The external and visceral anatomy of the Olive Colobus Monkey <i>(Procolobus verus)</i>

Hill, F.R.S.E. W. C. Osman

doi:10.1111/j.1469-7998.1952.tb06315.x

Cited by 39 publications

(11 citation statements)

References 14 publications

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“…We found that male mating competition was characterized by mating competition within groups, resulting in a strong mating bias (current study) [Oates, 1994] and competition between groups. In addition, the relatively large testes (Oates, personal communication) [Hill, 1952], coagulating sperm, and frequent copulations within 1 day by the same males (current study) [Oates, 1994] observed are indicators of sperm competition [Birkhead & Mller, 1998]. Since direct competition appeared to be relatively effective within groups, the adaptation to sperm competition may be a strategy to counter extragroup mating by females.…”

Section: Discussionmentioning

confidence: 74%

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Mating system of an exceptional primate, the olive colobus (Procolobus verus)

Korstjens

Noë²

2004

American J Primatol

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In the olive colobus (Procolobus verus), many groups have multiple males and the males have large testes. This indicates that even though this species lives in small groups, single males do not monopolize the groups. We investigated the strategies employed by males to secure their mating success, and sought to determine whether the lack of male monopolization was a result of female mating strategies, as indicated by the exaggerated sexual swellings of the females. Four study groups were monitored for demographic changes, and group composition was determined in six additional groups in Taï National Park, Ivory Coast, between 1994 and 1999. Social behavior was recorded by scan and focal sampling in the study groups. The almost permanent association of olive colobus with Diana monkeys (Cercopithecus diana) in effect provided males a resource at which they could expect females to visit and sometimes even permanently join them, as well as protection from predators. As alternative strategies for obtaining females, one male took over the group of another male and one male immigrated into a bisexual group. Within bi-male groups, dominant males mated most frequently and males defended their groups during intergroup interactions. Lone females that visited groups or solitary males had a swelling more often than expected, and generally mated with the males they visited. Females had long receptive periods, several consecutive receptive cycles, and some overlap in receptive periods within groups. Females mated with extragroup males, and during infertile periods. We concluded that the males used the Diana monkeys for safety reasons and to obtain mating partners, and that female reproductive biology and behavior prevented the monopolization of groups of females by single males. Our data were inconclusive as regards the benefits to females of avoiding monopolization by males.

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Section: Discussionmentioning

confidence: 74%

“…Another striking aspect of the olive colobus is the occurrence of large sexual swellings in females [Hill, 1952]. Such swellings can counter male strategies to monopolize females, and they are commonly observed in species that live in much larger groups compared to those of the olive colobus [Sillén-Tullenberg & Mller, 1993].…”

Section: Introductionmentioning

confidence: 99%

Mating system of an exceptional primate, the olive colobus (Procolobus verus)

Korstjens

Noë²

2004

American J Primatol

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“…Comparative morphological investigations have focused individually on the larynx, pharynx, mouth and nasal fossa of non-human primates (Brandes, 1931;Cave, 1967;Doyle et al, 1990;Fli.igel and Rohen, 1991;Geist, 1933;Hill, 1952Hill, , 1953Hill and Booth, 1957;Hilloowala, 1975;Huber, 1931, Jordan, 1971Kelemen, 1948Kelemen, , 1969Kelemen and Sade, 1960;Lampert, 1926;Laitman et al, 1977;Negus, 1962;Nemai, 1926;Schneider, 1958;Schon, 1964Schon, , 1970Schon, , 1971Starck and Schneider, 1960). Most ofthese investigations have served primarily to clarity systematic relations.…”

Section: State Of the Artmentioning

confidence: 98%

A Comparative Approach to the Non-Human Primate Vocal Tract: Implications for Sound Production

Ybarra

1995

Current Topics in Primate Vocal Communication

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“…The species-groups listed in Table 1, which shows the distribution of group, correspond exactly to the 'species' of G. M. Allen (1939) Hill (1952), and under the petaurista-group are three species: are placed in separate groups. C. petaurista (including C. p. bilttikoferi) , C.…”

Section: Methodsmentioning

confidence: 99%

The Niger, the Volta and the Dahomey Gap as Geographic Barriers

Booth

1958

Evolution

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The external and visceral anatomy of the Olive Colobus Monkey (Procolobus verus)

Cited by 39 publications

References 14 publications

Mating system of an exceptional primate, the olive colobus (Procolobus verus)

Mating system of an exceptional primate, the olive colobus (Procolobus verus)

A Comparative Approach to the Non-Human Primate Vocal Tract: Implications for Sound Production

The Niger, the Volta and the Dahomey Gap as Geographic Barriers

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