A. Estim, R. Shapawi, S. R. M. Shaleh, Syafiqah Saufie, S. Mustafa
Aquaponics is rapidly emerging as a sustainable aquatic food production system that addresses the many concerns associated with aquaculture, especially those related to environmental footprint. Depending on certain factors aquaponics can be graded as low-carbon, carbon neutral or carbon negative method. In aquaponics, water discharged from the fish production chamber feeds the plants and plants absorb the waste and filter the water which returns to the fish tank. This characterizes the circular bioeconomy of the system. Nitrifying bacteria play a vital role in biological filtration by way of transforming toxic waste into a form usable by plants. Grow-bed media filters are central in the nitrogen cycle in a closed-loop system. That is highly biodynamic, with the variables that tend to change the balance among the various components of the whole system. Optimization of biological processes allows the system-level changes within a specified range but because of self-renewal inherent in the operations, the system shows no overall change. Modulating the grow-bed media is the essential feature of this balancing mechanism. It includes selection of media filters according to their physical attributes. This paper seeks to advance the current understanding of the most critical aspects of aquaponics that could help in developing system designs for a truly aquatic carbon farming.
{"title":"Decarbonizing Aquatic Food Production Through Circular Bioeconomy of Aquaponic Systems","authors":"A. Estim, R. Shapawi, S. R. M. Shaleh, Syafiqah Saufie, S. Mustafa","doi":"10.4194/aquast963","DOIUrl":"https://doi.org/10.4194/aquast963","url":null,"abstract":"Aquaponics is rapidly emerging as a sustainable aquatic food production system that addresses the many concerns associated with aquaculture, especially those related to environmental footprint. Depending on certain factors aquaponics can be graded as low-carbon, carbon neutral or carbon negative method. In aquaponics, water discharged from the fish production chamber feeds the plants and plants absorb the waste and filter the water which returns to the fish tank. This characterizes the circular bioeconomy of the system. Nitrifying bacteria play a vital role in biological filtration by way of transforming toxic waste into a form usable by plants. Grow-bed media filters are central in the nitrogen cycle in a closed-loop system. That is highly biodynamic, with the variables that tend to change the balance among the various components of the whole system. Optimization of biological processes allows the system-level changes within a specified range but because of self-renewal inherent in the operations, the system shows no overall change. Modulating the grow-bed media is the essential feature of this balancing mechanism. It includes selection of media filters according to their physical attributes. This paper seeks to advance the current understanding of the most critical aspects of aquaponics that could help in developing system designs for a truly aquatic carbon farming.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44769479","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}
Omega-3 long-chain polyunsaturated fatty acids (LC-PUFAs), mainly eicosapentaenoic acid (20:5n-3; EPA) and docosahexaenoic acid (22:6n-3; DHA), have drawn increasing attention, recently due to their important disease-preventing and health-promoting functions. The present study investigates the fatty acids profile of rainbow trout cultured in different farms in the different provinces (Erzurum and Sakarya) of Turkey. After detecting lipids and fatty acids content, the amount of fillet required for weekly intake of 3.5 g EPA+DHA suggested by International Society for the Study of Fatty Acids and Lipids (ISSFAL) for human consumption was calculated for each farm. The amount of EPA+DHA in fillets from Erzurum and Sakarya were 236.2±91.8 and 193.8±75.1 mg/g lipid, respectively, with no significant difference between the two provinces. The amounts of fillet required for weekly intake of 3.5 g EPA+DHA suggested by ISSFAL were calculated as 714±215 and 896±590 g for the farms in Erzurum and Sakarya, respectively, with no significant difference between the two provinces. Based on our results, required EPA+DHA for healthy purposes could be achieved by consuming rainbow trout approximately two or three times a week depending on the farm and the portion size.
