饵料密度对花鲈仔鱼生长和存活的影响

Effects of prey concentrations on growth and survival of sea perch,Lateolabrax japonicus larvae

于2001年12月 ,在集美大学水产试验场 ,测定了不同的轮虫密度培育的花鲈(Lateolabraxjaponicus)仔鱼的摄食量、生长、存活率和耐饥饿能力。结果表明 ,饵料密度对花鲈仔鱼的摄食、生长和存活均有较大的影响。在轮虫密度为10个/mL的条件下 ,仔鱼的摄食量较大、生长最快、存活率最高、耐饥饿能力较强。当轮虫密度为20个/mL时 ,花鲈仔鱼的存活率降低、耐饥饿能力下降。当轮虫密度低于5个/mL,随着轮虫密度的降低 ,仔鱼摄食量下降、生长变慢、存活率降低、耐饥饿能力下降。

This paper reports the feeding rate,growth and survival rates of Lateolabrax japonicus larvae reared in different rotifer concentrations at Jimei university in December,2001.Results show that prey concentrations have great effects on the feeding rate,growth and survival rate of Lateolabrax japonicus larvae.At a rotifer concentration of10ind/mL in the water,larvae take in more food,growfaster and have a higher survival rate plus and they can survive for a longer time without food.Higher rotifer concentrations(20ind/mL)in the water improve feeding lower the survival rate and lower the ability of surviving food scarcity.When rotifer concentration is less then5ind/mL,Lower rotifer concentrations in the water result in a lower larval feeding rate,slower growth,lower survival rates and the larvae die sooner when food is removed.