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  • 1
    Publication Date: 2021-05-19
    Description: This experiment was conducted to investigate the effects of various starvation and refeeding periods on growth, feed utilization and body composition in Asian sea bass (Lates calcarifer) with an average initial weight of 30.26±1.4 g (mean±SE). The fish were exposed to three different regimes: the control group fed twice daily to apparent satiation throughout the experiment (C), the first group starved for 4 days and refed for 16 days, this cycle was repeated two times (T1) and the second group starved for 8 days and refed for 32 days (T2). At the end of experiment, there were not any significant differences in growth and feeding performance among different treatments (p〉0.05). Daily feed intake was significantly higher in the deprived fish than in the control fish (p〈0.05). There were no differences in moisture, lipid, ash and nitrogen free extract (NFE) content of carcass at the end of different starvation and refeeding periods between the deprived and control fish (p〉0.05). Starvation had a significant effect on protein content on one sampling date during the experimental period; protein content in T2 on day 8 was significantly lower compared to the control (p〈0.05). Sea bass showed complete compensation indicating a high ability of the deprived fish to grow sufficiently to fully compensate for weight loss during starvation. The results suggested that the feeding schedule involving starvation-refeeding cycles could be a promising feed management option for the culture of this species.
    Description: Published
    Keywords: Aquaculture ; Lates calcarifer ; Compensatory growth ; Feed deprivation ; Body composition ; Fish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.144-156
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  • 2
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    Publication Date: 2021-05-19
    Description: This research was conducted for evaluation of adaptation and growth rate of beluga (Huso huso) in brackish water earth pond in Yazd Province. In order to select the best density for beluga culture in brackish water earth pond, beluga with initial average weight of 21g were stocked 0.4 and 0.8 peace/m2 of earth pond with 1000m2 in area. Water resource was a semi deep well with initial temperature and salinity of 24 and 11.5 g/l respectively. During the time of culture, water temperature, pH, DO and salinity were 12-27 , 8.1-9.4, 4.5- 8.9mg/l and 11.5-13g/l in respectively. Culture period was 240 days. Results showed that growth performance of fishes in studied treatments had no significant difference.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Beluga ; Huso huso ; Earth pond ; Brackish water ; Evaluation
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 65pp.
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  • 3
    Publication Date: 2021-05-19
    Description: The influence of different percents of plant protein (30, 50 and 70) in the diet of white leg shrimp (Litopenaeus vannamei) with 38 percent protein, in comparison with a commercial shrimp diet (Fenneropenaeus indicus) with 39 percent protein (contain20 percent plant protein) was studied. Initial weight of shrimp was 10±1 gram. The average increase of shrimp weight in the end of culture period in experimental treatment 1 (contain 30 percent plant protein and 70 percent animal protein), 5.89±0.06 gram, experimental treatment 2 (contain 50 percent plant protein and 50 percent animal protein), 6.22±0.25 gram, experimental treatment 3 (contain 70 percent plant protein and 30 percent animal protein) 6/19±0/24 gram and in the control treatment (contain 20 percent plant protein and 80 percent animal protein) 6/42±0/40 were measured. Generally in the study of influence of experimental diets and control diet on the growth rate(GR), food conversion rate (FCR), protein efficiency ratio (PER), specific growth rate (SGR), average daily gain (ADG), demonstrate that, mentioned parameters in the control treatment is better than experimental treatments. But no significant difference measured between them (p〉0/05). Also results showed that, application of diets contain 50 percent of plant protein (with 22 percent soybean meal), and 70 percent of plant protein (with 72 percent soybean meal), can decrease costs of diet preparation and therefore shrimp production.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial ; Experimental ; Plant protein ; Litopenaeus vannamei ; Diets ; Growth indexes ; Shrimp ; Litopenaeus vannamei ; Fenneropenaeus indicus ; Growth Rate ; Protein ; Investigation ; Influence
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 37pp.
