| 摘要: |
| 于1994年4月(春季)和11月(秋季)在东海410站(124°59′E, 29°32′N,水深85m)对浮游动物的昼夜垂直移动变化规律进行24h定点连续观测。结果表明,春季和秋季浮游动物总数量的昼夜垂直移动变化均不明显,其数量主要分布在0–10m的表层水域;在桡足类的优势种中,个体较大的中华哲水蚤第V期和成体、精致真刺水蚤,以及磷虾类的中华假磷虾和太平洋磷虾等,其昼夜垂直移动比较明显。而一些个体较小的种类,如小拟哲水蚤、近缘大眼剑水蚤和其他种类的幼体、被囊类的优势种长尾住囊虫等,无论是在春季还是在秋季,它们的昼夜垂直移动均不明显,主要集中在0–10m的表层水域。 |
| 关键词: 东海 浮游动物 昼夜垂直移动 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金重点资助项目49636210号 |
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| PRELIMINARY STUDY ON THE DIURNAL VERTICAL MIGRATION OF ZOOPLANKTON IN THE EAST CHINA SEA |
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WANG Ke, WANG Rong, GAO Shang-Wu
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Institute of Oceanology, The Chinese Academy of Sciences, Qingdao, 266071
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| Abstract: |
| The diurnal vertical migration of zooplankton was studied at the time-series sampling station 410 (124°59′E, 29°32′N) in the East China Sea in April and November 1994. The results show that maximum density of zooplankton mainly distributed in the water layer from surface to 10m depth and the diurnal vertical migration was not very serious either in spring or in autumn. Data analyzed indicates that there are two types of vertical migration pattern:
1) Larger copepods such as Calanus sinicus and Euchaeta concinna, and two species of Euphausiacea, Pseudeuphausia sinica and Euphausia pacifica showed a remarkable diurnal vertical migration due to their swimming ability.
2) Small copepods such as Paracalanus parvus and Corycaeus affinis and the nauplius of large copepod species and the predominant species of Tunicate, Oikopleura longicauda, did not show obvious diurnal vertical migration. All these species have their maximum density in the 0–10m water layer. |
| Key words: The East China Sea, Zooplankton, Diurnal vertical migration |
