RESEARCH REGARDING THE EVOLUTION OF CORPORAL WEIGHTES AND FOOD CONVERSSION ON JUVENILE OF SIBERIAN STURGEON (Acipenser baeri) RAISED IN RECIRCULATING SYSTEM
Keywords:
Acipenser baeri, recirculating system, body weight, feed conversionAbstract
The research was performed within the recirculating aquaculture system for
sturgeon growth, in Banat's Universsity of Agricultural Sciences and Veterinary
Medicine from Timisoara, on 2851 juveniles of Siberian sturgeons (Acipenser baeri),
aged between 132-175 days. Juveniles were maintained in 4 tanks with volume of
5.63 m3
, fed with granulated feed of 2 mm (44 & 22% PB and GB). Every 2 weeks
the weight and body length was determinate on an effective of 30 individuals from
each tank. Based on the obtained body weight, it has been established the food
quantity used and bioproductive indicators. Having the weight differences between
the individuals of a Siberian sturgeon population, it is needed at certain time
intervals to practice assortment by body development. At the age of 175 days,
Siberian sturgeons reached an average body weight between 90.13 ± 4.56 g and
197.63 ± 7.22 g and average body length between 28.73 ± 0.43 cm and 37.55 ± 0.38
cm. Individual values of minimum and maximum body weight varied between 32 g
and 307 g and body length between 24.5 cm and 42 cm. For the entire population of
Siberian sturgeons, there is a middle and high variability for the average body
weight and a small variability for the average body length. During the 43
experimental days, the 2851 Siberian sturgeons have acquired a real weight gain of
184.66 kg, with a conversion factor of 0.84 kilograms of feed / kg growth and an
index of feed conversion of 1.19 kilograms spore / kg feed consumed.
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