两种藻类饲喂中华哲水蚤的繁殖差异  

Differences of reproduction of Calanus sinicus fed with two species of algae

作　　者：李捷[1] 蒲新明[2] 张展[1] 李超伦[1] 孙松[1] 

机构地区：[1]中国科学院海洋研究所海洋生态与环境科学重点实验室 [2]国家海洋局第一海洋研究所,青岛266061

出　　处：《海洋水产研究》2007年第1期38-44,共7页Marine Fisheries Research

基　　金：国家重点基础研究发展计划973项目(2002CB412406);中国水产科学研究院渔业环境和养殖生态重点开放实验室开放课题(K-03-05);国家自然科学基金项目(40576070)共同资助

摘　　要：通过室内实验研究了中华哲水蚤摄食三角褐指藻(Phaeodactylumtricornutum)和球等鞭金藻(Isochrysis galbana)后产卵率、孵化率变化。22d的实验时间,摄食三角褐指藻的中华哲水蚤平均产卵率为0.24±(0.07)/d,雌体存活率较低,摄食球等鞭金藻的产卵率为7.84±(1.12)/d,雌体存活亦较高。不论在藻类溶出液和过滤海水中摄食三角褐指藻后所产的卵孵化率都低于摄食球等鞭金藻者。这表明对照球等鞭金藻相比,硅藻三角褐指藻对中华哲水蚤产卵和孵化都存在明显的抑制作用。脂肪酸分析结果显示,在三角褐指藻细胞内,对桡足类繁殖十分重要的多不饱和脂肪酸(PU-FAs)和特定脂肪酸(ω3,ω6)的含量皆较低。The effects of two algae （Phaeodactylum tricornutum and Isochrysis galbana） on reproduction of copepod （Calanus sinicus） were investigated in laboratory. The results showed that the average egg production of Calanus sinicus fed with diatom （Phaeodactylum tricornutum） was 0.24±0.07/d, with the survival rate of female being relatively low. In contrast, relatively high egg production （7. 844±1.12/d ） and survival rate appeared in Calanus sinicus fed with flagellate （Isochrysis galbana）. In addition, the egg hatching rates of Calanus sinicus fed with Phaeodactylum tricornutum were lower than those of Calanus sinicus fed with Isochrysis galbana either in algal suspension or in filtered seawater. It was evident that diatom Phaeodactylum tricornutum could produce some inhibitory effect on both fecundity and hatching of Calanus sinicus, compared to Isochrysis galbana. Through fatty acid composition analysis, it was found that Phaeodactylurn tricornutum was inferior in contents of polyunsaturated fatty acids （PUFAs） and some specific fatty acids（ω3,ω6） which are necessary to copepod reproduction.

关 键 词：中华哲水蚤 三角褐指藻 球等鞭金藻 繁殖 脂肪酸 

分 类 号：Q14[生物学—生态学]