Accounting for transient dynamics could improve the use of marine protected areas as a reference point for fisheries management
Accounting for transient dynamics could improve the use of marine protected areas as a reference point for fisheries management
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DOI：
10.1139/cjfas-2022-0125
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发表时间：
2023-01-01
影响因子：
2.4
通讯作者：
White，J. W.
中科院分区：
文献类型：
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作者：
Quennessen，V. I.;Babcock，E. A.;White，J. W.
渔业管理的生物参考点取决于相对于未捕捞生物量（枯竭）的现有种群状况估计数。海洋保护区内外的鱼类密度比，即密度比，可以作为数据贫乏管理的枯竭指标。然而，与时间滞后恢复到未捕捞状态后，保留实施的瞬态动态，使代理不准确的短时间尺度。我们评估了密度比管理规则，使用年龄结构，空间明确的模型，美国西海岸近岸鱼类保护区实施后，与方案包括抽样误差，招聘的变异性和自然死亡率的不确定性。在确定性的模拟，管理纳入时间滞后一般会导致更高的平均值和较低的变异性，生物量超过20年，但较低的平均产量相比，管理，没有。然而，当随机招聘，模拟之间的差异，由于随机性远远大于任何管理策略之间的差异。尽管如此，在某些情况下，考虑到时间滞后可能有助于避免在实施储备后不必要地增加收获努力。
Biological reference points for fishery management depend on estimates of current stock status relative to unfished biomass (depletion). The ratio of fish density outside to inside a marine reserve, the density ratio, could serve as a proxy for depletion for data-poor management. However, transient dynamics associated with time lags in returning to the unfished state following reserve implementation make that proxy inaccurate on short time scales. We assessed density ratio management rules using an age-structured, spatially explicit model of four US west coast nearshore fishes following reserve implementation, with scenarios encompassing sampling error, recruitment variability, and uncertainty in natural mortality. In deterministic simulations, management incorporating time lags generally resulted in a higher mean and lower variability in biomass over 20 years, but lower mean yield compared to management that did not. However, when stochastic recruitment was included, differences among simulations due to stochasticity were much greater than any difference in performance between management strategies. Nonetheless, in certain cases, accounting for time lags could help avoid unwarranted increases in harvest effort after reserve implementation.