| Shi Yongqiang,Sun Song,Li Chaolun,Zhang Guangtao,Yang Bo,Ji Peng.Changes in the population structure of Calanus sinicus during summer-autumn in the southern Yellow Sea[J].Acta Oceanologica Sinica,2019,38(8):56-63 |
| 夏秋季南黄海中华哲水蚤种群结构变化研究 |
| Changes in the population structure of Calanus sinicus during summer-autumn in the southern Yellow Sea |
| 投稿时间：2018-09-06 |
| DOI：10.1007/s13131-019-1435-1 |
| 中文关键词: 中华哲水蚤 发育期组成 性别组成 种群结构 黄海冷水团 生活史策略 |
| 英文关键词:Calanus sinicus stage composition sex composition population structure Yellow Sea Cold Water Mass life history strategy |
| 基金项目:The NSFC-Shandong Joint Fund for Marine Ecology and Environmental Sciences under contract No. U1606404; the National Natural Science Foundation of China under contract No. 41230963; the National Basic Research Program (973 program) of China under contract Nos 2011CB403604 and G1999043708; the Strategic Priority Research Program of the Chinese Academy of Sciences under contract No. XDA11020305. |
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| 中文摘要: |
| 中华哲水蚤是一种浮游桡足类，是黄海浮游动物的关键种，并且广泛分布于中国及日本沿海。夏季，中华哲水蚤在黄海冷水团中度夏，这对其种群延续具有重要作用，而其数量的变动进而会影响到海洋食物网的结构。为了调查度夏状态下的中华哲水蚤种群的恢复情况，本文研究了2002年8月至10月南黄海不同区域中华哲水蚤的丰度、发育期组成及性别组成。结果表明：8月受高温影响，中华哲水蚤繁殖率一般很低。8月中华哲水蚤在济州岛附近海域出现高繁殖率的原因是当地饵料充足且底层温度较适宜，但随着饵料质量在9-10月下降，中华哲水蚤在该海域的繁殖率也发生降低趋势。当9-10月温度下降时，中华哲水蚤在近岸浅水区域快速繁殖。而栖息在黄海冷水团中的中华哲水蚤在8-10月一直处于低繁殖率状态。中华哲水蚤处于繁殖期时雌性成体比例较高，说明可以利用中华哲水蚤成体的性别组成指示种群是否处于生殖状态。在调查期间，大量中华哲水蚤CV期桡足幼体聚集在黄海冷水团中，待秋冬季环境适宜时，它们会作为主要亲代种群进入年度第二次繁殖盛期，延续种群发展。 |
| 英文摘要: |
| Calanus sinicus is a calanoid copepod widely distributed in coastal waters of China and Japan, and over-summering strategies may have major impacts on their population dynamics which in turn affect local marine food web structure. The abundance, stage composition, and sex composition of the planktonic copepod C. sinicus were studied from August to October 2002 in the southern Yellow Sea to understand how its population recovers from the over-summering state. Results showed that C. sinicus had low reproduction in August due to high temperature, except in waters near the Cheju Island with rich food and moderate bottom temperature, but the reproduction rates here decreased in September-October as food availability declined. When temperature dropped in September-October, C. sinicus actively propagated in coastal shallow waters. However, reproduction rates of C. sinicus individuals inhabiting the Yellow Sea Cold Water Mass (YSCWM) remained low during the three months of the study. The percentage of C. sinicus females was high during the reproductive period, which suggests that the sex composition of adult C. sinicus may reflect whether or not the population is in the reproductive mode. Numerous fifth copepodite stage (CV) C. sinicus aggregated in the YSCWM in a suspended developmental stage during the three months of this study, and they potentially served as the parental individuals for population development when conditions became optimal for reproduction later in the year. |
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