THE INFLUENCE OF AN INNOVATIVE LOCOMOTOR STRATEGY ON THE PHENOTYPIC DIVERSIFICATION OF TRIGGERFISH (FAMILY: BALISTIDAE)
THE INFLUENCE OF AN INNOVATIVE LOCOMOTOR STRATEGY ON THE PHENOTYPIC DIVERSIFICATION OF TRIGGERFISH (FAMILY: BALISTIDAE)
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DOI：
10.1111/j.1558-5646.2011.01275.x
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发表时间：
2011-07-01
期刊：
影响因子：
3.3
通讯作者：
Alfaro, Michael E.
中科院分区：
文献类型：
--
作者：
Dornburg, Alex;Sidlauskas, Brian;Alfaro, Michael E.
虽然新的运动策略对海洋鱼类多样性的影响在很大程度上仍未被探索，但运动形态方面的创新已被援引为脊椎动物多样化的重要驱动因素。以枪鱼为例，我们确定了枪鱼用于游泳的背鳍和肛鳍的独特同步性的进化是否催化了该群体的生态多样性。通过采用比较系统发育学方法来量化中鳍和体型的整合，并评估运动性状的功能和形态进化的节奏，我们发现：(1)运动系统的功能和形态成分表现出强烈的相关进化信号；(2)在它们历史的早期，触角鱼分割了运动形态和功能空间；(3)没有强有力的证据表明，谱系多样化的脉冲伴随着表型多样化的主要时期。总而言之，这些发现表明，一种独特的运动模式的获得驱动了扳机鱼的早期形状和功能的辐射，而不是物种的早期辐射。
Innovations in locomotor morphology have been invoked as important drivers of vertebrate diversification, although the influence of novel locomotion strategies on marine fish diversification remains largely unexplored. Using triggerfish as a case study, we determine whether the evolution of the distinctive synchronization of enlarged dorsal and anal fins that triggerfish use to swim may have catalyzed the ecological diversification of the group. By adopting a comparative phylogenetic approach to quantify median fin and body shape integration and to assess the tempo of functional and morphological evolution in locomotor traits, we find that: (1) functional and morphological components of the locomotive system exhibit a strong signal of correlated evolution; (2) triggerfish partitioned locomotor morphological and functional spaces early in their history; and (3) there is no strong evidence that a pulse of lineage diversification accompanied the major episode of phenotypic diversification. Together these findings suggest that the acquisition of a distinctive mode of locomotion drove an early radiation of shape and function in triggerfish, but not an early radiation of species.