Evolutionary history of the butterflyfishes (f: Chaetodontidae) and the rise of coral feeding fishes

Bellwood, D.R., Klanten, S., Cowman, P.F., Pratchett, M.S., Konow, N., and Van Herwerden, L. (2010) Evolutionary history of the butterflyfishes (f: Chaetodontidae) and the rise of coral feeding fishes. Journal of Evolutionary Biology, 23 (2). pp. 335-349.

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Of the 5000 fish species on coral reefs, corals dominate the diet of just 41 species. Most (61%) belong to a single family, the butterflyfishes (Chaetodontidae). We examine the evolutionary origins of chaetodontid corallivory using a new molecular phylogeny incorporating all 11 genera. A 1759-bp sequence of nuclear (S7I1 and ETS2) and mitochondrial (cytochrome b) data yielded a fully resolved tree with strong support for all major nodes. A chronogram, constructed using Bayesian inference with multiple parametric priors, and recent ecological data reveal that corallivory has arisen at least five times over a period of 12 Ma, from 15.7 to 3 Ma. A move onto coral reefs in the Miocene foreshadowed rapid cladogenesis within Chaetodon and the origins of corallivory, coinciding with a global reorganization of coral reefs and the expansion of fast-growing corals. This historical association underpins the sensitivity of specific butterflyfish clades to global coral decline.

Item ID: 10131
Item Type: Article (Research - C1)
ISSN: 1420-9101
Keywords: marine science; biogeography; chronogram; coral reef; innovation; molecular phylogeny; trophic novelty
Date Deposited: 03 Aug 2010 23:13
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060303 Biological Adaptation @ 50%
06 BIOLOGICAL SCIENCES > 0604 Genetics > 060411 Population, Ecological and Evolutionary Genetics @ 50%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%
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