Publications

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trypanosoma cruzi infection of free-ranging lion-tailed macaques (macaca silenus) and ring-tailed lemurs (lemur catta) on st. catherine's island, georgia, usa.free-ranging old world primates released on st. catherine's island, georgia (usa), were tested for infection with trypanosoma cruzi as part of a study of the epizootiology of sylvatic t. cruzi in the southeastern usa. the parasite was observed in liver infusion tryptose medium cultures of blood from seven of 11 lion-tailed macaques (macaca silenus) and one of 19 ring-tailed lemurs (lemur catta). cultures of blood from 10 black and white ruffed lemurs (varecia variegata) were all negative. analys ...19989638621
changes in behavior in free-ranging lemur catta following release in a natural habitat.the adjustment of captive-reared and developmentally deprived ringtailed lemurs (lemur catta) to supported release on st. catherine's island, georgia, was studied over 7 years to examine if these animals developed behavior comparable to wild populations. initial changes after release included decreased obesity and increased agility as well as foraging for appropriate novel plants. ranging, daily behavior cycles, and vocalizations developed more slowly over 1-3 years, but eventually the behavior ...19999888718
molecular and serologic evidence of tick-borne ehrlichiae in three species of lemurs from st. catherines island, georgia, usa.in recent years, several species of ehrlichiae have been recognized as tick-borne disease agents of veterinary and medical importance. clinically normal free-ranging or previously free-ranging lemurs, including 46 ring-tailed lemurs (lemur catta), six blue-eyed black lemurs (eulemur macaco flavifrons), and four black and white ruffed lemurs (varecia variegata variegata) from st. catherines island, georgia, were tested for evidence of exposure to tick-borne ehrlichiae. all 52 adult lemurs were se ...200415732591
seroprevalence of toxoplasma gondii, sarcocystis neurona, and encephalitozoon cuniculi in three species of lemurs from st. catherines island, ga, usa.in the current study, we determined the seroprevalence of toxoplasma gondii, sarcocystis neurona, and encephalitozoon cuniculi in three species of lemurs from st. catherines island, georgia. serum samples were tested from 52 ring-tailed lemurs (lemur catta), six blue-eyed black lemurs (eulemur macaco flavifrons), and four black and white ruffed lemurs (varecia variegata variegata) using an agglutination assay. three ring-tailed lemurs (5.8%) were positive for t. gondii (titer of 1:50); one ring- ...200717052854
trypanosoma cruzi prevalence and epidemiologic trends in lemurs on st. catherines island, georgia.lemurs on st. catherines island, georgia were tested for trypanosoma cruzi infection to develop a better understanding of the epizootiology of the parasite in nonhuman primates in the southeastern united states. fifty-six ring-tailed (lemur catta), blue-eyed black (eulemur macaco flavifrons), and black-and-white ruffed (varecia variegata variegata) lemurs were tested by hemoculture and serology to determine the prevalence of t. cruzi in the population. of those tested 3 (5%) were identified as c ...200717436947
dispersal among male ring-tailed lemurs (lemur catta) on st. catherines island.male dispersal patterns were analyzed across a nine-year period in a population of ring-tailed lemurs (lemur catta) on st. catherines island (sci), usa, to evaluate two ultimate explanations for male dispersal: inbreeding avoidance and intrasexual mating competition. as part of this analysis, we also compared patterns of dispersal at this site with data from wild populations. overall, we found that patterns of male intertroop movement on sci are similar to the wild with respect to the frequency ...200818478578
dominance rank reversals and rank instability among male lemur catta: the effects of female behavior and ejaculation.in this study, dominance rank instability among male lemur catta during mating was investigated. also, data on agonism and sexual behavior across five consecutive mating seasons in a population of l. catta on st. catherines island, usa, were collected. instances of male rank instability were categorized into three types. type 1 consisted of a temporary switch in the dominance ranks of two males, which lasted for a period of minutes or hours. type 2 dyadic male agonistic interactions showed highl ...200918785630
nocturnal ranging by a diurnal primate: are ring-tailed lemurs (lemur catta) cathemeral?cathemerality, an activity pattern comprised of distinct periods of diurnal and nocturnal activity, is a trait found among several of the malagasy strepsirhines and one species of aotus. because occasional anecdotal reports suggest that some diurnal primates can be active at night, i investigated the possibility of nocturnal ranging behavior in the ring-tailed lemur (lemur catta) by using global positioning system (gps) collars programmed to collect data across a 24-h period. five individuals in ...201121717291
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