Comparative demography of treecreepers: evaluating hypotheses for the evolution and maintenance of cooperative breeding

Doerr, Erik D.; Doerr, Veronica

doi:10.1016/j.anbehav.2005.10.017

Cited by 41 publications

(41 citation statements)

References 24 publications

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“…Finally, secondyear birds of both sexes acted as helpers, while the majority of helpers are males, a finding consistent with results from other studies (e.g. Curry and Grant 1990;Doerr and Doerr 2006;Cockburn et al 2003), although female helpers are common in some species (Caffrey 1992). We define delayed dispersal as when offspring remain with parents after they are capable of breeding .…”

Section: Discussionsupporting

confidence: 79%

“…Female helping has rarely been considered in the literature (Cockburn 1998; but see Caffrey 1992), presumably because most helpers are males (e.g. Doerr and Doerr 2006;Cockburn 1998Cockburn , 2003. Helping regardless of territory inheritance can probably be explained by kin structure associated with inclusive fitness (Hamilton 1964;Komdeur et al 2006), though this advantage remains unclear, especially for immigrant helpers or those from unknown origins.…”

Section: Discussionmentioning

confidence: 96%

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Sex-bias and timing of natal dispersal in cooperatively breeding Puff-throated Bulbuls Alophoixus pallidus

2010

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While natal dispersal can have a significant impact on population dynamics, it is typically difficult to quantify. We investigated timing of natal dispersal of the cooperatively breeding Puff-throated Bulbul Alophoixus pallidus in a tropical evergreen forest by modelling the probability of staying in or dispersing from their natal territory whilst taking into account the effects of sex, group size, and the presence of helper(s). Birds did not disperse until the beginning of and during the breeding season following the hatching year. Dispersal was strongly femalebiased both in frequency and distance: most females (95%) dispersed away from their natal territories, and of those relocated, traversed 2-7 territories. In contrast, 50% of males remained in the natal territory as helpers in their second year, while relocated dispersing males crossed 1-2 territories. Natal dispersal was not influenced by either group size or the presence of helpers. Males that fledged earlier in the breeding season exhibited higher rates of philopatry than the males that fledged later, but no correlation between fledging date and philopatry was observed in females. The probability of staying in the natal territory during the second year was 0.58 ± 0.14 SE and 0.05 ± 0.04 for males and females, respectively. These findings may add to our understanding of how natal dispersal can reflect social patterns and kin structure in cooperative breeding species from a little-studied tropical forest region.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 96%

Sex-bias and timing of natal dispersal in cooperatively breeding Puff-throated Bulbuls Alophoixus pallidus

2010

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“…A diversity of evolutionary scenarios are now recognised as possible routes to philopatry and cooperation, involving direct and indirect fitness benefits, as well as immediate and long term (Koenig et al 1992;Jennions and Macdonald 1994;Emlen 1995;Pen and Weissing 2000;Solomon 2003;Bach et al 2006;Doerr and Doerr 2006;Lion and Gandon 2009;Communicated by P. Banks Electronic supplementary material The online version of this article (doi:10.1007/s00265-012-1348-x) contains supplementary material, which is available to authorized users. Sparkman et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Ecological bases of philopatry and cooperation in Ethiopian wolves

Marino

Sillero‐Zubiri

Johnson

et al. 2012

Behav Ecol Sociobiol

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Ecological reasons for philopatry and cooperation are frequently invoked when kin selection is an insufficient explanation. The Ethiopian wolf (Canis simensis) is a specialised rodent hunter that forms family groups with cooperative breeding but also lives as monogamous pairs in suboptimal areas. Given the apparent absence of fitness gains to helpers from cooperative breeding, we set out to explore the benefits accrued by communal territorial defence measured as the acquisition and retention of habitats with more and most preferred rodent prey. Pairs defended relatively large territories to encompass critical amounts of key habitats within a matrix poor in rodents. Groups in optimal areas had relatively small territories and were expansionist, such that wolves in larger packs benefited per capita from increased good-quality foraging habitat. The fitness benefits of philopatry became evident after a rabies epizootic, when philopatry and expansionism prevailed in under-saturated conditions, until large groups split or provided dispersers that established locally. This study shows that high concentrations of prey can shift the balance of costs and benefits towards group living and cooperation in long-lived territorial carnivores, in so far as this dictates immediate rewards accrued from a given increment in territory size, namely greater foraging area per animal, leading to group enlargement and eventual inheritance of breeding space.

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“…Moreover, the support for the role of life history as a determinant of cooperative habits appears mixed (e.g. Arnold & Owens 1999, Ligon & Burt 2004, Doerr & Doerr 2006. Many apparent contradictions could potentially be resolved if the problem was tied back to the way how population structure and density emerge from patterns of individual breeding success and survival.…”

Section: Life Histories and Population-level Feedbackmentioning

confidence: 99%

Cooperative behaviour and cooperative breeding: What constitutes an explanation?

Kokko

2007

Behavioural Processes

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Comparative demography of treecreepers: evaluating hypotheses for the evolution and maintenance of cooperative breeding

Cited by 41 publications

References 24 publications

Sex-bias and timing of natal dispersal in cooperatively breeding Puff-throated Bulbuls Alophoixus pallidus

Sex-bias and timing of natal dispersal in cooperatively breeding Puff-throated Bulbuls Alophoixus pallidus

Ecological bases of philopatry and cooperation in Ethiopian wolves

Cooperative behaviour and cooperative breeding: What constitutes an explanation?

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