Egyptian Journal of Aquatic Research最新文献_第5页

Stock assessment and management strategies for shark fisheries in the Arafura Sea: A length-based analysis of Carcharhinus sealei 阿拉法特拉海鲨鱼渔业的种群评估和管理策略:一种基于长度的海鲨分析

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2023.02.001

Erfind Nurdin, Duranta Diandria Kembaren, Tirtadanu

{"title":"Stock assessment and management strategies for shark fisheries in the Arafura Sea: A length-based analysis of Carcharhinus sealei","authors":"Erfind Nurdin, Duranta Diandria Kembaren, Tirtadanu","doi":"10.1016/j.ejar.2023.02.001","DOIUrl":"https://doi.org/10.1016/j.ejar.2023.02.001","url":null,"abstract":"<div>Increased demand for the production of sharks in the Arafura Sea can lead to the overfishing condition, which resulted in the depletion of fish stocks. Effective management measures are crucial to ensure the sustainability of shark fisheries. The objectives of this study were to investigate the stock status and to recommend some management strategies for shark fisheries in the Arafura Sea. Length frequency data and some life history parameters were used to perform a length-based stock assessment of Carcharhinus sealei in the Arafura Sea. C. sealei has an asymptotic length of 102.25 cm with a growth constant of 0.36 year−1. C. sealei has been exploited heavily, which was indicated by the current fishing mortality (Fcur = 1.2 year−1), which was much higher than its natural mortality (M = 0.29 year−1) and the optimal fishing mortality (F40%=0.49 year−1). This study revealed that the high fishing pressure of sharks has resulted in the stock overfished condition for C. sealei in the Arafura Sea, with the current spawning potential ratio (SPRcur = 0.23) less than the reference point 40% SPR. The low selectivity of drift gillnet (current Lc50 = 66 cm) caused the low spawning stock biomass of C. sealei. The stock rebuilding strategy would be required to increase the spawning stock biomass of C. sealei. A minimum legal size of 77 cm, a marine protected area, and effort controls were some management strategies that can be adopted for the sustainability of shark fisheries in the Arafura Sea.</div>","PeriodicalId":46117,"journal":{"name":"Egyptian Journal of Aquatic Research","volume":"49 2","pages":"Pages 261-267"},"PeriodicalIF":3.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49887994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biochemical responses of the giant clam (Tridacna squamosa Lamarck, 1819) and the burrowing sea urchin (Echinometra mathaei (de Blainville, 1825)) to spatial and seasonal variations on the Red Sea coast of Egypt 埃及红海沿岸巨蛤(Tridacna squamosa Lamarck, 1819)和穴居海胆(Echinometra mathaei (de Blainville, 1825))对空间和季节变化的生化反应

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2023.04.001

Samaa G. El-Sokkary , Khaleid F. Abd El-Wakeil , Ahmad H. Obuid-Allah , Mohsen Y. Omer

引用次数: 0

Evaluation of alternative non-traditional lipid sources in diet for Thinlip grey mullet, Liza ramada fingerlings 细唇乌鱼鱼种饲料中替代非传统脂质来源的评价

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2023.02.003

Mohamed M. Toutou , Abdelhamid M. Abdelhamid , Abdullah E. Helmy , Abdelrahman S. Abouzied , Mohamed M. Refaey

