摘要
野生半滑舌鳎必须经过驯养后才能做为人工养殖亲鱼使用.试验结果表明,定置网捕获的半滑舌鳎比拖网捕获的成活率高,专门驯养比虾池粗养成活率高.获取野生鱼时的水温与驯养成活率关系密切,5、6、7月份,水温12～22℃时,驯养成活率为50%;8、9月份,水温高于22℃时,驯养成活率为0;11月份水温17.2～12.4℃时,成活率62.9%;12.4～7℃时,成活率36.8%.2003年5月22日～12月5日,共获取野生鱼165尾,驯养成活68尾,成活率41.2%.野生雌鱼随性腺发育程度的增加其驯养难度加大.野生鱼开口摄食是驯养成功的关键因素之一,活沙蚕是好的开口饵料.营造好的驯养环境和及时药物处理能缩短驯养时间和提高成活率.驯养雌、雄性比以1:3～4为宜.借助生殖调控措施,春、夏季获取的野生鱼秋季就可产卵,好卵占23.4%.
Wild semi-tongue sole can be used as broodstocks through domestication in cap- tivity. The experiment results showed that the survival rate of domestication of wild semitongue captured by set-net is higher than that captured by trawl,and the survial rate of demesti cation of wild semsi-tongue sole domesticated specially in tank is higher than that extensivly domesticated in pond. It is also closely related to the temperature at which the wild fish is captured. The survival rate is 50% at 12-22℃ of water temperature in May, July, and June. When the water temperature is above 22℃ in August and September,the survival rate is zero. When the temperature reduces to 17.2 - 12.4℃ in November, the survival rate is 62. 9%. When the temperature reduces to 12. 4-7℃ continuously, the survival rate is 36.8%o. Sixty- eight individuals were survived among 165 captured wild fish from May 22, 2003 to December 5, 2003. The survival rate is difficult with the maturity of 41.2%o. The domestication of gonad development. It is one wild females became more and more of the key factors of successful do-mestication when the wild begin to feed. Live clamworm is a good kind of initial diet for the wild fish. Good environment and timely drug treatment can reduce domestication time and enhance survival rate. The ratio of female to male is 1 ： 3-4 in captivity. The wild fish captured in spring can spawn in autumn by use of reproductive control method. The viable egg rate is 23.4 %.
出处
《海洋水产研究》
CSCD
北大核心
2005年第6期6-10,共5页
Marine Fisheries Research
基金
国家863高技术研究发展计划项目(2002AA603011和2004AA603320)资助
关键词
野生鱼
半滑舌鳎
驯养
成活率
Wild fish Semi-tongue sole Domestication Survival rate
