Optimization of feeding rates for Beluga sturgeon (Huso huso)
Message:
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
Aims

Due to vital role of optimum feeding rate on success and profitability of an aquaculture practice, feeding rates were examined in different life stages of Beluga sturgeon.

Methods

Feeding rates were 5%, 7%, 9%, 11%, 13% and 15% in stage 1; 2%, 4%, 6%, 8%, 10% and 12% in stage 2; 1.5%, 2%, 2.5%, 3% and 3.5% in stage 3; 1.5%, 1.75%, 2%, 2.25% and 2.5% in stage 4. Farming durations of stages 1 to 4 were 10, 10, 42 and 56 days, as well as initial mean weights were 1.85, 7, 112.04 and 300.54 g, respectively.

Findings

Results showed that optimum feeding rates from growth and feeding parameters point of view were 9% and 5%, respectively, in stage 1. In stage 2 also optimum feeding rates were different from growth and feeding point of view, as they were 4% and 2%, respectively. For both aspects of growth and feeding parameters, optimum feeding rate was 2.5% of body weight in stage 3. In stage 4, the lowest food conversion rate was observed in the feeding rate of 1.5% and there were no significant differences between treatments from growth parameters point of view.

Conclusion

Growth and feeding parameters were affected with feeding rates in stages 1, 2 and 3. In stage 4, feeding rates influenced feeding parameters, but had no significant effects on growth performance.

Language:
Persian
Published:
Journal of Fisheries Science and Technology, Volume:8 Issue: 2, 2019
Pages:
109 to 116
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