중국새뱅이(십각目:새뱅이科)의 卵 및 幼生 發生

Larval and eggs development of the sawtooth caridina, caridina denticulta sinensis kemp(decapoda: atyidae), reared in the laboratory

The developmental process of larvae and eggs of the sawtooth caridina, Caridina denticulta sinensis Kemp, were observed. Spawned eggs were oval sphape. The diameter of the eggs was 1.22㎜ (1.08~1.36㎜). The eggs were attached on the abdomen of the shrimps. Fecundities of shrimps ranged from 50 to 120 eggs (mean: 85). The chromatopore was redish, like star and on the yolk. The present species shows the typical larval development of the group of atyids characterized by large egg. The larval hatched from the ovigerous female (23±1℃) over 20 days. Based on morphological characters the egg development was divided into six stages(nuclear division, cleavage, blastula, gastruation, rudiments of embryonic, hatching stage). The post-zoea was 2.85±0.5㎜ and had 7＋7 spines on the telson. After about 5 day, the uropods showed completed shape.