[en] Fin shape strongly influences performance of locomotion across all swimming styles. In this study, we focused on the diversity of the pectoral fin morphology in damselfishes of the Eastern Pacific. Underwater observations and a review of literature allowed the characterization of ten behavioral groups. Territorial and non-territorial species were discriminated easily with traditional morphometrics. Five ecomorphological groups were recognized by geometric morphometric analyses. Geometric data segregated the outgroup from the damselfishes and allowed the distinction of mean morphologies from extreme ones within territorial and non-territorial species. Additionally, geometric morphometric data split Abudefduf into two groups: (1) A. troschelii is similar to C. atrilobata and (2) A. concolor and A. declivifrons are close to Stegastes. Solitary territorial species (e.g., Stegastes) show rounded and high fins whereas non-territorial species living in groups (e.g., Chromis) present long and curved pectoral fins. In the range of morphological variation, the morphologies of Microspathodon (elongate with highly curved hydrodynamic trailing edge) and Azurina (long, slender and angular) represent the extreme morphologies within territorial and non-territorial species, respectively. Our study revealed a strong relationship between the pectoral fin shape and the behavioral diversification in damselfishes.
Centre/Unité de recherche :
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
Disciplines :
Zoologie
Auteur, co-auteur :
Aguilar-Medrano, Rosalia
Frederich, Bruno ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Balart, Eduardo F.
de Luna, Efrain
Langue du document :
Anglais
Titre :
Diversification of the pectoral fin shape in damselfishes (Perciformes, Pomacentridae) of the Eastern Pacific
Date de publication/diffusion :
juin 2013
Titre du périodique :
Zoomorphology
ISSN :
0720-213X
eISSN :
1432-234X
Maison d'édition :
Springer Science & Business Media B.V.
Peer reviewed :
Peer reviewed vérifié par ORBi
Intitulé du projet de recherche :
CONACYT/83339; SEMARNAT-CONACYT/023390
Organisme subsidiant :
CONACYT - Consejo Nacional de Ciencia y Tecnología Centro de Investigaciones Biologicas del Noroeste, Mexico (projects EP2 and EP3) FRFC - Fonds de la Recherche Fondamentale Collective
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