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Irani A, Agh N. Optimization of Stocking Density for Beluga (Huso huso) and Persian Sturgeon (Acipenser persicus) culture. JFST 2019; 8 (1) :15-22
URL: http://jfst.modares.ac.ir/article-6-28782-en.html
1- Artemia & Aquaculture Institute, Urmia University, Urmia, Iran , a.irani@urmia.ac.ir
2- Artemia & Aquaculture Institute, Urmia University, Urmia, Iran
Abstract:   (5512 Views)
Aims: In this research, we investigated the effects of stocking density on growth performance and survival rate of Persian sturgeon and Beluga.
Materials and Methods: Stocking densities for treatments 1-5 of Persian sturgeon in stages 1 were 6, 8, 10, 12 and 14 fish/l (initial weight: 116mg) and in stage 2 were 1, 2, 3, 4 and 5 fish/l (initial weight: 2218/6mg). Stocking densities of five months old Beluga juveniles (initial weight: 109.95g) for treatments 1-5 were 80, 100, 120, 140 and 160 fish/m3 in each 250-liter tank respectively.
Findings: Growth and feeding parameters were affected as the stocking densities increased in both species. In stage 1 in terms of weight, SGR and food efficiency, treatments 1 and 2 showed significantly higher values (p<0.05) comparing with treatment 5, treatments 4 and 5 and all treatments respectively. In stage 2, there are significant differences amongst the all treatments in terms of weight and SGR except treatments 3 and 4. Food efficiency in treatment 1 was significantly higher (p<0.05) than the rests except treatment 2. In Beluga, there were significant differences amongst all treatments except treatments 3 and 4 in terms of weight, SGR, and food efficiency and the highest values were observed in treatment 1.
Conclusion: The best stocking densities for stage 1 and 2 of Persian sturgeon were 8-10 and 1-2 fish/l respectively and for Beluga, juveniles were 80-100 fish/m3.
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Article Type: Original Research | Subject: Aquaculture
Received: 2017/12/30 | Published: 2019/03/19

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