Effect of long-term starvation and restricted feeding on growth performance and body composition of juvenile Siberian sturgeon (Acipenser baerii Brandt 1869)

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Abstract

The present study was designed and performed to investigate the eefect of long-term some feeding
strategies (starvation, restricted feeding at rate of 1% biomass per tank and satiate feeding as control)
on growth performance and body composition of juvenile Siberian sturgeon (Acipenser baerii Brandt
1869) for 8 weeks. In this regard, 270 juveniles Siberian sturgeon (average weight 54 ± 6/27 g and
density 1.5 g/l) were distributed in three treatments (with three replicates) in 9 fiberglass tanks (1050
l). For all fish in each tank, body weight and total length were individually recorded at a biweekly
interval. At the termination of the experiment period, five fish per replicate were caught randomly for
proximate composition. Results showed that growth performance of Siberian sturgeon was affected
significantly by starvation and restricted feeding periods. Moisture and lipid contents were differed
significantly in all treatments which the highest moisture and lipid contents were observed in starved
and control fish, respectively. Protein content in starved fish was significantly lower than other groups,
whereas ash contents were not significantly different among the treatments. In general, weight loss and
other growth factors of juveniles siberian sturgeon during the food shortage were refered to mobilizing
the body lipid reservesand then body protein sources and replacing with water. In fact, juvenile
Siberian sturgeon can conserve body protein stores better than lipids during the food shortage period

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Iranian Scientific Fisheries Journal
Volume 22, Issue 3 - Serial Number 84
May and June 2013
Pages 91-102

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