Mediterranean Aquaculture Journal最新文献

{"title":"Estimation of growth, population parameters, and exploitation rate of Penaeus semisulcatus (De Haan, 1844) in Bardawil Lagoon, North Sinai, Egypt","authors":"Ahmed M. AL-Beak, Mohamed Ahmed, Afnan Khaled, Mohamed Hassan, Manar Yasser","doi":"10.21608/maj.2024.334696","DOIUrl":"https://doi.org/10.21608/maj.2024.334696","url":null,"abstract":": Among other crustaceans in the Bardawil Lagoon, Penaeus semisulcatus has a significant marketing value. Many biological parameters and population structure of green tiger prawn; investigated in this study during the fishing season 2022/2023. Seasonal growth in length and weight assessed for males and females by five seasons (ages) life span. The constant of total length-total weight relationship b= 2.50 for males, 2.15 for females, and 2.26 for both . Parameters of theoretical growth in length and weight L∞, K, t0, and W∞ were (22.76 cm, 0.21, -0.89 yr-1, and 94.90 gm for males), (29.32 cm, 0.14, -1.20 yr-1, and136.38 gm for females), and (23.05 cm, 0.2, -0 .89 yr-1, and 79.19 gm for all individuals). Instantaneous mortality rates Z, M, and F were (0.79, 0.43, and 0.36 yr-1 for males), (1.01, 0.42, and 0.59 yr-1 for females), and (0.92, 0.42, and 0.49 yr-1 for both sex). The exploitation rate was 0.46, 0.58, and 0.54 yr-1 for males, females, and all individuals. That indicates the P. semisulcatus population is over exploited in the Lagoon. Accordingly, the recommended procedure for reduction of fishing efforts or changing the mesh sizes of bottom trawl gear must apply.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"41 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535997","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}

{"title":"Effect of frozen storage on fish quality and fishery products: A Review","authors":"Adel Ellahamy","doi":"10.21608/maj.2024.334695","DOIUrl":"https://doi.org/10.21608/maj.2024.334695","url":null,"abstract":": One of the most significant problems for the food preservation industry is maintaining the quality of food products for an extended period. Fish and fishery products are highly perishable foods that degrade easily during harvesting and processing as a result to a combination of chemical, physical, and microbiological changes. The current study focuses on the changes in the chemical composition, nutritional value freshness indicators, quality features, microbiological safety, and sensory evaluation of fish and fishery products as affected by freezing storage periods. Therefore, this study aims to give a combined overview of the changes that occur to different types of fish and their various products during the process of preservation by freezing, so that it is a collected source for all these changes in one place, in order to facilitate the process of comparing the changes that occur during the freezing process between different types of fish and their products.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"40 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139536004","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}

{"title":"The impact of Enterocytozoon hepatopenaei (Ehp) on penaeus vannamei shrimp seed growth in a nursery and grow out system in andhra pradesh, south east coast of India","authors":"G. Sankar, V.R Mansingh, Gunalan B","doi":"10.21608/maj.2023.200232.1021","DOIUrl":"https://doi.org/10.21608/maj.2023.200232.1021","url":null,"abstract":": In the Asia-Pacific region, shrimp cultivation is the most lucrative and profitable aquaculture industry, and recent developments in India have threatened the industry's success due to microsporidian parasite, Enterocytozoon hepatopenaei (EHP) associated with retarded growth without other clinical signs, causing significant economic losses to the shrimp industry. In the present study in the nursery Mild EHP was noticed before shifting to the grow-out pond. After shifting to the grow-out pond, very poor growth was noticed in all the ponds, and also heavy size variations were noted. In V5 pond growth was stented due to EHP, and in pond V1 reverse growth was noticed due to size variation. Overall in all ponds, very poor weekly gains of .6 to .9 grams were recorded. In the present study due to slow growth with size variation Pond V4 shrimp were harvested at 136 counts and Pond V2 was harvested at 120 counts. The remaining ponds harvested 133 and 136 counts. So the present study confirms that sometimes the EHP-infected seeds show negative results PCR lab. But after stocking to nursery or growing out EHP infection can expose the middle of the culture also. So better before shifting the seeds to the grow-out pond to confirm through microscopic analysis as well as PCR lab results as free from EHP .","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132825829","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}

{"title":"Age, growth and mortality of the Gilthead Seabream, Sparus aurata (Family: Sparidae) in Bardawill lagoon, North Sinai, Egypt","authors":"M. Mostafa, Myssara El-Ameen, A. El-Dakar, M. Salem, Ahmed M. AL-Beak","doi":"10.21608/maj.2023.202421.1022","DOIUrl":"https://doi.org/10.21608/maj.2023.202421.1022","url":null,"abstract":"","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133546239","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}

