| food sharing among captive leontopithecus rosalia. | captive l. rosalia were observed to exchange food routinely in family groups, a process varying from donation to theft. donation involved the use of 'invitational' signals which operated most efficiently in parent-infant sharing and in donating live prey. food moved, by sharing and theft, toward: (a) males prior to the female's first conception; (b) females during late pregnancy; (c) carriers of infants; (d) weanlings; (e) juveniles when infants died; (f) third animals in trios, regardless of th ... | 1978 | 97189 |
| urinary chorionic gonadotropin levels in pregnant golden lion tamarins. preliminary observations. | we have established the interval over which urinary chorionic gonadotropin can be detected by a radioimmunoassay during pregnancy in the golden lion tamarin. preliminary findings indicate the potential value of this radioimmunoassay system for (1) diagnosis of pregnancy at about four weeks after fertilization; (2) estimation of the expected time of delivery; and (3) identification of individual monkeys having an apparent high risk of spontaneous abortion. | 1978 | 110938 |
| description and analysis of the arch display in the golden lion tamarin, leontopithecus rosalia rosalia. | three different arch displays are described in captive lion tamarins (leontopithecus rosalia rosalia) at the national zoological park. analysis of social behaviours including huddling, sexual activity, territorial encounters and arch displays suggests that arch displaying is motivated by conflicting tendencies of a nonaggressive nature and may function as a regulator of social contact, thus maintaining homeostasis within and between a social group. | 1979 | 118906 |
| a peak in sexual activity during mid-pregnancy in the golden lion tamarin, leontopithecus rosalia (primates: callitrichidae). | | 1977 | 411862 |
| [pigmentation disorders in a leontopithecus rosalia chrysomelas (kuhl, 1820), its treatment and recovery (callitrichidae, primates)]. | | 1978 | 416472 |
| relation between food preference and food-elicited vocalizations in golden lion tamarins (leontopithecus rosalia). | we report the results of 2 studies on food-elicited vocalizations in golden lion tamarins (leontopithecus rosalia). first, we investigated the preferences of 10 golden lion tamarins for 6 foods. tamarins prefer mealworms and raisins significantly more than apple, egg, carrot, or marmoset diet. food preference rank was significantly and positively correlated with the rank of latency to choose a particular food. second, we investigated the relation between food preference and 15 vocal parameters m ... | 1992 | 1600721 |
| patterns of social preference across different social contexts in golden lion tamarins (leontopithecus rosalia). | we investigated the role of mutual and circumstantial factors in maintaining exclusive social relationships in a new world primate. four breeding pairs of golden lion tamarins (leontopithecus rosalia rosalia) were allowed to interact with their mate or an unfamiliar, opposite-sex adult in each of 4 different social contexts: in view of the mate, out of the mate's view, with only the mate present, and with only the unfamiliar animal present. males and females were in proximity to, approached, and ... | 1990 | 2114250 |
| ectoparasitic acari found on golden lion tamarins (leontopithecus rosalia rosalia) from brazil. | anesthetized golden lion tamarins (leontopithecus rosalia rosalia), a highly endangered species, were examined for ectoparasites by brushing the fur and swabbing the ears. ectoparasites recovered from the fur included four species of immature ticks (amblyomma spp.), three species of chiggers (euschoengastia sp., microtrombicula brennani and speleocola tamarina), and one species of follicular mite (rhyncoptes anastosi). ectoparasites do not seem to be of particular significance to the health of t ... | 1989 | 2503627 |
| a new transmissible viral hepatitis of marmosets and tamarins. | callitrichid hepatitis (ch) is a newly recognized, acute, fatal, epizootic disease of new world primates in the family callitrichidae. since 1980, 12 outbreaks of ch have occurred in us zoos, involving several callitrichid species including the endangered golden lion tamarin (leontopithecus rosalia). ch was experimentally transmitted to common marmosets via a bacteria-free filtrate of liver from a naturally infected tamarin. all three inoculated marmosets developed an acute fatal disease with th ... | 1989 | 2509570 |
| genetic variation within and among lion tamarins. | the golden lion tamarin leontopithecus rosalia rosalia, one of the rarest and most endangered of new world primates, has been the focus of an intensive research and conservation effort for two decades. during that period, managed breeding from 44 founders has brought the captive population to over 400 individuals, a number that equals or exceeds the estimated number of free-ranging golden lion tamarins. the extent of genetic variation among golden lion tamarins was estimated with an electrophore ... | 1986 | 3096142 |
| mating patterns in the golden lion tamarin (leontopithecus rosalia): continuous receptivity and concealed estrus. | sociosexual behavior was monitored on a daily basis for 3 months in 5 pairs of golden lion tamarins (leontopithecus rosalia). urine samples were collected daily from each female and urinary estrogen cycles were determined by radioimmunoassay. mounts and copulations were observed during all phases of the estrogen cycle. peaks or regular cycles in sexual behavior were not documented. there were no significant changes in affiliative behavior by females or males that were associated with changes in ... | 1987 | 3143650 |
| patterns of urinary oestrogen excretion in female golden lion tamarins (leontopithecus rosalia). | daily urine samples were collected from 5 female golden lion tamarins (leontopithecus rosalia) over a period of 3 or more months, and urinary oestrogen concentrations were determined by radioimmunoassay. four females exhibited regular patterns of oestrogen excretion, with a peak-to-peak periodicity of 19.6 +/- 1.4 days. levels of oestrogen excretion tended to vary between, but not within, individual females. post-partum oestrogen patterns included periods of clear oestrogen cyclicity before conc ... | 1985 | 3934366 |
| pterygodermatites nycticebi (nematoda: spirurida) in golden lion tamarins. | pterygodermatites nycticebi (syn rictularia nycticebi), a spirurid nematode first described in the slow loris (nycticebus coucang), recently has been associated with morbidity and mortality in the golden lion tamarin (leontopithecus rosalia rosalia) collection at the national zoological park. adult worms were found in the lumen of the small intestine with their anterior ends embedded in the mucosa. larvae, when present, were deeper in the submucosa. a few heavily infected animals developed profo ... | 1983 | 6406763 |
