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首页> 外文期刊>Marine ecology progress series >Stable isotopes (δ~(15)N, δ~(13)C, δ~(34)S) in skin reveal diverse food sources used by southern right whales Eubalaena australis
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Stable isotopes (δ~(15)N, δ~(13)C, δ~(34)S) in skin reveal diverse food sources used by southern right whales Eubalaena australis

机译：皮肤中的稳定同位素（δ〜（15）N，δ〜（13）C，δ〜（34）S）揭示了南部右鲸Eubalaena australis使用的多种食物来源

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摘要

Skin samples collected from living southern right whales (SRWs) off Peninsula Valdes, Argentina, show a wide range of stable isotope values (delta N-15, delta C-18, delta S-34). These were compared to the isotopic signatures of euphausiids and copepods from different areas across the southwestern South Atlantic and the Atlantic sector of the Southern Ocean. Our results suggest that that this population of SRWs uses at least 3 distinct food sources. Each food source may represent a single feeding ground or a combination of feeding grounds with different prey species distributions. Individual whales pursue foraging strategies that vary substantially in the amounts of time they spend in different feeding grounds along their migratory paths. The 3 grounds that appear to contribute most to the diets of Peninsula Valdes SRWs correspond to areas previously documented in the log books of whaling ships: the Patagonian Shelf, South Georgia and the waters of the Polar Front. It is possible that additional feeding areas are also currently being used in the South Atlantic. Age and sex classes differ isotopically, but these differences could be caused by biomechanical or physiological characteristics rather than by age- and sex-specific specialization in different feeding areas.
机译：从阿根廷半岛瓦尔德斯附近的南部右鲸生活的皮肤样本显示出各种稳定的同位素值（δN-15，δC-18，δS-34）。将这些与来自西南大西洋西南部和南大西洋大西洋部分不同地区的古猿和co足类动物的同位素特征进行了比较。我们的结果表明，这一系列SRW至少使用3种不同的食物来源。每个食物来源都可以代表一个捕食场，也可以代表具有不同猎物种类分布的捕食场的组合。各个鲸鱼都采用觅食策略，这些策略沿迁徙路径在不同的觅食场中度过的时间差异很大。似乎对巴尔德半岛SRW的饮食贡献最大的3个理由与先前在捕鲸船原木中记录的区域相对应：巴塔哥尼亚大陆架，南乔治亚州和极地前线的水域。当前在南大西洋可能还会使用其他觅食区。年龄和性别类别在同位素上有所不同，但这些差异可能是由于生物力学或生理特征引起的，而不是由不同喂养地区的按年龄和性别划分的专业知识引起的。

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