Tentativa de infanticídio por um macho dominante de Alouatta caraya (Humboldt) (Primates, Atelidae) em um infante extra-grupo devido a influência do observador

Aguiar, Lucas M.; Ludwig, Gabriela; Hilst, Carmen Lúcia Scortecci; Malanski, Luciano S.; Passos, Fernando C.

doi:10.1590/s0101-81752005000400056

Cited by 12 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Infanticide by howler males has been directly observed 17 times and was almost observed on three additional occasions when infants with severe and fresh wounds were seen close to a potentially infanticidal male (reviewed in Crockett 2003 ). Of these, seven cases were observed in A. seniculus Lozano 1991 , 1994 ;Kimura 1992 ;Izawa 1997 ;Palacios 2000 ), six in A. arctoidea (Rudran 1979 ;Agoramoorthy and Rudran 1995 ), four in A. pigra Van Belle et al 2010 ), two in A. caraya (Zunino et al 1985 ;Aguiar et al 2005 ), and one in A. palliata (Clarke 1983 ). Data on infanticide in howler monkeys is compatible with the sexual selection hypothesis (Hrdy 1979 ;Hausfater and Hrdy 1984 ) in that victims were seldom suspected to be related to their killers, almost all deaths led to early resumption of sexual activity by the victims' mothers, and infanticidal males were observed to copulate with these females and were often the most likely sire of the mother's next offspring (reviewed in Crockett 2003 ).…”

Section: Interbirth Interval Infanticide and Female Counterstrategiesmentioning

confidence: 76%

Howler Monkeys

Kowalewski

2015

View full text Add to dashboard Cite

Section: Interbirth Interval Infanticide and Female Counterstrategiesmentioning

confidence: 76%

Howler Monkeys

Kowalewski

2015

View full text Add to dashboard Cite

“…Another benefit is that the group may be better able to defend itself against infanticide caused by foreign males, providing greater reproductive success to groups with more males (Treves 2001;Chapman and Pavelka 2005). These possibilities may be very important here in Porto Rico, where both predation and infanticide have been observed (Aguiar et al 2005;Ludwig et al 2007). Thus, the combination of increased resource abundance, high densities, restricted dispersal and the potential for predation and infanticide avoidance may be important in permitting such large and multi-male groups in this region.…”

Section: Discussionmentioning

confidence: 99%

Group size and composition of black-and-gold howler monkeys (Alouatta caraya) on the Upper Paraná River, Southern Brazil

2008

Self Cite

View full text Add to dashboard Cite

In social mammals, group size, sex and age-class composition are important parameters that are required to understand population dynamics and determine conservation strategies. These parameters are known only poorly for the black-and-gold howler monkey (Alouatta caraya). Here, we studied groups of A. caraya on islands and adjacent banks of the Upper Paraná River of southern Brazil, to examine variability in group size and composition. This location is important for this species because of the high density of howlers. Group size was large, varying from 6 to 18 individuals (average = 11.5, standard deviation = 3.3, n = 13). Groups were multi-male, and adult females outnumbered adult males. On average, groups had the following ratios: 1 adult male: 0.5 subadult male: 1.9 adult females: 0.9 juveniles: 0.5 infants. The ratio of 0.2 infant: 1 adult female is less than that in other species, but typical of other studies of the black-and-gold howlers. Here, we discuss environmental and social pressures that may impose structure on large groups of howlers in terms of strategies for living in high densities. We also compare these data with those of the area of sympatry shared between A. caraya and A. clamitans, and suggest that competition may occur between the two species and that reduced fitness may be a consequence of mixed groups.

show abstract

“…Infanticide by howler males has been directly observed 17 times and was almost observed on three additional occasions when infants with severe and fresh wounds were seen close to a potentially infanticidal male (reviewed in Crockett 2003 ). Of these, seven cases were observed in A. seniculus (Izawa andLozano 1991 , 1994 ;Kimura 1992 ;Izawa 1997 ;Palacios 2000 ), six in A. arctoidea (Rudran 1979 ;Agoramoorthy and Rudran 1995 ), four in A. pigra (Knopff et al 2004 ;Van Belle et al 2010 ), two in A. caraya (Zunino et al 1985 ;Aguiar et al 2005 ), and one in A. palliata (Clarke 1983 ). Data on infanticide in howler monkeys is compatible with the sexual selection hypothesis (Hrdy 1979 ;Hausfater and Hrdy 1984 ) in that victims were seldom suspected to be related to their killers, almost all deaths led to early resumption of sexual activity by the victims' mothers, and infanticidal males were observed to copulate with these females and were often the most likely sire of the mother's next offspring (reviewed in Crockett 2003 ).…”

Section: Interbirth Interval Infanticide and Female Counterstrategiesmentioning

confidence: 99%

Insights into Reproductive Strategies and Sexual Selection in Howler Monkeys

Belle

Bicca‐Marques

2014

Howler Monkeys

View full text Add to dashboard Cite

The genus Alouatta is characterized by a fl exible social system in which the reproductive strategies of males and females show great variability both within and between species. Even though the mating system of some species is more frequently polygynous (e.g., A. arctoidea , A. seniculus, and A. pigra ) and that of other species more often polygynandrous (e.g., A. caraya and A. palliata ), females in all species whose reproductive behavior has been studied have been reported to copulate with multiple males within their group, with males in neighboring groups, and with solitary males, suggesting a "mixed mating strategy" characterized by periods of selective mating and periods of promiscuous mating. Central males, however, may be able to monopolize most breeding opportunities during the periovulatory period (POP) of the ovarian cycle when conception is most likely to occur by forming consortships with cycling females. Females do not avoid these consortships as they sexually solicit the central male frequently during their POPs. All howler monkey species are sexually dimorphic in body size, canine size, and hyoid apparatus, suggesting high male-male competition. In addition, four taxa present degrees of sexual dichromatism. Infanticide has been observed in various howler monkey species and might play an important role in shaping their social systems. We review the reproductive behavior of Alouatta , discuss male and female reproductive strategies that are associated with sexual selection via intrasexual selection, mate choice, or intersexual confl ict, and propose a model for the evolution of reproductive behavior in atelid primates.Resumen El género Alouatta se caracteriza por un sistema social fl exible en cual las estrategias reproductivas de los machos y las hembras muestran una gran vari-

show abstract

Tentativa de infanticídio por um macho dominante de Alouatta caraya (Humboldt) (Primates, Atelidae) em um infante extra-grupo devido a influência do observador

Cited by 12 publications

References 8 publications

Howler Monkeys

Howler Monkeys

Group size and composition of black-and-gold howler monkeys (Alouatta caraya) on the Upper Paraná River, Southern Brazil

Insights into Reproductive Strategies and Sexual Selection in Howler Monkeys

Contact Info

Product

Resources

About