Omega-3长链多不饱和脂肪酸(LC-PUFAs)，主要是二十碳五烯酸(20:5n-3;二十二碳六烯酸(22:6n-3;由于DHA具有重要的预防疾病和促进健康的功能，近年来受到越来越多的关注。本研究调查了土耳其不同省份(埃尔祖鲁姆和萨卡里亚)不同养殖场养殖的虹鳟鱼的脂肪酸谱。在检测脂类和脂肪酸含量后，计算国际脂肪酸和脂类研究协会(ISSFAL)建议人类每周摄入3.5 g EPA+DHA所需的鱼片量。鄂祖鲁姆鱼和萨卡亚鱼鱼片中EPA+DHA含量分别为236.2±91.8和193.8±75.1 mg/g脂质，两省间差异不显著。经ISSFAL计算，埃尔祖鲁姆和萨卡雅两省养殖场每周摄入3.5 g EPA+DHA所需鱼片量分别为714±215和896±590 g，两省间差异不显著。根据我们的研究结果，每周食用虹鳟鱼大约两到三次就可以达到健康所需的EPA+DHA，具体取决于养殖场和份量。
{"title":"Fatty Acid Content of Farmed Rainbow Trout: How Much Should We Consume for Enough EPA and DHA?","authors":"Hilal Bayir, M. Arslan","doi":"10.4194/aquast986","DOIUrl":"https://doi.org/10.4194/aquast986","url":null,"abstract":"Omega-3 long-chain polyunsaturated fatty acids (LC-PUFAs), mainly eicosapentaenoic acid (20:5n-3; EPA) and docosahexaenoic acid (22:6n-3; DHA), have drawn increasing attention, recently due to their important disease-preventing and health-promoting functions. The present study investigates the fatty acids profile of rainbow trout cultured in different farms in the different provinces (Erzurum and Sakarya) of Turkey. After detecting lipids and fatty acids content, the amount of fillet required for weekly intake of 3.5 g EPA+DHA suggested by International Society for the Study of Fatty Acids and Lipids (ISSFAL) for human consumption was calculated for each farm. The amount of EPA+DHA in fillets from Erzurum and Sakarya were 236.2±91.8 and 193.8±75.1 mg/g lipid, respectively, with no significant difference between the two provinces. The amounts of fillet required for weekly intake of 3.5 g EPA+DHA suggested by ISSFAL were calculated as 714±215 and 896±590 g for the farms in Erzurum and Sakarya, respectively, with no significant difference between the two provinces. Based on our results, required EPA+DHA for healthy purposes could be achieved by consuming rainbow trout approximately two or three times a week depending on the farm and the portion size.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70422205","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}
The present study was carried out to evaluate the effects of replacing fish meal with dietary Arthrospira platensis as a feed supplementation on growth performance, survival and skin pigmentation of guppy, Poecilia reticulata. A total number of two hundred forty healthy fishes (average body weight 0.15±0.02) were equally divided into four feeding groups (triplicates) as such as control (T0), 5% (ST1), 10% (ST2) and 15% (ST3). The final experiment was conducted in aquarium for 60 days. The average crude protein and Crude lipid levels of the diet is 10.31 & 39.81%, respectively. A significant increase in the concentration of carotenoids in fish skin was observed with an increase in spirulina concentration in fish feed. However, the ST3 treatment had highest carotenoids concentration. Redness, yellowness and whiteness found to have significant differences. There was a significant difference between treatment groups concerning the growth parameters. The ST3 diet significantly increases length, weight, net weight gain, weight gain, specific growth rate and survival rate. Inclusion of 15% Spirulina was found to be suitable to ensure growth as well as pigmentation of guppy. Spirulina powder can be used as protein and carotenoid supplements in fish feed to improve growth, survival and colouration of guppy.
