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首页> 外文期刊>ICES Journal of Marine Science >Empirically Modelling The Potential Effects Of Changes In Temperature And Prey Availability On The Growth Of Cod Larvae In Uk Shelf Seas
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Empirically Modelling The Potential Effects Of Changes In Temperature And Prey Availability On The Growth Of Cod Larvae In Uk Shelf Seas

机译：根据经验建模温度和猎物可利用性对英国架海鳕鱼幼虫生长的潜在影响

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It has been hypothesized that changes in zooplankton community structure over the past four decades led to reduced growth and survival of prerecruit Atlantic cod (Gadus morhua) and that this was a key factor underlying poor year classes, contributing to stock collapse, and inhibiting the recovery of stocks around the UK. To evaluate whether observed changes in plankton abundance, species composition and temperature could have led to periods of poorer growth of cod larvae, we explored the effect of prey availability and temperature on early larval growth using an empirical trophodynamic model. Prey availability was parameterized using species abundance data from the Continuous Plankton Recorder. Our model suggests that the observed changes in plankton community structure in the North Sea may have had less impact on cod larval growth, at least for the first 40 days following hatching, than previously suggested. At least in the short term, environmental and prey conditions should be able to sustain growth of cod larvae and environmental changes acting on this early life stage should not limit stock recovery.
机译：据推测，过去四十年来，浮游动物群落结构的变化导致了大​​西洋鳕鱼的生长和存活率降低，而这是造成年级差，导致种群崩溃和抑制恢复的关键因素。英国各地的股票。为了评估观察到的浮游生物丰度，物种组成和温度的变化是否可能导致鳕鱼幼虫生长较弱的时期，我们使用经验性对流动力学模型探讨了猎物的可获得性和温度对幼虫早期生长的影响。使用连续浮游生物记录仪中物种的丰富度数据对猎物的可用性进行参数化。我们的模型表明，至少在孵化后的前40天内，观察到的北海浮游生物群落结构的变化对鳕鱼幼体生长的影响可能比以前建议的要小。至少在短期内，环境和猎物条件应能够维持鳕鱼幼虫的生长，并且在此生命早期阶段起作用的环境变化不应限制种群的恢复。

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