| effects of age, sex, and reproductive status on scent marking frequencies in the golden lion tamarin, leontopithecus rosalia. | this study reports on the longitudinal changes in scent marking frequencies of male and female lion tamarins in relation to age, reproductive status, and group composition. juvenile males and females in family groups and subordinate males in trios (2 males, 1 female) scent marked infrequently. juvenile females scent marked less than juvenile males and began scent marking later. adult pair-bonded males and females scent marked with similar frequencies. females showed scent marking increases durin ... | 1980 | 6774938 |
| surgical correction of familial diaphragmatic hernia of morgagni in the golden lion tamarin. | the golden lion tamarin (leontopithecus rosalia) is an endangered species of primate indigenous to the coastal rain forest of brazil. since 1971 a propagation and behavioral research program has been carried out on a colony of these monkeys at the zoological park. several related animals have died and at necropsy have shown absence of the anterior portion of the diaphragm with a variety of abdominal viscera in the thorax. diagnostic studies undertaken on the living members of the colony include ... | 1981 | 6788931 |
| hematologic values of captive golden lion tamarins (leontopithecus rosalia): variations with sex, age, and health status. | blood samples obtained from 104 captive golden lion tamarins (leontopithecus rosalia), collected over a 7-year period, were analyzed for hematologic values. variations associated with sex, age, and health status were identified. females had higher total plasma protein values, while males had higher numbers of basophils, hematocrits, and hemoglobin concentrations. adult tamarins had higher erythrocyte and leukocyte counts, more neutrophils, basophils, and eosinophils, and higher hematocrits and h ... | 1982 | 6808243 |
| energy metabolism and thermoregulation in the golden lion tamarin (leontopithecus rosalia). | energy metabolism and body temperature were examined in leontopithecus rosalia, the golden lion tamarin. total standard metabolic rate (smr), defined as the metabolic rate of resting, fasted animals within thermoneutrality and during the inactive (nighttime) phase, averaged 381.5 +/- 65.2 ml o2.h-1 (mass-specific metabolic rate 0.520 +/- 0.089 ml o2.g-1.h-1). this value ranges from 73 to 89% of the expected smr for animals of this body size depending on the predictive equation used. active-phase ... | 1994 | 7750860 |
| locomotion in captive leontopithecus and callimico: a multimedia study. | video studies, gait analysis, footprint tracks, and observational scan sampling show that, in comparably furnished enclosures, leontopithecus rosalia and callimico goeldii are superficially similar in their use of predefined locomotor patterns but differ profoundly in many underlying details which reflect differences in postcranial morphology. each uses pronograde arboreal quadrupedal walking, quadrupedal bounding, and vertical climbing with comparable frequency, and both shift to bounding while ... | 1994 | 7943192 |
| dubin-johnson-like syndrome in golden lion tamarins (leontopithecus rosalia rosalia). | on routine blood screens, persistent conjugated hyperbilirubinemia was discovered in two groups of closely related adult female golden lion tamarins (leontopithecus rosalia rosalia, n = 8). bromosulfophthalein (bsp) retention tests were performed on four hyperbilirubinemic and three control tamarins. bsp excretion was delayed in hyperbilirubinemic tamarins as compared with controls. grossly, liver of affected tamarins was dark brown to black, with a prominent reticulated pattern. histologic exam ... | 1993 | 8116141 |
| a common-source outbreak of callitrichid hepatitis in captive tamarins and marmosets. | callitrichid hepatitis (ch) is a highly fatal, emerging arenavirus disease of captive south american marmosets and tamarins (callitrichidae), including the endangered golden lion tamarin. a common-source outbreak of ch in golden lion tamarins and pygmy marmosets at a us zoo resulted from a single feeding of the primates with newborn mice in apparently infected with lymphocytic choriomeningitis virus (lcmv). isolates from livers of mice and primates were related to isolates from previous ch outbr ... | 1993 | 8450260 |
| comparative study of oestrogen excretion in female new world monkeys: an overview of non-invasive ovarian monitoring and a new application in evolutionary biology. | oestrogen was measured in urine samples collected from captive females representing 7 species of new world monkey to provide an overview of the applicability of such formation in the noninvasive monitoring of ovarian function and to assess the potential applicability of such information in phylogenetic studies. species available for study were the pygmy marmoset, common marmoset, red-bellied tamarin, cotton-top tamarin, golden lion tamarin, goeldi's monkey and the owl monkey. oestrone conjugates ... | 1995 | 8529968 |
| natural and induced ovarian synchrony in golden lion tamarins (leontopithecus rosalia). | ovarian cycle synchrony was assessed in spontaneously cycling female golden lion tamarins by monitoring longitudinal (16 mo) urinary steroid metabolite (estrone conjugates; pregnanediol-3 alpha-glucuronide, pdg) excretion in four pairs (n = 8) of females isolated from males. the overall mean ovarian cycle duration was 18.5 +/- 0.3 days (n = 136 cycles; mean range, 15.7-21.0 days), and there was no evidence of reproductive seasonality. laparoscopic ovarian examinations confirmed that cyclic fluct ... | 1996 | 8879503 |
| foraging ecology and use of space in wild golden lion tamarins (leontopithecus rosalia). | in this paper we describe the use of space and feeding ecology of seven groups of golden lion tamarins observed for a total of 2,164 hr in poço das antas reserve, rio de janeiro, brazil. relative to habitat availability in the home ranges of these groups, lion tamarins spent more time than expected in relatively undisturbed swamp forests and less time than expected in more degraded hillside and pasture habitats. home range area was correlated with group biomass but not group size. golden lion ta ... | 1997 | 9093693 |
| chromosomal similarities and differences between tamarins, leontopithecus and saguinus (platyrrhini, primates). | the karyotypes of two taxa of genus leontopithecus (rosalia and chrysomelas) are studied. their g-, c- and nor-banding patterns are compared with those of representatives of the genus saguinus to determine chromosomal similarities and differences between the two genera and thus contribute to explaining phylogenetic relations between the tamarins. leontopithecus, like the saguinus, presents 2n = 46, 14 autosomes plus the y acrocentric and 30 autosomes plus the x biarmed. no chromosomal rearrangem ... | 1997 | 9359969 |
