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Influence of increased cod abundance and temperature on recruitment of northern shrimp (Pandalus borealis)

机译：鳕鱼丰度和温度升高对北部虾（Pandalusborealis）募集的影响

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摘要

Despite an increase in northern shrimp {Pandalus borealis) female biomass in the past years, the recruitment of the offshore population north and northeast of Iceland has remained very low. In this study, the influence of abiotic and biotic factors was studied in relation to shrimp recruitment. Two factors, cod (Gadus morhua) abundance and summer sea surface temperature (SST), were found to have a negative effect on offshore shrimp recruitment, explaining 71 % of the observed variation. Both cod abundance and temperature on the offshore shrimp grounds have increased in the past years, while recruitment has decreased and been at historically low levels since 2005. No significant relationship was found between recruitment and spawning biomass, indicating that recruitment variability is mainly driven by other factors. Cod abundance and summer SST are likely to affect different life stages of shrimp, as SST influences shrimp during its planktonic phase while cod abundance influences the demersal stage.
机译：尽管在过去的几年中北部对虾（Pandalus borealis）的女性生物量有所增加，但冰岛北部和东北部的近海种群的招募仍然很少。在这项研究中，研究了非生物和生物因素对虾募集的影响。已发现鳕鱼（加德斯·摩尔瓦）的丰度和夏季海面温度（SST）这两个因素对近海虾募集有负面影响，解释了所观察到的变化的71％。自从2005年以来，近海虾场的鳕鱼丰度和温度都增加了，而招募则有所下降，并且自2005年以来一直处于历史最低水平。招募和产卵生物量之间没有发现显着的关系，这表明招募变异性主要是由其他因素驱动的。因素。鳕鱼的丰度和夏季SST可能会影响虾的不同生命阶段，因为SST在浮游期影响虾，而鳕鱼的丰度则影响到沉没阶段。

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  • 来源
    《Marine biology》 |2013年第5期|1203-1211|共9页
  • 作者

    Ingibjorg G. Jonsdottir; Arni Magniisson; Unnur Skuladottir;

  • 作者单位

    Marine Research Institute, Skulagata 4, P.O. Box 1390,121 Reykjavik, Iceland;

    Marine Research Institute, Skulagata 4, P.O. Box 1390,121 Reykjavik, Iceland;

    Marine Research Institute, Skulagata 4, P.O. Box 1390,121 Reykjavik, Iceland;

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