Abbreviated Larval Development of Fresh-water Atyid Shrimp, Caridina brevirostris Stimpson from Iriomote Island of the Ryukyus (Decapoda, Atyidae)

摘要

The atyid shrimp Caridina brevirostris Stimpson was reared in the laboratory from egg to young shrimp. This shrimp bears large eggs containing much yolk, and the egg hatches as a considerably advanced zoea of benthonic habit. The zoeal larva reaches the first juvenile stage passing through a megalopal stage by at least 3 days. In this report some characteristics of the larvae and juvenile are described and illustrated. The newly-hatched larva shows the adult form in all the appendages but the uropods. Until juvenile, the larvae do not take food, subsisting on the stored yolk.