The evolution of foraging capacity and gigantism in cetaceans
The evolution of foraging capacity and gigantism in cetaceans
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DOI：
10.1242/jeb.166033
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发表时间：
2018-06-01
影响因子：
2.8
通讯作者：
Madsen, P. T.
中科院分区：
文献类型：
--
作者：
Goldbogen, J. A.;Madsen, P. T.
现存的鲸类多样性和丰富的化石记录为研究鲸类的形态、功能和生态之间的关系提供了非凡的进化背景。从陆地到海洋生态系统的过渡与一套复杂的形态和生理适应有关，这些适应是完全水生哺乳动物生活史所必需的。两个具体的功能创新，特点的两大分支的鲸类，回声定位在齿鲸（Odontoceti）和过滤器喂养的须鲸（Mysticeti），提供了一个强大的比较框架的综合研究。这两个分支在多个物种中表现出大体型，但我们认为，大体型可能是由于不同的原因和不同的生态系统条件而进化而来的。虽然这些觅食的适应性已经研究了实验和标记的研究相结合，精确的功能驱动程序和这些谱系内部和之间的形态变化的后果仍然不太清楚。未来的研究重点放在生理学，生态学和古生物学的界面将有助于阐明鲸目动物如何成为全球水生生态系统中最大的捕食者。
The extant diversity and rich fossil record of cetaceans provides an extraordinary evolutionary context for investigating the relationship between form, function and ecology. The transition from terrestrial to marine ecosystems is associated with a complex suite of morphological and physiological adaptations that were required for a fully aquatic mammalian life history. Two specific functional innovations that characterize the two great clades of cetaceans, echolocation in toothed whales (Odontoceti) and filter feeding in baleen whales (Mysticeti), provide a powerful comparative framework for integrative studies. Both clades exhibit gigantism in multiple species, but we posit that large body size may have evolved for different reasons and in response to different ecosystem conditions. Although these foraging adaptations have been studied using a combination of experimental and tagging studies, the precise functional drivers and consequences of morphological change within and among these lineages remain less understood. Future studies that focus at the interface of physiology, ecology and paleontology will help elucidate how cetaceans became the largest predators in aquatic ecosystems worldwide.