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Zoomorphology

, Volume 135, Issue 1, pp 103–114 | Cite as

Ecomorphological diversification in reef fish of the genus Abudefduf (Percifomes, Pomacentridae)

  • Rosalía Aguilar-Medrano
  • Paul H. Barber
Original Paper

Abstract

Coral reefs are home to the most diverse fish assemblages on earth. This high diversity has been hypothesized to partially result from fine-scale niche partitioning of resources. Because niche partitioning might be facilitated by phenotypic diversity, analysis of the morphological variation in an evolutionary context can contribute to our understanding of the speciation and diversification of reef fish. Damselfishes (Pomacentridae) are an extremely diverse group of reef fishes, and Abudefduf genus is one of the youngest clades of this family. Abudefduf is basal clade group benthic feeders, feeding on algae, small benthic invertebrates and zooplankton. In contrast, more derived clades feed primarily on zooplankton. In this study, we examine the relation between morphological and ecological variation to determine the main forces driving diversification in Abudefduf. Results support clear ecomorphological segregation among basal and derived clades, indicating evolution from benthic feeders to zooplanktivorous feeders, suggesting that the shift to a new trophic niche was an important event driving diversification in Abudefduf, and also evidenced by the presence of morphological traits that represent specialized adaptations to chase plankton in the water column. Our analysis demonstrates the utility of morphological and ecological studies to understand the diversification process of reef fish.

Keywords

Reef fish Diversification Ecology Morphology Pomacentridae 

Notes

Acknowledgments

Consejo Nacional de Ciencia y Tecnología (CONACYT), Mexico and University of California Institute for Mexico and the United States (UC MEXUS), USA, funded the postdoctoral research of R. Aguilar-Medrano. We thank Lucia Campos Dávila (CIBNOR), Eduardo F. Balart (CIBNOR), 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 with the museum collections.

Supplementary material

435_2015_291_MOESM1_ESM.doc (35 kb)
Supplementary material 1 (DOC 35 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of Ecology and Evolutionary BiologyUniversity of California, Los AngelesLos AngelesUSA
  2. 2.Instituto de Ecología AplicadaUniversidad Autónoma de TamaulipasCiudad VictoriaMexico

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