饲养密度与饵料密度对花尾胡椒鳃仔稚鱼生长和存活的影响

Effects of Rearing Density and Prey Concentration on Growth and Survival Rate of Larvae and Juvenile of Plectorhynchus cinctus

2001年5月至6月间,在集美大学水产学院水产试验场,就饲养密度和饵料(卤虫无节幼体)密度对花尾胡椒鲷仔稚鱼生长及存活的影响进行了实验,并对各组间的差异性进行了方差分析。实验结果表明,在同等饵料密度条件下,饲养密度小,仔稚鱼生长快,个体大,但成活率较低;饲养密度大,仔稚鱼成活率较高,但生长慢,个体小。在相同饲养密度条件下,饵料密度大,仔稚鱼生长快,个体大,但成活率较低;饵料密度小,成活率较高,但生长慢,个体小。饵料密度为0.5～1个/mL和1～2个/mL,成活率较高。饵料密度为2～4个 /mL,仔稚鱼个体长得快又大,但成活率较低。综合生长和成活率两项指标,花尾胡椒鲷仔稚鱼的饲养密度和卤虫无节幼体的密度分别以10尾/L和1～2个/mL较为适宜。

This paper deals with the effects of rearing density and prey concentration on foraging, growth and survival rate of larvae and juvenile of Plectorhynchus cinctus which are conducted in May and June, 2001. The result showed that the larvae and juvenile grew faster but had lower survival rate with the lower rearing density under the same prey concentrations or with the higher prey concentrations under the same rearing density. Consider the growth and survival rate, the most optimum rearing density of larvae and juvenile of Plectorhynchus cinctus is 10 ind. /L and the most optimum prey concentration is 1-2 ind. /mL.