| fatal toxoplasma gondii infection in golden lion tamarins (leontopithecus rosalia rosalia). | four of five golden lion tamarins (leontopithecus rosalia rosalia) died after a brief period of illness 13 to 21 days following the consumption of a feral mouse by the group. three of the four animals died within hours after being observed as clinically healthy. the fourth animal became weak, failed to respond to treatment, and died several hours after treatment. at necropsy, there were bands of serosal and mucosal hemorrhages of the intestines, and the lungs were mottled. histologically, necros ... | 1997 | 9523646 |
| functional and adaptive significance of primate pads and claws: evidence from new world anthropoids. | this study tests predicted morphoclines in fingertip morphology among four small-bodied (<1 kg) new world monkeys (saimiri sciureus, leontopithecus rosalia, callithrix jacchus, and saguinus oedipus) in order to test previous functional and adaptive explanations for the evolution of flattened nails, expanded apical pads, and grasping extremities within the order primates. small-bodied platyrrhines which frequently forage among small-diameter substrates are expected to possess 1) relatively expand ... | 1998 | 9637179 |
| fatal acute toxoplasmosis in three golden lion tamarins (leontopithecus rosalia). | fatal acute toxoplasmosis was diagnosed in three golden lion tamarins (leontopithecus rosalia), a breeding pair and their male offspring, by histology and immunohistochemistry. the distribution and severity of lesions differed among the animals, but the small intestine and the pancreaticoduodenal lymph nodes were especially affected. protozoal organisms consistent with toxoplasma gondii tachyzoites, often clustered, were seen in all lesions and were specifically immunostained with a t. gondii po ... | 1998 | 9638627 |
| the complexity of the sylvatic cycle of trypanosoma cruzi in rio de janeiro state (brazil) revealed by the non-transcribed spacer of the mini-exon gene. | american trypanosamiasis occurs in nature as a sylvatic cycle, where trypanosoma cruzi interacts with wild triatomines and mammalian reservoirs, such as marsupials, rodents, armadillos and other animals. due to difficulties in trying to isolate t. cruzi stocks from the sylvatic cycle, very few studies have been performed in order to understand the parasite infection in natural environments. traditionally t. cruzi has been considered to be composed of a highly heterogeneous population of parasite ... | 1999 | 10028530 |
| food transfers in wild and reintroduced golden lion tamarins, leontopithecus rosalia. | we collected data from wild and reintroduced golden lion tamarins (leontopithecus rosalia) to describe the behavior of donor and recipient during food transfers, evaluate the effect of supplemental feeding on food transfer behavior, and examine various hypotheses concerning the function of food transfers in primates. behavioral observations were conducted on 12 groups of tamarins with young (n = 30) between the ages of 1 week and 1 year old. results show that food transfers involve various behav ... | 1999 | 10402039 |
| effects of allocare-givers on fitness of infants and parents in callitrichid primates. | the effects of callitrichid primate helpers (allocare-givers other than an infant's father) on the survival, reproduction or behavior of infants and parents are reviewed, using both published studies and data from free-ranging golden lion tamarins (leontopithecus rosalia). three lines of evidence suggest that helpers may increase their own inclusive fitness: (1) the number of adult males acting as helpers in free-ranging groups is correlated with the number of surviving infants in 3 callitrichid ... | 2000 | 10686485 |
| trypanosoma cruzi infection in leontopithecus rosalia at the reserva biológica de poco das antas, rio de janeiro, brazil. | wild golden lion tamarins (leontopithecus rosalia) - endangered primates that are native to the brazilian atlantic coastal forest - were surveyed for the presence of trypanosoma cruzi with the use of giemsa-stained blood smears, hemocultures and an indirect immunofluorescence assay (ifat). positive ifat with titers ranging from 1:20 to 1:1280 were observed in 52% of the 118 wild tamarins examined and the parasite was isolated from 38 tamarins. no patent parasitemia was observed among the tamarin ... | 2000 | 10904398 |
| phylogeny of lion tamarins (leontopithecus spp) based on interphotoreceptor retinol binding protein intron sequences. | the evolutionary relationships of the lion tamarins (leontopithecus) were investigated using nuclear interphotoreceptor retinol binding protein (irbp) intron sequences. phylogenetic reconstructions strongly support the monophyly of the genus, and a sister relationship between the golden lion tamarin, leontopithecus rosalia, and the black lion tamarin, l. chrysopygus, to the exclusion of the golden-headed lion tamarin, l. chrysomelas. the most parsimonious evolutionary reconstruction suggests tha ... | 2001 | 11329166 |
| sources of variability in numbers of live births in wild golden lion tamarins (leontopithecus rosalia). | we examined the effects of several variables on the number of live births in multiparous females in a wild population of golden lion tamarins (leontopithecus rosalia). independent variables included the number of infants born to a female the previous breeding season, the number of infants weaned the previous breeding season, the female's age and body mass, the number of adult males and helpers in the group, and the inbreeding coefficient of the offspring. we also tested the hypothesis that trapp ... | 2001 | 11468751 |
| measurement and cycle variability: reexamining the case for ovarian-cycle synchrony in primates. | critical reviews of menstrual synchrony studies, over the last 15 years, strongly suggest that synchrony may be a methodological artifact. the primary focus of this paper is on reexamining the evidence for synchrony in the two other primate species: chimpanzees (pan troglodytes) and golden lion tamarins (leontopithecus rosalia). it is demonstrated, with computer simulation, that cycle variability can yield misleading measurements of synchrony when it is assumed that the mean absolute difference ... | 2001 | 11738507 |
| does the milk of callitrichid monkeys differ from that of larger anthropoids? | the generalization that anthropoid primates produce dilute milks that are low in protein and energy is based primarily on data from large monkeys of the families cebidae and cercopithecidae, as well as humans. the marmosets and tamarins (callitrichidae) are not only much smaller in body size, but also typically raise multiple offspring during a relatively brief lactation. we hypothesized that selection for small body size and high reproductive rate might favor secretion of milk of higher energy ... | 2002 | 11793418 |
