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THE INFLUENCE OF FEEDING INTENSITY ON GROWTH PERFORMANCE OF RAINBOW TROUT JUVENILS.

THE INFLUENCE OF FEEDING INTENSITY ON GROWTH PERFORMANCE OF RAINBOW TROUT JUVENILS.

Authors :
Creţu, Mirela
Cristea, V.
Dediu, Lorena
Andrei (Guriencu), Raluca Cristina
Source :
Lucrări Ştiinţifice: Seria Zootehnie. 2017, Issue 67, p161-164. 4p.
Publication Year :
2017

Abstract

The purpose of this experiment was to evaluate how feeding intensity influence the growth performance of juvenile rainbow trout (Oncorhynchus mykiss) reared in a recirculating system. A number of 152 rainbow trout with an average weight of 174.41±0.73 g were divided into four rearing units in order to create the same stocking density (20 kg/m3). The fish were fed a 41% protein feed. Two variants were compared V1 (B1, B2) and V2 (B3, B4), with repetition. In V1- 1.0% feed from total biomass and a double amount of feed in V2-2.0% from total biomass. At the end of the experiment were obtained average body mass of 224.09±0.20 g in variant V1 and 245.59±0.73 g in variant V2. Specific growth rate (SGR) varied as follows: V1-0.95 g% / day, V2- 1.33 g% / day. Regarding the feed conversion factor (FCR), the better values were obtained in V1 variant -0,93 g feed/g gain biomass, while in V2 we obtain a value of FCR-1.22g feed/g gain biomass. The parameters of fish growing showed that changing the quantity of fodder, the fish growing was positively influenced. [ABSTRACT FROM AUTHOR]

Subjects

Subjects :
*RAINBOW trout
*BIOMASS

Details

Language :
English
ISSN :
14547368
Issue :
67
Database :
Academic Search Index
Journal :
Lucrări Ştiinţifice: Seria Zootehnie
Publication Type :
Academic Journal
Accession number :
138335323