Performance analysis of tetraploid striped catfish (Pangasianodon hypophthalmus) resulting from heat shock induction

Striped catfish tetraploid induction through heat shock that carried out in this study is not intended to produce on growth fries.But form a broodstock triploid fries cross breeding without any physical process.The from the previous were screened or selected by observing maximum number of nucleoli fin cells.The individuals used performance test was 105 which placed three different concrete tanks.The results showed striped more significant than diploid with difference daily weight percentage about 0.497% and 0.158% for length but insignificant differences FCR SR.In gonadal development based histological observations, it shown each both male female at same level maturity.Female gonads previtellogenic oocytes vitellogenic oocytes, males are dominated stage spermatocytes spermatozoa.This histology also shows us gonad still stage, while had entered mature ready be spawned.