| 摘要: |
| 在食物中碳质量浓度为1. 0 mg/ L 的条件下,通过室内实验研究了不同食物对中华哲水蚤(Calanus sinicus) 和双刺纺锤水蚤(Acartia bifilosa) 无节幼体存活和发育的影响。结果表明,桡足类无节幼体发育速度与存活率之间存在正相关关系。单种食物中粒径较小的微绿球藻和三角褐指藻在桡足类开口摄食期是最适宜的饵料,但在发育后期以及整个发育期则粒径较大的亚心型扁藻和中肋骨条藻更为适宜。在相同的发育阶段,小型桡足类双刺纺锤水蚤和中型桡足类中华哲水蚤对于食物粒径的选择也是不同的。与非硅藻食物相比,硅藻并非桡足类无节幼体发育的理想食物,而单种硅藻对桡足类无节幼体发育的负面影响可以通过对混合食物的摄食得到有效的减弱。 |
| 关键词: 中华哲水蚤(Calanus sinicus) 双刺纺锤水蚤(Acartia bifilosa) 硅藻 存活率 发育率 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金计划资助项目(40576070) ;国家973 计划资助项目(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( K203205) |
|
| The effects of different diets on the survival and development of copepod nauplii |
|
|
| Abstract: |
| Under laboratory conditions, the influences of different diets on the survival and development of Acartia bifilosa and Calanus sinicus were investigated. The results showed that there is a positive relation between the survival of copepod nauplii and its development rate. Among all single species diets, the smaller particle size species (N. oculata and P. tricornutum) could support higher survival at first feeding duration, so did larger particle size species (P. subordiformis and S. costatum) during later development stage. In the same development duration, the ideal particle size scale of micro-copepod Acartia bifilosa was different from meso-copepod C. sinicus. The negative effects of single diet could be diminished efficiently by ingesting mixed food. |
| Key words: Calanus sinicus Acartia bifilosa diatoms survival rate development rate |
