...
  • 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 >A two-stage biomass model for Irish Sea herring allowing for additional variance in the recruitment index caused by mixing of stocks
【24h】

A two-stage biomass model for Irish Sea herring allowing for additional variance in the recruitment index caused by mixing of stocks

机译：爱尔兰海鲱鱼的两阶段生物量模型，允许由于混合种群而导致招聘指数的其他变化

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

An assessment of Irish Sea (ICES Division Vlla, North) herring using a two-stage biomass model was undertaken given lack of internal consistency in the survey age-disaggregated index. The model constrains recruitment variability and reduces the number of catchabil-ity parameters to address concerns of overparameterization. An extra parameter was incorporated to estimate the component of the variance resulting from the mixing of Celtic Sea and Irish Sea juvenile herring in the survey area. This additional variance, although imprecise, represented a large part of the total variance associated with the recruit survey data. More information on the variability of Irish Sea herring recruitment is required to estimate additional variance in the context of the two-stage biomass model presented. Limitations in the age-composition data and potential interannual variation in the selection pattern of the fishery favour an assessment method, such as the two-stage biomass method, which is based on a simplified age structure and does not require separability assumptions.
机译：由于在按年龄分类的指数中缺乏内部一致性，因此采用了两阶段生物量模型对爱尔兰海（北冰洋州维拉市的ICES司）鲱鱼进行了评估。该模型限制了募集变异性并减少了可捕获性参数的数量，以解决过度参数化的问题。合并了一个额外的参数，以估计由调查区域中的凯尔特海和爱尔兰海幼鲱混合而成的方差分量。这种额外的方差虽然不精确，但却代表了与新兵调查数据相关的总方差的很大一部分。需要更多有关爱尔兰海鲱招募的变异性的信息，以在所介绍的两阶段生物量模型的背景下估算额外的变异性。年龄构成数据的局限性和渔业选择模式的潜在年际变化有利于评估方法，如两阶段生物量法，该方法基于简化的年龄结构，不需要可分离性假设。

著录项

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