Over the past decade, efforts have been made to factor technical interactions into management recommendations for mixed fisheries. Yet, the dynamics underlying joint production in mixed fisheries are generally poorly captured in operational mixed fisheries models supporting total allowable catch advice. Using an integrated ecological–economic simulation model, we explore the extent to which fishers are likely to alter the species composition of their landings in a mixed fishery managed with individual transferable quotas, the Australian Southern and Eastern Scalefish and Shark Fishery. Our simulations capture three different types of joint production problems, highlighting the flexibility that exists in terms of achievable catch compositions when quota markets provide the economic incentives to adapt fishing practices to quota availability. These results highlight the importance of capturing the drivers of fishing choices when advising TAC decisions in mixed fisheries. We also identify a hierarchy of species in this fishery, with harvest targets set for primary commercial species determining most of its socio-economic performance.

中文翻译：

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混合渔业联合生​​产的灵活性及其对管理的影响

在过去十年中，已努力将技术互动因素纳入混合渔业的管理建议中。然而，混合渔业联合生​​产的动力在支持总允许捕捞量建议的混合渔业运营模型中通常很难捕捉到。使用综合生态-经济模拟模型，我们探讨了在澳大利亚南部和东部有鳞鱼和鲨鱼渔业这一由个人可转让配额管理的混合渔业中，渔民可能在多大程度上改变其上岸的物种组成。我们的模拟捕捉了三种不同类型的联合生产问题，突出了当配额市场提供经济激励以使捕捞实践适应配额可用性时，可实现的渔获量构成方面存在的灵活性。这些结果强调了在为混合渔业中的 TAC 决策提供建议时，捕捉捕捞选择驱动因素的重要性。我们还确定了该渔业中的物种等级，为主要商业物种设定的捕捞目标决定了其大部分社会经济绩效。