{"title":"Evaluation of alternative non-traditional lipid sources in diet for Thinlip grey mullet, Liza ramada fingerlings","authors":"Mohamed M. Toutou , Abdelhamid M. Abdelhamid , Abdullah E. Helmy , Abdelrahman S. Abouzied , Mohamed M. Refaey","doi":"10.1016/j.ejar.2023.02.003","DOIUrl":"https://doi.org/10.1016/j.ejar.2023.02.003","url":null,"abstract":"<div>The principal purpose of the present trial is to inspect the complete supply of nutritional fish oil by substituting lipid springs in an applied feed for Thinlip grey-mullet, Liza ramada fingerlings. The impacts of four lipid sources (fish viscera oil (FVO), poultry viscera oil (PVO), tallow oil (TO), and plant oil (PO)) compared with fish oil (FO) as a basal diet on performance growth rates, feed-utilization, biochemical structure of the body, specific blood constraints, and fatty acid profile were evaluated in Thinlip grey mullet fingerlings. The substitution of FO by four substitute lipids shows a non-significant but notable influence on growth performance. On the other hand, feed utilization productivity was significant for fingerlings nourished by the PVO diet. Fingerlings nourished by the PO diet showed significantly lower contents of the total body lipid compared to fingerlings nourished by other diets. Flesh fatty acid structure reflected dietary fatty acids composition. Higher polyunsaturated fatty acids (PUFAs) were detected in fingerlings' flesh nourished by FO, while lower contents were dedicated in fingerlings' flesh nourished by PO. Although saturated fatty acid (SAF) contents in fingerlings' flesh nourished by diet TO were greater than other treatments, these results are beneficial in nutritional design to decrease feed prices without compromising Thinlip grey mullet fingerlings growth.</div>","PeriodicalId":46117,"journal":{"name":"Egyptian Journal of Aquatic Research","volume":"49 2","pages":"Pages 229-234"},"PeriodicalIF":3.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49887996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrodynamic and circulation pattern in Lake Burullus, Egypt 埃及布鲁卢斯湖的水动力和环流模式

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2022.12.002

Ahmed E. Rifaat, Ebtessam E.E. Mohamed, Esam M. Deghady, Mohamed H. El-Mamoney, Hussien E.A. Maiyza

引用次数: 1

Evaluation of arsenic, selenium, tin and mercury in water and sediments of Bitter Lakes, Suez Canal, Egypt 埃及苏伊士运河苦湖水体和沉积物中砷、硒、锡和汞的评价

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2023.02.002

Mohamed A. El-Sawy, L.I. Mohamedein, Kh.M. El-Moselhy

引用次数: 1

Stability of macroalgal assemblage in the mangrove swamp as an indicator for the health and quality of the Red Sea waters 红树林沼泽中大型藻类群落的稳定性作为红海水域健康和质量的指标

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2023.01.004

Sarah H. Rashedy , El sayed A.E. Hamed , Islam M. El-Manawy , Leonel Pereira

{"title":"Stability of macroalgal assemblage in the mangrove swamp as an indicator for the health and quality of the Red Sea waters","authors":"Sarah H. Rashedy , El sayed A.E. Hamed , Islam M. El-Manawy , Leonel Pereira","doi":"10.1016/j.ejar.2023.01.004","DOIUrl":"https://doi.org/10.1016/j.ejar.2023.01.004","url":null,"abstract":"<div>Mangrove ecosystems support diverse macroalgal assemblages, which are primary producers. Community composition, percentage cover of macroalgae, and physicochemical parameters of seawater were studied at two mangrove areas in the Red Sea, Egypt, from November 2020 to October 2021. In addition, we sought to study changes in the relative densities of macroalgal species of the Red Sea in the two studied areas by using a comparison of our studying data (2020–2021) with previous studies carried out in the same locations in 1997–1998. In order to characterize the spatial variations in algal composition, three 20 m permanent line transects and three 1-m2 quadrates were established at each site. Throughout the duration of the study, the physicochemical parameters varied significantly (p < 0.05) among the seasons and were slightly different between the two sites. Twenty-four species of macroalgae were collected and identified from the studied sites. Approximately 29.2% of these algae (7 species) belong to the Chlorophyta, 45.8% (11 species) to the Ochrophyta (class: Phaeophyceae), and 25% (6 species) to the Rhodophyta. Phaeophyceae species had the highest diversity and richness values at both sites. Comparing the composition of the community during the years 2020–2021 and 1997–1998 yielded no statistically significant differences (p > 0.05). Mangrove trees support a high macroalgae cover, resistant to most environmental circumstances. The macroalgal assemblages' stability in the two studied areas over the two decades shows the health and quality of the Red Sea waters.</div>","PeriodicalId":46117,"journal":{"name":"Egyptian Journal of Aquatic Research","volume":"49 2","pages":"Pages 245-252"},"PeriodicalIF":3.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49850363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heavy metal health risk assessment in Cardisoma armatum Herklots, 1951 land crab tissues around Kribi mangrove areas, Cameroon Cardisoma armatum Herklots的重金属健康风险评估，1951年喀麦隆克里比红树林地区周围的陆蟹组织

