Research regarding the evolution of corporal masses and feed conversion on sterlet (Acipenser ruthenus) juvenile raised in recirculating system
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2009, Vol 2, Issue 2
Abstract
The research was performed on 3375 specimens of sterlet juveniles (Acipenser ruthenus) maintained in five square pools (1.5 x 1.5 x 0.7 m; V=1.125 m3) and in a round pool (Ø=3 m; H=1 m; V=5.63 m3). Water temperature varied between 14-160C. Sterlet juvenile was fed with Dana Feed forage granulation 1.5 mm (52% raw protein and 13% raw fat). Body weight and body length on 30 individuals from each tank were determined every two weeks. Based on weighings of body mass and quantity of feed given calculations, it had been established bioproductive indicators at juvenile sterlets aged between 135-178 days. At the age of 178 days, the sterlet juvenile reached an average body mass that ranged between 56.60±2.19 g and 78.50±2.07 g, and an average body length that ranged between 23.83±0.29 cm and 27.22±0.23 cm. Individual values of minimum and maximum body mass were located between 30 g and 104 g and body length between 19 and 30 cm. During the 43 experimental days, the 3375 juvenile sterlets have acquired a real weight gain of 142.91 kg, with a specific consumption of feed of 0.79 kg feed/kg spore and an index of feed conversion of 1.27 kg spore/kg feed consumed. Keywords: Acipenser ruthenus, body weight, feed conversion, recirculating system.
Authors and Affiliations
Marian Bura, Zoltan-Tibor Szelei
Keywords
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