The Comparison of Growth Performance and Survival Rate of Sterlett (Acipenser ruthenus) and Siberian Sturgeon (Acipenser baerii) From Larvae to Fingerling

Document Type : Research Paper

Authors

1 BS.c Educated from Higher education and training center of Mirzakoochakkhan, Guillan, Rasht, Iran

2 Researcher of International Sturgeon Research Institute of the Caspian Sea, Guillan, Rasht, Iran

3 Member of Scientific Board in International Sturgeon Research Organization, Guillan, Rasht, Iran

4 Member of Scientific Board in Higher Education Center of Mirzakoochakkhan Guillan, Rasht, Iran

Abstract

This study was carried out on the growth and survival rates of Acipenser ruthenus and from larvae to fingerling stages. A total of 4000 larvae from each species were provided and stocked in 2 fiberglass tanks (2000 larvae in each tank with volume 3.2 m3). Food Conversion Ratio (FCR) for both species was 3.07 ± 0.3 in this period, which showed no significant difference statistically significantly (P>0.05). Based on these results, the mean weight of Acipenser ruthenus larvae was 21.8 ± 0.82 mg at the start phase of activated feeding and reached to 3 ± 0.35 g in fingerlings at the end after 76 days. The mean weight of Siberian sturgeon larvae was 23.7 ± 2.06 mg at the beginning of the study and reached to 2.8 ± 0.19 g at the end. Specific growth rate (SGR) in Acipenser ruthenus and Acipenser baerii was 2.77 ± 0.02% and 2.72 ± 0.02 percent, respectively that showed no significant difference. Survival rate in Acipenser ruthenus and Acipenser baerii were 45.5 ± 0.016 and 32.5 ± 0.15 that showed significant difference (P>0.05). Therefore, survival rate indices in Acipenser ruthenus were better than Acipenser baerii stocked in fiberglass tanks.

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