研究了延迟投饵对裸项栉鰕虎鱼仔鱼存活、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。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PNR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。

Effects of delayed feeding on survival, feeding and growth of Ctenogobius gymnauchen larva were studied. 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 3-4 days. The initial feeding rate was lower, then increased to the peak at 2nd day after hatch and rapidly decreased then. 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 after hatch.

广东省自然科学基金项目（07003546）、（8151026005000002）；广东省科技计划项目（2007B080501005、2007B080501004）

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