Impact of stocking density on whiteleg shrimp (Litopenaeus vannamei, Boone, 1931) culture in brackish water of the Caspian Sea
In this study, the effects of different primary stocking densities (45, 50, 55 and 60 shrimp/m2) of whiteleg shrimp postlarvae (PL12) were evaluated on the growth and survival rates. Brackish water (10.52±0.43 psu) was provided from the Caspian Sea. The experiments were performed in 12 circular concrete ponds with a sandy bed (area: 78m2) with four treatments and three replications for each treatment. The culture period was 75 days and the average water temperature was 27.4±1.79°C. The results showed that different stocking densities caused statistical significant difference in growth and survival rates among various experimental treatments (P<0.05). Increasing the stocking density resulted in decreasing the amounts of weight gain, survival rate (SR), specific growth rate ( SGR ) and the average daily growth ( ADG ). However, FCR was significantly different among treatments (P<0.05) and was not dependent on the primary stock density of postlarvae. The highest growth rate ( SGR =11±0.04 and ADG =0.25±0.01 gr/day/ind.), production (43.6±3.3 kg shrimp in 78 m2) and survival rate were observed in the lowest density treatment (45 shrimp/m2).
| Main Authors: | , , , |
|---|---|
| Format: | Journal Contribution biblioteca |
| Language: | Persian |
| Published: |
2017
|
| Subjects: | Litopenaeus vannamei, Whiteleg shrimp (Litopenaeus vannamei), Brackish water, Density, |
| Online Access: | http://hdl.handle.net/1834/12339 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|