Abstract
Growth and survival of hatchery-produced larvae of Siberian sturgeon were examined at satiation feeding levels using live Tubifex (diet 1) and three different dry diets (2, 3 and 4). A dry diet based on single-cell protein (SCP) and freeze-dried liver (diet 2) gave better results than commercial salmon starter diet (3) and a casein-based diet (4). Final weights after a 30-day growth trial were 960 and 1450 mg and survival was 47.8 and 53.4% for larvae fed diet 2 and live tubificids, respectively. High mortality at the beginning of the feeding trial was attributable to the initial quality of the larvae rather than to dietary treatments. It is concluded that live food can be totally eliminated from the initial diet of Siberian sturgeon larvae and that studies on the nutritional quality of the dry diets require more attention.
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