Functional morphogenesis from embryos to adults: Late development shapes trophic niche in coral reef damselfishes
Functional morphogenesis from embryos to adults: Late development shapes trophic niche in coral reef damselfishes
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DOI：
10.1111/ede.12321
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发表时间：
2020-05-01
影响因子：
2.9
通讯作者：
Lazono, Orissa
中科院分区：
文献类型：
--
作者：
James Cooper, W.;VanHall, Rachel;Lazono, Orissa
雀鲷是主要的珊瑚礁鱼类谱系之一。它们的生态多样化涉及在使用快速咬合的中上层进食和使用强力咬合的底栖进食之间的反复转变。采用结合基因表达测定、形状分析和高速视频分析的高度综合方法来检查胚胎、幼鱼、幼鱼和成年雀鲷营养形态的发育。区分中上层和底栖物种的解剖特征直到幼虫发育后才出现。胚胎下颌形态发生、幼虫头骨形状和幼虫咬合机制的模式都无法将雀鲷与不同的成体营养性群体区分开来。对头骨形状和摄食性能的分析确定了单个物种（橙色小丑鱼；Amphiprion percula）营养发育中的两个重要转变：（a）变态期间摄食机制的显着转变； (b) 在青少年发育过程中更持久的颅骨重塑。这项研究的结果表明，幼鱼形态发生的变化在雀鲷的进化中发挥了重要作用。对于其他鱼类谱系来说，情况可能也是如此，特别是当它们由海洋物种组成时，其中大多数具有与其成体相比具有不同摄食功能要求的浮游幼虫。
The damselfishes are one of the dominant coral reef fish lineages. Their ecological diversification has involved repeated transitions between pelagic feeding using fast bites and benthic feeding using forceful bites. A highly-integrative approach that combined gene expression assays, shape analyses, and high-speed video analyses was used to examine the development of trophic morphology in embryonic, larval, juvenile, and adult damselfishes. The anatomical characters that distinguish pelagic-feeding and benthic-feeding species do not appear until after larval development. Neither patterns of embryonic jaw morphogenesis, larval skull shapes nor larval bite mechanics significantly distinguished damselfishes from different adult trophic guilds. Analyses of skull shape and feeding performance identified two important transitions in the trophic development of a single species (the orange clownfish; Amphiprion percula): (a) a pronounced transformation in feeding mechanics during metamorphosis; and (b) more protracted cranial remodeling over the course of juvenile development. The results of this study indicate that changes in postlarval morphogenesis have played an important role in damselfish evolution. This is likely to be true for other fish lineages, particularly if they consist of marine species, the majority of which have planktonic larvae with different functional requirements for feeding in comparison to their adult forms.