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首页> 外文期刊>Estuarine Coastal and Shelf Science >Abundance, seasonal patterns and diet of the non-native jellyfish Blackfordia virginica in a Portuguese estuary
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Abundance, seasonal patterns and diet of the non-native jellyfish Blackfordia virginica in a Portuguese estuary

机译：葡萄牙河口外来水母Blackfordia virginica的丰度，季节性模式和饮食

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摘要

Blackfordia virginica, a non-indigenous hydrozoan introduced in many systems around the world, has been observed in the Mira estuary, southwest of Portugal, since 1984. Monthly sampling (January 2013 January 2014) at a fixed location with high abundance of the medusae confirmed the occurrence of a seasonal cycle associated with temperature and photoperiod. The beginning of the medusa cycle occurred in May immediately after the spring zooplankton bloom during April. Examination of the gut contents of B. virginica medusae revealed that copepods, the most abundant group in the zooplankton community, were highly predated. Barnacle nauplii, decapod crustacean larvae and anchovy eggs were also identified in the guts. The medusae showed positive selection for copepods, and negative selection for barnacle nauplii, decapod crustacean larvae and anchovy eggs. The mortality rate of copepods (used as a model prey group) induced by medusae predation was estimated and showed the potential impact of this species in the ecosystem, ranging between 2.34 d(-1) and 0.02 d(-1), with a minimum copepod half-life of 0.30 days. (C) 2015 Elsevier Ltd. All rights reserved.
机译：自1984年以来，在葡萄牙西南部的Mira河口已观察到Blackfordia virginica（一种非本土的水生动物，已在全球许多系统中引入）。每月在固定地点进行采样（2013年1月，2014年1月），水母丰度很高与温度和光周期有关的季节性周期的发生。美杜莎周期的开始发生在四月份春季浮游动物盛开之后的五月份。对水生B. virginica medusae肠道含量的检查表明，co足类是浮游动物群落中数量最多的一组，早于人类。在肠道中也鉴定出藤壶无节幼体，十足类甲壳类幼虫和an鱼卵。水母对co足类动物显示出正选择，对藤壶无节幼体，十足类甲壳类幼虫和an鱼卵显示出负选择。估计了由美杜莎捕食引起的pe足类动物（用作模型猎物组）的死亡率，并显示了该物种对生态系统的潜在影响，范围在2.34 d（-1）和0.02 d（-1）之间，最小pe足类动物的半衰期为0.30天。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2015年第20期|212-219|共8页
  • 作者

    Marques F.; Chainho P.; Costa J. L.; Domingos I.; Angelico M. M.;

  • 作者单位

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, P-1749016 Lisbon, Portugal;

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, P-1749016 Lisbon, Portugal;

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, P-1749016 Lisbon, Portugal|Univ Lisbon, Fac Ciencias, Dept Biol Anim, P-1749016 Lisbon, Portugal;

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, P-1749016 Lisbon, Portugal|Univ Lisbon, Fac Ciencias, Dept Biol Anim, P-1749016 Lisbon, Portugal;

    Inst Portugues Mar & Atmosfera, P-1449006 Lisbon, Portugal;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Alien species; Hydrozoa; Jellyfish blooms; Mira estuary; Predation impact; Trophic ecology;

    机译：外来物种;水生动物;水母开花;米拉河口;捕食影响;营养生态学;

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