{"title":"Effect of Spirulina Powder (Arthrospira platensis) as a Dietary Additives Ornamental Guppy, Poecilia Reticulata: Growth Performance, Survival and Skin Colouration","authors":"M. Bisht, Avdhesh Kumar, T. Shah","doi":"10.4194/aquast931","DOIUrl":"https://doi.org/10.4194/aquast931","url":null,"abstract":"The present study was carried out to evaluate the effects of replacing fish meal with dietary Arthrospira platensis as a feed supplementation on growth performance, survival and skin pigmentation of guppy, Poecilia reticulata. A total number of two hundred forty healthy fishes (average body weight 0.15±0.02) were equally divided into four feeding groups (triplicates) as such as control (T0), 5% (ST1), 10% (ST2) and 15% (ST3). The final experiment was conducted in aquarium for 60 days. The average crude protein and Crude lipid levels of the diet is 10.31 & 39.81%, respectively. A significant increase in the concentration of carotenoids in fish skin was observed with an increase in spirulina concentration in fish feed. However, the ST3 treatment had highest carotenoids concentration. Redness, yellowness and whiteness found to have significant differences. There was a significant difference between treatment groups concerning the growth parameters. The ST3 diet significantly increases length, weight, net weight gain, weight gain, specific growth rate and survival rate. Inclusion of 15% Spirulina was found to be suitable to ensure growth as well as pigmentation of guppy. Spirulina powder can be used as protein and carotenoid supplements in fish feed to improve growth, survival and colouration of guppy.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43203381","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}
This study was conducted to evaluate the feed utilization and protein effect ratios of combined and single diet administration of potassium di formate (KDF) in juvenile rainbow trout (Oncorhynchus mykiss). 600.000 trout fry were stocked as 50.000 in each cage and were fed 3 meals a day in the range of 25-80 grams and two meals a day up to 80-250 grams (until harvest time) and fed with commercial feeds until satiation. 3 kg/ton (T1), 5kg/ton (T2) and 7 kg/ton (T3) KDF were added to the diets and given to fish for 11 months. In the study, when the specific growth rates (SGR) of fish were compared, the results obtained in the T1, T2 and T3 groups were generally higher than in the control group. While no significant difference was found between T1 and T2 groups (p>0.05), there is a significant difference between T3, the other experimental groups and the control (p<0.05). In the study, a significant difference was found between the feed conversion rate (FCR of all groups, (p<0.05)). When the protein efficiency ratio (PER) was compared to the control group and the other groups, a significant difference was detected, while the same situation was found among the KDF supplemented groups (p<0.05). While the survival rate (SR) was significantly different between the control and experimental groups (p<0.05), there was no statistical difference between the experimental groups (p>0.05). The results of the study showed that the application of 7 kg/ton KDF can be considered a useful feed additive and a growth promoter for rainbow trout juveniles.
{"title":"Effects of Potassium Diformate (KDF) on Growth Performance and Some Physiological Parameters of Cultured Rainbow Trout (Oncorhynchus mykiss) in Commercial–Scaled Net Cages","authors":"Serhat Engin, Ozgur Altan","doi":"10.4194/aquast850","DOIUrl":"https://doi.org/10.4194/aquast850","url":null,"abstract":"This study was conducted to evaluate the feed utilization and protein effect ratios of combined and single diet administration of potassium di formate (KDF) in juvenile rainbow trout (Oncorhynchus mykiss). 600.000 trout fry were stocked as 50.000 in each cage and were fed 3 meals a day in the range of 25-80 grams and two meals a day up to 80-250 grams (until harvest time) and fed with commercial feeds until satiation. 3 kg/ton (T1), 5kg/ton (T2) and 7 kg/ton (T3) KDF were added to the diets and given to fish for 11 months. In the study, when the specific growth rates (SGR) of fish were compared, the results obtained in the T1, T2 and T3 groups were generally higher than in the control group. While no significant difference was found between T1 and T2 groups (p>0.05), there is a significant difference between T3, the other experimental groups and the control (p<0.05). In the study, a significant difference was found between the feed conversion rate (FCR of all groups, (p<0.05)). When the protein efficiency ratio (PER) was compared to the control group and the other groups, a significant difference was detected, while the same situation was found among the KDF supplemented groups (p<0.05). While the survival rate (SR) was significantly different between the control and experimental groups (p<0.05), there was no statistical difference between the experimental groups (p>0.05). The results of the study showed that the application of 7 kg/ton KDF can be considered a useful feed additive and a growth promoter for rainbow trout juveniles.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48218133","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}
M. Hasan, M. Uddin, Md. Jakiul Islam, Shema Biswas, K. Sumon, M. Prodhan, H. Rashid
Thiamethoxam is a broad-spectrum pesticide used in Bangladesh to protect crops from pests. In several ways, this pesticide ends up in aquatic ecosystems. Researchers have detected its existence in waterbodies. However, the harmful effects on non-target aquatic residents are not well studied and reported. As a result, the study sought to investigate the effect of thiamethoxam on the liver and kidney tissues of banded gourami (Trichogaster fasciata) using histopathological observations. Fish were exposed to five sub-lethal concentrations (in triplicates) of thiamethoxam (9.37, 18.75, 37.5, 75, and 150 mg/L) and 0 mg/L (control) for 90 days. Fish livers and kidneys were sampled on days 30, 60, and 90 of thiamethoxam exposure. The histopathological changes observed in thiamethoxam exposed fish were autolysis, acute cellular swelling, vacuolation, necrosis, and fatty change in the liver, whereas irregular renal corpuscle and cellular degradation of tissue were also observed in the kidney. The present study reveals that thiamethoxam can affect the livers and kidneys of Banded Gourami; therefore, the usage of this insecticide in agriculture should be applied carefully and monitored to avoid entry into water bodies.