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2023.02.005

Vanessa Maxemilie Ngo-Massou , Ernest Kottè-Mapoko , Ndongo Din

{"title":"Heavy metal health risk assessment in Cardisoma armatum Herklots, 1951 land crab tissues around Kribi mangrove areas, Cameroon","authors":"Vanessa Maxemilie Ngo-Massou , Ernest Kottè-Mapoko , Ndongo Din","doi":"10.1016/j.ejar.2023.02.005","DOIUrl":"https://doi.org/10.1016/j.ejar.2023.02.005","url":null,"abstract":"<div>Bioaccumulation of heavy metals in mangrove crabs has been reported and most of them are toxic to animals and potential human carcinogens. Given that the land crab Cardisoma armatum Herklots, 1951 is more consumed by surrounding populations, this study aimed to quantify the levels of metals in its tissues and to assess the human health risks. Soft tissues were isolated in adult crabs and frozen then; samples were dried, crushed and handled following the standard procedures. Human health risks were evaluated using some indices. Heavy metal levels in each tissue were shown in decreasing order: Fe > Zn > Al > Cu > Cd > Pb. Cadmium, lead and copper metals were in upper levels in the hepatopancreas (0.35, 0.19 and 7.88 mg/kg) whereas iron, aluminium and zinc were higher in muscles (129.30, 15.96 and 82.83 mg/kg). Most EDI values were apparently below the PTDI and CRLim values signifying that the consumption of C. armatum remains safe for consumers although, a limit in intake frequency might be required for children. For all metals, THQ and HI values were below the standard value 1 indicating no health risks in consumers due to the intake of single or several metals. Also, the carcinogenic risks for Cd and Pb metals are considered to be negligible because they are lower than 10−6. Overall, regarding the results, consumption of C. armatum seems harmless for human health in the study area.</div>","PeriodicalId":46117,"journal":{"name":"Egyptian Journal of Aquatic Research","volume":"49 2","pages":"Pages 189-196"},"PeriodicalIF":3.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49850355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of water quality on fish tissues and blood profile in Arab al-Ulayqat Lakes, Egypt 埃及阿拉伯al-Ulayqat湖泊水质对鱼类组织和血液剖面的影响

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2023.01.006

Lubna A. Ibrahim , ElSayed ElBastamy ElSayed

{"title":"The influence of water quality on fish tissues and blood profile in Arab al-Ulayqat Lakes, Egypt","authors":"Lubna A. Ibrahim , ElSayed ElBastamy ElSayed","doi":"10.1016/j.ejar.2023.01.006","DOIUrl":"https://doi.org/10.1016/j.ejar.2023.01.006","url":null,"abstract":"<div>This paper aims to investigate the relationship between water quality variables and fish blood profiles in Arab al-Ulayqat Lakes in Abu Zaabal, Egypt, during the years 2021 and 2022. It also investigates how water pollution affects the quality of Nile tilapia (O. (Oreochromis) niloticus). Water quality parameters were measured, and concentrations of six metals—namely Cu2+, Cd2+, Fe2+, Ni2+, Pb2+, and Zn2+—in water and fish were determined. In addition, the hematological and biochemical parameters of fish were evaluated. Results revealed that the water in the three lakes was brackish and seriously polluted. Lake #3, in particular, was highly ammonia-concentrated and had organic contaminants and metal ions. The results showed high resistance of O. niloticus to water pollution and relatively low accumulation of pollutants in muscle tissue. O. niloticus from Lake #3 had considerable Cu2+ and Zn2+ contamination. The results of the fish examination revealed that changes in water quality variables have a significant impact on the blood profile of fish. Fish from Lake #3 showed increased levels of amino-aspartate activity transferase (AST) and alanine aminotransferase (ALT), which indicates hepatotoxicity. All fish from the lakes exhibited increased values of creatine and urea, which indicates nephrotoxicity and reduced antioxidant enzyme activity. The hazard index (HI) analysis demonstrated that heavy metals had no deleterious consequences for human health through the daily consumption of fish gathered from the Nile River, Lakes #1 and #2. However, the HI for Lake #3 showed that the investigated heavy metals adversely affected health.</div>","PeriodicalId":46117,"journal":{"name":"Egyptian Journal of Aquatic Research","volume":"49 2","pages":"Pages 235-243"},"PeriodicalIF":3.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49887997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Histopathological aberration and 17-β-estradiol imbalance in green mussel Perna viridis population cultured in Java Sea, Indonesia 印尼爪哇海绿贻贝种群的组织病理学畸变和17-β-雌二醇失衡

