Influence of Micro-algae Food on Growth of Larvae and Spat-set in Pearl Oyster Pinctada fucata (Gould)

摘要

Optimum concentration of Isochrysis galbana az food was 4000-5000 cells per day per larva of Pinctuclufrrcutu (Gould). Acceptability of Puvlovu luthrri,udChromrrlbiu frribiqetui.~. Dicruteria sp. and D~tnaliellrrs p. was tested. The effect of algal food on growth and spatset determined. Increase in growth wasudrecorded in Pavlova fed larvae than in I. galbana. Larvae fed with Dunaliella sp. did not survive beyond 13 days. Isochrysis and Chromulina at I : 1 ratio showedudbetter growth. Larvae fed with Dicrateria showed poor growth and higher spatset when fed singly or in conibination with Isochrysis.In I:l:l :combination ofudIsochrysis: Pavlova: Chromulina larval growth was better than that in IIsochrysis: Pavlova: Dicrateria combination.