Inter-group Encounters and Male Incursions In Colobus Vellerosus in Central Ghana

Sicotte, Pascale; MacIntosh, Andrew J. J.

doi:10.1163/1568539041166717

Cited by 71 publications

(96 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Between-group encounters are usually aggressive in this species, with adult males as the main participants (Sicotte & MacIntosh, 2004). Group males, solitary males, and males in all-male bands also attack bisexual groups during male incursions (Sicotte & MacIntosh, 2004;Teichroeb et al, 2011). Targeted aggression towards infants occurs during between-group encounters and male incursions (Sicotte & MacIntosh, 2004;.…”

Section: Study Speciesmentioning

confidence: 99%

“…When a group's male(s) is weakening or aging, new males immigrate and may take over the alpha male position, sometimes leading to a period of instability with female emigrations and infanticides (Teichroeb & Sicotte, 2008;Teichroeb et al, 2009Teichroeb et al, , 2011Teichroeb et al, , 2012. Between-group encounters are usually aggressive in this species, with adult males as the main participants (Sicotte & MacIntosh, 2004). Group males, solitary males, and males in all-male bands also attack bisexual groups during male incursions (Sicotte & MacIntosh, 2004;Teichroeb et al, 2011).…”

Section: Study Speciesmentioning

confidence: 99%

See 1 more Smart Citation

Factors influencing male affiliation and coalitions in a species with male dispersal and intense male–male competition, Colobus vellerosus

Teichroeb

Wikberg

Ting

et al. 2014

Behav

Self Cite

View full text Add to dashboard Cite

Male Colobus vellerosus compete intensely for access to females, which sometimes leads to mortal wounding. Yet, males often form cooperative relationships to overtake prime-aged males and immigrate into bisexual groups. We investigated the factors that predicted the presence of coalitions and affiliative relationships among males in this species. Interactions among males in 292 dyads from six groups were examined from 2004 to 2010 at Boabeng-Fiema, Ghana. Affiliation rates among males were higher and aggression rates lower when one or both males in the dyad were subadult, compared to adult male dyads. Affiliation rates tended to be higher among males that were kin but no other aspect of male relationships predicted affiliation. Coalitions among males were rarely observed and primarily occurred in the context of joint defense against extra-group males (93.5% of events). Adult males were more likely to provide coalitionary support than subadults and coalitions occurred significantly more often when both males were high ranking, since these males probably benefited most in terms of reproductive success from excluding extra-group males. Rank-changing and leveling coalitions among low-ranking males appear to be quite rare or absent in C. vellerosus. The costs of these types of coalitions may be too high or male group size too small on average for these types of coalitions to have been selected for. The overall low rates of affiliation and coalitions among male C. vellerosus are likely influenced by male-biased dispersal and the high level of male-male competition.

show abstract

Section: Study Speciesmentioning

confidence: 99%

Section: Study Speciesmentioning

confidence: 99%

Factors influencing male affiliation and coalitions in a species with male dispersal and intense male–male competition, Colobus vellerosus

Teichroeb

Wikberg

Ting

et al. 2014

Behav

Self Cite

View full text Add to dashboard Cite

show abstract

“…There is no mating or birth season (Teichroeb & Sicotte, 2008b), and females show no external signs of ovulation. Between-group encounters (BGEs) are usually aggressive, with adult males as the main participants, but a small percentage of encounters involve no aggression (17%, Sicotte & MacIntosh, 2004). Group males, solitary males, and males in AMBs also attack and interact with bisexual groups during male incursions (Sicotte & MacIntosh, 2004).…”

Section: Study Site and Speciesmentioning

confidence: 99%

“…Before leaving their resident group, males may assess other groups for dispersal opportunities. They can evaluate other groups during betweengroup encounters (BGEs, e.g., Steenbeek, 1999;Sicotte & MacIntosh, 2004) or they can use male incursions (sometimes called forays) to 'visit' or 'sample' a group before immigrating. These incursions involve males leaving their resident group, approaching, and sometimes integrating into other groups.…”

