多齿围沙蚕胚胎及游毛幼虫发育条件的研究

A study on the conditions of the embryonic and nectochaeta development of Perinereis nuntia Savigny

通过控制不同温度、盐度条件及投喂不同的饵料,观察了多齿围沙蚕胚胎、3～8刚节阶段游毛幼虫的发育情况。结果表明,多齿围沙蚕胚胎发育的适宜温度为18～25℃,适宜盐度为25～32;3～8刚节阶段游毛幼虫发育的适宜温度为24～32℃,适宜盐度为20～35;4～8刚节阶段游毛幼虫对微细的饵料均可摄食,蛋黄和酵母组比单细胞藻类组生长速度快,但成活率较低。

This paper dealt with the embryonic and nectochaeta development of Perinereis nuntia Savigny under different conditions of temperature, salinity and diet. The results showed that： The ranges of suitable temperature and salinity for embryonic development were 18-25℃ and 25-32 respectively; The ranges of suitable temperature and salinity for nectochaeta growth were 24--32℃ and 20-35 respectively;Tenuous diet could be ingested, but the survival rate of larval feeding on microalgae was higher than that of larval feeding on egg york or yeast.