Beverton and Holt’s (1957. On the dynamics of exploited fish populations. UK Ministry of Agriculture, Fisheries and Food. Fisheries Investigations, 2: 533 pp.) monograph contributed a widely used stock–recruitment relationship (BH-SRR) to fisheries science. However, because of variation around a presumed relationship between spawning biomass and recruits, the BH-SRR is often considered inadequate and approached merely as a curve-fitting exercise. The commonly used and simplified version of the BH-SRR has eclipsed the fact that in their classic monograph, the derivation accounted for mechanistic recruitment processes, including multi-stage recruitment with explicit cohort-dependent and -independent mortality terms that represent competition between recruits and extrinsic, cohort-independent factors such as the environment or predation as two independent sources of mortality. The original BH-SRR allows one to recreate recruitment patterns that correspond to observed ones. Doing so shows that variation in density-independent mortality increases the probability of overlooking an underlying stock–recruitment relationship. Intermediate coefficients of variation in mortality (75–100%) are sufficient to mask stock–recruitment relationships and recreate recruitment time series most similar to empirical data. This underlines the importance of variation in survival for recruitment and that Beverton and Holt’s work still provides a fundamental and useful tool to model the dynamics of populations.

中文翻译：

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生命早期阶段与密度无关的死亡率增加了忽视潜在库存-招聘关系的可能性

Beverton 和 Holt（1957 年。关于被开发鱼类种群的动态。英国农业、渔业和食品部。渔业调查，2：533 页）专着为渔业科学提供了广泛使用的种群-招募关系 (BH-SRR)。然而，由于产卵生物量和新兵之间假定关系的变化，BH-SRR 通常被认为是不充分的，并且仅作为曲线拟合练习来接近。BH-SRR 的常用和简化版本掩盖了这样一个事实，即在其经典专着中，推导解释了机械招募过程，包括多阶段招募，具有明确的队列依赖和独立死亡率术语，代表新兵和新兵之间的竞争。外在，与队列无关的因素，例如环境或捕食，是死亡率的两个独立来源。原始的 BH-SRR 允许人们重新创建与观察到的招募模式相对应的招募模式。这样做表明，与密度无关的死亡率的变化增加了忽视潜在库存-招聘关系的可能性。死亡率的中间变异系数 (75-100%) 足以掩盖库存-招聘关系并重新创建与经验数据最相似的招聘时间序列。这强调了生存变化对招募的重要性，并且 Beverton 和 Holt 的工作仍然为模拟种群动态提供了一个基本且有用的工具。这样做表明，与密度无关的死亡率的变化增加了忽视潜在库存-招聘关系的可能性。死亡率的中间变异系数 (75-100%) 足以掩盖库存-招聘关系并重新创建与经验数据最相似的招聘时间序列。这强调了生存变化对招募的重要性，并且 Beverton 和 Holt 的工作仍然为模拟种群动态提供了一个基本且有用的工具。这样做表明，与密度无关的死亡率的变化增加了忽视潜在库存-招聘关系的可能性。死亡率的中间变异系数 (75-100%) 足以掩盖库存-招聘关系并重新创建与经验数据最相似的招聘时间序列。这强调了生存变化对招募的重要性，并且 Beverton 和 Holt 的工作仍然为模拟种群动态提供了一个基本且有用的工具。