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  • 4
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25110 | 18721 | 2018-08-23 05:55:27 | 25110 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-16
    Description: This research was conducted for evaluation of adaptation and growth rate of beluga (Huso huso) in brackish water earth pond in Yazd Province. In order to select the best density for beluga culture in brackish water earth pond, beluga with initial average weight of 21g were stocked 0.4 and 0.8 peace/m2 of earth pond with 1000 m^2 in area. Water resource was a semi deep well with initial temperature and salinity of 24 and 11.5 g/l respectively. During the time of culture, water temperature, pH, DO and salinity were 12-27, 8.1-9.4, 4.5-8.9 mg/l and 11.5-13 g/l in respectively. Culture period was 240 days. Results showed that growth performance of fishes in studied treatments had no significant difference.
    Keywords: Aquaculture ; Iran ; Beluga ; Huso huso ; Earth pond ; Brackish water ; Evaluation
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 65
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  • 5
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25160 | 18721 | 2018-08-26 17:37:21 | 25160 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-16
    Description: The influence of different percent’s of plant protein (30, 50 and 70) in the diet of white leg shrimp (Litopenaeus vannamei) with 38 percent protein, in comparison with a commercial shrimp diet (Fenneropenaeus indicus) with 39 percent protein (contain20 percent plant protein) was studied. Initial weight of shrimp was 10±1 gram. The average increase of shrimp weight in the end of culture period in experimental treatment 1 (contain 30 percent plant protein and 70 percent animal protein), 5.89±0.06 gram, experimental treatment 2 (contain 50 percent plant protein and 50 percent animal protein), 6.22±0.25 gram, experimental treatment 3 (contain 70 percent plant protein and 30 percent animal protein) 6/19±0/24 gram and in the control treatment (contain 20 percent plant protein and 80 percent animal protein) 6/42±0/40 were measured. Generally in the study of influence of experimental diets and control diet on the growth rate(GR), food conversion rate (FCR), protein efficiency ratio (PER), specific growth rate (SGR), average daily gain (ADG), demonstrate that, mentioned parameters in the control treatment is better than experimental treatments. But no significant difference measured between them (p〉0/05). Also results showed that, application of diets contain 50 percent of plant protein (with 22 percent soybean meal), and 70 percent of plant protein (with 72 percent soybean meal), can decrease costs of diet preparation and therefore shrimp production.
    Keywords: Aquaculture ; Iran ; Bushehr Province ; Plant protein ; Litopenaeus vannamei ; Diets ; Growth indexes ; Shrimp ; Litopenaeus vannamei ; Fenneropenaeus indicus ; Growth Rate ; Protein ; Investigation ; Influence
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 37
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  • 6
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    In:  http://aquaticcommons.org/id/eprint/22854 | 18721 | 2018-05-30 18:51:05 | 22854 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-10
    Description: This experiment was conducted to investigate the effects of various starvation and refeeding periods on growth, feed utilization and body composition in Asian sea bass (Lates calcarifer) with an average initial weight of 30.26±1.4 g (mean±SE). The fish were exposed to three different regimes: the control group fed twice daily to apparent satiation throughout the experiment (C), the first group starved for 4 days and refed for 16 days, this cycle was repeated two times (T1) and the second group starved for 8 days and refed for 32 days (T2). At the end of experiment, there were not any significant differences in growth and feeding performance among different treatments (p〉0.05). Daily feed intake was significantly higher in the deprived fish than in the control fish (p〈0.05). There were no differences in moisture, lipid, ash and nitrogen free extract (NFE) content of carcass at the end of different starvation and refeeding periods between the deprived and control fish (p〉0.05). Starvation had a significant effect on protein content on one sampling date during the experimental period; protein content in T2 on day 8 was significantly lower compared to the control (p〈0.05). Sea bass showed complete compensation indicating a high ability of the deprived fish to grow sufficiently to fully compensate for weight loss during starvation. The results suggested that the feeding schedule involving starvation-refeeding cycles could be a promising feed management option for the culture of this species.
    Keywords: Aquaculture ; Biology ; Fisheries ; Compensatory growth ; Feed deprivation ; Body composition ; Sea bass ; aquaculture ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 144-156
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