Colour, location and movement: what do models tell us about predation on colour morphs of a poison frog from eastern Amazonia?
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Instituto Nacional de Pesquisas da Amazônia, Coordenação de Pesquisas em Biodiversidade, Av. André Araújo, 2936, 69011-970, Manaus, AM, Brazil
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Instituto Nacional de Pesquisas da Amazônia, Coordenação de Pesquisas em Biodiversidade, Av. André Araújo, 2936, 69011-970, Manaus, AM, Brazil
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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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Colour, location and movement: what do models tell us about predation on colour morphs of a poison frog from eastern Amazonia?
In: BehaviourSearch for other papers by Sulamita M.C. da Rocha in
Current site
Google Scholar
PubMed
Instituto Nacional de Pesquisas da Amazônia, Coordenação de Pesquisas em Biodiversidade, Av. André Araújo, 2936, 69011-970, Manaus, AM, Brazil
Search for other papers by William E. Magnusson in
Current site
Google Scholar
PubMed
Search for other papers by Diana Rojas in
Current site
Google Scholar
PubMed
Instituto Nacional de Pesquisas da Amazônia, Coordenação de Pesquisas em Biodiversidade, Av. André Araújo, 2936, 69011-970, Manaus, AM, Brazil
Search for other papers by Albertina P. Lima in
Current site
Google Scholar
PubMed
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.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 1301 | 189 | 16 |
| Full Text Views | 61 | 4 | 0 |
| PDF Views & Downloads | 113 | 7 | 0 |
