Feeding, growth, and survival of Engraulis mordax larvae reared in the laboratory
Feeding, growth, and survival of Engraulis mordax larvae reared in the laboratory
复制标题
实验室饲养的 Engraulis Mordax 幼虫的摄食、生长和存活
作者：
R. Lasker;H. Feder;G. Theilacker;R. C. May
本文介绍了用人工饲料成功培育北方鳀仔鱼的方法。幼虫被连续喂养的无甲藻Gymatriinium splendens，面盘的腹足类Bulla gouldiana，和无节幼体的卤虫盐。饲养容器的容量范围从4.5至510升进行了测试，较小的被认为是最有用的实验室实验。当E.在卵黄吸收后超过1.5天不进食mordax。比较了不同饵料对仔鱼生长的影响。拉弗德湾一串红以与喂食野生浮游生物的动物相同的速率生长1周，但没有保持该速率。E.以G.当面盘幼虫补充饮食时，单独的splendens没有显著差异。然而，当G.同时投喂三角梅和面盘幼虫。虽然仍然无法与以野生浮游生物为食的生长速度相匹配，但对海蛞蝓幼虫的生长速度有很大的改善。对所有饲料中的所有幼虫进行长度（L）与重量（W）分析。结果表明，无论饮食如何，体重都可以通过log W=3.3237 log L-3.8205的关系从长度最准确地计算。
Methods are described for the successful rearing of northern anchovy larvae (Engraulis mordaxGirard) on cultured foods. Larvae were fed successively on the unarmored dinoflagellate Gymnodinium splendens, the veliger of the gastropod Bulla gouldiana, and nauplii of the brine shrimp Artemia salina. Rearing containers ranging in capacity from 4.5 to 510 l were tested; the smaller ones were found to be most useful for laboratory experimentation. Irreversible starvation occurred when E. mordax were denied food for more than 1.5 days after yolk absorption. Growth rates of larval anchovies fed different diets were compared. Larvae fed G. splendens grew for 1 week at the same rate as animals fed wild plankton, but did not maintain this rate. Laboratory survival of E. mordax larvae on a diet of G. splendens alone, did not differ significantly when veligers supplemented the diet. However, when G. splendens and veligers were fed simultaneously to E. mordax larvae, growth rate was greatly improved, although still not matching the growth attained on a diet of wild plankton. Length (L) versus weight (W) analyses were made for all larvae at all diets. The results showed that weight could be calculated most accurately from length by the relationship log W=3.3237 log L-3.8205, regardless of diet.