Effects of stocking density on the growth, survival and final production the Pacific white shrimp (Litopenaeus vannamei) in Gomishan region of Golestan province

Subject Areas : New Technologies in Aquaculture Development

رضا  اکرمی ¹ (دانشیار گروه شیلات، واحد آزادشهر، دانشگاه آزاد اسلامی، آزادشهر، ایران)

Received: 2022-11-06 Accepted : 2022-11-06 Published : 2022-08-23

Keywords: growth, Gomishan, Survival, stocking density, Keywords: Litopenaeus vannamei,

Abstract :

The determination of optimal levels of stocking density can enhance feed efficiency and growth and contribute to access the best usage of the culture system. The aim of this research was determine of suitable stocking density of Litopenaeus vannamei under pond condition on the Gomishan region of Golestan province.post-larvae of this species of shrimp on the stage of PL11 were stocked at 30, 40 and 50 pcs/m2 in six outdoor earthen ponds (each 5000m2 area and 180cm depth). The average final weights were 13.85, 12.3 and 11.35 gram for shrimp stocked at 30, 40 and 50 pcs/m2 respectively. Survival rates at the mentioned stocking density were 81.5, 69.7 and 66.1% respectively. Production of cultured shrimp experimental treatments were 1744, 1733 and 1769 kg respectively and showed no significant differences (p> 0.05).Finally it could be recommended that suitable stocking density for economical production of this species of shrimp is 30 pcs/m2  under earthen pond condition with using of Caspian sea brackish water.