The effect of larger fish on growth performance of carp (C.carpio) in cage

In this study, it was aimed to determine the effect of size difference between large individuals and small individuals on growth performance during size grading of zero-aged mirror carp (Cyprinus carpio). 0 years old 1 to 3 g fry that have just completed the larval stage were stocked in cages placed in the pond at a rate of 20 fry / m3 and fed for 90 days. Trial groups; A group consisting of a small group (Smalls), consisting of 1 g and half 2 g (G1), consisting of half 1 g and half 3 g (G2). At the end of the experiment, it was observed that the individuals in the Control group (10,11 ± 2,56g) grew better than the others in the other groups (P <0.05). The G1 group consisting of 1 and 2g individuals had a better Food conversion ratio (1.4 ± 0.03) compared to other groups (P <0.05). As a result, it was observed that the size grading and different size combination between the groups had an effect on growth performance of common carp offspring, especially when they are stocked as 1 + 2 g, it is observed that good competition established and this situation has a positive effect on the development of bulk fish.