Habitat and the evolution of social and reproductive behavior in callitrichidae

Rylands, Anthony B.

doi:10.1002/(sici)1098-2345(1996)38:1<5::aid-ajp2>3.0.co;2-2

Cited by 114 publications

(51 citation statements)

References 46 publications

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“…We also found that testicular volume in adult common marmosets varies significantly according to their social status within the group. Our laboratory records and those of other researchers showing that callitrichids do not exhibit linear hierarchy (Araújo 1996;Rylands 1996;Stevenson and Rylands 1988;Sussman and Röthe 1975;Röthe and Darms 1993), suggest that the increase might be related to the role of reproductive males in the social group. Dominant males assume a leadership position during intergroup encounters and, consequently, are more exposed to conflict and aggressive interactions with other individuals.…”

Section: Discussionsupporting

confidence: 78%

Testicular Volume and Reproductive Status of Wild Callithrix jacchus

Araújo

Sousa

2008

Int J Primatol

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The social relationship dynamic among callitrichid females is well known. Breeding exclusivity by dominant females involves female-female competition, usually resulting in the inhibition of subordinate reproduction. However, the strategies to maintain the male breeding position are still unclear. Researchers have observed no overt aggression between males, and differences in testosterone levels between dominant and subordinate individuals do not correlate with differences in reproductive success. In Callithrix monogamy is the predominant mating system, and testicular size is compatible with the absence of sperm competition. We analyzed testicular volume during development in 95 individuals at different ages (infant n= 12, juvenile n=9, subadult n=15, and adult n=59). We also investigated if the ratio between testicular volume and body mass correlates with breeding position in the social group. The ratio was significantly higher in breeding males and a positive correlation between body mass and testicular volume is significant only for nonbreeding males. The findings suggest that testicular size varies with male reproductive status in the social group and that the enlargement of testicular volume in breeding common marmoset males seems to be a result of proximate causes and to depend on social and reproductive contexts acting together or separately.

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Section: Discussionsupporting

confidence: 78%

Testicular Volume and Reproductive Status of Wild Callithrix jacchus

Araújo

Sousa

2008

Int J Primatol

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“…It has been suggested that infant carrying might be a courtship strategy in the wild where groups are not necessarily closed families (Ferrari 1992;Price 1990;Rylands 1996). However, the rationale for this is somewhat tenuous and various predictions of this hypothesis were not supported by subsequent analysis (Tardif and Bales 1997).…”

Section: Discussionmentioning

confidence: 99%

Analysis of infant carrying in large, well-established family groups of captive marmosets (Callithrix jacchus)

et al. 2004

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To assess the pattern of infant carrying across time and family members, we counted which animals in 13 well-established family groups of captive-bred marmosets (Callithrix jacchus) carried neonates during the first 8 weeks of life. The neonates were carried almost continuously for the first 3 weeks and then spent progressively more time independently. The mother did most of the carrying for the first 2 weeks, her contribution rising from day 1 to day 3 and declining thereafter. The contribution of the father was high on day 1, declined during the first week, and then rose to a peak in the fourth week. The contribution of the siblings rose sharply during the first week and declined thereafter. There was no overall difference in amount of infant carrying by each parent. The contribution of each sibling was small although in these large families the total contribution by siblings was large. These data may differ from previous observations because the breeding pairs were very well established, the families were large, and all except the youngest animals were very experienced in rearing and carrying. These data emphasise the group-dynamic nature of infant carrying in a primate species.

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“…The presence of mixed groups of the exotic species C. jacchus and C. penicillata is a potential threat to the local fauna and flora where they were introduced, since these species can act as predators of small vertebrates and invertebrates, besides damaging tree trunks and woody vines to feed on exudates (CoimbraFilho 1972;Silva and Cruz 1993;Rylands 1996;Digby and Barreto 1998;Castro et al 2000;Castro 2003). Another impact that can be caused by these exotic primates is the hybridization with other species of the genus, such as Callithrix aurita (É. Geoffroy, 1812) (Coimbra-Filho 1971;Coimbra-Filho et al 1993).…”

Section: ----------------mentioning

confidence: 99%

Non-volant mammals, Reserva Particular do Patrimônio Natural (RPPN) Rio das Pedras, municipality of Mangaratiba, state of Rio de Janeiro, Brazil

Pessôa¹,

Modesto²,

Albuquerque³

et al. 2009

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The Atlantic Forest is recognized as a global hotspot for having one of the highest rates of endemism and biodiversity. Its portion in the state of Rio de Janeiro is extremely fragmented and reduced. The present study seeks to get information on the non-volant mammals of RPPN Rio das Pedras in municipality of Mangaratiba, state of Rio de Janeiro. The rapid mammal's survey was accomplished by the use of pitfalls, live traps, transects and camera traps. We recorded 23 non-volant species that represent 13

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Habitat and the evolution of social and reproductive behavior in callitrichidae

Cited by 114 publications

References 46 publications

Testicular Volume and Reproductive Status of Wild Callithrix jacchus

Testicular Volume and Reproductive Status of Wild Callithrix jacchus

Analysis of infant carrying in large, well-established family groups of captive marmosets (Callithrix jacchus)

Non-volant mammals, Reserva Particular do Patrimônio Natural (RPPN) Rio das Pedras, municipality of Mangaratiba, state of Rio de Janeiro, Brazil

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