM; EFL; HPM and both TSM and CFM,respectively.2-Regardless of medicinal plants sources, averages of growth performance and feedutilization parameters that affected with levels medicinal plants the best were (P≤0.05)for supplementation level of 1 %, follwed by a significant decreased order of 0.00 and2.00 % level, respectively.3-Concerning the interaction between medicinal plants sources and their levels (0.00,1.00 and 2.00 %) the highest growth performance and feed utilization values (P≤0.05)were obtained in group 1 % FSM (diet No.4), while the lowest was recorded by thegroup 2 % TSM (diet No.11).4- About interactions between medicinal plants sources and their levels; it was observedthat the lowest total plasma protein (g/dl), total plasma lipid (g/dl), Hb (g/dl), Ht (%),AST (U/L), ALT (U/L) and uric acid concentrations (mg/dl) parameters were obtainedby group 1 % FSM (diet No.4), while the highest values were recorded by the 2 %TSM (diet No.11).In general, and based on the obtained results, it could be concluded that addition of 1 %FSM is optimal for growth of the mono-sex Nile tilapia, O. niloticus, fingerlingswithout any adverse effect on fish health.
Nile tilapia
fenugreek
Eucalyptus
pepper
thyme
Chamomile
2011
04
01
53
72
https://ejabf.journals.ekb.eg/article_2101_8eb27002f129b2cdd203ce361f50537e.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Seasonal distribution of the littoral interstitial meiofauna in the northern Red Sea, Egypt
Mahmmoud
Hanafy
Diaa Eddien
Mohammed
Meiofaunal composition, distribution and seasonal abundance in the northern Egyptian Red Sea were studied during the period from spring 2006 to winter 2007. Significant seasonal variation in the density was recorded (P<0.001) and ranged between 100 and 130 organisms/10 cm2. The meiofaunal assemblage in the area of study was well diversified including 141 species. The principal taxonomic groups were free living Nematoda (68%) followed by Harpacticoida (12%), Polychaeta (10%) and Ostracoda (4%) in term of their densities. The exposure to wave actions and the sediment characteristics were the most important factors for structuring the meiofaunal community.
Meiofauna
seasonal abundance
Red Sea
Egypt
2011
04
01
35
51
https://ejabf.journals.ekb.eg/article_2102_8b1c075c92ba4edecba88a97bf0f3b93.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
Community structure and fish assemblage at Marsa Abu Dabab, Red Sea, Egypt.
Magdy
Alwany
The fish assemblages of different habitats at Marsa Abu Dabab (north Marsa Alam, Red Sea) were examined by visual census techniques. Fish communities were estimated for each of the investigated habitats; seagrasses andcoral reefs which have divided into three sectors; sector A (at north) and C (at south) represent coral reef habitats, whereas sector B (in the middle) represents seagrass habitat. A total of 172 fish species representing 94 genera wererecorded at Marsa Abu Dabab. The coral reef habitat had the highest number of species (162 species), while the seagrass habitat had the lowest (90 species). The highest average abundance was recorded at sector C in the reef wall habitat(1119 fish/1000 m3), with the lowest value at sector B in the seagrass habitat (240 fish/1000 m3). Some fish species were restricted to seagrass or coral reefs, while others were widespread along the gradient. Regarding to fish distributionpatterns, five families showed increasing in coral reef habitat (Pomacentridae, Labridae, Acanthuridae, Chaetodontidae and Serranidae), while other three families were abundant in seagrass beds (Siganidae, Sparidae and Mullidae).The five families in coral reef habitats showed in high abundance on reef wall (RW) more than reef flat (RF), except Acanthuridae.
Marsa Abu Dabab
Coral reefs
diversity
Fishes
Egypt
Red Sea
Seagrass
2011
04
01
105
124
https://ejabf.journals.ekb.eg/article_2103_51d5e71a59fe99de01ba4b4d5b4674ec.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2011
15
2
معدلات النمو لنوعين من المرجان الباني للشعاب أکروبورا ھيوميليس و ميليبورا بلاتيفيلا بالغردقة -البحر الأحمر – مصر
2011
04
01
1
13
https://ejabf.journals.ekb.eg/article_2104_746e3eccab8cf2d852d3dd67f1dcd878.pdf