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Effects of the dietary inclusion of biosilage produced by warmwater fish wastes on growth, survival rate and carcass composition of common carp (Cyprinus carpio)
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Ahmad Navazandeh   , Abolghasem Esmaeili Fereidouni * , Reza Safari |
| Faculty of Animal Sciences and Fisheries, Fisheries Department, Sari Agricultural Sciences and Natural Resources University (SANRU), Sari, Iran. |
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Abstract: (57 Views) |
This study was conducted to evaluate the effects of different levels of biosilage produced from the wastes of warmwater fish in the practical diet on growth performance, survival, and carcass composition of common carp (Cyprinus carpio). Juveniles (average initial weight of 48 ± 1.3 g) were fed in 15 fiberglass tanks with a useful capacity of 200 liters (with a stocking density of 20 fish per tank) and in five treatments including control diet (carp pellets with fishmeal and no biosilage), 25% (25% biosilage + 75% fishmeal), 50% (50% biosilage + 50% fishmeal), 75% (75% biosilage + 25% fishmeal) and diet containing 100% biosilage for 56 days. No significant difference was observed in the survival rate of fish between treatments (p≥0.05). Final body weight gain, specific growth rate, protein efficiency ratio and food conversion ratio in the diet of 50% (50% biosilage + 50% fishmeal) showed the best performance (p≤0.05); and inclusion levels higher than 50% and finally levels lower than showed performances. Crude protein content of carcass in fish fed 50% biosilage + 50% fishmeal and then 75% biosilage + 25% fishmeal showed significant differences compared to other groups (p≤0.05). The lowest amount of crude carcass lipid was obtained in fish fed with 50% biosilage + 50% fishmeal, which had a significant difference with other groups (p≤0.05). Based on the results, it is suggested that the possibility of substituting 50% biosilage obtained from warmwater fish waste instead of fishmeal in the diet of common carp led to increased growth, improved food conversion ratio and carcass quality.
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| Keywords: Bio-silage, Growth indices, Survival rate, Carcass composition, Common carp |
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Full-Text [PDF 486 kb]
(34 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2023/10/1 | Accepted: 2023/12/31 | Published: 2024/09/22
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