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首页> 美国卫生研究院文献>Philosophical Transactions of the Royal Society B: Biological Sciences >Coping with copepods: do right whales (Eubalaena glacialis) forage visually in dark waters?
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Coping with copepods: do right whales (Eubalaena glacialis) forage visually in dark waters?

机译：应对co足类动物：露脊鲸（Eubalaena glacialis）是否在黑暗的水域中目视觅食？

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摘要

North Atlantic right whales (Eubalaena glacialis) feed during the spring and early summer in marine waters off the northeast coast of North America. Their food primarily consists of planktonic copepods, Calanus finmarchicus, which they consume in large numbers by ram filter feeding. The coastal waters where these whales forage are turbid, but they successfully locate copepod swarms during the day at depths exceeding 100 m, where light is very dim and copepod patches may be difficult to see. Using models of E. glacialis visual sensitivity together with measurements of light in waters near Cape Cod where they feed and of light attenuation by living copepods in seawater, we evaluated the potential for visual foraging by these whales. Our results suggest that vision may be useful for finding copepod patches, particularly if E. glacialis searches overhead for silhouetted masses or layers of copepods. This should permit the whales to locate C. finmarchicus visually throughout most daylight hours at depths throughout their foraging range. Looking laterally, the whales might also be able to see copepod patches at short range near the surface.This article is part of the themed issue ‘Vision in dim light’.
机译：春季和夏季初，北大西洋右鲸（Eubalaena glacialis）在北美东北海岸附近的海水中觅食。他们的食物主要由浮游co足类动物（Calanus finmarchicus）组成，它们通过夯滤器进食而大量食用。这些鲸鱼觅食的沿海水是混浊的，但是它们白天成功地将co足类种群定位在超过100 m的深度，那里光线非常暗淡，and足类斑块可能很难看到。使用冰河大肠杆菌的视觉敏感度模型，以及在它们饲养的科德角附近水域中的光以及海水中活的co足类动物的光衰减的测量结果，我们评估了这些鲸鱼进行视觉觅食的潜力。我们的结果表明，视觉可能对寻找finding足类动物斑块有用，特别是如果E. glacialis在头顶上搜寻silhouette足类动物的足量肿块或层。这应该允许鲸鱼在大多数白天在视觉上在整个觅食范围内的深处找到C. finmarchicus。从侧面看，鲸鱼也许还可以在水面附近的短距离处看到co足类动物斑块。本文是主题“昏暗的视觉”中的一部分。

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