The Social System of Lariang Tarsiers <Emphasis Type="Italic">(Tarsius lariang)</Emphasis> as Revealed by Genetic Analyses |
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Authors: | Christine Driller Dyah Perwitasari-Farajallah Hans Zischler Stefan Merker |
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Institution: | (1) Institute of Anthropology, Johannes-Gutenberg University of Mainz, 55099 Mainz, Germany;(2) Primate Research Center, Bogor Agricultural University, Bogor, 16151, Indonesia;(3) Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Bogor, Indonesia |
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Abstract: | Previous sociobiological studies of tarsiers were invariably based on field observations. Sulawesi tarsiers are known for
monogamous or facultative polygynous social mating systems, but, to date, no data exist to describe the genetic mating system.
We here bring together behavioral studies and molecular tools for the first time to elucidate mating behavior and kinship
within a tarsier population. We investigated the social system of the recently described Tarsius lariang, which researchers have never studied before. Between September and November 2005, we conducted field observations and sampling
in central Sulawesi, Indonesia, where this species is endemic. Ten of 11 social groups of the focal population were composed
of 1 adult male, 1 adult female, and putative offspring. To enlighten genetic relationships, we used 12 microsatellite loci
and mitochondrial DNA sequences of 26 captured and sampled Lariang tarsiers for parentage and relatedness analyses. A significant
number of young were the offspring of the sampled group adults, suggesting a predominantly monogamous social and genetic mating
system. There is evidence for extrapair young in groups in which adult pairs exhibit close relationships, leading to the assumption
that extrapair mating is solicited to avoid inbreeding. Ten of 11 social groups lived in monogamous social systems, indicating
monogamy to be the rule in Tarsius lariang. |
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Keywords: | extrapair mating microsatellites monogamy parentage tarsiers |
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