EFFECT OF COMBINED FEED COMPOSITION ON GROWTH AND DEVELOPMENT OF RAINBOW TROUT FRY
Abstract
A study on the influence of granulated combined feeds of different compositions on the growth anddevelopment of rainbow trout fry was conducted under conditions of Tomsk Region. Cultivation of fry in a production environment was performed in plastic rectangular tanks with in-line water. The juveniles were divided into two pulls, experimental and control, of 6,000 fish each, with stocking density of 250 pieces per 1 m2. The main source of animal protein in combined feeds for feeding trout juveniles was fish flour; that of vegetable protein was soybean meal and wheat flour. The juveniles of the trial group received Coppens granulated combined feed during 30 days, those of the control group were fed with РГМ-5В combined feed. The starting feed for trout fry should contain more animal protein and less vegetable one. In accordance with the conditions of the experiment, the total amount of animal protein in Coppens is 14.8 percent higher as compared with the control. The energy value of feeds was in the range of 20.5–22.9 MJ per kg of feed. Resulted from the studies, the more intensive growth of the juveniles from the trial group was established. A higher average daily gain of 70 g was observed in this variant, while it was 0.46 g in the control. An increase in the length of experimental fry doubled the control. The survival rate of experimental fry at the end of the growing period was 11.6 percent higher than in the control.
About the Author
R. SH. FAKHRUTDINOVA
Tomsk Agricultural Institute – the Branch of Novosibirsk State Agrarian University
Russian Federation
Russian Federation
19, Karl Marx St, Tomsk, 634050, Russia
Candidate of Science in Agriculture, Associate ProfessorReferences
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Review
For citations:
FAKHRUTDINOVA R.Sh. EFFECT OF COMBINED FEED COMPOSITION ON GROWTH AND DEVELOPMENT OF RAINBOW TROUT FRY. Siberian Herald of Agricultural Science. 2017;47(4):48-53. (In Russ.)
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