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  • 1
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    Nutrient requirement in Salmo trutta caspius Kessler (1870) for aquaculture purposes (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: A sharp decline in natural population of Caspian brown trout lead to implementing of restocking program in Iran. Along the stock recovery program, the artificial production of this species has been attracted too much attention in recent years. The objective of the study is to assess the effects of protein and energy levels of diet on fish performance, growth efficiency of Caspian brown trout in order to develop a proper diet for production of this species. Six experimental diets were formulated by replacing casein as a pure protein source with fat as an energy source in the diets according to a 3×2 factorial design. The diet was assigned to 18 tanks with 50 fish each, with three replicated for each diet. The experiment was conducted for 8-weeks with Caspian brown trout with an initial body weight of around 7 g. Caspian brown trout demonstrated a better FCR and a larger SGR at lower protein levels (45 and 50%) in comparison to high protein level (55%; P〈0.05). Protein efficiency ratio improved by a decrease in protein content of the diet (P〈0.05), but energy content of diets does not affect any growth related parameter such as FCR, SGR and PER. There was also no interaction between protein and energy levels in the growth related parameters, suggesting the effect of protein on the growth parameters in Caspian brown trout did not depend on energy levels of diet. In conclusion diet containing 50% protein can support the maximum growth. High dietary energy level of the diet dose in cooperate in protein sparing effect.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Caspian brown trout ; Artificial production ; Growth ; Diet ; Protein ; Energy ; Weight ; FCR ; SGR ; Salmo trutta caspius ; Aquaculture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 40pp.
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  • 2
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    Rearing of common carp (Cyprinus carpio) in fiber glass tanks with pellet feeding (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The intensive culture of common carp (Cyprinus carpio) evaluated in fiberglass tanks(2*2m) with feeding on pellet during 8 weeks.The fish (n=201)of common carp selected from three treatments along with three replicates as the average of fish weight was less than 100(g )which divided into 〈50(g), 50-70(g) and 70-100(g).At the first experiment , there is no statistically significant difference between fish weight in relative to replicate treatment (P〉0.05).The common pellet food was chosen for feeding from market as fish were fed by the mean of 4% of their body weight a day. The result indicated that the mean of particular growth ratio at first treatment (0.54) has higher than second treatment (0.34) but in comparison with third treatment (0.46), there was no statistically significant difference (P〈0.05).Also, the conversion ratio at first treatment (5.28) and third treatment (6.09) was lower than second treatment (35.66) and third treatment (20.91) was lower than second treatment (24.24), (P〈0.05). This study showed that monoculture in small scale is eassible by utilizing artificial diet, if the water quality is exposed to change. In this survey, the conversion ratio of the fish was relatively high whereas the growth rate was low.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Common carp ; Mono culture ; Pellet ; Fiber glass tank ; Cyprinus carpio ; Feeding ; Weight ; Growth Rate ; Artificial diet
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 21pp.
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  • 3
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    Rearing of common carp (Cyprinus carpio) in fiber glass tanks with pellet feeding (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25317 | 18721 | 2018-09-11 09:06:52 | 25317 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The intensive culture of common carp (Cyprinus carpio) evaluated in fibreglass tanks (2*2m) with feeding on pellet during 8 weeks. The fish (n=201)of common carp selected from three treatments along with three replicates as the average of fish weight was less than 100(g )which divided into 〈50(g), 50-70(g) and 70-100(g).At the first experiment , there is no statistically significant difference between fish weight in relative to replicate treatment (P〉0.05).The common pellet food was chosen for feeding from market as fish were fed by the mean of 4% of their body weight a day. The result indicated that the mean of particular growth ratio at first treatment (0.54) has higher than second treatment (0.34) but in comparison with third treatment (0.46), there was no statistically significant difference (P〈0.05).Also, the conversion ratio at first treatment (5.28) and third treatment (6.09) was lower than second treatment (35.66) and third treatment (20.91) was lower than second treatment (24.24), (P〈0.05). This study showed that monoculture in small scale is feasible by utilizing artificial diet, if the water quality is exposed to change. In this survey, the conversion ratio of the fish was relatively high whereas the growth rate was low.
    Keywords: Aquaculture ; Iran ; Common carp ; Mono culture ; Pellet ; Fiber glass tank ; Cyprinus carpio ; Feeding ; Weight ; Growth Rate ; Artificial diet
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 21
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