EVOLUTION OF ENDOTHERMY IN FISH - MAPPING PHYSIOLOGICAL TRAITS ON A MOLECULAR PHYLOGENY
EVOLUTION OF ENDOTHERMY IN FISH - MAPPING PHYSIOLOGICAL TRAITS ON A MOLECULAR PHYLOGENY
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DOI：
10.1126/science.8469974
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发表时间：
1993-04-09
期刊：
影响因子：
56.9
通讯作者：
KIDD, J
中科院分区：
文献类型：
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作者：
BLOCK, BA;FINNERTY, JR;KIDD, J
鲭鱼，金枪鱼和长嘴鱼（鲭亚目和真骨鱼亚目）提供了一个理想的分类背景下，研究恒温动物的进化。在这些鱼类中存在着多种起源和不同的策略。在这里，通过对线粒体细胞色素B基因的一部分进行直接测序，确定了鲭亚目的分子遗传学。在这个提出的谱系中，吸热物质的分布表明，使大脑和视网膜变暖的能力在三个谱系中独立出现，每次都与进入冷水中的运动有关。这表明，在鱼类颅吸热的演变是为了允许热生态位扩张，而不是选择增加有氧能力。
Mackerels, tunas, and billfishes (suborder Scombroidei and Teleostei) provide an ideal taxonomic context in which to examine the evolution of endothermy. Multiple origins and diverse strategies for endothermy exist among these fish. Here a molecular phylogeny of the Scombroidei has been determined by direct sequencing of a portion of the mitochondrial cytochrome b gene. The distribution of endothermic species within this proposed genealogy indicates that the ability to warm the brain and retina arose independently in three lineages, each time in association with a movement into colder water. This suggests that the evolution of cranial endothermy in fish was selected in order to permit thermal niche expansion and not selected for increased aerobic capacity.