{"title":"The Growth and Biochemical Composition of Nannochloropsis oculata Under Influence of Different Phosphorus Sources for Aquaculture Live food","authors":"A. El-dakar, S. Shalaby,, Neama Elaraby","doi":"10.21608/maj.2023.215574.1024","DOIUrl":"https://doi.org/10.21608/maj.2023.215574.1024","url":null,"abstract":": Phosphorus is one of the most important nutritional factors that regulates cell growth and plays a significant role in most cellular processes. The effect of different phosphorus sources on the growth and biochemical composition of Nannochloropsis oculata ( N. oculata ) was investigated in this study. Four treatments: mono potassium phosphate (KH ₂ PO4), potassium di phosphate (K 2 HPO 4 ), calcium super phosphate (CaH 6 O 9 P 2 ), and media without any phosphorus sources were all compared to F/2 media, which has sodium di hydrogen phosphate (NaH 2 PO 4 ) as a control at a concentration of 36 µmol -1. The experiment lasted for 15 days under the conditions of 100 μmol photons per m2s of light intensity, with a light-to-dark (L/D) ratio of 24:0, a salinity of 25 g/L, temperature maintained at 23± 1 °C, and a pH value of pH 7.5 ±0.3. The growth of N. oculata based on cell density was inhibited in the medium without any phosphorus sources (5.3×106 cell/ mL) and increased significantly in the medium with NaH 2 PO 4 (16.4×106 cell/ mL). All phosphorus sources showed that there were significant differences ( P ≤ 0.05 ) between all treatment media in chlorophyll content; KH ₂ PO 4 achieved the highest significant chlorophyll a content (Chl a) with 4.25 mg/l, followed by K 2 HPO 4 4.12 mg/l. Cells treated with NaH 2 PO 4 produced the highest total protein and lipid content (31.14% and 46.63% by dry weight, respectively). Media without phosphorus had the highest total carbohydrate (22.48%), while the lowest total lipids and total carbohydrate achieved by KH ₂ PO 4 and CaH 6 O 9 P 2 had the lowest total protein (25.90%). Arachidonic acid (C20:4 ω6) recorded its highest value (0.83%) with K 2 HPO 4 . While γ-Linolenic acid (C18:3 ω6) recorded its highest value (1.43%) with NaH2PO4. Whereas eicosapentaenoic acid (C20:5 ω3) was achieved the highest level in NaH 2 PO 4 (9.53%) and CaH 6 O 9 P 2 (0.37%). In conclusion, this study demonstrated the variation of growth, fatty acid profile, and biochemical composition in N. oculata , benefiting the production of microalgae for aquaculture live food.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116894263","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}

{"title":"Effect of re-feeding regime under different stocking density of Nile tilapia, O. niloticus on growth performance, nutritional efficiency and fish body composition","authors":"A. El-dakar, Aya Mouhmed, A. Elgamal, M. Amer, S. Shalaby,, Mohamed F. Abdel-Aziz","doi":"10.21608/maj.2023.192473.1019","DOIUrl":"https://doi.org/10.21608/maj.2023.192473.1019","url":null,"abstract":".","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129664751","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}

{"title":"Risk assessment and vulnerability of aquaculture activities in the Nile Delta to climate change impacts and its implications on food security","authors":"N. Soliman","doi":"10.21608/maj.2023.210715.1023","DOIUrl":"https://doi.org/10.21608/maj.2023.210715.1023","url":null,"abstract":": Despite all debates and controversies, a global consensus has reached that climate change is a reality. It is predicted to lead adverse and irreversible implications on the earth. These implications may include increased global temperature, sea level rise, and extreme weather events, which will have direct or indirect impacts on food production systems and global biodiversity. In this context, aquaculture is no exception. This paper discusses potential impacts of climate change on aquaculture and food security in the Nile Delta of Egypt. The assessment considered mainly inundation by sea level rise, heat stress and increasing water salinity due to Sea level rise. Results showed that, the total areas of fish farms that would be vulnerable to inundation, according to the RCP2.6 and RCP8.5 scenarios were found to be about 57176.64 feddan and 63025.95 feddan, respectively. These areas represent 54.35 and 59.92% of the total area of the present fish farms of Kafr El Sheikh Governorate. The combined effects of rising temperatures, sea level and salinities in the study area may result in a number of positive impacts on aquaculture activities such as increased growth rates and food conversion efficiencies of target species, longer growing seasons, reduced cold water mortality and expansion of areas suitable for aquaculture.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129981463","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}

