Investigating effect of different methods of eye ablation Penaeus semisulcatus for maturation

Abstract

In order to study on this subject, we chosed four methods of eye ablation (pinching, coutery, cutting, ligation) and without eye ablation with 5 treatments and two repeat. We prepared 10 tank by normal method in broodstock. We stocked 15 shrimps in the ratio of 1:2(male to female) per tank. ln each tank all of condition such as salinity, temperature, pH, light, type and colour of and change of water was equal for all tanks. The only variable factor was methods of eye ablation. After six week - period results showed us that respectively (30,25,20,15 and 5%) of shrimps in treatments reached to stage 4 and spawned. lt shows that the best methods for eye ablation are pinching and cautery on Psemisulcatus.