Journal of Tropical Oceanography >
Effects of delayed feeding on survival, feeding and growth of Ctenogobius gymnauchen larva
Received date: 2007-11-26
Revised date: 2008-01-20
Online published: 2009-12-12
Supported by
广东省自然科学基金项目（07003546）、（8151026005000002）；广东省科技计划项目（2007B080501005、2007B080501004）
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.
Key words： Ctenogobius gymnauchen; larva; delayed feeding; survival; feeding; growth
WANG Guo-dong , ZHENG Yan-jing , LI Jian-jun , YANG Xiao-bo , HUANG Ren . Effects of delayed feeding on survival, feeding and growth of Ctenogobius gymnauchen larva[J]. Journal of Tropical Oceanography, 2009 , 28(6) : 112 -116 . DOI: 10.11978/j.issn.1009-5470.2009.06.112
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