Alternate Routes to Sociality in Jays—With a Theory for the Evolution of Altruism and Communal Breeding

Brown, Jerram L.

doi:10.1093/icb/14.1.63

Cited by 331 publications

(167 citation statements)

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“…Inbreeding can reduce the reproductive success of the inbreeding pair in many ways, most often by increased foetal or offspring mortality (Ralls et al 1979;Senner 1980), and it is clear that in principle such reductions in reproductive success should be powerful selective forces against inbreeding. However, the increased homozygosity that results from inbreeding also means that inbred siblings are more closely related than are outbred ones, and hence more able to benefit from kin selection: inbreeding can be seen as a potentially beneficial phenomenon that promotes increased altruism and sociality (Brown 1974;Seger 1976;Wade 1979;Hughes 1980;Michod 1980;Breden & Wade 1981). Such altruism may resemble what is usually called inbreeding depression: Seger (1976Seger ( , 1980has pointed out that in a viscous population high levels of individual homozygosity will be correlated with a high probability of being surrounded by relatives; under such circumstances competitive restraint (manifested as competitive incompetence) would be favoured by kin selection.…”

Section: Inbreeding Depression Inbreeding Costs and Benefitsmentioning

confidence: 99%

“…Finally, when the risks of migration or the benefits of keeping limited resources (e.g. territory, political power) within the kin group are especially high, the costs of inbreeding may be outweighed by the benefits of philopatry (Brown 1974;Bengtsson 1978;May 1979;Smith 1979;Hughes 1980;Emlen 1982; see Kloss's gibbon, Hylobates klossi, example below; for a possible exception see Koenig & Pitelka 1979;Koenig 1981).…”

Section: Kin Recognitionmentioning

confidence: 99%

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Are dispersal and inbreeding avoidance related?

1984

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Abstract. Sex differences in dispersal and inter-group transfer by birds and mammals are often considered to be evolved responses to the phenomenon of inbreeding depression. This belief is derived from 'natural selection logic', which holds that (1) because inbreeding depression is demonstrably costly, selection must have acted to minimize its occurrence, and (2) as sex differences in dispersal often appear to be the only thing preventing inbreeding, these sex differences must be the expected adaptations for avoiding inbreeding depression. However, although the sex differences in median dispersal distance observed among many small mammals and birds may reduce average levels of inbreeding within a population, they nevertheless leave the majority of individuals 'at risk' for inbreeding; such differences can be responses to inbreeding depression only in a group selection model. Furthermore, natal dispersal by both sexes occurs in many group-living species. In these species, emigration by individuals of one sex cannot easily be attributed to avoiding inbreeding because opposite-sex relatives also emigrate. Though most authors acknowledge that sexual dispersal patterns may be epiphenomenal consequences of other factors (e.g. intrasexual aggression), this point is rarely considered further. In this paper we critically review several frequently cited examples of differential dispersal, and conclude that 'other factors', such as intrasexual competition and territory choice, explain these observations more completely and consistently than does the inbreeding avoidance hypothesis. Observed dispersal patterns simply reflect sex differences in the balance between the advantages of philopatry and the costs of intrasexual competition.

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Section: Inbreeding Depression Inbreeding Costs and Benefitsmentioning

confidence: 99%

Section: Kin Recognitionmentioning

confidence: 99%

Are dispersal and inbreeding avoidance related?

1984

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“…The group has long been a focus of research in behavioral ecology, in light of complex behavioral repertoires, particularly as regards social behavior [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Reconstructing the geographic origin of the New World jays

Fernando

Peterson

2017

Neotropical Biodiversity

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We conducted a biogeographic analysis based on a dense phylogenetic hypothesis for the early branches of corvids, to assess geographic origin of the New World jay (NWJ) clade. We produced a multilocus phylogeny from sequences of three nuclear introns and three mitochondrial genes and included at least one species from each NWJ genus and 29 species representing the rest of the five corvid subfamilies in the analysis. We used the S-DIVA, S-DEC, and BBM analyses implemented in RASP to create biogeographic reconstructions, and BEAST to estimate timing of NWJ diversification. Biogeographic reconstructions indicated that NWJs originated from an ancestor in the Eastern Palearctic or Eastern + Western Palearctic, diversified in Mesoamerica and spread subsequently to North and South America; the group has been diversifying in the New World since the late Miocene.Keywords: New World jays; Corvidae; biogeographic origin; divergence times IntroductionThe New World jays (NWJs) are a monophyletic group of corvids [1,2], presently considered to comprise seven genera (Aphelocoma, Calocitta, Cyanocitta, Cyanocorax, Cyanolyca, Gymnorhinus and Psilorhinus); the~36 species [3,4] represent the product of a radiation across much of the Americas [1]. The group has long been a focus of research in behavioral ecology, in light of complex behavioral repertoires, particularly as regards social behavior [5][6][7].The origins of corvids can be traced to Australia, from where the ancestor of the family dispersed to Asia, followed by radiations in Asia, Europe and elsewhere [8]. Ericson and colleagues [9][10][11] provided evidence that the origin of the oscine passerines, to which the Corvidae belongs, dates to the split of the AustraloPapuan tectonic plate from Antarctica in the early Tertiary,~53M years ago. Thus, the replacement of the early Tertiary rainforests in Australia by drier vegetation may have placed presumably forest-adapted early corvids in more open habitats, resulting in a new radiation that led to the present global distribution of the family. However, a recent study [12] estimated the age of the family at~20M years. Colonization of the New World by corvids occurred more recently, apparently via a transBeringian route [8]. The ancestor of NWJs, thought to be jay-like lineages related to Cissa and Urocissa, reached North America 10−8M years ago, in the Miocene [13]. Once in the Americas, a rapid radiation in South America by the early Pliocene, was apparently followed by a secondary radiation in These previous studies, however, did not provide sufficient detail in terms of representation of taxa of NWJs and other corvids to permit thorough understanding the geographic origin of NWJs or to identify their closest corvid relatives. The key deficiency has been in terms of representation of taxa from the deepest branches of the corvid phylogeny; thus, we here derive a denser phylogenetic hypothesis by deriving DNA sequences for Neotropical Biodiversity, 2017 Vol. 3, No. 1, 80-92, https://doi.org/10.1080/23766808.2017 Published on...

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“…De plus, les mouvements extraterritoriaux peuvent fournir des opportunités clandestines pour la reproduction, lesquelles ont le potentiel d'infl uencer profondément la distribution du fi tness parmi les martins-chasseurs dominants et les aides au nid. Selander 1964, Brown 1974, Gaston 1978, Stacey 1979, Koenig and Pitelka 1981. In pair-breeding species, investigators have identifi ed spatially and temporally variable factors that infl uence the distribution of individuals, including environmental conditions, intraspecifi c interactions (Brown 1964, Emlen and Oring 1977, Hixon 1980, Schoener 1983, Lima 1984, Stamps and Krishnan 1999, and resource dispersion and predictability (Brown 1964, Emlen and Oring 1977, Bollmann et al 1997, Clark and Shutler 1999, Zwicker and Walters 1999, Tyre et al 2001).…”

Section: Territorialité Prospection Et Dispersion Chez Des Todiramphmentioning

confidence: 99%