| acoustic differences between spontaneous and induced long calls of golden lion tamarins, leontopithecus rosalia. | long calls are emitted by several primate taxa and appear to have multiple functions related to spacing mechanisms and reproduction. yet, in some species the spontaneous rate of emission of these calls is low, and playbacks are used to elicit long calls to augment the sample size of studies. the objective of this study was to compare the acoustic structure of spontaneously emitted and experimentally induced long calls of golden lion tamarins. results from 6 adult tamarins show that spontaneously ... | 2002 | 12207059 |
| census and distribution of the golden lion tamarin (leontopithecus rosalia). | during 1990-1992, a survey of the golden lion tamarin, leontopithecus rosalia, was carried out throughout its known distribution area. forest remnants were identified by visual interpretation of landsat-tm satellite images. localities occupied by l. rosalia were first identified by interviews with local people. all forests more than 20 ha in size, and for which two or more interviews suggested the presence of the species, were surveyed using "play-back" recordings of lion tamarin long calls. the ... | 2003 | 12526037 |
| restoration of reproductive potential following expiration or removal of melengestrol acetate contraceptive implants in golden lion tamarins (leontopithecus rosalia). | although reversible contraception is important to successful management of small populations, there are concerns about the reversibility of melengestrol acetate (mga), the most commonly used implant in captive animals. female golden lion tamarins (leontopithecus rosalia) placed in potential breeding situations after surgical mga implant removal showed a 75% return to reproduction within 2 yr, unlike golden-headed tamarins (leontopithecus chrysomelas), which have had a 29% return to reproduction ... | 2001 | 12785695 |
| ontogenetic characteristics of the vomeronasal organ in saguinus geoffroyi and leontopithecus rosalia, with comparisons to other primates. | it has been suggested that the variability of the primate vomeronasal organ (vno) may be greater than previously thought, especially among new world monkeys. it is not clear to what extent vno variation reflects ontogenetic, functional, or phylogenetic differences among primates. the present study investigated vno anatomy in an ontogenetic series of two genera of callitrichid primates, in order to assess recent attempts to develop vno character states and to examine the evidence for vno function ... | 2003 | 12884316 |
| changes in locomotor and foraging skills in captive-born, reintroduced golden lion tamarins (leontopithecus rosalia rosalia). | the behavior of reintroduced, captive-born animals is understudied, limiting the scientific understanding and utility of reintroduction as a conservation tool. this work describes changes in locomotor and foraging behaviors in captive-born golden lion tamarins over the first 18 months after their release into the wild. the subjects included 73 individuals living in and around the poco das antas biological reserve in brazil between 1984 and 1996. the differences between animals that survived 6 mo ... | 2004 | 14752809 |
| disseminated lethal encephalitozoon cuniculi (genotype iii) infections in cotton-top tamarins (oedipomidas oedipus)--a case report. | for the first time, encephalitozoon (e.) cuniculi genotype iii ('dog strain') was verified in two cotton-top tamarins (oedipomidas oedipus) by light microscopy, immunohistochemistry, electron microscopy, pcr and sequencing. the animals had a disseminated lethal infection with this protist. in earlier reports, genotype iii had been found only in domestic dogs, man, emperor tamarins (saguinus imperator) and golden lion tamarins (leontopithecus rosalia). this investigation establishes now that the ... | 2004 | 14984833 |
| coprological helminth screening in brazilian free ranging golden lion tamarins, leontopithecus rosalia (l., 1766) (primates, callithrichidae). | | 2004 | 15029386 |
| ontogenetic observations on the vomeronasal organ in two species of tamarins using neuron-specific beta-tubulin iii. | callitrichid primates (tamarins, marmosets) have extreme variation in the vomeronasal organ (vno), including ontogenetic differences in the neuroepithelium and vomeronasal duct (vnd) patency at birth. such differences render the timing and extent of vno maturation debatable in callitrichids, but no studies have used neuron-specific immunohistochemical markers to address this question. the present study compared the number of vno epithelial cells that express immunoreactivity to neuron-specific b ... | 2004 | 15103735 |
| stereology of the liver in three species of leontopithecus (lesson, 1840) callitrichidae--primates. | studies on liver morphology and stereology are relevant to the comparative anatomical and pathological research. they also facilitate the use of non-human primates in basic research, which has substantially supported studies in human medicine. quantitative studies of liver structures have also been more extensive in old world primates and other vertebrates. twenty-three livers of adult lion tamarins were studied (six leontopithecus rosalia, seven leontopithecus chrysomelas, and 10 leontopithecus ... | 2004 | 15144289 |
| quantitative data on training new world primates to urinate. | this study assessed the effectiveness of operant conditioning in training three species of captive callitrichid primates (leontopithecus rosalia, callithrix geoffroyi, and saguinus imperator) to urinate on demand. there were three goals to the study: 1) to develop a system for quantitatively assessing positive reinforcement training; 2) to ascertain whether or not positive reinforcement techniques can be used to train callitrichid monkeys to urinate on demand, and if so, how many training sessio ... | 2004 | 15356860 |
| distinct patterns of trypanosoma cruzi infection in leontopithecus rosalia in distinct atlantic coastal rainforest fragments in rio de janeiro--brazil. | previous studies on infection of trypanosoma cruzi in the poço das antas biological reserve population of wild free-ranging leontopithecus rosalia have shown the presence of genotype t. cruzi ii, associated in brazil with human disease. herein, this study has been extended, the infection being evaluated in l. rosalia of 3 different tamarin populations, inhabiting distinct forest areas located in the same atlantic coastal rainforest. edentata, marsupialia, rodentia and chiroptera were examined ex ... | 2004 | 15648693 |
