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首页> 外文期刊>ICES Journal of Marine Science >Stable isotopes reveal age-dependent trophic level and spatial segregation during adult marine feeding in populations of salmon
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Stable isotopes reveal age-dependent trophic level and spatial segregation during adult marine feeding in populations of salmon

机译：稳定的同位素揭示鲑鱼种群在成年海洋捕食过程中与年龄有关的营养水平和空间隔离

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摘要

Locating and differentiating the marine feeding areas used by adult salmon (Salmo salar) is essential to stock-based management and conservation, but traditional tagging studies are limited and influenced by the uneven distribution of the fisheries or research vessel surveys. Here, a novel approach is used, based on the observation that the isotopic composition of animal tissues is intrinsically linked to the environmental conditions during tissue growth, which allows for the distinction of pelagic fish feeding in different locations. This isotopic approach is applied using archived collections of salmon scales and shows that (i) salmon act as size-structured pelagic predators, (ii) adult salmon from different natal origins within the UK (and hence components of the southern European stock complex) feed in different oceanic regions before their return, (iii) one-sea-winter (1SW) and multi-sea-winter salmon returning to some rivers in the UK are separated in their marine feeding areas, whereas those from others are not, and (iv) salmon from the rivers sampled are not feeding in regions of the Northwest Atlantic used by 1SW salmon returning to rivers in Newfoundland. Therefore, the stable isotope approach allows for retrospective investigations of marine diet, location, and migration at stock- and cohort-specific levels.
机译：定位和区分成年鲑（Salmo salar）使用的海洋取食区对于基于种群的管理和保护至关重要，但是传统的标签研究受到限制，并且受到渔业或研究船调查分布不均的影响。在此，基于观察到的动物组织的同位素组成与组织生长过程中的环境条件有内在联系，使用了一种新颖的方法，从而可以区分远洋鱼类在不同位置的摄食。这种同位素方法通过使用鲑鱼鳞片的存档集合加以应用，结果表明（i）鲑鱼是大小结构的中上层捕食者，（ii）来自英国境内不同出生年龄的成年鲑鱼（以及由此而来的南欧畜群） （iii）返回英国某些河流的一海冬（1SW）和多海冬季鲑鱼在其海洋饲喂区是分开的，而来自其他河流的则没有，和（ iv）1SW鲑鱼返回纽芬兰的河流时，所采样河流中的鲑鱼未进入西北大西洋地区。因此，稳定的同位素方法可以在特定种群和特定种群的水平上对海洋饮食，位置和迁移进行回顾性研究。

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  • 来源
    《ICES Journal of Marine Science》 |2012年第9期|p.1637-1645|共9页
  • 作者

    Kirsteen M. MacKenzie; Clive N. Trueman; Martin R. Palmer; Andy Moore; Anton T. Ibbotson; William R. C. Beaumont; Ian C. Davidson;

  • 作者单位

    School of Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK;

    School of Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK;

    School of Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK;

    Cefas, Pakefield Road, Lowestoft, Suffolk NR33 0HT, UK;

    Come and Wildlife Conservation Trust, East Stoke, Wareham BH20 6BB, UK;

    Come and Wildlife Conservation Trust, East Stoke, Wareham BH20 6BB, UK;

    Environment Agency, Chester Road, Buckley, Flintshire CH7 3AJ, UK;

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

    microchemistry; migration; North Atlantic; salmo salar; scales;

    机译：微化学移民;北大西洋;salmo salar;秤;

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