人工生态条件下鲥鱼保种越冬的试验研究

EXPERIMENTS ON THE OVERWINTERING OF REEVES SHAD (TENUALOSA REEVESH) UNDER THE ARTIFICIAL ECOSYSTEM

在低盐度人工生态条件下鲥鱼保种越冬获得成功。在总密度为56.13尾/米~2(鲥鱼0.37尾、淡水白鲳55.76尾/米~2)的条件下,鲥幼鱼成活率达92.0％,3龄鱼达100％;在鲥鱼密度为8.99尾、淡水白鲳密度为7.80尾/米。的条件下,鲥幼鱼成活率达89.4％,3龄鱼达100％。试验表明,鲥鱼越冬期间可摄食人工饲料,无需投喂浮游生物;鲥鱼的商品化养殖越冬是可行的。

The successful experiments on the overwintering of reeves shad were achieved under the artificial ecosystem. Survival rate of shad juvenile and 3—year—old shad reached 92.0％ and 100％, respectively, at the total density of 56.13 ind. /m_2 (shad 0.37 ind. and Colossoma brachypomum 55.76 ind. /m_2); Survival rate of shad juvenile and 3—year—old shad reached 89.4％ and 100％, respectively, at the density of 8.99 ind. /m2 for shad and 7.80 ind. /mz for Colossoma brachypomum Experimental result shows that reeves shad also accepted artificial feeds during the period of overwintering and that commercial culture and overwintering of reeves shad is feasible.