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首页> 外文期刊>ICES Journal of Marine Science >Some explorations of the life history ratios to describe length composition, spawning-per-recruit, and the spawning potential ratio
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Some explorations of the life history ratios to describe length composition, spawning-per-recruit, and the spawning potential ratio

机译：探索寿命历史比率以描述长度组成，每招募产卵数和产卵潜力比

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摘要

Evaluating the status of data-poor fish stocks is often limited by incomplete knowledge of the basic life history parameters: the natural mortality rate (M), the von Bertalanffy growth parameters (L-infinity and k), and the length at maturity (L-m). A common approach to estimate these individual parameters has been to use the Beverton - Holt life history invariants, the ratios M/k and L-m/L-infinity, especially for estimating M. In this study, we assumed no knowledge of the individual parameters, and explored how the information on life history strategy contained in these ratios can be applied to assessing data-poor stocks. We developed analytical models to develop a relationship between M/k and the von Bertalanffy growth curve, and demonstrate the link between the life history ratios and yield-and spawning-per-recruit. We further developed the previously recognized relationship between M/k and yield- and spawning-per-recruit by using information on L-m/L-infinity, knife-edge selectivity (L-c/L-infinity), and the ratio of fishing to natural mortality (F/M), to demonstrate the link between an exploited stock's expected length composition, and its spawning potential ratio (SPR), an internationally recognized measurement of stock status. Variation in length-at-age and logistic selectivity patterns were incorporated in the model to demonstrate how SPR can be calculated from the observed size composition of the catch; an advance which has potential as a cost-effective method for assessing data-poor stocks. A companion paper investigates the effects of deviations in the main assumptions of the model on the application of the analytical models developed in this study as a cost-effective method for stock assessment [Hordyk, A. R., Ono, K., Valencia, S., Loneragan, N. R., and Prince, J. D. 2015. A novel length based empirical estimation method of spawning potential ratio (SPR), and tests of its performance, for small-scale, data-poor fisheries. ICES Journal of Marine Science, 72: 217-231].
机译：缺乏数据的鱼类种群状况的评估通常受到对基本生命史参数的不完全了解的限制：自然死亡率（M），冯·贝塔兰菲的生长参数（L-无穷大和k）以及成熟长度（Lm） ）。估算这些单个参数的常用方法是使用Beverton-Holt生活史不变式，即M / k和Lm / L-无穷比，特别是用于估算M。在这项研究中，我们假设不了解单个参数，并探讨了这些比率中包含的生命史策略信息如何应用于评估数据贫乏的存量。我们开发了分析模型以建立M / k与von Bertalanffy生长曲线之间的关系，并证明了寿命历史比率与每招募的产量和产卵量之间的联系。通过使用有关Lm / L无穷大，刀口选择性（Lc / L无穷大）以及捕捞与自然死亡率之比的信息，我们进一步发展了先前公认的M / k与单产和产卵量之间的关系（F / M），以证明被开发种群的预期长度组成与其产卵可能性比（SPR）之间的联系，后者是国际公认的种群状况度量。模型中结合了成年年龄和后勤选择性模式的变化，以证明如何从​​观察到的渔获物大小组成中计算SPR。这是一种潜在的成本低廉的方法来评估数据匮乏的存货。伴随论文调查了模型主要假设中的偏差对本研究中开发的分析模型的应用的影响，该分析模型是一种经济有效的库存评估方法[Hordyk，AR，Ono，K.，Valencia，S.， NR的Loneragan和JD的Prince，2015年。一种针对产卵量少的小型渔业的基于长度的新的产卵潜力比（SPR）经验估计方法及其性能测试。 ICES海洋科学杂志，72：217-231]。

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