Male aggressiveness in a polygynous ungulate varies with social and ecological context
Aggression is a social behaviour which can be affected by numerous factors. The quality and quantity of food resources may play an important role in the aggressiveness of territorial ungulates as the defence of these resources influences female choice and mating opportunities. However, the relationship between food resources and aggression remains poorly understood. We assessed the ecological and social factors that influence aggression in Lama guanicoe, a territorial ungulate exhibiting resource-defence polygyny, during three periods (group-formation, mating and post-mating) in the reproductive seasons of 2014 and 2016. We recorded 460 focal observations of territorial (family groups, solitary) and non-territorial (mixed and bachelor groups) males. We performed analyses at the population level (including all focal observations) and at the group level (each social unit separately), to test whether the factors that influence aggression differ at these different scales. We also identified proxies of vegetation quality as potential predictors of aggression. At the population level, we found that the presence of aggressive behaviour peaked during the mating season and that post-mating aggression may have been driven by inter-annual environmental variations. For family groups and solitary males, variables reflecting high vegetation quality/quantity were predictors of aggressive behaviour, reflecting the resource-defence strategy of this species. Conversely, for mixed-group males, aggression may be more associated with social instability and group size, although this hypothesis has yet to be tested. Our research reinforces the idea that aggression can occur in multiple contexts depending on male status (e.g. territorial or non-territorial) and contributes to our understanding of how ecological (i.e. availability of food resources) and social factors influence aggression in a territorial ungulate.
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Wiley
2021-01
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Subjects: | Ungulados, Guanaco, Comportamiento Animal, Comportamiento Agresivo, Animal Macho, Ungulates, Guanacos, Animal Behaviour, Aggressive Behaviour, Male Animals, Lama guanicoe, |
Online Access: | http://hdl.handle.net/20.500.12123/13885 https://onlinelibrary.wiley.com/doi/abs/10.1111/eth.13100 https://doi.org/10.1111/eth.13100 |
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Ungulados Guanaco Comportamiento Animal Comportamiento Agresivo Animal Macho Ungulates Guanacos Animal Behaviour Aggressive Behaviour Male Animals Lama guanicoe Ungulados Guanaco Comportamiento Animal Comportamiento Agresivo Animal Macho Ungulates Guanacos Animal Behaviour Aggressive Behaviour Male Animals Lama guanicoe |
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Ungulados Guanaco Comportamiento Animal Comportamiento Agresivo Animal Macho Ungulates Guanacos Animal Behaviour Aggressive Behaviour Male Animals Lama guanicoe Ungulados Guanaco Comportamiento Animal Comportamiento Agresivo Animal Macho Ungulates Guanacos Animal Behaviour Aggressive Behaviour Male Animals Lama guanicoe Panebianco, Antonella Gregorio, Pablo Francisco Ovejero Aguilar, Ramiro Jose Antonio Marozzi, Antonela Alejandra Ruiz Blanco, Cynthia Mariel Leggieri, Leonardo Ramón Taraborelli, Paula Andrea Carmanchahi, Pablo Daniel Male aggressiveness in a polygynous ungulate varies with social and ecological context |
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Aggression is a social behaviour which can be affected by numerous factors. The quality and quantity of food resources may play an important role in the aggressiveness of territorial ungulates as the defence of these resources influences female choice and mating opportunities. However, the relationship between food resources and aggression remains poorly understood. We assessed the ecological and social factors that influence aggression in Lama guanicoe, a territorial ungulate exhibiting resource-defence polygyny, during three periods (group-formation, mating and post-mating) in the reproductive seasons of 2014 and 2016. We recorded 460 focal observations of territorial (family groups, solitary) and non-territorial (mixed and bachelor groups) males. We performed analyses at the population level (including all focal observations) and at the group level (each social unit separately), to test whether the factors that influence aggression differ at these different scales. We also identified proxies of vegetation quality as potential predictors of aggression. At the population level, we found that the presence of aggressive behaviour peaked during the mating season and that post-mating aggression may have been driven by inter-annual environmental variations. For family groups and solitary males, variables reflecting high vegetation quality/quantity were predictors of aggressive behaviour, reflecting the resource-defence strategy of this species. Conversely, for mixed-group males, aggression may be more associated with social instability and group size, although this hypothesis has yet to be tested. Our research reinforces the idea that aggression can occur in multiple contexts depending on male status (e.g. territorial or non-territorial) and contributes to our understanding of how ecological (i.e. availability of food resources) and social factors influence aggression in a territorial ungulate. |
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Ungulados Guanaco Comportamiento Animal Comportamiento Agresivo Animal Macho Ungulates Guanacos Animal Behaviour Aggressive Behaviour Male Animals Lama guanicoe |
author |
