TECHNOLOGICAL ASPECTS REGARDING REARING OF THE ACIPENSER RUTHENUS SPECIES, ALBINO VARIETY TO SECOND SUMMER OLD, IN BRATES STURGEONS STATION

Abstract

The Acipenser ruthenus (Linnaeus, 1758), albino variety, in the second summer
rearing to Brates sturgeons station from Galati was experimented. A number of 513
one year old sterlet were stocked in three Ewos fibreglass tanks, at an individual
mean weight of 40 g and total length of 20 cm, in the first day of June 2007. The
experiment had extended on 165 days, until half of November. During experimental
tries the fishes were monitoring permanently and the essential parameters of
technological water (dissolved oxygen, pH and temperature evolution) were
checked and recorded. Feeding was achieved with commercial granular food and
the conversion coefficient recorded was 1,3. Final body mean weight of sterlet was
130 g/ex. and the average length of 30 cm; the specific growth rate was 0,55g/day.,
i.e. 90 g/ex, and the survival percent recorded was 89,08 %.