Growth rate comparisons between sterlet (Acipenser ruthenus) and Russian sturgeon (Acipenser gueldenstaedti) xSiberian sturgeon (Acipenser baeri) hybrid in heated water culture

Sadowski, J.; Trzebiatowski, R.; Wielopolska, M.

Folia Universitatis Agriculturae Stetinensis. Piscaria 26: 63-69


ISSN/ISBN: 1506-168X
Accession: 003460289

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A study was carried out from 17 May to 16 September 1998 on year-old sterlet, 140 g mean individual weight, and Russian sturgeon (female) x Siberian sturgeon (male) hybrids, 315 g mean individual weight, kept in cages stocked with 25 individuals per cage. Each group involved two experimental treatments differing in type of feed used: Aller Aqua 45/15 (44.79% crude protein, 18.21% fat, 21.19% carbohydrate, 21.42 MJ gross energy) and Dan-ex 2545 (Dana Feed) (45.54% crude protein, 24.03% fat, 16.23% carbohydrate, and 23.05 MJ gross energy). The feed rations, identical in each treatment and group, were calculated relative to fish metabolic weight and varied within 1.13-2.0%. The study showed no differences in growth rate and feed utilization indices (feed conversion ratio, apparent net protein utilization, apparent lipid retention) between the groups and treatments (feeds). A significant effect of feed on body fat content was observed; the fat content was about 5% higher in the Dan-ex 2545-fed hybrid than in the hybrid fed the 45/15 feed. The corresponding difference in sterlet was 1.2%.