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2022.07.002

Yenny Risjani , Arief Darmawan , Diana Putri Renitasari , Astri Lorma Ayuknita , Fathiya Rahma , Sulton Effendi , M. Dzacky Pradana , Afifa Rachma , Muh. Awaludin Adam

{"title":"Histopathological aberration and 17-β-estradiol imbalance in green mussel Perna viridis population cultured in Java Sea, Indonesia","authors":"Yenny Risjani , Arief Darmawan , Diana Putri Renitasari , Astri Lorma Ayuknita , Fathiya Rahma , Sulton Effendi , M. Dzacky Pradana , Afifa Rachma , Muh. Awaludin Adam","doi":"10.1016/j.ejar.2022.07.002","DOIUrl":"https://doi.org/10.1016/j.ejar.2022.07.002","url":null,"abstract":"<div>Histological aberration is a common phenomenon in aquatic animals exposed to pollution. Pollution also influences the hormonal condition of an organism, including the green mussel Perna viridis. In the present study, degeneration and lyses were studied in the females' oocytes of P. viridis and the 17-β-Estradiol was measured in the gonads of female and male individuals. The damage analysis was carried out and the aberration level in the tissue was measured by image processing analysis using R-Software. The concentration of 17-β-Estradiol in the gonads was measured by the ELISA method. Histopathological aberration and 17-β-Estradiol concentration in the female gonad tissue of P. viridis were detected in the samples with variable quantities. The high value of 17-β-Estradiol in males cultured in the industrial city of Indonesia indicated that this mussel species experienced hormonal imbalances and represent a threat with regard to food safety.</div>","PeriodicalId":46117,"journal":{"name":"Egyptian Journal of Aquatic Research","volume":"49 2","pages":"Pages 197-203"},"PeriodicalIF":3.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49850358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Impact of drainage effluents and wind direction on the copper distribution and balance in Abu-Qir Bay, Alexandria, Egypt 排水废水和风向对埃及亚历山大Abu Qir湾铜分布和平衡的影响

IF 3.5

Egyptian Journal of Aquatic Research Pub Date : 2023-06-01 DOI: 10.1016/j.ejar.2022.12.003

Omneya Ibrahim , Nadia Badr , Sherif Ismail , Amro El-Baz

{"title":"Impact of drainage effluents and wind direction on the copper distribution and balance in Abu-Qir Bay, Alexandria, Egypt","authors":"Omneya Ibrahim , Nadia Badr , Sherif Ismail , Amro El-Baz","doi":"10.1016/j.ejar.2022.12.003","DOIUrl":"https://doi.org/10.1016/j.ejar.2022.12.003","url":null,"abstract":"<div>Heavy metals entering seawater pose a global threat to marine life and the ecological system. In this regard, this study investigates the mass balance of copper in Abu Qir Bay, a shallow basin located in the western Mediterranean coastal zone of Egypt. The study area is well-thought-out as a fertile marine habitat, which emphasizes the presence of naturogenic and anthropogenic activities. Three land-based sources, namely al-Tabia outfall, al-Maadia outlet, and the Rosetta branch of the Nile River, are seriously affecting the bay causing pollution problems. As part of this research, rainfall, seawater, and drainage water samples were collected to determine and evaluate the relative importance of different sources on the geochemical cycle of copper in the bay. The results revealed that the mean total concentration of copper in the bay was 74.61 ± 18.37 μg/l. Abu Qir Bay receives about 1374.8 ± 171.05 and 643.13 ± 153.03 tons of copper annually from agricultural and industrial discharges, respectively. The outflowing surface water from the bay transports 2463 ton/year of the total amount of copper to the southeastern Mediterranean water. The calculated residence time of copper in Abu Qir Bay was 101 days, while the assimilative factor of copper in the bay amounted to 40 ton.m3/mg.year. As per the findings, a 90 % reduction of the total copper concentration in the bay, in case the external loading stops, can act as an important solution for quick recovery of the bay condition to reach 7.5 μg/l after 121 days.</div>","PeriodicalId":46117,"journal":{"name":"Egyptian Journal of Aquatic Research","volume":"49 2","pages":"Pages 213-219"},"PeriodicalIF":3.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49850360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0