Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators

Detalhes bibliográficos
Autor(a) principal: Rabaça, J.E.
Data de Publicação: 2011
Outros Autores: Lourenço, Rui, Penteriani, Vincenzo, Delgado, Maria del Mar, Marchi-Bartolozzi, Michela
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/4213
Resumo: Intraguild predation (IGP) has been explained in terms of competitor-removal, food-stress and predator removal hypotheses. Only the first two hypotheses have been fairly well studied. To test the predator-removal hypothesis as a force determining IGP in avian predators, we performed a field experiment to simulate the presence of an IG predator (eagle owl Bubo bubo dummy) in the surrounding of the nests of four potential IG prey (black kite Milvus migrans, red kite Milvus milvus, booted eagle Aquila pennata and common buzzard Buteo buteo). To discard the possibility that an aggressive reaction towards the eagle owl was not related to the presence of the IG predator, we also presented a stuffed tawny owl Strix aluco, which is a potential competitor but cannot be considered an IG predator of the studied diurnal raptors considered in the experiment. While almost always ignoring the tawny owl, raptors chiefly showed an interspecific aggressive behaviour towards their IG predator. Our results seem to support the predator-removal hypothesis, as the IG prey may take advantage of the diurnal inactivity of the IG predator to remove it from their territory. However, the recorded behaviour may be also considered as a special variety of mobbing (i.e. a prey’s counter-strategy against its predator), where the mobber is sufficiently powerful to escalate predator harassment into deliberate killing attempts. In their turn, eagle owls can respond with an IG predatory behaviour aimed at removing IG prey species which are highly aggressive mobbers.
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spelling Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predatorsBubo bubosuperpredationIntraguild predation (IGP) has been explained in terms of competitor-removal, food-stress and predator removal hypotheses. Only the first two hypotheses have been fairly well studied. To test the predator-removal hypothesis as a force determining IGP in avian predators, we performed a field experiment to simulate the presence of an IG predator (eagle owl Bubo bubo dummy) in the surrounding of the nests of four potential IG prey (black kite Milvus migrans, red kite Milvus milvus, booted eagle Aquila pennata and common buzzard Buteo buteo). To discard the possibility that an aggressive reaction towards the eagle owl was not related to the presence of the IG predator, we also presented a stuffed tawny owl Strix aluco, which is a potential competitor but cannot be considered an IG predator of the studied diurnal raptors considered in the experiment. While almost always ignoring the tawny owl, raptors chiefly showed an interspecific aggressive behaviour towards their IG predator. Our results seem to support the predator-removal hypothesis, as the IG prey may take advantage of the diurnal inactivity of the IG predator to remove it from their territory. However, the recorded behaviour may be also considered as a special variety of mobbing (i.e. a prey’s counter-strategy against its predator), where the mobber is sufficiently powerful to escalate predator harassment into deliberate killing attempts. In their turn, eagle owls can respond with an IG predatory behaviour aimed at removing IG prey species which are highly aggressive mobbers.2012-01-26T10:10:30Z2012-01-262011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/4213http://hdl.handle.net/10174/4213porRabaça, J.E.; Rui Lourenço; Vincenzo Penteriani; Maria del Mar Delgado; Michela Marchi-Bartolozzi. Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators, Behavioral Ecology and Sociobiology, 65, 9, 1709-1714, 2011.ICAAMjrabaca@uevora.ptlourenco@uevora.ptndndnd221Rabaça, J.E.Lourenço, RuiPenteriani, VincenzoDelgado, Maria del MarMarchi-Bartolozzi, Michelainfo: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:RCAAP2024-01-03T18:41:22Zoai:dspace.uevora.pt:10174/4213Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:59:14.866486Repositório 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 Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators
title Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators
spellingShingle Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators
Rabaça, J.E.
Bubo bubo
superpredation
title_short Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators
title_full Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators
title_fullStr Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators
title_full_unstemmed Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators
title_sort Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators
author Rabaça, J.E.
author_facet Rabaça, J.E.
Lourenço, Rui
Penteriani, Vincenzo
Delgado, Maria del Mar
Marchi-Bartolozzi, Michela
author_role author
author2 Lourenço, Rui
Penteriani, Vincenzo
Delgado, Maria del Mar
Marchi-Bartolozzi, Michela
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Rabaça, J.E.
Lourenço, Rui
Penteriani, Vincenzo
Delgado, Maria del Mar
Marchi-Bartolozzi, Michela
dc.subject.por.fl_str_mv Bubo bubo
superpredation
topic Bubo bubo
superpredation
description Intraguild predation (IGP) has been explained in terms of competitor-removal, food-stress and predator removal hypotheses. Only the first two hypotheses have been fairly well studied. To test the predator-removal hypothesis as a force determining IGP in avian predators, we performed a field experiment to simulate the presence of an IG predator (eagle owl Bubo bubo dummy) in the surrounding of the nests of four potential IG prey (black kite Milvus migrans, red kite Milvus milvus, booted eagle Aquila pennata and common buzzard Buteo buteo). To discard the possibility that an aggressive reaction towards the eagle owl was not related to the presence of the IG predator, we also presented a stuffed tawny owl Strix aluco, which is a potential competitor but cannot be considered an IG predator of the studied diurnal raptors considered in the experiment. While almost always ignoring the tawny owl, raptors chiefly showed an interspecific aggressive behaviour towards their IG predator. Our results seem to support the predator-removal hypothesis, as the IG prey may take advantage of the diurnal inactivity of the IG predator to remove it from their territory. However, the recorded behaviour may be also considered as a special variety of mobbing (i.e. a prey’s counter-strategy against its predator), where the mobber is sufficiently powerful to escalate predator harassment into deliberate killing attempts. In their turn, eagle owls can respond with an IG predatory behaviour aimed at removing IG prey species which are highly aggressive mobbers.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01T00:00:00Z
2012-01-26T10:10:30Z
2012-01-26
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/10174/4213
http://hdl.handle.net/10174/4213
url http://hdl.handle.net/10174/4213
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Rabaça, J.E.; Rui Lourenço; Vincenzo Penteriani; Maria del Mar Delgado; Michela Marchi-Bartolozzi. Kill fore being killed: an experimental approach supports the predator-removal hypothesis as a determinant of intraguild predation in top predators, Behavioral Ecology and Sociobiology, 65, 9, 1709-1714, 2011.
ICAAM
jrabaca@uevora.pt
lourenco@uevora.pt
nd
nd
nd
221
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