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首页> 外文期刊>Marine biology >Diet of 0-group stages of capelin (Mallotus villosus), herring (Clupea harengus) and cod (Gadus morhua) during spring and summer in the Barents Sea
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Diet of 0-group stages of capelin (Mallotus villosus), herring (Clupea harengus) and cod (Gadus morhua) during spring and summer in the Barents Sea

机译：巴伦支海春季和夏季的毛鳞鱼（Mallotus villosus），鲱鱼（Clupea harengus）和鳕鱼（Gadus morhua）0组阶段的饮食

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摘要

Recruitment of capelin in the Barents Sea fail when juvenile herring and cod are abundant and the potential for feeding competition of wild sympatric capelin and herring larvae and small cod juveniles were investigated. The frequency of gut evacuation after capture of capelin larvae were also studied in mesocosms. Small capelin larvae ( < 35 mm length) fed on small prey including phytoplankton, invertebrate eggs and nauplii, bivalves, other invertebrate larvae and small copepods. Calamus copepodites were only observed in large capelin larvae ( > 26 mm length). Calanus copepodites were the major food sources for contemporary herring larvae (25-35 mm length) and Calanus and eup-hausiids were the major prey for small juvenile herring (37-60 mm length) and cod (18-40 mm length). Capelin larvae reared in mesocosms evacuated the guts shortly after capture. Capelin larvae had a smaller mouth and fed on smaller prey than herring and cod of the same length. This implies that the small capelin larvae, in contrast to sympatric small herring and cod, are not tightly linked to the food chain involving Calanus and euphausiids. Thus, exploitative competition between capelin larvae and planktivorous fish that rely on Calanus and euphausiids in the Barents Sea may be relaxed.
机译：当少年鲱鱼和鳕鱼丰富时，在巴伦支海的海豹素招募失败，并调查了野生同伴毛鳞鱼和鲱鱼幼虫以及小型鳕鱼幼鱼的竞争饲养潜力。捕获毛鳞鱼幼虫后肠排空的频率也进行了研究。小毛鳞鱼幼虫（<35毫米长）以小猎物为食，包括浮游植物，无脊椎动物卵和无节幼体，双壳类，其他无脊椎动物幼虫和小co足类。 am蒲足足类仅在大型毛鳞鱼幼虫（> 26 mm长）中观察到。螯虾足足是当代鲱鱼幼体（25-35毫米长）的主要食物来源，而螯虾和e虾是小鲱鱼（37-60毫米长）和鳕鱼（18-40毫米长）的主要猎物。捕获后不久，在中膜饲养的毛鳞鱼幼虫将肠子抽空。与相同长度的鲱鱼和鳕鱼相比，毛鳞鱼幼虫的嘴较小，食肉也较小。这意味着，与同胞小鲱鱼和鳕鱼相比，小毛鳞鱼幼虫与包括卡柳氏菌和金鱼的食物链没有紧密联系。因此，可以放松毛鳞鱼幼虫和依靠巴伦支海中的卡努斯和长鳍金枪鱼的浮游鱼类之间的剥削竞争。

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  • 来源
    《Marine biology》 |2008年第6期|p.1037-1046|共10页
  • 作者

    Torstein Pedersen; Maria Fossheim;

  • 作者单位

    Department of Aquatic BioSciences, Norwegian College of Fishery Science, University of Tromso, Breivika, 9037 Tromso, Norway;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境生物学;
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