Intergroup Encounters among Free-Ranging Vervet Monkeys

1981 ◽  
Vol 35 (2-3) ◽  
pp. 124-146 ◽  
Author(s):  
D.L. Cheney
Keyword(s):  
Vervet Monkeys ◽  
Intergroup Encounters ◽  
Free Ranging

Pregnancy outcome in free-ranging vervet monkeys (Cercopithecus aethiops)

1987 ◽  
Vol 12 (2) ◽  
pp. 197-203 ◽  
Author(s):  
T. R. Turner ◽  
P. L. Whitten ◽  
C. J. Jolly ◽  
J. G. Else
Keyword(s):  
Pregnancy Outcome ◽  
Cercopithecus Aethiops ◽  
Vervet Monkeys ◽  
Free Ranging

scholarly journals Variation in intergroup encounters among two provisioned free-ranging populations of Japanese macaques Macaca fuscata

2012 ◽  
Vol 58 (4) ◽  
pp. 517-524 ◽  
Author(s):  
Peng Zhang ◽  
Kunio Watanabe
Keyword(s):  
Social Factors ◽  
Intergroup Relations ◽  
Macaca Fuscata ◽  
Japanese Macaque ◽  
Japanese Macaques ◽  
Intergroup Relationships ◽  
Specific Variation ◽  
Intergroup Encounters ◽  
Free Ranging

Abstract Typically, Japanese macaques are thought to avoid encountering other groups wherever possible. Intergroup relations between macaques on Shodoshima Island, however, appear exceptional. We show that neighboring groups of Shodoshima monkeys spent 32.8% of their active time in proximity to (<100 m) and even foraged simultaneously at the same provisioning site with another group. The average duration and rate of intergroup encounters at Shodoshima (59.8 min, 0.33 times/hour, n=269) were approximately ten times longer and 16.5 times more frequent than those at Jigokudani (6.1 min, 0.02 times/hour, n=14). Since both populations have similar provisioning and ecological conditions, such variation cannot be explained by the socioecology model alone. Compared with other populations of Japanese macaques, intergroup relations of Shodoshima monkeys are also characterized by more frequent neutral encounters, less frequent agonistic encounters, more frequent unsuccessful displacement, a lower intensity of aggression, and more frequent counter-aggression between groups. These characteristics suggest that intergroup relationships on Shodoshima Island are more tolerant than those in other Japanese macaque populations. This study reveals considerable differences in intergroup encounters within local populations of Japanese macaques living in similar environments, and emphasizes the role of social factors in such intra-specific variation.

Group extinction and fusion in free-ranging vervet monkeys

1986 ◽  
Vol 11 (1) ◽  
pp. 63-77 ◽  
Author(s):  
Marc D. Hauser ◽  
Dorothy L. Cheney ◽  
Robert M. Seyfarth
Keyword(s):  
Vervet Monkeys ◽  
Free Ranging ◽  
Group Extinction

Thermoregulatory plasticity in free-ranging vervet monkeys, Chlorocebus pygerythrus

2014 ◽  
Vol 184 (6) ◽  
pp. 799-809 ◽  
Author(s):  
Alwyn Lubbe ◽  
Robyn S. Hetem ◽  
Richard McFarland ◽  
Louise Barrett ◽  
Peter S. Henzi ◽  
...  
Keyword(s):  
Vervet Monkeys ◽  
Chlorocebus Pygerythrus ◽  
Free Ranging

Diurnal and Seasonal Variations in Vervet Monkeys' Activity

1998 ◽  
Vol 83 (2) ◽  
pp. 675-685 ◽  
Author(s):  
Maribel Baldellou ◽  
Ana Adan
Keyword(s):  
Climatic Factors ◽  
Diurnal Variations ◽  
Vervet Monkeys ◽  
Social Grooming ◽  
Seasonal Influence ◽  
Sexual Competition ◽  
Seasonal Differences ◽  
Hourly Distribution ◽  
Free Ranging ◽  
Increased Activity

This paper analyzed seasonal and diurnal differences in feeding, locomotion, inactivity, and social grooming of adult and subadult free-ranging vervet monkeys in Natal (38°35′S and 31°46′E). Breaking down hourly activity budgets from the perspective of reproductive seasons (birth, premating, and mating seasons) which correspond to environmental conditions in Natal, we obtained several results. First, there were diurnal variations for all the behaviours in all seasons studied, except for inactivity during the mating season when days were shorter and there was greater food shortage and sexual competition. Second, the seasonal influence on the hourly periods of increased activity could not be explained solely by the photoperiod or by the other climatic Factors analyzed. Finally, over-all seasonal differences in activity were mainly reflected by the hourly distribution of feeding in the morning and the pattern of inactivity throughout the day. Therefore, rhythms in activity should be understood in terms of adaptation to both climatic constraints and other unrelated metabolic requirements.

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