Barros Breno, Sakai Yoichi, Pereira Pedro H C, Gasset Eric, Buchet Vincent, Maamaatuaiahutapu Moana, Ready Jonathan S, Oliveira Yrlan, Giarrizzo Tommaso, Vallinoto Marcelo
Universidade Federal do Pará - Campus de Bragança. Instituto de Estudos Costeiros-Laboratório de Evolução. Alameda Leandro Ribeiro, s/n, Aldeia, CEP 68600-000 Bragança, Pará, Brazil.
Graduate School of Biosphere Sciences, Laboratory of Aquatic Resources, Hiroshima University, Kagamiyama, 1-4-4, 739-0046, Higashi-Hiroshima, Japan.
PLoS One. 2015 Dec 2;10(12):e0143838. doi: 10.1371/journal.pone.0143838. eCollection 2015.
Mimesis is a relatively widespread phenomenon among reef fish, but the ontogenetic processes relevant for mimetic associations in fish are still poorly understood. In the present study, the allometric growth of two allopatric leaf-mimetic species of ephippid fishes, Chaetodipterus faber from the Atlantic and Platax orbicularis from the Indo-Pacific, was analyzed using ten morphological variables. The development of fins was considered owing to the importance of these structures for mimetic behaviors during early life stages. Despite the anatomical and behavioral similarities in both juvenile and adult stages, C. faber and P. orbicularis showed distinct patterns of growth. The overall shape of C. faber transforms from a rounded-shape in mimetic juveniles to a lengthened profile in adults, while in P. orbicularis, juveniles present an oblong profile including dorsal and anal fins, with relative fin size diminishing while the overall profile grows rounder in adults. Although the two species are closely-related, the present results suggest that growth patterns in C. faber and P. orbicularis are different, and are probably independent events in ephippids that have resulted from similar selective processes.
拟态在珊瑚礁鱼类中是一种相对普遍的现象，但鱼类中与拟态关联相关的个体发育过程仍未得到充分理解。在本研究中，使用十个形态变量分析了两种异域分布的叶形拟态的蝙蝠鱼的异速生长，即来自大西洋的黄斑蝙蝠鱼（Chaetodipterus faber）和来自印度-太平洋的圆眼燕鱼（Platax orbicularis）。由于这些结构在幼体早期阶段对于拟态行为的重要性，因此对鳍的发育进行了研究。尽管黄斑蝙蝠鱼和圆眼燕鱼在幼体和成体阶段在解剖学和行为上存在相似之处，但它们显示出不同的生长模式。黄斑蝙蝠鱼的整体形状从拟态幼体的圆形转变为成体的拉长形态，而在圆眼燕鱼中，幼体呈现出包括背鳍和臀鳍的长方形形态，随着整体形态在成体中变得更圆，鳍的相对大小减小。尽管这两个物种关系密切，但目前的结果表明，黄斑蝙蝠鱼和圆眼燕鱼的生长模式不同，并且可能是蝙蝠鱼中由相似选择过程导致的独立事件。
