• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Validation of otolith δ~(18)O values as effective natural tags for shelf-scale geolocation of migrating fish
【24h】

Validation of otolith δ~(18)O values as effective natural tags for shelf-scale geolocation of migrating fish

机译：耳石δ〜（18）O值作为迁徙鱼类架子规模地理定位的有效天然标签的验证

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

The oxygen isotopic ratio of fish otoliths is increasingly used as a 'natural tag' to assess provenance in migratory species, with the assumption that variations in delta O-18 values closely reflect individual ambient experience of temperature and/or salinity. We employed archival tag data and otoliths collected from a shelf-scale study of the spatial dynamics of North Sea plaice Pleuronectes platessa L., to examine the limits of otolith delta O-18-based geolocation of fish during their annual migrations. Detailed intra-annual otolith delta O-18 measurements for 1997-1999 from individuals of 3 distinct sub-stocks with different spawning locations were compared with delta O-18 values predicted at the monthly, seasonal and annual scales, using predicted sub-stock specific temperatures and salinities over the same years. Spatio-temporal variation in expected delta O-18 values (-0.23 to 2.94%) mainly reflected variation in temperature, and among-zone discrimination potential using otolith delta O-18 varied greatly by temporal scale and by time of year. Measured otolith delta O-18 values (-0.71 to 3.09%) largely mirrored seasonally predicted values, but occasionally fell outside expected delta O-18 ranges. Where mismatches were observed, differences among sub-stocks were consistently greater than predicted, suggesting that in plaice, differential sub-stock growth rates and physiological effects during oxygen fractionation enhance geolocation potential using otolith delta O-18. Comparing intra-annual delta O-18 values over several consecutive years for individuals with contrasted migratory patterns corroborated a high degree of feeding and spawning site fidelity irrespective of the sub-stock. Informed interpretation of otolith delta O-18 values can therefore provide relatively detailed fisheries-relevant data not readily obtained by conventional means.
机译：鱼耳石的氧同位素比率越来越多地被用作评估迁徙物种出处的“天然标签”，并假设O-18值的变化紧密反映了个人对温度和/或盐度的环境体验。我们采用了档案标签数据和耳石，这些数据是从对北海鱼Pleuronectes platesa L.的空间动力学的架子规模研究中收集到的，以检查基于耳石三角洲O-18的鱼类在其每年迁徙中的地理分布限制。使用预测的子种群特异性，将1997-1999年来自3个不同产卵位置的不同子种群个体的详细耳内耳石三角洲O-18的详细测量值与按月，季节和年度尺度预测的德尔塔O-18值进行了比较。相同年份的温度和盐度。预期的δO-18值的时空变化（-0.23至2.94％）主要反映了温度的变化，使用耳石δO-18的区域间识别潜力随时间尺度和每年的时间变化很大。测得的耳石δO-18值（-0.71至3.09％）在很大程度上反映了季节性预测值，但偶尔落在δO-18预期范围之外。在观察到不匹配的地方，子种群之间的差异始终大于预期，这表明在中，不同的子种群生长速率和氧分馏过程中的生理效应提高了使用耳石δO-18的地理定位潜力。连续几年比较具有不同迁徙方式的个体的年度内O-18值，可以证实无论子种群如何，都具有很高的摄食和产卵场保真度。耳石δO-18值的知情解释因此可以提供相对较详细的与渔业有关的数据，而传统方法不易获得这些数据。

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