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首页> 外文期刊>ICES Journal of Marine Science >General state-space population dynamics model for Bayesian stock assessment
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General state-space population dynamics model for Bayesian stock assessment

机译:贝叶斯股票评估的一般状态空间人口动力学模型

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This study presents a state-space modelling framework for the purposes of stock assessment. The stochastic population dynamics build on the notion of correlated survival and capture events among individuals. The correlation is thought to arise as a combination of schooling behaviour, a spatially patchy environment, and common but unobserved environmental factors affecting all the individuals. The population dynamics model isolates the key biological processes, so that they are not condensed into one parameter but are kept separate. This approach is chosen to aid the inclusion of biological knowledge from sources other than the assessment data at hand. The model can be tailored to each case by choosing appropriate models for the biological processes. Uncertainty about the model parameters and about the appropriate model structures is then described using prior distributions. Different combinations of, for example, age, size, phenotype, life stage, species, and spatial location can be used to structure the population. To update the prior knowledge, the model can be fitted to data by defining appropriate observation models. Much like the biological parameters, the observation models must also be tailored to fit each individual case.
机译:这项研究提出了用于库存评估的状态空间建模框架。随机种群动态建立在个体之间相关的生存和捕获事件的概念上。这种相关性被认为是学校教育行为,空间上零散的环境以及影响所有个体的常见但未观察到的环境因素的结合。种群动力学模型将关键的生物过程隔离开来,因此它们不会被浓缩为一个参数,而是保持分离。选择这种方法是为了帮助从现有评估数据以外的其他来源中获取生物学知识。通过为生物过程选择适当的模型,可以为每种情况定制模型。然后使用先验分布描述模型参数和适当模型结构的不确定性。可以使用例如年龄,大小,表型,生命阶段,种类和空间位置的不同组合来构造种群。为了更新现有知识,可以通过定义适当的观察模型将模型拟合到数据。就像生物学参数一样,观察模型也必须经过调整以适合每个个案。

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