Reproductive ecology and scientific inference of steepness: a fundamental metric of population dynamics and strategic fisheries management
Reproductive ecology and scientific inference of steepness: a fundamental metric of population dynamics and strategic fisheries management
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生殖生态学和陡度的科学推论：种群动态和战略渔业管理的基本指标
DOI：
10.1111/j.1467-2979.2009.00345.x
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发表时间：
2010
影响因子：
6.7
通讯作者：
G. Dinardo
中科院分区：
文献类型：
--
作者：
M. Mangel;J. Brodziak;G. Dinardo
生殖成熟个体（产卵种群）的生物量与由此产生的后代加入种群（补充）之间的关系，即种群-补充关系，是所有种群生物学中一个基本且具有挑战性的问题。这种关系的陡峭度通常定义为当产卵种群生物量为其未捕捞水平的20%时，从未捕捞种群中获得的补充比例。自大约20年前引入陡度以来，陡度已广泛用于渔业管理，通常将其视为一个统计量。本文采用非结构化模型和年龄结构化模型对陡度的生殖生态进行了研究。我们表明，如果一个人有足够的信息来构建一个与密度无关的人口模型（非结构化情况下的最大人均生产率和自然死亡率，或结构化模型的最大人均生产率、自然死亡率和规模和年龄成熟度表），那么一个人可以构建一个陡峭度的点估计。因此，陡度不能任意选择。如果假设被招募个体的存活率在种群内波动，那么通过考虑早期生活史，就有可能从相同的人口统计信息中构建一个先验的陡峭度分布。我们发展了补偿性（Beverton - Holt）和过度补偿性（Ricker）股票-招聘关系的想法。我们以蓝鳍金枪鱼（Thunnus thynnus/ orientalis, Scombridae）为例说明我们的观点。我们表明，当招聘被认为是环境驱动时，假设陡峭度是统一的，这在生物学上是不一致的，与预防方法不一致，并导致错误的科学推断（这也适用于为陡峭度分配任何其他单一值）。
The relationship between the biomass of reproductively mature individuals (spawning stock) and the resulting offspring added to the population (recruitment), the stock‐recruitment relationship, is a fundamental and challenging problem in all of population biology. The steepness of this relationship is commonly defined as the fraction of recruitment from an unfished population obtained when the spawning stock biomass is 20% of its unfished level. Since its introduction about 20 years ago, steepness has become widely used in fishery management, where it is usually treated as a statistical quantity. Here, we investigate the reproductive ecology of steepness, using both unstructured and age-structured models. We show that if one has sufficient information to construct a density-independent population model (maximum per capita productivity and natural mortality for the unstructured case or maximum per capita productivity, natural mortality and schedules of size and maturity at age for the structured model) then one can construct a point estimate for steepness. Thus, steepness cannot be chosen arbitrarily. If one assumes that the survival of recruited individuals fluctuates within populations, it is possible, by considering the early life history, to construct a prior distribution for steepness from this same demographic information. We develop the ideas for both compensatory (Beverton‐Holt) and over-compensatory (Ricker) stock‐recruitment relationships. We illustrate our ideas with an example concerning bluefin tuna (Thunnus thynnus/ orientalis, Scombridae). We show that assuming that steepness is unity when recruitment is considered to be environmentally driven is not biologically consistent, is inconsistent with a precautionary approach, and leads to the wrong scientific inference (which also applies for assigning steepness any other single value).
日本濑户内海中部鲭鱼 (Scomberomorus niphonius) 幼体的生长和死亡率
DOI：
--
发表时间：
2005
期刊：
Journal of the Marine Biological Association of the United Kingdom 85
影响因子：
--
作者：
Okada T;Akada M;Fujita T;Iwata T;Goto Y;Kido K;Okada T;Matsuzaki Y;Kobayashi K;Matsuno S;Sunamura M;Kawakami Y.;Jun Shoji
通讯作者：
Jun Shoji