Section: Introductionmentioning

confidence: 99%

“…These incursions involve males leaving their resident group, approaching, and sometimes integrating into other groups. Male incursions allow assessment of neighbouring groups for dispersal or breeding opportunities (e.g., mammals: Otaria byronia, Campagna et al, 1988; Suricata suricatta, Doolan & Macdonald, 1996;Young et al, 2007;Chlorocebus aethiops, Cheney & Seyfarth, 1983; Colobus vellerosus, Sicotte & MacIntosh, 2004;C. polykomos, Korstjens et al, 2005; birds: reviewed in Westneat & Stewart, 2003).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dispersal in male ursine colobus monkeys (Colobus vellerosus): influence of age, rank and contact with other groups on dispersal decisions

Teichroeb

Wikberg

Sicotte

2011

Behav

Self Cite

View full text Add to dashboard Cite

SummaryDispersal is male-biased in ursine colobus monkeys (Colobus vellerosus), although female dispersal also occurs (Teichroeb et al., 2009). Here we describe the process of male dispersal and its connection with between-group encounters (BGEs, N = 444) and male incursions (when males left their group and approached within 50 m of another group; N = 128) at the Boabeng-Fiema Monkey Sanctuary in central Ghana. Through BGEs and incursions, particularly those with non-aggressive interactions between individuals in different groups (BGEs, N = 17; incursions, N = 4), males could probably assess other groups for dispersal opportunities. There was a trend for males to perform incursions more frequently before emigrating voluntarily than involuntarily. Incursions were often performed towards the group that the male eventually transferred to. Incursions by alpha males were temporally shorter and more aggressive than those by non-alpha males. We suggest that non-alpha males used incursions to assess other groups for breeding or dispersal opportunities, whereas alpha males performed incursions mainly to convey information about their quality to neighbouring males and females. Male emigrations/disappearances (natal N = 20, secondary N = 43, unknown N = 9) and immigrations (N = 62) were recorded for seven groups during ten years (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010). Alpha males always emigrated involuntarily. Parallel emigration and immigration occurred. Males often immigrated into groups with a more favourable adult male/adult female ratio and improved their rank, both of which likely increased their mating opportunities. The most fitting ultimate explanation for both natal and secondary male dispersal in this population was the intrasexual competition for mates hypothesis, as males of all ages appeared to emigrate to improve their reproductive opportunities.

show abstract

Individuals' behaviors following dye-marking in wild black-and-white colobus (Colobus vellerosus)

2005

Self Cite

View full text Add to dashboard Cite

The ability to recognize individuals is a prerequisite for analyzing social relationships. We marked five adult and subadult Colobus vellerosus (three in 2002, and two in 2003) at the Boabeng Fiema Monkey Sanctuary, Ghana, to assess the feasibility of dye-marking black-and-white colobus, describe their reactions, and compare some of their behaviors with those of unmarked individuals. We used Nyanzol-D, a nontoxic black dye sprayed on the white tail (or white thigh) of the animal with a spray gun or a tree sprayer. Reactions to the marking procedure ranged from moving away and staring at the observer, without interruption in feeding (in one subject), to fleeing about 5 m away (in four subjects). In 234 hr of ad libitum observations (in 2002 and 2003), marks were scratched or otherwise were the object of attention from the bearer or other individuals on only one occasion. In 2002 we collected 22 hr of observations on the three marked monkeys and some unmarked monkeys in 10-min focal samples. Neither the marked nor the unmarked animals attended to the marks during focal samples. Marked and unmarked individuals displayed similar rates of displacement activities (autogrooming, scratching, and yawning). The proportion of scans with at least one near neighbor varied between marked and unmarked subjects, but the direction of the difference was not the same between males and females. The only aggression observed was displacements, and only in one comparison (out of four) did a difference emerge: the marked subadult male received more displacements than the unmarked males. Overall, marked and unmarked individuals did not differ consistently in our measures. Examination of the potential effects of marking should continue, since changes in pelage coloration may have longer-term social effects in species that rely largely on vision.

show abstract

Inter-group Encounters and Male Incursions In Colobus Vellerosus in Central Ghana

Cited by 71 publications

References 35 publications

Factors influencing male affiliation and coalitions in a species with male dispersal and intense male–male competition, Colobus vellerosus

Factors influencing male affiliation and coalitions in a species with male dispersal and intense male–male competition, Colobus vellerosus

Dispersal in male ursine colobus monkeys (Colobus vellerosus): influence of age, rank and contact with other groups on dispersal decisions

Individuals' behaviors following dye-marking in wild black-and-white colobus (Colobus vellerosus)

Contact Info

Product

Resources

About