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Jolly, Alison; Caless, S.; Cavigelli, Sonia A.; Gould, Lisa; Pereira, Michael E.; Pitts, Angela; Pride, R. Ethan; Rabenandrasana, H. D.; Walker, John D.; Zafison, T.

doi:10.1023/a:1005467411880

Cited by 63 publications

(7 citation statements)

References 45 publications

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“…A pattern of breeding females routinely committing within-group infanticide has not been reported in other primates (Digby 2000; but see Jolly et al 2000;Pusey et al 2008), but is similar to findings in several other cooperative breeders (e.g. Elwood 1977;Vehrencamp 1977;Mumme et al 1983;Packer & Pusey 1984;Rasa 1987;Keeping 1992;Clutton-Brock et al 1998;Eggert & Muller 2000).…”

Section: (B) Infanticidesupporting

confidence: 81%

Reproductive skew in female common marmosets: what can proximate mechanisms tell us about ultimate causes?

2008

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Common marmosets are cooperatively breeding monkeys that exhibit high reproductive skew: most subordinate females fail to reproduce, while others attempt to breed but produce very few surviving infants. An extensive dataset on the mechanisms limiting reproduction in laboratory-housed and freeliving subordinate females provides unique insights into the causes of reproductive skew. Non-breeding adult females undergo suppression of ovulation and inhibition of sexual behaviour; however, they receive little or no aggression or mating interference by dominants and do not exhibit behavioural or physiological signs of stress. Breeding subordinate females receive comparable amounts of aggression to non-breeding females but are able to conceive, gestate and lactate normally. In groups containing two breeding females, however, both dominant and subordinate breeders kill one another's infants. These findings suggest that preconception reproductive suppression is not imposed on subordinate females by dominants, at a proximate level, but is instead self-imposed by most subordinates, consistent with restraint models of reproductive skew. In contrast to restraint models, however, this self-suppression probably evolved not in response to the threat of eviction by dominant females but in response to the threat of infanticide. Thus, reproductive skew in this species appears to be generated predominantly by subordinate self-restraint, in a proximate sense, but ultimately by dominant control over subordinates' reproductive attempts.

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Section: (B) Infanticidesupporting

confidence: 81%

Reproductive skew in female common marmosets: what can proximate mechanisms tell us about ultimate causes?

2008

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“…Additionally, intragroup female competition for access to resources increases during the nonbreeding season [39, 100]. During these social disputes, the killing of vulnerable infants, committed by both sexes, is a significant risk [19, 48, 53, 56, 60]. Signaling one’s health and vitality may reduce the likelihood of aggressive encounters that could lead to infanticide by competing females (reviewed in [116]).…”

Section: Discussionmentioning

confidence: 99%

Genetic variation at MHC class II loci influences both olfactory signals and scent discrimination in ring-tailed lemurs

et al. 2019

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Background Diversity at the Major Histocompatibility Complex (MHC) is critical to health and fitness, such that MHC genotype may predict an individual’s quality or compatibility as a competitor, ally, or mate. Moreover, because MHC products can influence the components of bodily secretions, an individual’s body odors may signal its MHC composition and influence partner identification or mate choice. Here, we investigated MHC-based signaling and recipient sensitivity by testing for odor-gene covariance and behavioral discrimination of MHC diversity and pairwise dissimilarity in a strepsirrhine primate, the ring-tailed lemur ( Lemur catta ). Methods First, we coupled genotyping of the MHC class II gene, DRB, with gas chromatography-mass spectrometry of genital gland secretions to investigate if functional genetic diversity is signaled by the chemical diversity of lemur scent secretions. We also assessed if the chemical similarity between individuals correlated with their MHC-DRB similarity. Next, we assessed if lemurs discriminated this chemically encoded, genetic information in opposite-sex conspecifics. Results We found that both sexes signaled overall MHC-DRB diversity and pairwise MHC-DRB similarity via genital secretions, but in a sex- and season-dependent manner. Additionally, the sexes discriminated absolute and relative MHC-DRB diversity in the genital odors of opposite-sex conspecifics, suggesting that lemur genital odors function to advertise genetic quality. Conclusions In summary, genital odors of ring-tailed lemurs provide honest information about an individual’s absolute and relative MHC quality. Complementing evidence in humans and Old World monkeys, we suggest that reliance on scent signals to communicate MHC quality may be important across the primate lineage. Electronic supplementary material The online version of this article (10.1186/s12862-019-1486-0) contains supplementary material, which is available to authorized users.

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“…However, where females fight for breeding status and the breeding lifespans of females are longer than those of males, the outcome of fights may have longer lasting effects on breeding success in females than males, and sex differences in the lifetime reproductive benefits of winning fights are likely to be smaller than sex differences in immediate reproductive benefits [28]. In addition, the cumulative costs associated with escalated fights may often be higher for females than for males, as they may incur fatal injuries that affect the survival of dependent offspring: for example, territorial fights among females frequently result in infant deaths in ringtailed lemurs [91]. Finally, where females are philopatric (as in many mammals), females may be able to control the development or the presence of potential rivals, so that escalated conflicts between individuals of approximately equal physical strength are less common than in males [42].…”

Section: (B) Fighting and Weaponrymentioning

confidence: 99%

Social competition and selection in males and females

Clutton‐Brock

Huchard

2013

Phil. Trans. R. Soc. B

310

218

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During the latter half of the last century, evidence of reproductive competition between males and male selection by females led to the development of a stereotypical view of sex differences that characterized males as competitive and aggressive, and females as passive and choosy, which is currently being revised. Here, we compare social competition and its consequences for selection in males and females and argue that similar selection processes operate in both sexes and that contrasts between the sexes are quantitative rather than qualitative. We suggest that classifications of selection based on distinction between the form of competition or the components of fitness that are involved introduce unnecessary complexities and that the most useful approach in understanding the evolution and distribution of differences and similarities between the sexes is to compare the operation of selection in males and females in different reproductive systems.

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Cited by 63 publications

References 45 publications

Reproductive skew in female common marmosets: what can proximate mechanisms tell us about ultimate causes?

Reproductive skew in female common marmosets: what can proximate mechanisms tell us about ultimate causes?

Genetic variation at MHC class II loci influences both olfactory signals and scent discrimination in ring-tailed lemurs

Social competition and selection in males and females

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