| 低氧对中华哲水蚤存活和繁殖影响的实验研究 |
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| 引用本文： | 王巧宁,颜 天,周名江.低氧对中华哲水蚤存活和繁殖影响的实验研究[J].海洋科学,2013,37(2):12-16. |
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| 作者姓名： | 王巧宁 颜 天 周名江 |
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| 作者单位： | 1. 中国科学院 海洋研究所, 山东 青岛 266071
2. 中国科学院 研究生院, 北京 100049 |
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| 基金项目： | 国家重点基础研究规划项目(2010CB428705); 中国科学院知识创新工程重要方向项目群(KZCX2-YW-Q07-02); 国家自然科学基金委资助项目(41121064, 41176100) |
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| 摘 要： | 为研究低氧对海洋浮游生物关键种存活、繁殖等的影响,作者采用了实验室模拟低氧环境的方法,研究了低溶解氧(dissolved oxygen, DO)浓度对中华哲水蚤(Calanus sinicus)致死率、产卵和孵化的影响.研究发现,中华哲水蚤对低氧环境比较敏感,当DO质量浓度为2 mg/L左右时,中华哲水蚤会在1 h内全部死亡;当DO质量浓度为3 mg/L左右时,中华哲水蚤会在96 h内全部死亡;当DO质量浓度为4~6 mg/L 时,基本无死亡,但对中华哲水蚤的产卵有明显抑制作用,首次产卵时间推迟,产卵周期缩短.当DO质量浓度为4 mg/L时,基本不产卵,当DO质量浓度为6 mg/L时,产卵量也仅为常氧组的15%左右.当DO质量浓度为4~6 mg/L时,中华哲水蚤所产卵的孵化率为常氧组的60%左右,但差异不显著.可见,低氧对中华哲水蚤的存活和繁殖均有抑制作用,长时间低氧很可能会降低中华哲水蚤的种群数量,甚至改变海洋生态系统结构.
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| 关 键 词： | 低氧 中华哲水蚤(Calanus sinicus) 死亡率 产卵率 孵化率 |
| 收稿时间： | 2012/5/25 0:00:00 |
| 修稿时间： | 2012/11/22 0:00:00 |
The effects of hypoxia on survival and reproduction of Calanus sinicus |
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| Abstract: | The mortality rates and reproduction of Calanus sinicus at different concentration of dissolved oxygen (DO) were investigated. The results showed that when DO declined to 2 mg/L, C. sinicus all died in 1 h. When DO declined to 3 mg/L, C.sinicus all died in 96 h. When DO was 4-6 mg/L, basically there was no death. But the spawning rate of C. sinicus could be significantly inhibited under this hypoxia condition. When DO was 4 mg/L, almost no spawn. When DO was 6 mg/L, the total spawning amount was only 15% of nornoxic group. When DO was 4-6 mg/L, the hatching rate was 60% of nomixic group. Therefore, hypoxia inhibits both survival and reproduction of C. sinicus. Long time hypoxia would reduce the population quantities of C. sinicus and even change the structure of ecosystem. |
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| Keywords: | Calanus sinicus mortality rate spawning rate hatching rate |
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