| effects of social status, age, and season on androgen and cortisol levels in wild male golden lion tamarins (leontopithecus rosalia). | this study examines factors affecting androgen and cortisol levels in wild, male golden lion tamarins (leontopithecus rosalia). golden lion tamarins are a cooperatively breeding species in which groups often contain two potentially breeding males. brothers frequently emigrate together and develop a clear dominance hierarchy, but interactions between them are primarily affiliative. duos in which the males are not related are less stable. in addition, reproductive skew theory predicts that dominan ... | 2006 | 15978593 |
| secondary pneumatization of the maxillary sinus in callitrichid primates: insights from immunohistochemistry and bone cell distribution. | the paranasal sinuses remain elusive both in terms of function and in the proximate mechanism of their development. the present study sought to describe the maxillary sinuses (mss) in three species of callitrichid primates at birth, a time when secondary pneumatization occurs rapidly in humans. the mss were examined in serially sectioned and stained slides from the heads of two callithrix jacchus, one leontopithecus rosalia, and two saguinus geoffroyi. specimens were examined microscopically reg ... | 2005 | 15983987 |
| social and reproductive factors affecting cortisol levels in wild female golden lion tamarins (leontopithecus rosalia). | the steroid hormone cortisol has been associated with different levels of "stress" as well as different reproductive conditions in many primates. in callitrichids, cortisol has more often been reflective of female reproductive status than of chronic stress. in this study, we addressed the hypothesis that wild golden lion tamarin (leontopithecus rosalia) females, whose social structure is characterized by low aggression and high social support, would not show rank ("stress")-related differences i ... | 2005 | 16163718 |
| clinical, biochemical, and electrocardiographic aspects of trypanosoma cruzi infection in free-ranging golden lion tamarins (leontopithecus rosalia). | wild golden lion tamarins from the biological reserve of poço das antas, rio de janeiro, brazil, have high prevalence of trypanosoma cruzi infection leading us to clinically assess the disease in this endangered species. | 2006 | 16430495 |
| energy intake, energy expenditure, and reproductive costs of female wild golden lion tamarins (leontopithecus rosalia). | callitrichid females are often described as energetically constrained. we examined the energy budgets of 10 female wild golden lion tamarins (glts, leontopithecus rosalia) in an effort to understand how energy intake and expenditure might influence physical condition and therefore reproductive performance. we used focal animal sampling to record behavioral data and conducted energy analyses of foods consumed by glts to estimate intake and expenditure. we used two-tailed wilcoxon signed-rank test ... | 2006 | 17044004 |
| do cavity-nesting primates reduce scent marking before retirement to avoid attracting predators to sleeping sites? | the largest population of endangered golden lion tamarins (leontopithecus rosalia, glts) decreased from approximately 330 to 220 individuals between 1995 and 2000 due to a dramatic increase in predation at sleeping sites. we used behavioral data from eight social groups in this population to test two hypotheses: first, if glts attempt to mitigate the risk of predation at sleeping sites, they should reduce their rates of scent marking just prior to retirement. second, if the benefits of scent mar ... | 2007 | 17146798 |
| golden lion tamarin sleeping-site use and pre-retirement behavior during intense predation. | sleeping sites, their patterns of use, and cryptic pre-retirement behavior mitigate predation risk at sleeping sites and could influence prey fitness. we evaluated sleeping-site usage for 10 groups of golden lion tamarins (glts) from a population that recently suffered a substantial decline due to predation at sleeping sites. we recorded the average number of nights that groups spent at their different sleeping sites to determine whether patterns of sleeping-site use were influenced by predation ... | 2007 | 17154389 |
| prevalence and intensity of intestinal helminths found in free-ranging golden lion tamarins (leontopithecus rosalia, primates, callitrichidae) from brazilian atlantic forest. | helminth identification and egg counts were performed in 316 fecal samples during 4 years in 199 golden lion tamarins (glts), leontopithecus rosalia, from two brazilian conservation units. tamarin sex and age, area of occurrence and helminth co-infection were tested as potential factors that could affect helminth prevalence and egg shedding in host individuals. three nematodes species were found at low prevalences but not in both conservation units: ancylostomatidae (12%), ascarididae (1%) and t ... | 2007 | 17223269 |
| placental retention in a golden lion tamarin (leontopithecus rosalia). | a 4-yr-old female golden lion tamarin (leontopithecus rosalia) had placental retention after delivery of a stillborn fetus. conservative therapy with oxytocin and dinoprost tromethamine did not result in placental expulsion and ovariohysterectomy was performed. placental retention is a rare condition in humans and has not been well documented in non-human primates. | 2005 | 17312734 |
| cholelithiasis in four callitrichid species (leontopithecus, callithrix). | medical records of three male and three female callitrichids of four species (leontopithecus chrysopygus, leontopithecus rosalia, callithrix argentata argentata, callithrix kuhlii) diagnosed with cholelithiasis were reviewed. ages of affected animals at the time of diagnosis ranged from 2-14 yr. definitive antemortem diagnosis of cholelithiasis was made in four of the six cases. chronic weight loss, lethargy, and weakness were seen in all cases. chronic intermittent diarrhea was seen in three ca ... | 2006 | 17312811 |
| tree and forest characteristics influence sleeping site choice by golden lion tamarins. | lion tamarin monkeys are among a small number of primates that repeatedly use a few tree holes for the majority of their sleeping sites. to better understand why lion tamarins rely on tree holes as sleeping sites, we compared the physical characteristics of frequently used sleeping sites, infrequently used sleeping sites, and randomly selected forest locations at multiple spatial scales. from 1990 to 2004, we recorded 5,235 occurrences of sleeping site use by 10 groups of golden lion tamarins (l ... | 2007 | 17358010 |
| evaluation of control and treatment of gongylonema spp. infections in callitrichids. | numerous cases of gongylonema spp. infection with associated pathological lesions and clinical signs were identified in a collection of goeldi's monkeys (callimico goeldii) (gms) at a zoological park during a 3-yr period. an increase in the incidence of clinical signs in the gms and other callitrichid species prompted an investigation to determine the prevalence of infection within the collection and evaluate treatment protocols. twenty-one callitrichids [nine gms, four golden lion tamarins (leo ... | 2007 | 17469272 |
