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Zoomorphology

, Volume 132, Issue 2, pp 197–213 | Cite as

Diversification of the pectoral fin shape in damselfishes (Perciformes, Pomacentridae) of the Eastern Pacific

  • R. Aguilar-MedranoEmail author
  • B. Frédérich
  • E. F. Balart
  • E. de Luna
Original Paper

Abstract

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.

Keywords

Ecomorphology Geometric morphometrics Locomotion Reef fishes Swimming Territorial behavior 

Notes

Acknowledgments

We thank the Consejo Nacional de Ciencia y Tecnología (CONACYT, México) for a doctoral scholarship support to RAM to develop this work. Thanks to Lucia Campos Dávila (CIBNOR), Sandra J. Raredon (USNM), H.J. Walkers (SIO), Philip A. Hastings (SIO), Victor Cota Gómez (CICIMAR), José De La Cruz Agüero (CICIMAR) and Rick Feeney (LACM) for their help in the museum collections. Thanks also to Ismael Mascareñas Osorio, Fernando Aranceta Garza, Rafael Cabral, Juan J. Ramírez Rosas, Mario Cota Castro and Enrique Calvillo, all from CIBNOR, and Deivis S. Palacios from CICIMAR, for their enthusiastic assistance in the field trips. This work was supported in part by the Centro de Investigaciones Biológicas del Noroeste, México (projects EP2 and EP3), the National Commission for the Knowledge and Use of Biodiversity of México (CONABIO/CT001), National Council of Science and Technology of México (CONACYT/83339) and Secretary of Environment and Natural Resources (SEMARNAT-CONACYT/023390). Finally, we thank Michel Laurin for his enlightening comments. Bruno Frédérich is a Postdoctoral Researcher at the F.R.S.-FNRS (Belgium).

Supplementary material

435_2012_178_MOESM1_ESM.doc (109 kb)
Supplementary material 1 (DOC 109 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • R. Aguilar-Medrano
    • 1
    Email author
  • B. Frédérich
    • 2
  • E. F. Balart
    • 1
  • E. de Luna
    • 3
  1. 1.Laboratorio de Necton y Ecología de ArrecifesCentro de Investigaciones Biológicas del NoroesteMexicoMexico
  2. 2.Laboratoire de Morphologie fonctionnelle et évolutive, Institut de Chimie (B6c)Université de LiègeLiègeBelgium
  3. 3.Departamento de Biodiversidad y SistemáticaInstituto de Ecología, ACXalapaMexico

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