Search

The growth, survival rate, serum immunity and antioxidant enzymes, and economic benefits of Oplegnathus punctatus (350. 6±24. 3 g) reared in recirculating aquaculture system and offshore aquaculture net pen were investigated to evaluate the technical feasibility of the land-sea alternate mariculture model for Spotted knifejaw,Oplegnathus punctatus. Results showed that the average individual weight of Oplegnathus punctatus reached (547. 6±25. 2) g and the survival rates reached 95. 8% in the recirculating aquaculture system,while the average individual weight of Oplegnathus punctatus reached ( 735. 7 ± 27. 9) g and the survival rates reached 98. 3% in land-sea alternate aquaculture after 120 days culture. The contents of serum lysozyme (LZS),superoxide dismutase ( SOD),glutathione peroxidase (GSH-Px) and catalase ( CAT) in land-sea alternate aquaculture were significantly higher than those in recirculating aquaculture system (P<0. 05),40. 5%,43. 2%,42. 3% and 39. 8%,respectively. In addition,the net profit of land-sea alternate aquaculture was 128. 34% higher than that of recirculating aquaculture. The results indicated that the optimal growth performance, strong immunity, antioxidant activities and high economic benefits of Oplegnathus punctatus were obtained under the land-sea alternate aquaculture model,which provides the theoretical basis and data support for land-sea alternate aquaculture of Oplegnathus punctatus. [ABSTRACT FROM AUTHOR]