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首页> 外文期刊>Journal of Theoretical Biology >Possible ecosystem impacts of applying maximum sustainable yield policy in food chain models
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Possible ecosystem impacts of applying maximum sustainable yield policy in food chain models

机译:在食物链模型中应用最大可持续产量政策可能对生态系统产生的影响

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This paper describes the possible impacts of maximum sustainable yield (MSY) and maximum sustainable total yield (MSTY) policy in ecosystems. In general it is observed that exploitation at MSY (of single species) or MSTY (of multispecies) level may cause the extinction of several species. In particular, for traditional prey-predator system, fishing under combined harvesting effort at MSTY (if it exists) level may be a sustainable policy, but if MSTY does not exist then it is due to the extinction of the predator species only. In generalist prey-predator system, harvesting of any one of the species at MSY level is always a sustainable policy, but harvesting of both the species at MSTY level may or may not be a sustainable policy. In addition, we have also investigated the MSY and MSTY policy in a traditional tri-trophic and four trophic food chain models.
机译:本文介绍了最大可持续产量(MSY)和最大可持续总产量(MSTY)政策对生态系统的可能影响。通常,观察到在MSY(单物种)或MSTY(多物种)水平上的开采可能导致几种物种的灭绝。特别是,对于传统的捕食者-捕食者系统而言,在MSTY(如果存在)水平下以联合捕捞努力进行捕捞可能是可持续的政策,但如果MSTY不存在,则仅是由于捕食者物种的灭绝。在通俗的捕食者系统中,在MSY级别上捕捞任何一个物种始终是可持续的政策,但是在MSTY级别上捕捞两个物种都可能是可持续的政策,也可能不是可持续的政策。此外,我们还研究了传统的三营养和四营养食物链模型中的MSY和MSTY政策。

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