Are deep-sea cephalopods really common preys for oceanic seabirds?
Are deep-sea cephalopods really common preys for oceanic seabirds?
复制标题
深海头足类动物真的是海洋海鸟的常见猎物吗？
DOI：
10.1590/s1676-06032011000100018
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发表时间：
2011
期刊：
影响因子：
1.2
通讯作者：
T. V. Júnior
中科院分区：
文献类型：
--
作者：
T. V. Júnior
对已发表的海洋海鸟饮食数据的分析表明，肌肉发达的头足类动物在海洋层的表层分布中占主导地位，但同样重要的是，凝胶状和氨类物种仅限于距离表面 300 m 以下的层。原则上，不能像几位作者所得出的结论那样，认为深海头足类动物是海鸟的常见猎物。本研究提出，随着金枪鱼延绳钓作业的开始，已经出现了一个重要且容易获得的间接来源。以金枪鱼延绳钓捕获的鱼的内脏为食的习惯，以及将内脏内容物丢弃到水中的习惯，可以解释可能的模棱两可的结论，即深海头足类动物是海洋海鸟的天然猎物。
An analysis of published data on oceanic seabirds diets, show the predominance of muscular cephalopods with superficial distribution in the oceanic layers, but also important are the gelatinous and ammoniacal species restrict to layers below 300 m from the surface. In principle, it could be not expected that deep-sea cephalopods are common prey for seabirds like several authors have been concluded. It is proposed in this study that an indirect source, important and easily attainable, have been appeared with the beginning of tuna longline operations. The habit to feed upon viscera of the fishes captured by tuna longliners, that discard the gut contents to the water, may explain the probable equivocal conclusions that deep dwelling cephalopods are natural prey of oceanic seabirds.