Department of Earth Sciences, University of Oxford, Oxford, UK
BOREA (UMR 7208 CNRS, MNHN, IRD, Sorbonne Université), Muséum national d'Histoire naturelle, Paris, France.
Biol Lett. 2018 Jun;14(6). doi: 10.1098/rsbl.2018.0270.
Endothermy, production and retention of heat by the body, appeared convergently in mammals, birds and four spiny-rayed teleost fish lineages. Of these, red-muscle endothermy over most or all of the body has only appeared in two groups: tunas and the opah (). Hitherto, tunas have been the only spiny-rayed fishes known to have bones containing embedded osteocyte cells; others have acellular bone. We examined bone histology in for the first time, demonstrating the presence of cellular bone very similar to that of tunas. This contrasts with the acellular condition of its ectothermic close relatives. The distribution of this character suggests that it co-evolved with red-muscle endothermy, hinting at a common physiological mechanism that would link bone histology to endothermy in these distantly related teleost lineages.
体内产热和热量保持的温血现象，在哺乳动物、鸟类和 4 个有刺鳍的硬骨鱼进化支系中趋同出现。在这些动物中，只有两个群体出现了全身或大部分肌肉的红色温血现象：金枪鱼和月鱼（Opah）。迄今为止，金枪鱼是唯一已知的骨骼中含有嵌入成骨细胞的有刺鳍鱼类；其他鱼类的骨骼则没有细胞。我们首次在月鱼中检查了骨骼组织学，证明存在与金枪鱼非常相似的细胞骨。这与它的冷血近亲的无细胞状态形成对比。这个特征的分布表明它与红色肌肉温血现象共同进化，暗示在这些远缘硬骨鱼进化支系中，骨骼组织学与温血现象之间存在共同的生理机制。
