南美白对虾与长吻鱼危生态混养试验OA

In order to study a new ecological culture model and reduce the farming risk of single species of Penae-us vannamei,the ecological polyculture experiment of P.vannamei and Leiocassis longirostris was carried out from June to October 2022,and compared with the traditional monoculture model of P.vannamei in ponds.The results showed that the average yield per unit of P.vannamei under the monoculture and polyculture mode was(4 011.3±1 083.6)kg/hm2 and(3 650.0±663.4)kg/hm2,respectively,the size was 70-90 tails/kg,40-70 tails/kg,respectively.The survival rate in monoculture and polyculture mode was significantly different which was(69.4±7.9)%,(45.4±5.0)%,respectively(P<0.05).The average stocking size of L.longirostris was(91.9±26.8)g/tail while the average harvest size was(449.3±103.7)g/tail.The stocking density was 1 500 tails/hm2,and the survival rate was(98.0±1.9)%.The average unit profit of the polyculture mode was 29 170 CNY/hm2 higher than that of the monoculture mode.The results indicated that the breeding income of P.vannamei under the polyculture mode can be guaranteed with almost no increase in other cultural costs,and at the same time obtained better bene-fit of L.longirostris,thus improving the economic benefits of aquaculture.