Comparative of growth performance of SPF- and non-SPF originated Western white shrimp broodstock (Litopenaeus vannamei) under indoor condition in Hormozgan province
Subject Areas : New Technologies in Aquaculture Development
Keywords: Keywords: Growth factors, Survival percentage, Postlarvae, Imported SPF broodstock,
Abstract :
Abstract The expansion of the shrimp farming industry and the occurrence of disease in Iran caused a reserve import of SPF broodstock in 2019. But due to the lack of information about the growth and survival factors of their offspring, a comparative between their growth and survival factors with domestic generation offspring was conducted. In this study, 50 shrimp weighing 2 to 3 were stocked in 1ton tanks in 2 treatments including 1: shrimp from SPF broodstocks and 2: shrimp from domestic broodstocks with 3 replications during 90 days. Dissolved oxygen, temperature, and pH were measured twice a day, ammonia, nitrite, nitrate, and phosphate (mg/l) were measured weekly. Height and weight were measured every 10 days, FCR, SGR, BWI, WG and SR were calculated at the end. The results showed that temperature, salinity, oxygen, pH as well as ammonia, nitrite, nitrate and phosphate were in the appropriate range in both treatments. The maximum length 14.44(cm) and weight 19.81(gr) were in treatment 1 and had significant difference Ratio to treatment 2 (P≤0.05). The best FCR (1.66), WG (17.30), BWI (16.690), SGR (2.30) and SR (82) were related to treatment1, there was a significant difference in WG, FCR and SR with the treatment 2 (P≤0.05). Therefore, if use quality postlarvae and SPF broodstock we can expect to have good growth and survival rate in production. So it will cause stability and improve the quality of shrimp culturing.
_||_