NATURAL SCIENCES
Journal of fundamental
and
applied researches
Feeding rates when using mixed production fodder to increase the accumulated body weight of Sterlet fish
2013. ¹1, pp. 75-81
Sorokina Natalya V. - Research Associate, Caspian Fisheries Research Institute, 1 Savushkin St., Astrakhan, 414056, Russian Federation, s.natashe@mail.ru
Lozovskiy Alexander R. - D.Sc. (Biology), Associate Professor, Astrakhan State University, 1 Shaumyana Sq., Astrakhan, 414000, Russian Federation, all.lozo@yandex.ru
The article indicates that mixed production fodder has been developed to improve the feeding rates of Sterlet fish under industrial acqucultural conditions. According to the paper, norms of feeding have been established using their functional dependences on the fishes’ relative daily body weight gain, feed conversion and temperature coefficient. The relative daily body weight gain has been predicted using the standard model of an accumulation of body weight. The critique relates that an accumulated coefficient of body weight was adopted for Sterlet within 0.070–0.087 g 1/3/day, and a feed conversion rate of – 1,5. The body weight and aquatic temperatures’ change limits, the paper relates, were 100–3000 g and +10…+24 C, respectively. The feeding norm calculations, for their part, were performed using computer spreadsheet Microsoft Excel 2003 with an accuracy of 0.001 %. As a result of the research, the document found that the Sterlet feeding rate varies within given parameters from 0.160 to 3.536 %. Moreover, detailed Sterlet feeding rates were provided in the form of tables within the studied parameters of fish body weight and aquatic environmental temperature. The blueprint states that the results of the study could be used for commodity-type cultivation of the Sterlet under industrial aquacultural conditions.
Key words: Feeding of fish,mixed fodder production,feeding rate,sturgeon fish,sterlet,relative daily gain of body weight,feed conversion,coefficient of accumulated body weight,standard model of accumulated body weight