EFFECT OF STOCKING DENSITY ON GROWTH PERFORMANCE, FEED CONVERSION AND FISH PRODUCTION OF RAINBOW TROUT /ONCORHYNCHUS MYKISS/, CULTIVATED IN RACEWAYS
Dr. Stefka Stoyanova, Yordan S. Staykov
Abstract: One of primary factors determining high yields in fish farming is the optimum stocking density. The aim of the present study was to establish the effect of stoking density of rainbow trout (Oncorhynchus mykiss), cultivated in raceways on growth performance, feed conversion and fish production.
For this purpose, 30 000 fish were randomly distributed in 6 raceways (5 000 fish/raceway). In the beginning of the experiment trouts weighed 21-22 g. Two different stocking densities were investigated– 150 fish/m³ (SD1) in control group (C) and 125 fish/ m³ (SD2) in experimental group (E). Each group was run in three replications. The experiment’s duration was 60 days. The fish of experimental group exhibited better growth performance by 11.46% and higher fish production by 12.42%, compared to the control group (р≤0.001).
For this purpose, 30 000 fish were randomly distributed in 6 raceways (5 000 fish/raceway). In the beginning of the experiment trouts weighed 21-22 g. Two different stocking densities were investigated– 150 fish/m³ (SD1) in control group (C) and 125 fish/ m³ (SD2) in experimental group (E). Each group was run in three replications. The experiment’s duration was 60 days. The fish of experimental group exhibited better growth performance by 11.46% and higher fish production by 12.42%, compared to the control group (р≤0.001).
Keywords: stocking density, rainbow trout( Oncorhynchus mykiss), FCR, growth performance
Date published: 2017-02-22
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