{"title":"Histopathological Alterations in Liver and Kidney Tissues of Banded Gourami (Trichogaster fasciata) Exposed to Thiamethoxam","authors":"M. Hasan, M. Uddin, Md. Jakiul Islam, Shema Biswas, K. Sumon, M. Prodhan, H. Rashid","doi":"10.4194/aquast939","DOIUrl":"https://doi.org/10.4194/aquast939","url":null,"abstract":"Thiamethoxam is a broad-spectrum pesticide used in Bangladesh to protect crops from pests. In several ways, this pesticide ends up in aquatic ecosystems. Researchers have detected its existence in waterbodies. However, the harmful effects on non-target aquatic residents are not well studied and reported. As a result, the study sought to investigate the effect of thiamethoxam on the liver and kidney tissues of banded gourami (Trichogaster fasciata) using histopathological observations. Fish were exposed to five sub-lethal concentrations (in triplicates) of thiamethoxam (9.37, 18.75, 37.5, 75, and 150 mg/L) and 0 mg/L (control) for 90 days. Fish livers and kidneys were sampled on days 30, 60, and 90 of thiamethoxam exposure. The histopathological changes observed in thiamethoxam exposed fish were autolysis, acute cellular swelling, vacuolation, necrosis, and fatty change in the liver, whereas irregular renal corpuscle and cellular degradation of tissue were also observed in the kidney. The present study reveals that thiamethoxam can affect the livers and kidneys of Banded Gourami; therefore, the usage of this insecticide in agriculture should be applied carefully and monitored to avoid entry into water bodies.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44176073","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}
The present study investigates the probiotic potential and inhibitory activity of Salinicoccus hispanicus, isolated from saline tilapia culture water, against Vibrio parahaemolyticus. Results showed that the isolate is not pathogenic to Penaeus vannamei when administered orally at a dose of 106 cfu g-1 diet. Dietary supplementation for 45 days did not affect growth, reduced the gut content of V. parahaemolyticus to about five-folds and protected the shrimp against V. parahaemolyticus infection following a pathogen challenge test. Supplementation of S. hispanicus at 106 cfu g-1 diet can inhibit V. parahaemolyticus gut colonization and protects P. vannamei against this pathogen.
{"title":"Salinicoccus hispanicus (OL638305), a potential probiotic isolated from Saline Tilapia Greenwater, exhibits Vibrio parahaemolyticus killing activity and prevents acute hepatopancreatic necrosis disease in Penaeus vannamei","authors":"E. J. Mameloco, R. Cadiz, R. Traifalgar","doi":"10.4194/aquast909","DOIUrl":"https://doi.org/10.4194/aquast909","url":null,"abstract":"The present study investigates the probiotic potential and inhibitory activity of Salinicoccus hispanicus, isolated from saline tilapia culture water, against Vibrio parahaemolyticus. Results showed that the isolate is not pathogenic to Penaeus vannamei when administered orally at a dose of 106 cfu g-1 diet. Dietary supplementation for 45 days did not affect growth, reduced the gut content of V. parahaemolyticus to about five-folds and protected the shrimp against V. parahaemolyticus infection following a pathogen challenge test. Supplementation of S. hispanicus at 106 cfu g-1 diet can inhibit V. parahaemolyticus gut colonization and protects P. vannamei against this pathogen.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43910988","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}
Asiye Nur Saltan, B. Akbulut, Elif Aygur, Ercan Kucuk
This study aims to find effective concentration and lethal dose of benzocaine in Black sea salmon and determine effect of exposure time to air on survival rate of fish. In the study total 600 fish used with 3.02 ±0.14 cm and 0.29 ± 0.03 grams. Fresh water for trout rearing used and water temperature was 11.4±0.66°C during experiment. In order to determine the effective anesthetic dose of benzocaine in Black Sea salmon 20 fry were treated with benzocaine solutions of 20, 25, 30, 35, and 40 mg/l. To determination of lethal concentration five benzocaine concentration tested as 60, 70, 75, 80, and 85 mg/l. fry were simultaneously released into 28 mg /l consecration benzocaine solution to determine effect of exposing fish to air. After being kept in an anesthetic