The effect of density on survival and cannibalism of Indomysis nybini (Opossum shrimp) in shrimp ponds of Kollahi port in Hormuzgan province

this research in 2014, the effects of density and cannibalism on survival, in Indomysis nybini was studied in Indian White Shrimp brood stock ponds of Kollahi port in Hormozgan province, Iran. Density experiment was conducted with 5 treatments, T1 =10, T2 = 20, T3= 30, T4 = 40 and T5 = 50 mysids per liter for 7 days. The treatments had 4 replications. The average water temperature was 23.8 ± 1 ° C during the experiment. In all experiments of one-liter beakers of filtered sea water was used .Artemia naupliuse was used for feeding. Cannibalism experiment was carried out with two treatments T1 with food and T2 without food. Water temperature was 24.6 ± 0.5° C during the experiment. Density experiment showed that there is significant statistical difference in survival rate among different treatments of mysid density (P≤0.05). There was no significant statistical difference in survival rate among treatments T2, T3 and T4(P≥0.05). The experiments results showed that there is significant statistical difference in survival rate among treatments T1, T5 (p≤0.05). Indomysis nybini mysid was the first mysid species that identified in Hormuzgan. Also the highest average survival rate was observed in density of (T1).This species of mysid is scavenger.