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Colour, location and movement: what do models tell us about predation on colour morphs of a poison frog from eastern Amazonia?

于Behaviour
著者:
Sulamita M.C. da Rocha Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Ecologia, Av. André, Araújo 2936, 69011-970 Manaus, AM, Brazil

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https://orcid.org/0000-0002-7421-0735
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William E. Magnusson Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Ecologia, Av. André, Araújo 2936, 69011-970 Manaus, AM, Brazil
Instituto Nacional de Pesquisas da Amazônia, Coordenação de Pesquisas em Biodiversidade, Av. André Araújo, 2936, 69011-970, Manaus, AM, Brazil

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https://orcid.org/0000-0003-1988-3950
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Diana Rojas Ecopescado, P.O. Box 37, 69640-000 Tabatinga, AM, Brazil

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https://orcid.org/0000-0002-0778-4827
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Albertina P. Lima Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Ecologia, Av. André, Araújo 2936, 69011-970 Manaus, AM, Brazil
Instituto Nacional de Pesquisas da Amazônia, Coordenação de Pesquisas em Biodiversidade, Av. André Araújo, 2936, 69011-970, Manaus, AM, Brazil

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https://orcid.org/0000-0003-4586-5633
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Abstract

Many dendrobatid frogs are known to be aposematic: brightly coloured and unpalatable to predators. To deceive predators, frog models used to test for predatory colour bias must be similar in size, colour, shape, and movement to frogs. We carried out an experiment with moving models of the species Adelphobates galactonotus, in two localities. A. galactonotus is a polytypic frog and each population of the species has a distinct colour. Birds and mammals were the vertebrates responsible for the marks on the models, but there was no difference in frequency of attacks on local-, non-local- and cryptic-colour models. Only invertebrates avoided cryptic models. Different populations of the species seem to be under different predation pressure, but colour differentiation in this species is probably related to other mechanisms, such as sexual selection.

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