substance for 3 minutes, all fish were taken on fish net at the same time and the fish were exposed to air for 5, 10, 15, 20 minutes respectively, and they were taken to separate tanks according to their exposure time to the air and observed for 24 hours, mortality were noted. Effective concentration and lethal dose were determined by Probit analysis. As a result, this study showed that 25-26 mg/l benzocaine is sufficient to anesthesia Black sea salmon and approximately 3 times of this dose is lethal for these fish. Also, it showed that air exposure after anesthetic use is very critical in salmon fish fry. After from 10 minutes 15 to 20 minutes of air exposure considerable fatalities occurred. Survival rates were 80 to 90 % between 5 and 10 minutes of air exposure however, when fish leave in air for 15 minutes and 20 minutes this rate fall drastically to below 20 % survival rate within first 24 hours.
{"title":"First Use of Benzocaine as an Anesthetic in Black Sea Salmon (Salmo labrax) Fry","authors":"Asiye Nur Saltan, B. Akbulut, Elif Aygur, Ercan Kucuk","doi":"10.4194/aquast858","DOIUrl":"https://doi.org/10.4194/aquast858","url":null,"abstract":"This study aims to find effective concentration and lethal dose of benzocaine in Black sea salmon and determine effect of exposure time to air on survival rate of fish. In the study total 600 fish used with 3.02 ±0.14 cm and 0.29 ± 0.03 grams. Fresh water for trout rearing used and water temperature was 11.4±0.66°C during experiment. In order to determine the effective anesthetic dose of benzocaine in Black Sea salmon 20 fry were treated with benzocaine solutions of 20, 25, 30, 35, and 40 mg/l. To determination of lethal concentration five benzocaine concentration tested as 60, 70, 75, 80, and 85 mg/l. fry were simultaneously released into 28 mg /l consecration benzocaine solution to determine effect of exposing fish to air. After being kept in an anesthetic substance for 3 minutes, all fish were taken on fish net at the same time and the fish were exposed to air for 5, 10, 15, 20 minutes respectively, and they were taken to separate tanks according to their exposure time to the air and observed for 24 hours, mortality were noted. Effective concentration and lethal dose were determined by Probit analysis. As a result, this study showed that 25-26 mg/l benzocaine is sufficient to anesthesia Black sea salmon and approximately 3 times of this dose is lethal for these fish. Also, it showed that air exposure after anesthetic use is very critical in salmon fish fry. After from 10 minutes 15 to 20 minutes of air exposure considerable fatalities occurred. Survival rates were 80 to 90 % between 5 and 10 minutes of air exposure however, when fish leave in air for 15 minutes and 20 minutes this rate fall drastically to below 20 % survival rate within first 24 hours.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47859574","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}
Stinging catfish (Heteropneustes fossilis) has high consumer demand due to its high iron and calcium contents. Also, being a lean fish, it is very suitable for people who do not prefer to consume animal fats. In view of its nutritional and therapeutic significance and lack of data on dietary phenylalanine: tyrosine ratio, a dose-response experiment was conducted to determine phe: tyr ratio for H. fossilis fry (4.1±0.3g). Six isonitrogenous (380 g/kg crude protein) and isocaloric (15.3 kJ/g digestible energy) amino acid test diets were prepared by adjusting 26.6 g/kg of total phenylalanine and tyrosine in varying ratios of phenylalanine/tyrosine (30:70, 40:60, 50:50, 60:40, 70:30, 80:20) on molar basis. Quadruplicate groups of fishes were fed with diets indicated for 12-weeks to apparent satiation, thrice daily. Mathematical analyses of Daily Growth Coefficient (DGC%), Specific Growth Rate (SGR%/day), Feed Conversion Ratio (FCR) and Erythrocyte Osmotic Fragility (EOF) as quadratic-broken line regression analyses, exhibited optimum dietary phenylalanine: tyrosine ratio of 64.94: 35.06 corresponding to 15.83 g/kg: 8.55 g/kg on equimolar basis. Data of this study would be of high significance to ensure that optimum phenylalanine and tyrosine ratio of fish is met while using a greater variety of cost-effective dietary protein feedstuffs for sustainable aquafarming of this fish.
