...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ICES Journal of Marine Science >Determining effective sample size in integrated age-structured assessment models
【24h】

Determining effective sample size in integrated age-structured assessment models

机译：在年龄结构综合评估模型中确定有效样本量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Effective sample size (ESS) is a quantity that allows for overdispersion of variance and is used commonly in integrated age-structured fishery assessment models to (it age-and-length-composition datasets. Owing to the sources of measurement, observation, process, and model-specification errors, the ESS is smaller than the actual sample size. In this study, methods to set a priori or to estimate the ESS when confronted with datasets that include these sources of error were investigated. In general, a number of methods previously proposed to incorporate the ESS resulted in accurate estimation of population quantities and parameters when different sources of error were included in the data on age and length compositions. Three objective methods to incorporate the ESS resulted in unbiased population quantities: (i) using sampling theory to derive the ESS from actual age and length compositions, (ii) iteratively estimating the ESS with the age-structured assessment model, and (iii) estimating the ESS as a parameter with the Dirichlet distribution.
机译：有效样本量（ESS）是可以允许方差过度分散的量，通常用于年龄结构综合渔业评估模型（以年龄和长度构成数据集）中。由于测量，观察，处理，和模型规范错误，ESS小于实际样本量。在这项研究中，研究了设置先验或估计ESS的方法，当面对包含这些错误源的数据集时，通常使用许多方法当年龄和长度构成数据中包含不同的误差源时，先前提出的纳入ESS的方法可以准确估计种群数量和参数。纳入ESS的三种客观方法可以使种群数量无偏：（i）使用抽样理论从实际年龄和身长组成中得出ESS，（ii）使用年龄结构评估模型迭代估算ESS，以及（iii）估算使用Dirichlet分布将ESS作为参数。

著录项

  • 来源
    《ICES Journal of Marine Science》 |2012年第2期|p.281-292|共12页
  • 作者

    Peter-John F. Hulson; Dana H. Hanselman; Terrance J. Quinn II;

  • 作者单位

    Juneau Center, School oj Fisheries and Ocean Sciences, University of Alaska Fairbanks, 17101 Point Lena Loop Road, Juneau, AK 99801, USA ,NOAA National Marine Fisheries Service, Alaska Fisheries Science Center, Auke Bay Laboratories, 11109 Point Lena Loop Road, juneau, AK 99801, USA;

    NOAA National Marine Fisheries Service, Alaska Fisheries Science Center, Auke Bay Laboratories, 11109 Point Lena Loop Road, juneau, AK 99801, USA;

    Juneau Center, School oj Fisheries and Ocean Sciences, University of Alaska Fairbanks, 17101 Point Lena Loop Road, Juneau, AK 99801, USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    age-structured assessment; dirichlet distribution; effective sample size;

    机译：年龄结构评估;狄利克雷分布有效样本量;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号