1977
DOI: 10.1007/bf00299284
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Social organization and foraging in emballonurid bats

J. W. Bradbury,
S. L. Vehrencamp

Abstract: 1. A general model of mating system evolution in mammals is developed, which takes into account the different male strategies of resource defense, female group defense, and male mating aggregations. The critical environmental variables determining differential defensibility of females and resources are identified by generalizing the resource defense model of Orians (1969). The model is then applied to available data on African antelopes (Jarman, 1974) to establish a set of hypothetical relations between certai… Show more

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Cited by 246 publications
(49 citation statements)
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“…food and nest sites) and risks (e.g. predation, disease and infanticide) determine the spatio-temporal distribution of receptive females, which in turn affects the strategies available to males [8][9][10]15,22,23]. If resources are spatially dispersed, females may, depending on risks, live spatially isolated from other females.…”
Section: Ecology Social Organization and Mating Systems (A) Basic Idmentioning
confidence: 99%
See 1 more Smart Citation
“…food and nest sites) and risks (e.g. predation, disease and infanticide) determine the spatio-temporal distribution of receptive females, which in turn affects the strategies available to males [8][9][10]15,22,23]. If resources are spatially dispersed, females may, depending on risks, live spatially isolated from other females.…”
Section: Ecology Social Organization and Mating Systems (A) Basic Idmentioning
confidence: 99%
“…Here, the monopolization potential will depend not only on the number of females, but also on the degree of spatial cohesion and/or temporal overlap in their receptive periods ( [15,25]; for more details, see [10,22]). In contrast to other mammals [8,9,26], in which ecological factors have been linked to grouping patterns and mating systems, studies of non-human primates have focused less on the environmental factors that underpin variation in mating systems (but see [27,28]). Rather they have examined the emergence of fission -fusion sociality [29,30] or constraints of group size, generally focusing on how predation avoidance and scramble competition for food set adaptive limits for minimum and maximum group size, respectively [31][32][33][34][35].…”
Section: Ecology Social Organization and Mating Systems (A) Basic Idmentioning
confidence: 99%
“…The sac-winged bat is a neotropical species with harem-like social structures (Bradbury and Emmons 1974;Bradbury and Vehrencamp 1976). The mating system of S. bilineata can be described as a resource-defense polygyny (Emlen and Oring 1977).…”
Section: Introductionmentioning
confidence: 99%
“…Birth is highly synchronized within harems and is timed to the onset of the rainy season when food abundance is highest (Tannenbaum 1975;Bradbury and Vehrencamp 1976). Pups are able to fly at 2-3 weeks of age but are nursed for another 8 weeks.…”
Section: Introductionmentioning
confidence: 99%
“…The most popular answer to this second question is that females go to leks to gain access to high-quality mating partners, either because clusters of male territories enable females accurately to compare between mates or because only very competitive males are able to defend territories in clusters (Alexander 1975;Bradbury and Vehrencamp 1977;Borgia 1979;Bradbury 1981;Bradbury and Gibson 1983;Gibson et al 1991).…”
Section: Introductionmentioning
confidence: 99%