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首页> 外文期刊>ICES Journal of Marine Science >Pitfalls and guidelines for 'recycling' models for ecosystem-based fisheries management: evaluating model suitability for forage fish fisheries
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Pitfalls and guidelines for 'recycling' models for ecosystem-based fisheries management: evaluating model suitability for forage fish fisheries

机译：基于生态系统的渔业管理的“回收”模型的陷阱和准则：评估草料渔业的模型适用性

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摘要

Ecosystem models have been developed for many marine systems to provide guidance on fisheries management strategies that protect key ecological functions. These models are commonly "recycled", i.e. applied to new questions or policy concerns after the initial phase of model development, testing, and application. Because decisions about the model structure are typically based on the intended model use, it is important to recognize limits in the capacity of models to address questions for which they were not specifically designed. Here, we evaluate existing foodweb models in the context of their ability to identify key forage species in foodwebs and to test management strategies for fisheries that target them. We find that the depth and breadth with which predator species are represented are commonly insufficient for evaluating sensitivities of predator populations to forage fish depletion. We demonstrate that aggregating predator species into functional groups creates bias in foodweb metrics such as connectance. Models also varied considerably with respect to the extent that they have been tuned or fitted to retrospective patterns and the degree to which key sensitivities are identified. We use this case study to provide several general recommendations when "recycling" ecosystem and foodweb models. Briefly, we suggest as routine procedure careful scrutiny of structural model attributes, of scales at which ecological processes are included, and quality of fits for key functional groups.
机译：已经为许多海洋系统开发了生态系统模型，以为保护关键生态功能的渔业管理战略提供指导。这些模型通常是“回收的”，即在模型开发，测试和应用的初始阶段之后应用于新问题或政策关注。由于有关模型结构的决策通常基于预期的模型用途，因此重要的是要认识到模型在解决未明确设计的问题的能力方面的局限性。在这里，我们根据现有食物网模型的能力来评估它们，以识别食物网中的关键饲草物种并测试针对它们的渔业管​​理策略。我们发现，代表捕食者物种的深度和广度通常不足以评估捕食者种群对饲草鱼耗竭的敏感性。我们证明将捕食者物种聚集到功能组中会在食物网指标（例如连通性）中产生偏见。关于模型已调整或适合追溯模式的程度以及确定关键敏感度的程度，模型也有很大不同。当“回收”生态系统和食物网模型时，我们使用此案例研究提供一些一般性建议。简而言之，我们建议作为常规程序，仔细检查结构模型的属性，包括生态过程的规模以及关键功能组的适合质量。

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