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首页> 外文期刊>ICES Journal of Marine Science >Snow crab (Chionoecetes opilio), a new food item for North-east Arctic cod (Gadus morhua) in the Barents Sea
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Snow crab (Chionoecetes opilio), a new food item for North-east Arctic cod (Gadus morhua) in the Barents Sea

机译：雪蟹（Chionoecetes Opilio），在巴伦斯海的东北北极鳕鱼（Gadus Morhua）的新食品

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摘要

The snow crab (Chionoecetes opilio) is a newly established species in the Barents Sea, increasing in both distribution and abundance in recent years. We explore the potential importance of North-east Arctic cod (Gadus morhua) predation in structuring the snow crab population expansion in the Barents Sea, through an analysis of cod stomach content data from 2003 to 2018. Spatio-temporal patterns of snow crab within cod diet are assessed across years, between seasons, as well as ontogenetic trends, including predator-prey size relationships. Snow crab represents a new prey item for cod and in recent years the most dominant demersal crustacean species in cod diet. The proportion of snow crab within cod diet increases over time. Primarily 60-110cm cod prey upon snow crab, mainly during the summer/autumn season. Our results support the idea that the snow crab is still expanding, shifting distribution north and westwards. Cod has the potential to regulate the snow crab population but is unlikely to be in direct competition with the fishery in the Barents Sea. This work suggests that cod can be used as biological sampling tools together with other monitoring programmes to elucidate how new species may affect predator-prey and food-web dynamics within an ecosystem context.
机译：雪蟹（Chionoecetes Opilio）是近年来分布和丰度的新建立的物种。我们探讨了东北北极鳕鱼（GADUS MORHUA）捕食在鳕鱼中的雪蟹口扩张中的潜在重要性，通过2003年至2018年的COD胃内容数据分析。COD中的雪蟹的时空模式饮食在季节之间进行评估，季节和围母趋势，包括捕食者 - 猎物尺寸关系。雪蟹代表了COD的新猎物项目，近年来COD饮食中最占主导地位的脱果甲壳类动物。 COD饮食中的雪蟹的比例随着时间的推移而增加。主要是60-110厘米的雪蟹，主要是在夏季/秋季。我们的结果支持了雪蟹仍在扩大，北方和向西的速度扩大的想法。 COD有可能调节雪蟹口，但不太可能与渔业在渔业中直接竞争。这项工作表明，COD可以用作生物采样工具以及其他监控程序，以阐明新物种如何影响生态系统背景中的捕食者 - 猎物和食品网络动态。

著录项

  • 来源
    《ICES Journal of Marine Science》 |2021年第2期|491-501|共11页
  • 作者

    Holt Rebecca E.; Hvingel Carsten; Agnalt Ann-Lisbeth; Dolgov Andrey V; Hjelset Ann Merete; Bogstad Bjarte;

  • 作者单位

    Univ Oslo Ctr Ecol & Evolutionary Synth Dept Biosci POB 1066 N-0316 Oslo Norway;

    Inst Marine Res POB 6606 N-9296 Tromso Norway;

    Inst Marine Res POB 1870 N-5817 Bergen Norway;

    Russian Fed Res Inst Fisheries & Oceanog PINRO Lab Hydrobiol Polar Branch Fed State Budget Sci Inst 6 Acad Knipovicha St Murmansk 183038 Russia|Murmansk State Tech Univ Dept Biol & Aquat Biol Resources Fed State Educ Inst Higher Educ 13 Sportivnaya St Murmansk 183010 Russia|Tomsk State Univ Lab Engn Surveys & Environm Monitoring 36 Lenin Ave Tomsk 634050 Russia;

    Inst Marine Res POB 6606 N-9296 Tromso Norway;

    Inst Marine Res POB 1870 N-5817 Bergen Norway;

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

    diet; ecosystem impact; fisheries; non-native species; predator-prey dynamics; snow crab;

    机译：饮食;生态系统的影响;渔业;非原生物种;捕食者 - 猎物动态;雪蟹;

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