Feeding innovations and the first coral-feeding fishes

Huertas, Victor, and Bellwood, David R. (2018) Feeding innovations and the first coral-feeding fishes. Coral Reefs, 37 (3). pp. 649-658.

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Tubelip wrasses were probably the first modern fish group to feed on corals, an ability that has been linked to their unusual lips. However, the only detailed account of these lips is based on a qualitative description of one tubelip wrasse species. Here, we provide the first quantitative evaluation of the lips of a broad range of wrasses and offer insights into the functional role of lips in coral-feeding fishes. A phylogenetic principal components analysis of 27 morphological traits revealed a clear differentiation between the lips of three coral-feeding tubelip wrasse genera (Labrichthys, Labropsis, and Diproctacanthus) and 12 non-corallivorous genera. This separation among taxa was based primarily on the presence of a glandular lip epithelium in tubelip wrasses. Our findings support the hypothesis that mucus secretion in the lips of tubelip wrasses plays a key role in their coral-feeding ecology, and highlight the value of soft anatomy in enabling fishes to exploit novel trophic resources.

Item ID: 55624
Item Type: Article (Research - C1)
ISSN: 1432-0975
Keywords: Corallivory, Fish lips, Coral reefs, Tubelip wrasses, Labridae, Functional morphology
Copyright Information: © Springer-Verlag GmbH Germany, part of Springer Nature 2018
Funders: Australian Research Council (ARC)
Projects and Grants: ARC grant no. CE140100020
Date Deposited: 19 Sep 2018 09:37
FoR Codes: 31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310403 Biological adaptation @ 100%
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