Interspecific aggression for nest sites: Model experiments with long-tailed finches (Poephila acuticauda) and endangered gouldian finches (Erythrura gouldiae)
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Pearce, Dhanya; Pryke, Sarah; Griffith, Simon C.
Description
For cavity-nesting birds, tree cavities often represent a critical, defendable, and limiting resource that is frequently under intense interspecific competition. However, the dynamics of interspecific conflict resolution, especially between species of similar size, are often unclear. We experimentally tested aggression and nest-defense behaviors in Gouldian Finches (Erythrura gouldiae) and Longtailed Finches (Poephila acuticauda), two sympatric, cavity-nesting estrildid finches that are very...[Show more]
dc.contributor.author | Pearce, Dhanya | |
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dc.contributor.author | Pryke, Sarah | |
dc.contributor.author | Griffith, Simon C. | |
dc.date.accessioned | 2015-12-13T22:42:03Z | |
dc.identifier.issn | 0004-8038 | |
dc.identifier.uri | http://hdl.handle.net/1885/78796 | |
dc.description.abstract | For cavity-nesting birds, tree cavities often represent a critical, defendable, and limiting resource that is frequently under intense interspecific competition. However, the dynamics of interspecific conflict resolution, especially between species of similar size, are often unclear. We experimentally tested aggression and nest-defense behaviors in Gouldian Finches (Erythrura gouldiae) and Longtailed Finches (Poephila acuticauda), two sympatric, cavity-nesting estrildid finches that are very similar in size, ecology, and nest-site requirements. Mounted taxidermic models of conspecific and heterospecific nest-site competitors (black and red Gouldian Finch morph and Long-tailed Finch models), as well as a control noncompetitor (Black-chinned Honeyeater [Melithreptus gularis]), were presented to Gouldian and Long-tailed finches. These two competing species differed in their overall responses to simulated intruders and in their relative aggression toward conspecific and heterospecific intruders. Long-tailed Finches reacted more quickly to models, approached closer, and were more likely to attack models (i.e., make physical contact) than Gouldian Finches, which suggests that Long-tailed Finches are intrinsically more aggressive. In addition, Long-tailed Finches were more aggressive toward Gouldian Finches than toward conspecific models. By contrast, Gouldian Finches were more aggressive to conspecific models and avoided approaching Long-tailed Finch models. Male Gouldian Finches were particularly aggressive toward conspecifics, and red head-color morphs were more aggressive than black morphs. These results suggest that the outcomes of competitive asymmetries within and between these species are driven by differences in aggression. Together with the substantial overlap in nest-site use, the Long-tailed Finch's aggressive domination of limited nest sites may lead to competitive exclusion of the endangered Gouldian Finch. | |
dc.publisher | American Ornithologists Union | |
dc.source | Auk | |
dc.subject | Keywords: aggression; conspecific; defense behavior; endangered species; experimental study; interspecific competition; nest site; passerine; Aves; Erythrura gouldiae; Estrildidae; Fringillidae; Meliphagidae; Melithreptus gularis; Poephila acuticauda Cavity nesting; Erythrura gouldiae; Gouldian Finch; Heterospecific aggression; Interspecific competition; Long-tailed Finch; Poephila acuticauda | |
dc.title | Interspecific aggression for nest sites: Model experiments with long-tailed finches (Poephila acuticauda) and endangered gouldian finches (Erythrura gouldiae) | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 128 | |
dc.date.issued | 2011 | |
local.identifier.absfor | 060201 - Behavioural Ecology | |
local.identifier.ariespublication | f5625xPUB7373 | |
local.type.status | Published Version | |
local.contributor.affiliation | Pearce, Dhanya, Macquarie University | |
local.contributor.affiliation | Pryke, Sarah, College of Medicine, Biology and Environment, ANU | |
local.contributor.affiliation | Griffith, Simon C., Macquarie University | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 3 | |
local.bibliographicCitation.startpage | 497 | |
local.bibliographicCitation.lastpage | 505 | |
local.identifier.doi | 10.1525/auk.2011.11085 | |
local.identifier.absseo | 970106 - Expanding Knowledge in the Biological Sciences | |
dc.date.updated | 2016-02-24T09:34:28Z | |
local.identifier.scopusID | 2-s2.0-80051730547 | |
local.identifier.thomsonID | 000293307300007 | |
Collections | ANU Research Publications |
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