{"title":"Effects of Dietary Phenylalanine: Tyrosine Ratio on Growth, DNA/RNA, Serum Biochemistry, Digestive Enzyme Activities and Physiological Responses of Heteropneustes fossilis","authors":"S. Sayed, I. Imtiaz Ahmed","doi":"10.4194/aquast859","DOIUrl":"https://doi.org/10.4194/aquast859","url":null,"abstract":"Stinging catfish (Heteropneustes fossilis) has high consumer demand due to its high iron and calcium contents. Also, being a lean fish, it is very suitable for people who do not prefer to consume animal fats. In view of its nutritional and therapeutic significance and lack of data on dietary phenylalanine: tyrosine ratio, a dose-response experiment was conducted to determine phe: tyr ratio for H. fossilis fry (4.1±0.3g). Six isonitrogenous (380 g/kg crude protein) and isocaloric (15.3 kJ/g digestible energy) amino acid test diets were prepared by adjusting 26.6 g/kg of total phenylalanine and tyrosine in varying ratios of phenylalanine/tyrosine (30:70, 40:60, 50:50, 60:40, 70:30, 80:20) on molar basis. Quadruplicate groups of fishes were fed with diets indicated for 12-weeks to apparent satiation, thrice daily. Mathematical analyses of Daily Growth Coefficient (DGC%), Specific Growth Rate (SGR%/day), Feed Conversion Ratio (FCR) and Erythrocyte Osmotic Fragility (EOF) as quadratic-broken line regression analyses, exhibited optimum dietary phenylalanine: tyrosine ratio of 64.94: 35.06 corresponding to 15.83 g/kg: 8.55 g/kg on equimolar basis. Data of this study would be of high significance to ensure that optimum phenylalanine and tyrosine ratio of fish is met while using a greater variety of cost-effective dietary protein feedstuffs for sustainable aquafarming of this fish.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45645102","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}
Synthetic agents as growth promoters in aquaculture has become unpopular, hence, the need for better alternatives. This study was conducted to investigate the effects of dietary plants on growth performance, haematological, biochemical and oxidative stress parameters in African catfish. Fish were fed on basal diets for 84 days, the control and six other experimental diets containing different levels of Alstonia boonei (0.5%,1.0% and 1.5%) and Mitracarpus scaber (0.5%,1.0% and 1.5%) of the basal diets. Fish were weighed bimonthly, blood samples were collected and analyzed. At the end of the experiment, the final weight (FW), weight gain (WG), Average Daily Growth Rate (ADGR) and Specific Growth Rate (SGR) of fish fed with A. boonei and M. scaber were significantly higher than that of control (P<0.05). The values of RBC and haemoglobin of the M. scaber (0.5%) group were significantly higher than the other groups including the control. The values of Heterophil-Lymphocyte Ratio (HLR) and Platelet-Lymphocyte Ratio (PLR) in the control group were significantly higher than those of the treatment groups. Biochemical parameters and oxidative stress markers did not show any significant difference between the treatment groups and the control (P>0.05). The findings clearly indicated that the plants enhanced growth performance in fish with little or no deleterious effects.
