方斑东风螺幼苗初期饵料种类和投饵量对比喂养实验

The Comparative Feeding Experiment of Food Species and Food Regime at Early Stage of Babylona areolata Larvae

关键词:  幼苗  成活率  方斑东风螺  饵料

Key words:  larvae  survival rate  Babylonia areolata  food

摘要:

2004年和2005年分两次进行方斑东风螺(Babylona areolata)幼苗变态初期的饵料种类和投饵量的对比喂养实验,比较南美白对虾(Litopenaeus vannamei)、远海梭子蟹(Portunus pelagicus)、竹夹鱼(Trachuru sjaponicus)和文蛤(Meretrix meretrix)及其投量对螺幼苗的影响。实验螺均取刚转入底栖,壳长2~3mm的幼苗。经过20多天培育,幼苗壳长达4~18mm、成活率最高的是摄食南美白对虾的螺幼苗,为60%、最低是摄食文蛤的,为17%,各项综合指标均较好的是摄食竹夹鱼的螺幼苗。投喂量过大或不足都会导致螺幼苗成活率降低,投喂量的合理控制是影响方斑东风螺幼苗培育成活率的另一个关键。

Abstract:

The comparative feeding experiments were performed concerning food species and food regime at early stage metamorphosis of Babylona areolata larvae during 2004~2005.We compared the effect of food species, including Litopenaeus vannamei, Portunus pelagicus, Trachurus japonicus, Meretrix meretrix, and their food regime on Babylonia areolata larvae.Babylonia areolata juveniles, whic were just bottom settled and 2~3 mm in shell length, were used in this experiment.After 20 days or more rearing, the juveniles growed to 4~18 mm in shell length.The highest survival rate reached 60% coming from the juveniles eating Litopenaeus vannamei and the lowest one was 17% from those eating Meretrix meretrix, and the juveniles eating Trachurus japonicus had a relatively high survival rate and growing rate.The results indicated that excessive and insufficient food regime would reduce survival rate of Babylonia areolata larvae.Therefore, the moderate food regime was another key factor influencing the survival rate during the rearing Babylonia areolata larvae.