Intra‐community infanticide and forced copulation in spider monkeys: a multi‐site comparison between Cocha Cashu, Peru and Punta Laguna, Mexico

Gibson, K. Nicole; Vick, Laura G.; Palma, Ana Cristina; Carrasco, Farah; Taub, D.; Ramos‐Fernández, Gabriel

doi:10.1002/ajp.20511

Cited by 23 publications

(22 citation statements)

References 19 publications

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“…In the atelines, one important benefit appears to be in cooperative defense from extra group males that are potential competitors for receptive females. Invading males may also be infanticidal [Garber & Kowelewski, 2009;Gibson et al, 2008]. The cost of male-male tolerance is lower when males are kin, and for this reason Garber and Kowelewski [2009] predict that dispersal in Chiropotes and Cacajao is female biased.…”

Section: Kinship Cooperation and Sex In Large Fission-fusion Groupsmentioning

confidence: 99%

Social behavior in fission–fusion groups of red uakari monkeys (Cacajao calvus ucayalii)

Bowler

Bodmer

2009

American J Primatol

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Primates living in large groups that divide to forage must have social systems compatible with this mode of living. Uakari monkeys (Cacajao spp.) live in large groups and exhibit a form of fission-fusion grouping, but their social organization is poorly understood. We present some of the first data on social behavior for this genus based on a study on Cacajao calvus ucayalii. They traveled in multimale multifemale groups of highly variable sizes, with bachelor units on the periphery. Adult males were affiliative, and adult females associated with more than one adult male. Adult females typically traveled with their dependent offspring and an older juvenile within the group. In parties of two or more males, individuals engaged in previously unreported display behaviors and acted together to aggressively chase other males. Breeding was seasonal, and mating occurred away from other group members. We speculate on the social organization of C. calvus ucayalii, in which dispersal may be bisexual and peripheral males are affiliative with one another. Affiliated males appear to cooperate in fighting and displaying to other males for access to females during the breeding season.

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Section: Kinship Cooperation and Sex In Large Fission-fusion Groupsmentioning

confidence: 99%

Social behavior in fission–fusion groups of red uakari monkeys (Cacajao calvus ucayalii)

Bowler

Bodmer

2009

American J Primatol

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“…Nearly all of the sightings of subgroups of two individuals in the risky boundary areas (83%) were of consorting male and female pairs. Spider monkeys routinely take part in consortships in which males and females may spend several days together while mating, separate from other individuals [Gibson et al, 2008]. This suggests that aside from subgroups that consist of a consorting pair, subgroup sizes of five individuals or above are most common in risky boundary areas.…”

Section: Use Of Boundary Areasmentioning

confidence: 99%

Male and female range use in a group of white‐bellied spider monkeys (Ateles belzebuth) in Yasuní National Park, Ecuador

Spehar

Link

Fiore

2009

American J Primatol

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Spider monkeys (Ateles sp.) live in a flexible fission-fusion social system in which members of a social group are not in constant association, but instead form smaller subgroups of varying size and composition. Patterns of range use in spider monkeys have been described as sex-segregated, with males and females often ranging separately, females utilizing core areas that encompass only a fraction of the entire community range, and males using much larger portions of the community range that overlap considerably with the core areas of females and other males. Males are also reported to use the boundary areas of community home ranges more often than females. Spider monkeys thus seem to parallel the "male-bonded" patterns of ranging and association found among some groups of chimpanzees. Over several years of research on one group of spider monkeys (Ateles belzebuth) in Yasuní National Park, Ecuador, we characterized the ranging patterns of adult males and females and evaluated the extent to which they conform to previously reported patterns. In contrast to ranging patterns seen at several other spider monkey sites, the ranges of our study females overlapped considerably, with little evidence of exclusive use of particular areas by individual monkeys. Average male and female home range size was comparable, and males and females were similar in their use of boundary areas. These ranging patterns are similar to those of "bisexually bonded" groups of chimpanzees in West Africa. We suggest that the less sex-segregated ranging patterns seen in this particular group of spider monkeys may be owing to a history of human disturbance in the area and to lower genetic relatedness between males, highlighting the potential for flexibility some aspects of the spider monkeys' fission-fusion social system.

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“…Adult males within a spider monkey group collectively defend reproductive access to a group's females against extragroup males. Nonetheless, out of five confirmed or suspected cases of intragroup infanticide that have been witnessed in studies of wild spider monkeys, all have been directed towards unweaned male infants (Gibson et al 2008;Shimooka et al 2008;Vick 2008).…”

Section: Introductionmentioning

confidence: 99%

Male-directed infanticide in spider monkeys (Ateles spp.)

et al. 2014

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Infanticide is considered a conspicuous expression of sexual conflict amongst mammals, including at least 35 primate species. Here we describe two suspected and one attempted case of intragroup infanticide in spider monkeys that augment five prior cases of observed or suspected infanticide in this genus. Contrary to the typical pattern of infanticide seen in most primate societies, where infants are killed by conspecifics independent of their sex, all eight cases of observed or suspected infanticide in spider monkeys have been directed toward male infants within their first weeks of life. Moreover, although data are still scant, infanticides seem to be perpetrated exclusively by adult males against infants from their own social groups and are not associated with male takeovers or a sudden rise in male dominance rank. Although the slow reproductive cycles of spider monkeys might favor the presence of infanticide because of the potential to shorten females' interbirth intervals, infanticide is nonetheless uncommon among spider monkeys, and patterns of male-directed infanticide are not yet understood. We suggest that given the potentially close genetic relationships among adult males within spider monkey groups, and the need for males to cooperate with one another in territorial interactions with other groups of related males, infanticide may be expected to occur primarily where the level of intragroup competition among males outweighs that of competition between social groups. Finally, we suggest that infanticide in spider monkeys may be more prevalent than previously thought, given that it may be difficult for observers to witness cases of infanticide or suspected infanticide that occur soon after birth in taxa that are characterized by high levels of fission-fusion dynamics. Early, undetected, male-biased infanticide could influence the composition of spider monkey groups and contribute to the female-biased adult sex ratios often reported for this genus.

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Intra‐community infanticide and forced copulation in spider monkeys: a multi‐site comparison between Cocha Cashu, Peru and Punta Laguna, Mexico

Cited by 23 publications

References 19 publications

Social behavior in fission–fusion groups of red uakari monkeys (Cacajao calvus ucayalii)

Social behavior in fission–fusion groups of red uakari monkeys (Cacajao calvus ucayalii)

Male and female range use in a group of white‐bellied spider monkeys (Ateles belzebuth) in Yasuní National Park, Ecuador

Male-directed infanticide in spider monkeys (Ateles spp.)

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