Abstract
Between June 1986 and October 1992, in 3 periods totaling 12 months, we studied social organization of pigtailed langurs (Simias concolor)in the Pagai Islands, Indonesia. With one possible exception, all of 20 family groups contained only 1 adult male each. Nine of them contained only 1 adult female, and 11 contained ≥2 adult females. Mean group size is 4.1 individuals. Home ranges varied from 7 to 20 ha, and population density averages 21 animals/km 2 . Simias concolor is sexually dimorphic{rightwards two-headed arrow with tail}n a museum sample males average 29% heavier than females, and their canine teeth are on average nearly twice the length of female canines. Combined data from several studies indicate that 60% of S. concolor groups contain an adult pair plus young, and 40% are multifemale groupings. We sggest that any 1-male mating system that comprises a mixture of 1-female and multifemale groups in the same population should be termed monandry.
Original language | English (US) |
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Pages (from-to) | 295-310 |
Number of pages | 16 |
Journal | International Journal of Primatology |
Volume | 16 |
Issue number | 2 |
DOIs | |
State | Published - Jun 1995 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Ecology, Evolution, Behavior and Systematics
- Animal Science and Zoology
Keywords
- Mentawai Islands
- Simias concolor
- home range
- leadership
- monandry
- multifemale groups
- one-female groups
- one-male groups
- pigtailed langur
- population density
- sex ratio
- sexual dimorphism
- unmated males