| parasite community interactions: trypanosoma cruzi and intestinal helminths infecting wild golden lion tamarins leontopithecus rosalia and golden-headed lion tamarins l. chrysomelas (callitrichidae, l., 1766). | the parasite prevalence and infection intensity in primate wild populations can be affected by many variables linked to host and/or parasite ecology or either to interparasite competition/mutualism. in this study, we tested how host sex, age, and place of origin, as well parasitic concomitant infections affect the structure of golden lion and golden-headed lion tamarins parasite community, considering trypanosoma cruzi and intestinal helminths infection in these primates. a total of 206 tamarins ... | 2007 | 17676342 |
| fatty acid composition of wild anthropoid primate milks. | fatty acids in milk reflect the interplay between species-specific physiological mechanisms and maternal diet. anthropoid primates (apes, old and new world monkeys) vary in patterns of growth and development and dietary strategies. milk fatty acid profiles also are predicted to vary widely. this study investigates milk fatty acid composition of five wild anthropoids (alouatta palliata, callithrix jacchus, gorilla beringei beringei, leontopithecus rosalia, macaca sinica) to test the null hypothes ... | 2008 | 17916436 |
| frugivory and seed dispersal of golden lion tamarin (leontopithecus rosalia (linnaeus, 1766)) in a forest fragment in the atlantic forest, brazil. | the influence of the golden lion tamarin (leontopithecus rosalia) as a seed disperser was studied by monitoring two groups of tamarins from december 1998 to december 2000 (871.9 hours of observations) in a forest fragment in south-east brazil. the tamarins consumed fruits of 57 species from at least 17 families. they ingested the seeds of 39 species, and 23 of these were put to germinate in the laboratory and/or in the field. l. rosalia is a legitimate seed disperser because the seeds of all spe ... | 2008 | 18660951 |
| evolutionary modifications of human milk composition: evidence from long-chain polyunsaturated fatty acid composition of anthropoid milks. | brain growth in mammals is associated with increased accretion of long-chain polyunsaturated fatty acids (lcpufa) in brain phospholipids. the period of maximum accumulation is during the brain growth spurt. humans have a perinatal brain growth spurt, selectively accumulating docosahexaenoic acid (dha) and other lcpufa from the third trimester through the second year of life. the emphasis on rapid postnatal brain growth and lcpufa transfer during lactation has led to the suggestion that human mil ... | 2008 | 18809203 |
| pheochromocytoma in six new world primates. | six new world primates, including 2 golden lion tamarins (leontopithecus rosalia), 2 cotton-top tamarins (saguinus o. oedipus), 1 black howler monkey (alouatta caraya), and 1 black-handed spider monkey (ateles g. geoffroyi), were diagnosed with unilateral (4/6) or bilateral (1/6) adrenal or extra-adrenal (1/6) pheochromocytoma by light microscopy and immunohistochemical staining for chromogranin a. overt invasive behavior or metastases were not observed in any primate, and thus these neoplasms w ... | 2009 | 19276065 |
| helminths found in marmosets (callithrix penicillata and callithrixjacchus) introduced to the region of occurrence of golden lion tamarins (leontopithecusrosalia) in brazil. | the introduction of exotic species can increase the risk of extinction of native species through the introduction of new diseases, predation or resource competition. the marmosets callithrix penicillata and callithrix jacchus and hybrids of these two species have been introduced to privately owned forests in the lowland atlantic forest of the rio de janeiro state in brazil, the region of occurrence of the endangered golden lion tamarin, leontopithecus rosalia. because the ecology and biology of ... | 2010 | 20378249 |
| successful treatment of a chronic facial abscess using a prolonged release antibiotic copolymer in a golden lion tamarin (leontopithecus rosalia). | a 3-yr-old, female captive golden lion tamarin (leontopithecus rosalia) developed an abscess initially within the oral cavity that progressed to the cheek. treatment with amoxicillin/clavulanic acid, enrofloxacin, and sulfamethoxizole/trimethoprim resulted in temporary resolution of the abscess. cultures from the abscess included escherichia coli, enterobacter cloacae, hemolytic staphylococcus, and serratia marcescens. histopathology was consistent with chronic cellulitis. ceftazidime mixed with ... | 2010 | 20597224 |
| the bony labyrinth of the early platyrrhine primate chilecebus. | we document the morphology of the bony labyrinth of chilecebus carrascoensis, one of the best preserved early platyrrhines known, based on high resolution ct scanning and 3d digital reconstruction. the cochlea is low and conical in form, as in other anthropoids, but has only 2.5 spiral turns. when the allometric relationship with body mass is considered, cochlear size is similar to that in extant primates. the relative size of the semicircular canals, which is well within the range of other prim ... | 2010 | 20952046 |
| evolutionary glycomics: characterization of milk oligosaccharides in primates. | free oligosaccharides are abundant components of mammalian milk and have primary roles as prebiotic compounds, in immune defense, and in brain development. a mass spectrometry-based technique is applied to profile milk oligosaccharides from apes (chimpanzee, gorilla, and siamang), new world monkeys (golden lion tamarin and common marmoset), and an old world monkey (rhesus). the purpose of this study is to evaluate the patterns of primate milk oligosaccharide composition from a phylogenetic persp ... | 2011 | 21214271 |
| progressive parenting behavior in wild golden lion tamarins. | young primates in the family callitrichidae (the marmosets and tamarins) receive extensive and relatively prolonged care from adults. of particular note, callitrichid young are routinely provisioned until well after weaning by parents and helpers, which is in stark contrast to typical juvenile primates, who must acquire most of their food independently once they are weaned. adults of some callitrichid species produce a specialized vocalization that encourages immature group members to take proff ... | 2011 | 22479136 |
