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首页> 外文期刊>ICES Journal of Marine Science >Zooplankton spatial distribution along the South African coast studied by multifrequency acoustics, and its relationships with environmental parameters and anchovy distribution
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Zooplankton spatial distribution along the South African coast studied by multifrequency acoustics, and its relationships with environmental parameters and anchovy distribution

机译：多频声学研究南非海岸浮游动物的空间分布及其与环境参数和cho鱼分布的关系

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摘要

The Central Agulhas Bank (CAB) is an important component of the southern Benguela ecosystem. Despite relatively low primary production, secondary production supports large populations of mid-trophic-level pelagic fish. Exhaustive sampling of the Agulhas Bank ecosystem was performed during a routine acoustic biomass survey in November 2006. A TAPS-6 was deployed with near-simultaneous, plankton-net sampling. Concurrent collections of fish-school and environmental data permitted a detailed study of the water column. Zooplankton was classified by equivalent spherical diameter (ESD; mm): 0.0-0.35 (Class Ⅰ), 0.35-0.8 (Class Ⅱ), 0.8-2 (Class Ⅲ), and >2.0mm (Class Ⅳ). Clear relationships with environmental parameters were only evident at night on the CAB (west of 23°E) for Classes Ⅱ and Ⅲ. Class Ⅲ exhibited pronounced diel vertical migrations, whereas Class Ⅰ exhibited a reverse pattern. Also observed were the effects of anchovy predation on small zooplankton aggregated in areas of high chlorophyll a.
机译：中央Agulhas银行（CAB）是本格拉南部生态系统的重要组成部分。尽管初级产量相对较低，但次级产量却支持着大量的中营养水平中上层鱼类。在2006年11月的例行声学生物量调查中，对Agulhas Bank生态系统进行了详尽的采样。部署了TAPS-6，同时进行了浮游生物网采样。鱼类学校和环境数据的并发收集允许对水柱进行详细研究。浮游动物按等效球形直径（ESD； mm）分类：0.0-0.35（Ⅰ类），0.35-0.8（Ⅱ类），0.8-2（Ⅲ类）和> 2.0mm（Ⅳ类）。与环境参数的明确关系只有在晚上在Ⅱ级和Ⅲ级CAB（23°E以西）上才能看到。 Ⅲ类表现出明显的diel垂直迁移，而Ⅰ类表现出相反的模式。还观察到were鱼捕食对高叶绿素a区域中聚集的小型浮游动物的影响。

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  • 来源
    《ICES Journal of Marine Science》 |2009年第6期|1055-1062|共8页
  • 作者

    Anne Lebourges-Dhaussy; Janet Coetzee; Larry Hutchings; Gildas Roudaut; Cornelia Nieuwenhuys;

  • 作者单位

    Institut de Recherche pour le Developpement, BP70, 29280 Plouzane, France;

    Department of Environmental Affairs and Tourism, Marine and Coastal Management, Private Bag X2, Rogge Bay 8072, South Africa;

    Department of Environmental Affairs and Tourism, Marine and Coastal Management, Private Bag X2, Rogge Bay 8072, South Africa;

    Institut de Recherche pour le Developpement, BP70, 29280 Plouzane, France;

    Department of Environmental Affairs and Tourism, Marine and Coastal Management, Private Bag X2, Rogge Bay 8072, South Africa;

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  • 正文语种 eng
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  • 关键词

    agulhas; anchovy; benguela; multifrequency; TAPS-6; zooplankton;

    机译：针cho鱼本格拉多频TAPS-6;浮游动物;

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