中华被毛孢作为饲料添加剂在南美白对虾养殖中的应用

Effects of Hirsutella sinensis as feed additive for Penaeus vannamei

本文观察中华被毛孢(Hirsutella sinensis)作为饲料添加剂对南美白对虾(Penaeus vannamei)的养殖效果。在南美白对虾饵料中添加5%中华被毛孢干燥菌体,经过30 d养殖,对虾的存活率、日增重率和日增长率分别提高了52%、30%和25%,饲料系数则降低了66%。同时,试验组对虾血清中溶菌酶和酚氧化酶活性分别提高了62.7%和23.9%,肝胰腺中碱性磷酸酶、酸性磷酸酶、超氧化物歧化酶、过氧化物酶和过氧化氢酶活性分别提高了11.4%、7.8%、35.0%、22.9%和324.2%,肌肉中的丙二醛含量则降低33%。试验表明,在饵料中添加中华被毛孢菌丝体可显著改善对虾的生长状况和免疫功能,为中华被毛孢菌丝体饵料添加剂的研发奠定了基础。

The effects of Hirsutella sinensis as feed additive for Penaeus vannamei were explored in this paper.When P.vannamei has been cultured for 30 days with the feed additive of the dried mycelia of H.sinensis at a ratio of 5%,the survival rate,daily gain rate,and daily growth rate of the tested shrimps were increased by 52%,30%,and 25%,respectively,while the feed coefficient was decreased by 66%.In the meanwhile,the lysozyme activity and phenoloxidase activity in the serum of these shrimps increased by 62.7% and 23.9%,respectively.Moreover,the activities of alkaline phosphatase,acid phosphatase,superoxide dismutase,peroxidase,and catalase in hepatopancreas were increased by 11.4%,7.8%,35.0%,22.9%,324.2%,as well as the content of malondialdehyde in muscle was decreased by 33%.The experimental results indicated that the growth performance and immune function of the tested shrimps would be significantly improved and laid the foundation for the development of the mycelia of H.sinensis as a feed additive for prawns.