Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fish
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.12/4028 |
Resumo: | In many territorial species androgen hormones are known to increase in response to territorial intrusions as a way to adjust the expression of androgen-dependent behaviour to social challenges. The dear enemy effect has also been described in territorial species and posits that resident individuals show a more aggressive response to intrusions by strangers than by other territorial neighbours. Therefore, we hypothesized that the dear enemy effect may also modulate the androgen response to a territorial intrusion. Here we tested this hypothesis in male cichlid fish (Mozambique tilapia, Oreochromis mossambicus) using a paradigm of four repeated territorial intrusions, either by the same neighbour or by four different unfamiliar intruders. Neighbour intruders elicited lower aggression and a weaker androgen response than strangers on the first intrusion of the experiment. With repeated intrusions, the agonistic behaviour of the resident males against familiar intruders was similar to that displayed towards strangers. By the fourth intrusion the androgen response was significantly reduced and there was no longer a difference between the responses to the two types of intruders. These results suggest that the dear enemy effect modulates the androgen response to territorial intrusions and that repeated intrusions lead to a habituation of the androgen response. |
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Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fishIn many territorial species androgen hormones are known to increase in response to territorial intrusions as a way to adjust the expression of androgen-dependent behaviour to social challenges. The dear enemy effect has also been described in territorial species and posits that resident individuals show a more aggressive response to intrusions by strangers than by other territorial neighbours. Therefore, we hypothesized that the dear enemy effect may also modulate the androgen response to a territorial intrusion. Here we tested this hypothesis in male cichlid fish (Mozambique tilapia, Oreochromis mossambicus) using a paradigm of four repeated territorial intrusions, either by the same neighbour or by four different unfamiliar intruders. Neighbour intruders elicited lower aggression and a weaker androgen response than strangers on the first intrusion of the experiment. With repeated intrusions, the agonistic behaviour of the resident males against familiar intruders was similar to that displayed towards strangers. By the fourth intrusion the androgen response was significantly reduced and there was no longer a difference between the responses to the two types of intruders. These results suggest that the dear enemy effect modulates the androgen response to territorial intrusions and that repeated intrusions lead to a habituation of the androgen response.Fundação para a Ciencia e a Tecnologia (FCT)Public Library ScienceRepositório do ISPAAires, Rui F.Oliveira, Gonçalo A.Oliveira, Tânia Sofia Ferreira deRos, Albert F. H.Oliveira, Rui Filipe2015-10-24T09:48:25Z2015-01-01T00:00:00Z2015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.12/4028engPlos One, 10(9), e0137705. doi:10.1371/journal.pone.01377051932-620310.1371/journal.pone.0137705info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-05T16:39:47Zoai:repositorio.ispa.pt:10400.12/4028Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:21:51.888514Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fish |
title |
Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fish |
spellingShingle |
Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fish Aires, Rui F. |
title_short |
Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fish |
title_full |
Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fish |
title_fullStr |
Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fish |
title_full_unstemmed |
Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fish |
title_sort |
Dear enemies elicit lower androgen responses to territorial challenges than unfamiliar intruders in a cichlid fish |
author |
Aires, Rui F. |
author_facet |
Aires, Rui F. Oliveira, Gonçalo A. Oliveira, Tânia Sofia Ferreira de Ros, Albert F. H. Oliveira, Rui Filipe |
author_role |
author |
author2 |
Oliveira, Gonçalo A. Oliveira, Tânia Sofia Ferreira de Ros, Albert F. H. Oliveira, Rui Filipe |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Repositório do ISPA |
dc.contributor.author.fl_str_mv |
Aires, Rui F. Oliveira, Gonçalo A. Oliveira, Tânia Sofia Ferreira de Ros, Albert F. H. Oliveira, Rui Filipe |
description |
In many territorial species androgen hormones are known to increase in response to territorial intrusions as a way to adjust the expression of androgen-dependent behaviour to social challenges. The dear enemy effect has also been described in territorial species and posits that resident individuals show a more aggressive response to intrusions by strangers than by other territorial neighbours. Therefore, we hypothesized that the dear enemy effect may also modulate the androgen response to a territorial intrusion. Here we tested this hypothesis in male cichlid fish (Mozambique tilapia, Oreochromis mossambicus) using a paradigm of four repeated territorial intrusions, either by the same neighbour or by four different unfamiliar intruders. Neighbour intruders elicited lower aggression and a weaker androgen response than strangers on the first intrusion of the experiment. With repeated intrusions, the agonistic behaviour of the resident males against familiar intruders was similar to that displayed towards strangers. By the fourth intrusion the androgen response was significantly reduced and there was no longer a difference between the responses to the two types of intruders. These results suggest that the dear enemy effect modulates the androgen response to territorial intrusions and that repeated intrusions lead to a habituation of the androgen response. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-10-24T09:48:25Z 2015-01-01T00:00:00Z 2015-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.12/4028 |
url |
http://hdl.handle.net/10400.12/4028 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Plos One, 10(9), e0137705. doi:10.1371/journal.pone.0137705 1932-6203 10.1371/journal.pone.0137705 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Public Library Science |
publisher.none.fl_str_mv |
Public Library Science |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799130079405539328 |