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首页> 外文期刊>Polar biology >Distribution and diet of 0-group cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Barents Sea in relation to food availability and temperature
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Distribution and diet of 0-group cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Barents Sea in relation to food availability and temperature

机译：与食物供应量和温度相关的巴伦支海0组鳕鱼（Gadus morhua）和黑线鳕（Melanogrammus aeglefinus）的分布和饮食

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摘要

Distribution of 0-group cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in August-September 2005 and 2006 was mainly restricted to the Atlantic waters of the western and central areas of the Barents Sea. The main distribution of 0-group fish overlapped largely with areas of high biomass (>7 gm~(-2) dry weight) of zooplankton. The copepod Calanus finmarchi-cus and krill Thysanoessa inermis, which are dominant zooplankton species in both Atlantic and boreal waters of the Barents Sea, were the main prey of 0-group cod and haddock. The main distribution, feeding areas and prey of 0-group cod and haddock overlapped, implying that competition for food may occur between the two species. However, though their diet coincided to a certain degree, haddock seems to prefer smaller and less mobile prey, such as Limacina and appendicularians. As 0-group fish increased in size, there seems to be a shift in diet, from small copepods and towards larger prey such as krill and fish. Overall, a largely pelagic feeding behaviour of 0-group cod and haddock was evident from this study.
机译：2005年8月至9月和2006年的0类鳕鱼（Gadus morhua）和黑线鳕（Melanogrammus aeglefinus）的分布主要限于巴伦支海西部和中部地区的大西洋水域。零类鱼类的主要分布与浮游生物的高生物量（> 7 gm〜（-2）干重）区域大部分重叠。 Atlantic足类的Calanus finmarchi-cus和磷虾Thysanoessa inermis是大西洋和巴伦支海北岸水域的主要浮游动物，是0类鳕鱼和黑线鳕的主要猎物。 0群鳕鱼和黑线鳕的主要分布，摄食区域和猎物重叠，这意味着这两个物种之间可能发生食物竞争。然而，尽管他们的饮食在一定程度上相吻合，黑线鳕似乎更喜欢体积较小，流动性较小的猎物，例如Limacina和阑尾虫。随着0类鱼类尺寸的增加，饮食结构似乎发生了变化，从小型co足类动物转向大型猎物，例如磷虾和鱼类。总体而言，从这项研究中可以明显看出，0组鳕鱼和黑线鳕在很大程度上是浮游的。

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