Publications

angiostrongylus cantonensis central nervous system infection in captive callitrichids in texas.	angiostrongylus cantonensis is a tropical lungworm of rats known for central nervous system migration in aberrant primate hosts. here, we describe a. cantonensis infection in three captive callitrichids from a texas zoo. the affected animals included a goeldi's monkey (callimico goeldii), a cotton-top tamarin (saguinus oedipus), and a pied tamarin (saguinus bicolor) that ranged from 8 to 18 years old. clinical signs included lethargy, ataxia, and seizures. histologically, these animals had an eo ...	2020	32057389
individual, social, and environmental factors affecting salivary and fecal cortisol levels in captive pied tamarins (saguinus bicolor).	pied tamarins (saguinus bicolor) are endangered new world primates, and in captivity appear to be very susceptible to stress. we measured cortisol in 214 saliva samples from 36 tamarins and in 227 fecal samples from 27 tamarins, and investigated the effects of age, sex, pregnancy, rearing history, social status, weight, group composition, and enclosure type using generalized linear mixed models. there was no effect of age on either fecal or salivary cortisol levels. female pied tamarins in late ...	2019	31368125
differential chromosomal organization between saguinus midas and saguinus bicolor with accumulation of differences the repetitive sequence dna.	saguinus is the largest and most complex genus of the subfamily callitrichinae, with 23 species distributed from the south of central america to the north of south america with saguinus midas having the largest geographical distribution while saguinus bicolor has a very restricted one, affected by the population expansion in the state of amazonas. considering the phylogenetic proximity of the two species along with evidence on the existence of hybrids between them, as well as cytogenetic studies ...	2017	28634866
diagnosis and management of benign prostatic hyperplasia in a pied tamarin (saguinus bicolor).	an intact male pied tamarin (saguinus bicolor) presented with a hunched posture while moving, dysuria, pollakiuria, and hematuria. after diagnostic imaging assessment and prostate biopsy, benign prostatic hyperplasia was diagnosed. treatments with delmadinone acetate and osaterone caused clinical signs and hematuria to resolve temporarily for a variable period of time. because of frequent recurrence, elective surgical castration was performed, leading to resolution of the clinical signs.	2016	27468035
why do captive pied tamarins give birth during the day?	diurnal primates typically give birth at night, when it is presumed that they are safer at a very vulnerable time, and this is reflected in an overwhelmingly nocturnal pattern of delivery in most species of callitrichidae. however, over half (51.1%) of 88 births to pied tamarins (saguinus bicolor) at durrell wildlife park occurred during the day (0800-1700), almost always in the afternoon. nearly three quarters of breeding females (17/23) had at least one diurnal birth, including females from al ...	2016	27684732
fecal glucocorticoid metabolite responses to management stressors and social change in four species of callitrichine monkeys.	the use of enzyme immunoassays (eia) for the non-invasive measurement of glucocorticoids provides a valuable tool for monitoring health and welfare in sensitive species. we validated methods for measuring fecal glucocorticoid metabolites (fgm) using the response to veterinary exams for four species of callitrichine monkeys: golden lion tamarin (leontopithecus rosalia, n = 7), callimico (callimico goeldii, n = 2), pied tamarin (saguinus bicolor, n = 2), and white-fronted marmoset (callithrix geof ...	2016	26831854
effects of forest fragmentation on genetic diversity of the critically endangered primate, the pied tamarin (saguinus bicolor): implications for conservation.	we analyzed dna at 9 microsatellite loci from hair samples of 73 pied tamarins (saguinus bicolor) located in 3 urban forest fragments and a biological reserve in the city of manaus, amazonas, brazil. the forest fragments had become isolated from the continuous forest 6-15 years prior to the time of sampling. tests for reduction in population size showed that all groups from the urban forest fragments had undergone genetic bottlenecks. pied tamarins in this region historically formed one biologic ...	2015	26245786
infection rates and genotypes of trypanosoma rangeli and t. cruzi infecting free-ranging saguinus bicolor (callitrichidae), a critically endangered primate of the amazon rainforest.	parasites of wild primates are important for conservation biology and human health due to their high potential to infect humans. in the amazon region, non-human primates are commonly infected by trypanosoma cruzi and t. rangeli, which are also infective to man and several mammals. this is the first survey of trypanosomiasis in a critically endangered species of tamarin, saguinus bicolor (callitrichidae), from the brazilian amazon rainforest. of the 96 free-ranging specimens of s. bicolor examine ...	2008	18603222
behavioral effects of introducing pied tamarin (saguinus bicolor) to black howler monkey (alouatta caraya) and white-faced saki (pithecia pithecia) in a zoological park.	mixed-species primate exhibits are becoming more common in zoological parks as a means to display a diverse array of animals both more naturalistically and with more economy of space. here, we describe behavioral changes during the introduction process of a pair of pied tamarins (saguinus bicolor) to an established group of black howler monkeys (allouatta caraya) and white-faced saki monkeys (pithecia pithecia). data were collected during six phases, representing introductions among the various ...	2008	18176938
trypanosoma cruzi transmission in a captive primate unit, rio de janeiro, brazil.	a breeding in captivity program of neotropical primates for subsequent reintroduction in nature is in progress at the primatology center of rio de janeiro (cprj). almost 200 animals of 20 species that include both wild captured animals and specimens born in captivity are maintained in cprj. here, we examined 198 primates of cprj for infection with the protozoan parasite trypanosoma cruzi. the animals included 18 species of eight genera. we also performed an "ad lib" search for triatomines that c ...	2004	14739028
feeding ecology of saguinus bicolor bicolor (callitrichidae: primates) in a relict forest in manaus, brazilian amazonia.	this study is part of a long-term ecological study of habitat and dietary requirements of the pied bare-face tamarin (saguinus bicolor bicolor). one group was studied for 11 months in an area of secondary forest in a suburb of manaus, amazonas, brazil. three main vegetation types occurred inside the group's home range (12 ha): capoeira, older secondary forest and campinarana (white sand forest). the tamarins ate fruits (21 species), flowers (1 species), exudates (4 species), and arthropods (inse ...	1992	1297629
urinary oestrogen and progesterone excretion before and during pregnancy in a pied bare-face tamarin (saguinus bicolor bicolor).	oestrone, oestradiol-17 beta and progesterone were measured by radioimmunoassay in daily urine samples after pairing and during subsequent pregnancy in a pied bare-face tamarin. on the basis of excretion profiles an ovarian cycle length of about 3 weeks and a gestation length of about 160 days are suggested. oestrone was the predominant urinary oestrogen excreted by the non-pregnant and pregnant pied bare-face tamarin, the oestrone/oestradiol ratio being greater than 100:1. the results suggest t ...	1987	3116235