Journal of Tropical Oceanography ›› 2010, Vol. 29 ›› Issue (6): 147-152.doi: 10.11978/j.issn.1009-5470.2010.06.147cstr: 32234.14.j.issn.1009-5470.2010.06.147

• Marine biology • Previous Articles     Next Articles

Effects of marine Bdellovibrio-and-like organism DA5 on larval survival and water quality in larval rearing of Litopenaeus vannamei

WEN Chong-qing1,2,3, LIANG Hua-fang1, DING Xian2,3, XUE Ming1, ZHOU Shi-ning3   

  1. 1. Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China; 2. Key Laboratory of Fishery Ecology Environment of Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China; 3. State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2009-01-08 Revised:2009-06-22 Online:2010-12-15 Published:2010-12-15
  • Contact: 周世宁。 E-mail:lsszsl@mail.sysu.edu.cn
  • About author:温崇庆(1974―), 男, 安徽省郎溪县人, 副教授, 博士, 主要从事海洋和水产微生物学研究。E-mail: wencq@gdou.edu.cn
  • Supported by:

    国家“863”项目(2007AA09Z448); 农业部渔业生态环境重点开放实验室开放基金;广东省渔业生态环境重点实验室开放基金项目(2006-8); 广东省海洋渔业科技推广专项项目(A200808A04) ; 广东海洋大学自然科学基金项目(0812067)

Abstract:

The authors studied the effects of marine Bdellovibrio-and-like organisms (BALOs) strain DA5, which was cultured from heat-killed Vibrio alginolyticus, on larval survival and water quality from nauplius stage to mysis stage of Litopenaeus vannamei. The results showed that the survival rate and metamorphic rate of mysis larvae treated with high concentration of DA5 (11500pfu•mL?1; HC) could be improved visibly, and the amounts of heterotrophs and vibrios in rearing water were re-duced or significantly reduced in the first 3 days. However, there were no obvious effects on larval survival and bacterial amount treated with low concentration of DA5 (1150pfu•mL?1; LC) during the larval rearing period. There were no significant differences in pH, chemical oxygen demand, and ammonia-N content in water body among the HC, LC, and control groups, except that the ammonia-N content in the HC group at mysis Ⅰ-Ⅱ stage was increased significantly. This study indicated that marine BALOs strain DA5 can be applied in larval rearing of shrimp as a promising biocontrol agent.

Key words: marine Bdellovibrio-and-like organism, Litopenaeus vannamei, larva, water quality