Panebianco, Antonella Gregorio, Pablo Francisco Ovejero Aguilar, Ramiro Jose Antonio Marozzi, Antonela Alejandra Ruiz Blanco, Cynthia Mariel Leggieri, Leonardo Ramón Taraborelli, Paula Andrea Carmanchahi, Pablo Daniel |
author_facet |
Panebianco, Antonella Gregorio, Pablo Francisco Ovejero Aguilar, Ramiro Jose Antonio Marozzi, Antonela Alejandra Ruiz Blanco, Cynthia Mariel Leggieri, Leonardo Ramón Taraborelli, Paula Andrea Carmanchahi, Pablo Daniel |
author_sort |
Panebianco, Antonella |
title |
Male aggressiveness in a polygynous ungulate varies with social and ecological context |
title_short |
Male aggressiveness in a polygynous ungulate varies with social and ecological context |
title_full |
Male aggressiveness in a polygynous ungulate varies with social and ecological context |
title_fullStr |
Male aggressiveness in a polygynous ungulate varies with social and ecological context |
title_full_unstemmed |
Male aggressiveness in a polygynous ungulate varies with social and ecological context |
title_sort |
male aggressiveness in a polygynous ungulate varies with social and ecological context |
publisher |
Wiley |
publishDate |
2021-01 |
url |
http://hdl.handle.net/20.500.12123/13885 https://onlinelibrary.wiley.com/doi/abs/10.1111/eth.13100 https://doi.org/10.1111/eth.13100 |
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oai:localhost:20.500.12123-138852023-01-11T14:53:39Z Male aggressiveness in a polygynous ungulate varies with social and ecological context Panebianco, Antonella Gregorio, Pablo Francisco Ovejero Aguilar, Ramiro Jose Antonio Marozzi, Antonela Alejandra Ruiz Blanco, Cynthia Mariel Leggieri, Leonardo Ramón Taraborelli, Paula Andrea Carmanchahi, Pablo Daniel Ungulados Guanaco Comportamiento Animal Comportamiento Agresivo Animal Macho Ungulates Guanacos Animal Behaviour Aggressive Behaviour Male Animals Lama guanicoe Aggression is a social behaviour which can be affected by numerous factors. The quality and quantity of food resources may play an important role in the aggressiveness of territorial ungulates as the defence of these resources influences female choice and mating opportunities. However, the relationship between food resources and aggression remains poorly understood. We assessed the ecological and social factors that influence aggression in Lama guanicoe, a territorial ungulate exhibiting resource-defence polygyny, during three periods (group-formation, mating and post-mating) in the reproductive seasons of 2014 and 2016. We recorded 460 focal observations of territorial (family groups, solitary) and non-territorial (mixed and bachelor groups) males. We performed analyses at the population level (including all focal observations) and at the group level (each social unit separately), to test whether the factors that influence aggression differ at these different scales. We also identified proxies of vegetation quality as potential predictors of aggression. At the population level, we found that the presence of aggressive behaviour peaked during the mating season and that post-mating aggression may have been driven by inter-annual environmental variations. For family groups and solitary males, variables reflecting high vegetation quality/quantity were predictors of aggressive behaviour, reflecting the resource-defence strategy of this species. Conversely, for mixed-group males, aggression may be more associated with social instability and group size, although this hypothesis has yet to be tested. Our research reinforces the idea that aggression can occur in multiple contexts depending on male status (e.g. territorial or non-territorial) and contributes to our understanding of how ecological (i.e. availability of food resources) and social factors influence aggression in a territorial ungulate. EEA Barrow Fil: Panebianco, Antonella. Universidad Nacional del Comahue. Asentamiento Universidad San Martin de Los Andes; Argentina Fil: Panebianco, Antonella. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; Argentina Fil: Gregorio, Pablo Francisco. Universidad Nacional del Comahue. Asentamiento Universidad San Martin de Los Andes; Argentina Fil: Gregorio, Pablo Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; Argentina Fil: Ovejero Aguilar, Ramiro Jose Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ecología Regional; Argentina Fil: Ovejero Aguilar, Ramiro Jose Antonio. Universidad Nacional de Tucumán. Instituto de Ecología Regional; Argentina Fil: Ovejero Aguilar, Ramiro Jose Antonio. Universidad Austral de Chile. Facultad de Ciencias. Instituto de Ciencias Ambientales y Evolutivas. Laboratorio de Ecología Conductual; Chile Fil: Marozzi, Antonela Alejandra. Universidad Nacional del Comahue. Asentamiento Universidad San Martin de Los Andes; Argentina Fil: Marozzi, Antonela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; Argentina Fil: Ruiz Blanco, Cynthia Mariel. Wildlife Conservation Society. Programa Estepa Patagónica y Andina; Argentina Fil: Leggieri, Leonardo Ramón. Universidad Nacional del Comahue. Asentamiento Universidad San Martin de Los Andes; Argentina Fil: Leggieri, Leonardo Ramón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; Argentina Fil: Taraborelli, Paula Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Barrow; Argentina Fil: Carmanchahi, Pablo Daniel. Universidad Nacional del Comahue. Asentamiento Universidad San Martin de Los Andes; Argentina Fil: Carmanchahi, Pablo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; Argentina 2023-01-11T14:51:45Z 2023-01-11T14:51:45Z 2021-01 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/13885 https://onlinelibrary.wiley.com/doi/abs/10.1111/eth.13100 0179-1613 1439-0310 https://doi.org/10.1111/eth.13100 eng info:eu-repo/semantics/restrictedAccess application/pdf Wiley Ethology 127 (1) : 68-82. (January 2021) |