T. R. Harris

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Many studies in molecular ecology rely upon the genotyping of large numbers of low-quantity DNA extracts derived from noninvasive or museum specimens. To overcome low amplification success rates and avoid genotyping errors such as allelic dropout and false alleles, multiple polymerase chain reaction (PCR) replicates for each sample are typically used.(More)
Tara R. Harris, Colin A. Chapman, and Steven L. Monfort Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, Leipzig, Germany 04103, Conservation and Research Center, Smithsonian National Zoo, 1500 Remount Road, Front Royal, VA 22630, Department of Anthropology and McGill School of Environment, 855 Sherbrooke St.(More)
Recently, considerable intraspecific variation in the diets and ranging behavior of colobine monkeys has been described, although in most cases this has involved documenting variation between, not within, sites. Some African colobines, such as guerezas (Colobus guereza), are relatively abundant in disturbed habitats that are very heterogeneous, raising the(More)
In theory, between-group contest (BGC) competition for food can greatly influence female social relationships and reproductive success in primates, but few studies have investigated whether such effects occur and, if so, under what ecological conditions. There is evidence that adult male black and white colobus monkeys (Colobus guereza, “guerezas”) defend(More)
Many studies and reviews (e.g. Morton 1977; Fitch & Hauser 1995, 2002; Fitch 1997, 2000) have discussed the potential for mammalian vocalizations to provide honest signals of body size. Researchers have frequently investigated the link between fundamental frequency, F0 (i.e. pitch), and body size, but have not always found strong relationships between the(More)
Complex sex-biased dispersal patterns often characterize social-group-living species and may ultimately drive patterns of cooperation and competition within and among groups. This study investigates whether observational data or genetic data alone can elucidate the potentially complex dispersal patterns of social-group-living black and white colobus monkeys(More)
Infanticide has been observed in several colobines, but only one infanticide has previously been documented for black and white colobus monkeys (Colobus guereza). This report describes an infanticide observed in Kibale National Park, Uganda, in the summer of 2001. An adult male from a neighboring group attacked and killed a young infant whose mother(More)
Black and white colobus monkeys (Colobus guereza, "guerezas") show no external signs of estrus, and little is known about their mating behavior or reproductive endocrinology. To learn more about the life history characteristics and mating system of guerezas, we documented the mating behavior and ovarian hormone profiles of 10 cycling, lactating, and(More)