| lineage-specific serology confirms brazilian atlantic forest lion tamarins, leontopithecus chrysomelas and leontopithecus rosalia, as reservoir hosts of trypanosoma cruzi ii (tcii). | trypanosoma cruzi, the agent of chagas disease in humans, has a vast reservoir of mammalian hosts in the americas, and is classified into six genetic lineages, tci-tcvi, with a possible seventh, tcbat. elucidating enzootic cycles of the different lineages is important for understanding the ecology of this parasite, the emergence of new outbreaks of chagas disease and for guiding control strategies. direct lineage identification by genotyping is hampered by limitations of parasite isolation and c ... | 2016 | 27846858 |
| the multiple and complex and changeable scenarios of the trypanosoma cruzi transmission cycle in the sylvatic environment. | in this study, we report and discuss the results generated from over 20 years of studies of the trypanosoma cruzi sylvatic transmission cycle. our results have uncovered new aspects and reviewed old concepts on issues including reservoirs, true generalist species, association of mammalian species with distinct discrete typing units - dtus, distribution of t. cruzi genotypes in the wild, mixed infections, and t. cruzi transmission ecology. using parasitological and serological tests, we examined ... | 2015 | 26200785 |
| infection with trypanosoma cruzi tcii and tci in free-ranging population of lion tamarins (leontopithecus spp): an 11-year follow-up. | here, we present a review of the dataset resulting from the 11-years follow-up of trypanosoma cruzi infection in free-ranging populations of leontopithecus rosalia (golden lion tamarin) and leontopithecus chrysomelas (golden-headed lion tamarin) from distinct forest fragments in atlantic coastal rainforest. additionally, we present new data regarding t. cruzi infection of small mammals (rodents and marsupials) that live in the same areas as golden lion tamarins and characterisation at discrete t ... | 2015 | 25946156 |
| net effects of ecotourism on threatened species survival. | many threatened species rely on ecotourism for conservation funding, but simultaneously suffer direct ecological impacts from ecotourism. for a range of iucn-redlisted terrestrial and marine bird and mammal species worldwide, we use population viability analyses to calculate the net effects of ecotourism on expected time to extinction, in the presence of other anthropogenic threats such as poaching, primary industries and habitat loss. species for which these calculations are currently possible, ... | 2016 | 26886876 |
| the panorama of animal leptospirosis in rio de janeiro, brazil, regarding the seroepidemiology of the infection in tropical regions. | leptospirosis is an important disease caused by various serovars of leptospira sp. it can affect humans as well as domestic and wild animals; therefore, it has importance for public health, animal production, and wild species. the aim of this paper is to discuss the epidemiology of animal leptospirosis in rio de janeiro, brazil, as a possible model for other tropical regions. in several studies conducted in the last 20 years, a total of 47 rats, 120 dogs, 875 cows, 695 horses, 1,343 goats, 308 s ... | 2013 | 24289165 |
| 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 |
| preliminary findings on social and ecological correlates of a polyspecific association between a golden-headed lion tamarin (leontopithecus chrysomelas) and wied's marmosets (callithrix kuhlii). | the advantages of living in a group include feeding benefits and/or predation avoidance, while the disadvantages are typically related to competition. one way to avoid competition while maintaining the benefits of living in a group is to form interspecific associations with species with relatively little dietary overlap. here we report a stable association between a male golden-headed lion tamarin (ghlt), leontopithecus chrysomelas, and a group of wied's black-tufted-ear marmosets (wbtms), calli ... | 2017 | 27771832 |
| matching based on biological categories in orangutans (pongo abelii) and a gorilla (gorilla gorilla gorilla). | following a series of experiments in which six orangutans and one gorilla discriminated photographs of different animal species in a two-choice touch screen procedure, vonk & macdonald (2002) and vonk & macdonald (2004) concluded that orangutans, but not the gorilla, seemed to learn intermediate level category discriminations, such as primates versus non-primates, more rapidly than they learned concrete level discriminations, such as orangutans versus humans. in the current experiments, four of ... | 2013 | 24058886 |
| hepatic osteodystrophy in a golden lion tamarin (leontopithecus rosalia). | an 8-yr-old, captive, female golden lion tamarin ( leontopithecus rosalia ) with a 6-yr history of hyperbilirubinemia was examined for inappetence and weight loss. physical examination and blood pressure monitoring under anesthesia revealed hypothermia and hypotension, and blood work revealed hypoglycemia, markedly elevated liver enzymes, including serum alkaline phosphatase, aspartate aminotransferase, and alanine aminotransferase, and confirmed the hyperbilirubinemia. a complete blood count su ... | 2016 | 27691975 |
| treatment of diabetes mellitus in a golden lion tamarin (leontopithecus rosalia) with the glucagon-like peptide-1 mimetic exenatide. | an 8-yr-old male golden lion tamarin ( leontopithecus rosalia ) was diagnosed with diabetes mellitus based on hyperglycemia and persistent glycosuria. initial treatment consisted of the oral antihyperglycemic medications glipizide and metformin that resulted in decreased blood glucose concentrations; however, marked glycosuria persisted. insufficient improvement on oral antihyperglycemic therapy and poor feasibility of daily subcutaneous insulin therapy led to an investigation into an alternativ ... | 2016 | 27691959 |
| wildlife sequences of islet amyloid polypeptide (iapp) identify critical species variants for fibrillization. | amyloid can be detected in the islets of langerhans in a majority of type 2 diabetic patients. these deposits have been associated with β-cell death, thereby furthering diabetes progression. islet amyloid polypeptide (iapp) amyloidogenicity is quite variable among animal species, and studying this variability could further our understanding of the mechanisms involved in the aggregation process. thus, the general aim of this study was to identify iapp isoforms in different animal species and char ... | 2015 | 26300107 |
| wildlife sequences of islet amyloid polypeptide (iapp) identify critical species variants for fibrillization. | amyloid can be detected in the islets of langerhans in a majority of type 2 diabetic patients. these deposits have been associated with β-cell death, thereby furthering diabetes progression. islet amyloid polypeptide (iapp) amyloidogenicity is quite variable among animal species, and studying this variability could further our understanding of the mechanisms involved in the aggregation process. thus, the general aim of this study was to identify iapp isoforms in different animal species and char ... | 2015 | 26248521 |
