作　　者： ; ; ; (李建军）; (杨笑波）;

机构地区： 广东省实验动物监测所

出　　处： 《热带海洋学报》 2009年第6期112-116,共5页

摘　　要： 研究了延迟投饵对裸项栉鰕虎鱼Ctenogobius gymnauchen仔鱼存活、摄食及生长等方面的影响。实验设1个饥饿对照组(设10个平行)和5个延迟投饵组(各设4个平行),分别在孵化后第1、2、3、4和5d开始投喂褶皱臂尾轮虫Brachionus plicafilis。实验结果表明裸项栉鰕虎鱼仔鱼初次摄食时间为孵化后第1天,第3—4天时进入不可逆点期;初次摄食率以孵化后第2天最高,为54.55%,之后随日龄的增大而显著下降;仔鱼的存活率随延迟投饵天数的增加而显著降低;体长增长率的变化趋势与此相似。本研究表明:对裸项栉鰕虎鱼仔鱼进行投饵的最适时间为孵化后第1天。 The authors studied effects of delayed feeding on survival, feeding and growth of Ctenogobius gymnauchen larva. One hungry control group （ten parallels） and five delayed feeding groups （four parallels） were designed. The initial feeding began 1, 2, 3, 4 and 5 days after the larva were hatched out and the diet was Brachionus plicatilis. Results showed that the initial feeding time of Ctenogobius gymnauchen larva was the 1st day after hatch. The larva arrived at the point of no return （PNR） at the 3rd-4th day. The initial feeding rate was lower, then increased to the peak at the 2nd day after hatch and rapidly decreased afterward. The highest initial feeding rate was 54.55%. The survival rates were significantly decreased with increasing of delayed feeding time. Similar trends were observed in the length growth rate. The results indicated that the optimum initial feeding time for the larva is the 1st day after hatch.

关 键 词： 裸项栉鰕虎鱼 仔鱼 延迟投饵 存活 摄食 生长

领　　域： [农业科学] [农业科学]