Transient responses of fished populations to marine reserve establishment
Transient responses of fished populations to marine reserve establishment
复制标题
捕捞种群对海洋保护区建立的瞬时反应
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
L. Barnett
中科院分区：
文献类型：
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作者：
J. White;L. Botsford;A. Hastings;Marissa L. Baskett;D. Kaplan;L. Barnett
在实施禁捕海洋保护区之后，通常要进行监测，以确保保护区达到预定目标，例如增加鱼类物种的丰富度。影响保护区内丰度是否会增加的因素有很好的特征；然而，这些结果是基于人口模型的长期均衡。在这里，我们使用一个普通鱼类种群的年龄结构模型来分析短期的瞬时响应。我们表明，鱼类种群可能需要几十年的时间才能达到保护区后的平衡。与此同时，短期的暂态动态占主导地位。在过渡阶段，无论最终的长期结果如何，种群丰度要么保持不变，要么减少，要么呈现单代振荡。对于捕捞强度较大、成熟期年龄较大、自然死亡率较低和幼虫连接性较低的种群来说，这种瞬时动态更长、更具振动性。我们提供了基于人口统计数据的衡量标准，以描述这些储备后瞬时动态的重要特征。
Implementation of no‐take marine reserves is typically followed by monitoring to ensure that a reserve meets its intended goal, such as increasing the abundance of fished species. The factors affecting whether abundance will increase within a reserve are well characterized; however, those results are based on long‐term equilibria of population models. Here we use age‐structured models of a generic fish population to analyze the short‐term transient response. We show that it may take decades for a fished population to reach postreserve equilibrium. In the meantime, short‐term transient dynamics dominate. During the transient phase, population abundance could either remain unchanged, decrease, or exhibit single‐generation oscillations, regardless of the eventual long‐term result. Such transient dynamics are longer and more oscillatory for populations with heavier fishing, older ages at maturity, lower natural mortality rates, and lower larval connectivity. We provide metrics based on demographic data to describe the important characteristics of these postreserve transient dynamics.