{"title":"Evaluation of Growth, Haematological, Biochemical and Oxidative Stress Parameters of Clarias gariepinus Fed with Alstonia boonei and Mitracarpus scaber","authors":"A. Ajadi, Afusat Jagun Jibril, B. Emikpe","doi":"10.4194/aquast883","DOIUrl":"https://doi.org/10.4194/aquast883","url":null,"abstract":"Synthetic agents as growth promoters in aquaculture has become unpopular, hence, the need for better alternatives. This study was conducted to investigate the effects of dietary plants on growth performance, haematological, biochemical and oxidative stress parameters in African catfish. Fish were fed on basal diets for 84 days, the control and six other experimental diets containing different levels of Alstonia boonei (0.5%,1.0% and 1.5%) and Mitracarpus scaber (0.5%,1.0% and 1.5%) of the basal diets. Fish were weighed bimonthly, blood samples were collected and analyzed. At the end of the experiment, the final weight (FW), weight gain (WG), Average Daily Growth Rate (ADGR) and Specific Growth Rate (SGR) of fish fed with A. boonei and M. scaber were significantly higher than that of control (P<0.05). The values of RBC and haemoglobin of the M. scaber (0.5%) group were significantly higher than the other groups including the control. The values of Heterophil-Lymphocyte Ratio (HLR) and Platelet-Lymphocyte Ratio (PLR) in the control group were significantly higher than those of the treatment groups. Biochemical parameters and oxidative stress markers did not show any significant difference between the treatment groups and the control (P>0.05). The findings clearly indicated that the plants enhanced growth performance in fish with little or no deleterious effects.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49046226","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}
Dulon Roy, Abu Musa Mohammad Khairul Abedin, Ashish Kumer Sarker, Smita Sarker, Mst. Hasina Begum, G. Latifa
An investigation was conducted to observe some biological aspects including growth, sex ratio, gonadal maturity, artificial insemination, fecundity, fertilization, hatching and larval development of Mystus cavasius in a private hatchery. With the specific growth rate (SGR) of 1.80±0.53 and average daily gain (ADG) of 0.18±1.0, the total weight of the sampled fish ranged from 1.59±0.44 to 28.30±14.77 g, and the length ranged from 3.39±0.77 to 13.62±3.16 cm. There has been a strong association between fish length and weight (r2=0.95). The ratio of males to females was 1:1.58. The female and male lengths at first maturity were 9.2 and 9.6 cm, respectively. The gonadosomatic index (GSI) of females found in the present study were ranged from 4.35 to 7.44 with the mean of 6.71±0.69 during the study period. The fish is highly fecund and fecundity ranged from 5600 to 25860 with the mean of 17083±6055 for the corresponding length 15.49±1.69 cm, body weight 37.53±7.24 g and gonad weight 2.55±0.63 g. During the experiment, the fertilization, hatching rates, and larval development were observed. The scatter plot developed for the association between length and body weight, fecundity-body length, fecundity-body weight and fecundity- gonad weight implies a significant correlation both arithmetically and logarithmically.
{"title":"Some Biological Aspects of Pond Reared Mystus cavasius (Hamilton, 1822) Collected from a Local Fish Farm in Mymensingh, Bangladesh","authors":"Dulon Roy, Abu Musa Mohammad Khairul Abedin, Ashish Kumer Sarker, Smita Sarker, Mst. Hasina Begum, G. Latifa","doi":"10.4194/aquast797","DOIUrl":"https://doi.org/10.4194/aquast797","url":null,"abstract":"An investigation was conducted to observe some biological aspects including growth, sex ratio, gonadal maturity, artificial insemination, fecundity, fertilization, hatching and larval development of Mystus cavasius in a private hatchery. With the specific growth rate (SGR) of 1.80±0.53 and average daily gain (ADG) of 0.18±1.0, the total weight of the sampled fish ranged from 1.59±0.44 to 28.30±14.77 g, and the length ranged from 3.39±0.77 to 13.62±3.16 cm. There has been a strong association between fish length and weight (r2=0.95). The ratio of males to females was 1:1.58. The female and male lengths at first maturity were 9.2 and 9.6 cm, respectively. The gonadosomatic index (GSI) of females found in the present study were ranged from 4.35 to 7.44 with the mean of 6.71±0.69 during the study period. The fish is highly fecund and fecundity ranged from 5600 to 25860 with the mean of 17083±6055 for the corresponding length 15.49±1.69 cm, body weight 37.53±7.24 g and gonad weight 2.55±0.63 g. During the experiment, the fertilization, hatching rates, and larval development were observed. The scatter plot developed for the association between length and body weight, fecundity-body length, fecundity-body weight and fecundity- gonad weight implies a significant correlation both arithmetically and logarithmically.","PeriodicalId":36343,"journal":{"name":"Aquaculture Studies","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44892488","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：