{"title":"Length-weight relationship, condition factor, and length at first capture of Chelon auratus (Risso, 1810) golden grey mullet in Bardawil lagoon, North Sinai.","authors":"Mohamed K. El-Shenity, A. El-Dakar, Mohamed S. Ahmed, Ahmed M. AL-Beak, S. Ahmed","doi":"10.21608/maj.2023.197684.1020","DOIUrl":"https://doi.org/10.21608/maj.2023.197684.1020","url":null,"abstract":": Some biological aspects such as length-weight relationship, condition factor, and length at first capture were studied for golden grey mullet Chelon auratus in the Bardawil lagoon during the fishing season 2020- 2021. Chelon auratus lengths ranged between 14.5–33.8 cm, and total weight ranged between 27 – 237.20 gm. The total length - total weight relationship was estimated as TW= 0.0257 TL2.652, TW= 0.0344 TL2.5296, and TW= 0.0239 TL2.652. for both sexes combined, males and females respectively; with (b) value >3. The highest condition factor was observed in October for both sexes, but by size group, it was found 24-24.9 cm for males also 16-16.9 and 22-22.9 cm for females have the highest condition factor. The length at first capture were found Lc= 19.20 and 20 cm for females and males, respectively. The objective of this study is to determine the current biological status of this species in the Bardawil lagoon.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124185611","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}

{"title":"Evaluating different levels of dietary germinated corn embryo powder on reproductive performance, physiological measurements of Nile tilapia brood-fish Oreochromis niloticus and growth performance of their larvae","authors":"D. Lotfy, S. Allam, R. Abou Zied, Mohamed F. Sadek","doi":"10.21608/maj.2022.169203.1015","DOIUrl":"https://doi.org/10.21608/maj.2022.169203.1015","url":null,"abstract":"This work was performed to investigate the effect of different levels of germinated corn as a dietary ingredient on spawning efficiency and larval performance of Nile tilapia Oreochromis niloticus. The experimental treatments were conducted in a private hatchery. Ten hapas, each with dimensions (28m 3 ) were used to accomplish this work. Brood-stock was randomly stocked in each hapa with a sex ratio (1 male: 3 females, i.e.15 males: 45 females). The initial average weight of males and females were 194±10g and 185±15 g, respectively. Five experimental diets were formulated and applied on the two experiments as follows: control: brood-stock and fry fed a diet without germinated corn, T1, T2, T3, and T4: fish were fed diets containing different levels of germinated corn meal (1, 2, 3, and 4%, respectively). Statistical analysis showed that fish-fed diets containing 2% Sprouted corn were significantly better in growth performance, feeding utilization indices (HSI, VSI, GSI and condition Factors) and hatching indices (number of fry produced and survival of larvae) in comparison with other treatments. Besides blood hematological and biochemical parameters, fish that were fed with dietary germinated corn had the best results compared to control treatment. Thus, it is recommended that the inclusion of 2% germinated corn meal (T2) as feed additives for tilapia brood-stock is more useful for improving their growth performance, feed utilization, and reproductive performance.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117296010","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}

{"title":"Detection of polycyclic aromatic hydrocarbons (PAHs) in cold and hot smoked Mullet fish (Mugil cephalus) products by using GC-MS.","authors":"Mohamed Saleh Qourany, Khalil Ibrahim Khalil, S. El-Sherif, Adel A. Mohdaly, Samah Abd-Eltawab, Hassan Rabea Mohamed","doi":"10.21608/maj.2022.164140.1013","DOIUrl":"https://doi.org/10.21608/maj.2022.164140.1013","url":null,"abstract":": The aim of this study is to determine the levels of polycyclic aromatic hydrocarbons in cold and hot smoked mullet fish obtained from two fish farms (A and B) localized at El-Fayoum Governorate, , Egypt during November 2020. It found The 5 compounds of PAHs; acenaphthylene, acenaphthene, fluorene, fluoranthene and pyrene were detected in both cold and hot smoked fish samples from the two farms (A) and (B), while phenanthrene and anthracene were detected only in cold smoked samples from farm (A) and (B). The total PAHs in the cold and hot smoked Mullet fish samples obtained from farm (A) were 42.9 and 12.1 μg/kg, respectively, while in cold and hot smoked samples obtained from farm (B) were 32.1 and 11.2 µg/kg, respectively. Benzo (a) pyrene (BaP) compound that considered as indicator for carcinogenic PAHs was not detected in both cold and hot smoked Mullet fish. Also, PAH4; benzo (a) pyrene, benzo (a) anthracene, benzo (b)fluoranthene and chrysene did not detected in both the cold and hot smoked Mullet fish. Categories of PAHs concentration are considered a minimally contaminated (10 to 99 µg/kg) compared with the maximum recommended levels. Based on our results, it could be concluded that Benzo (a) pyrene compound was not detectable in all smoked samples which are considered as a safe product for consumption.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129402704","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}