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首页> 外文期刊>ICES Journal of Marine Science >Diets of herring, mackerel, and blue whiting in the Norwegian Sea in relation to Calanus finmarchicus distribution and temperature conditions
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Diets of herring, mackerel, and blue whiting in the Norwegian Sea in relation to Calanus finmarchicus distribution and temperature conditions

机译：挪威海中鲱鱼，鲭鱼和蓝鳕的饮食与鳍alan的分布和温度条件的关系

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摘要

Diets of Norwegian spring-spawning herring, mackerel, and blue whiting in the Norwegian Sea are investigated in relation to the distribution of plankton and hydrographic conditions. Fish stomachs and zooplankton samples were collected during summer (June and July) cruises in 2001 and 2002. Calanus finmarchicus was the principal prey of mackerel, accounting for 53—98% of total stomach content by weight. The diet composition of herring varied depending on feeding area and availability of food under various environmental conditions. C. finmarchicus was important prey for herring only in July 2001 (about 77% by weight) in the central part of the sea and in June 2002 (about 82% by weight) near the Lofo-tens. In July 2002 appendicularians (Oikopleura spp.), amphipods (mainly Parathemisto abissorum), and euphausiids were important in the diet of herring, and at some stations cannibalism was observed. The main prey of blue whiting were amphipods (10—34% by weight), appendicularians (11—34%), and euphausiids (8—47%), as they usually feed deep in the water column, though C. finmarchicus was important, particularly in June 2002, when blue whiting were caught in the upper layers of the sea. Higher water temperatures indirectly affect pelagic fish through accelerated development of their prey and favourable conditions for migration farther north.
机译：研究了挪威海中挪威春季产卵鲱鱼，鲭鱼和蓝鳕的饮食与浮游生物的分布和水文状况的关系。在2001年和2002年夏季（6月和7月）的航行中，收集了鱼胃和浮游动物样本。finmarchicus alan是鲭鱼的主要猎物，占胃总重量的53-98％。鲱鱼的饮食组成取决于各种环境条件下的饲喂面积和食物供应。仅在2001年7月（约占重量的77％）在海中部和2002年6月（约占重量的82％）在Lofo-tens附近，finmarchicus鲱鱼才是重要的鲱鱼。 2002年7月，鲱鱼的饮食中，阑尾虫（Oikopleura spp。），两栖类动物（主要是副寄生虫）和e虫类重要，并且在某些地方发现食人性。蓝鳕的主要捕食对象是两栖类动物（按重量计占10％至34％），附肢类动物（占11％至34％）和肠虫（按比例为8％至47％），尽管它们通常在深水鱼类中觅食。尤其是在2002年6月，在海的上层捕获了蓝鳕。较高的水温通过加速其捕食的发展以及向更北部迁移的有利条件间接影响远洋鱼类。

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