| high rates of pregnancy loss by subordinates leads to high reproductive skew in wild golden lion tamarins (leontopithecus rosalia). | across taxa, cooperative breeding has been associated with high reproductive skew. cooperatively breeding golden lion tamarins (leontopithecus rosalia) were long thought to have a monogynous mating system in which reproduction was limited to a single dominant female. subordinates with few reproductive opportunities delayed dispersal and remained in the natal group to provide alloparental care to siblings, thus allowing dominant reproductive females to meet the energetic needs associated with hig ... | 2013 | 23454002 |
| diet, foraging, and use of space in wild golden-headed lion tamarins. | lion tamarins (callitrichidae: leontopithecus) are small frugi-faunivores that defend large home ranges. we describe results from the first long-term investigation of wild golden-headed lion tamarins (l. chrysomelas; ghlts). we present data about activity budgets, daily activity cycles, diet, daily path length, home range size, home range overlap, and territorial encounters for three groups of ghlts that were studied for 1.5-2.5 years in una biological reserve, bahia state, brazil, an area chara ... | 2004 | 15152369 |
| the effect of parental age gap on the sex ratio of golden lion tamarins born in zoos. | | 2003 | 12399661 |
| diagnosis and repair of familial diaphragmatic defects in golden lion tamarins. | diaphragmatic defects were identified in 11 of 130 golden lion tamarins. seven of the cases were found at necropsy (52 tamarins) and 4 were diagnosed by radiography (78 tamarins). when screening radiography revealed a thoracic mass, a barium series was indicated and either demonstrated loops of bowel within the thorax or suggested liver displacement by the cranial location of the intestine. in 1 case, pneumoperitoneum aided in the diagnosis, by showing liver displacement cranially in an eventrat ... | 1980 | 6778849 |
| trypanosoma cruzi transmission in the wild and its most important reservoir hosts in brazil. | trypanosoma cruzi (kinetoplastea: trypanosomatidae) infects all tissues of its hosts, which along with humans, include hundreds of mammalian species in the americas. the epidemiology of t. cruzi has been changing in that currently the majority of the cases and/or outbreaks of chagas disease occur by the ingestion of comestibles contaminated by t. cruzi metacyclic forms. these cases/outbreaks occur in distinct regional scenarios, mainly in the amazon biome and are related to the local interaction ... | 2018 | 30189896 |
| a comparative study of litter size and sex composition in a large dataset of callitrichine monkeys. | in many birds and mammals, the size and sex composition of litters can have important downstream effects for individual offspring. primates are model organisms for questions of cooperation and conflict, but the factors shaping interactions among same-age siblings have been less-studied in primates because most species bear single young. however, callitrichines (marmosets, tamarins, and lion tamarins) frequently bear litters of two or more, thereby providing the opportunity to ask whether variati ... | 2019 | 31389057 |
| nonhuman primate welfare: can there be a relationship between personality, lateralization and physiological indicators? | measuring personality is being used to improved nonhuman primate welfare. to expand its use, it is important to identify traits that are shared between species and that measures are reliable, easy to use and less time consuming. combining personality and other indicators strong validation of the results can be obtained. in the present study, we sought to determine if there is a link between physiological stress response (fecal cortisol metabolites), personality (ratings made by animal keepers an ... | 2019 | 31271769 |
| model life tables for the smaller new world monkeys. | mortality statistics from five populations of small new world monkeys (includinsg callithrix jaccus, leontopithecus rosalia, saguinus fuscicollis, and saguinus oedipus) were combined to generate a standard model life table reflecting the mortality patterns of these primates. the model is applied to three individual populations to illustrate a strategy for smoothing and interpolating mortality statistics of varying completeness and quality. © 1993 wiley-liss, inc. | 1993 | 31941182 |
| reproduction of the emperor tamarin (saguinus imperator) in captivity, with comparisons to cotton-top and golden lion tamarins. | little information has been published on the reproductive biology and behavior of the emperor tamarin (saguinus imperator). we analyzed twelve years of data on emperor tamarins at the los angeles zoo and made comparisons with data on cotton-top tamarins (saguinus o. oedipus) and golden lion tamarins (leontopithecus rosalia) from the same collection. secondary sex ratios did not differ significantly from 50:50. births were not strictly seasonal for any species. the number of infants reared had a ... | 1992 | 31948169 |
| competence of non-human primates to transmit leishmania infantum to the invertebrate vector lutzomyia longipalpis. | leishmaniasis is a zoonotic disease of worldwide relevance. visceral leishmaniasis is endemic in brazil, where it is caused by leishmania infantum with lutzomyia longipalpis being the most important invertebrate vector. non-human primates are susceptible to l. infantum infection. however, little is known about the role of these species as reservoirs. the aim of this study was to evaluate the transmissibility potential of visceral leishmaniasis by non-human primates through xenodiagnosis using th ... | 2019 | 30995227 |
| pattern of late dna replication of the allocyclic x chromosome in cebus apella and leontopithecus rosalia chrysomelas fibroblasts. | the pattern of late dna replication in the allocyclic x chromosome has been studied in the primary fibroblasts of two neotropical primates (cebus apella and leontopithecus rosalia chrysomelas). a comparison with previous reports showed a pattern identical with that of (1) the allocyclic x chromosome of human fibroblasts, and (2) the allocyclic x chromosome of rhesus and cebus lymphocytes. our results show that at least in one species (c. apella), and probably in rhesus and leontopithecus, there ... | 1989 | 31964016 |
| pterygodermatites nycticebi infections in golden lion tamarins (leontopithecus rosalia rosalia) and aye-ayes (daubentonia madagascariensis) from a german zoo. | in a golden lion tamarin (leontopithecus rosalia rosalia) colony kept indoors in a german zoo, two animals presented a sudden onset of reduced general condition, lethargy, and diarrhea. at animal capture for clinical examination, adult nematode stages were observed after stress-induced defecation. despite treatment, two golden lion tamarins died in the following 2 days. at necropsy, spirurid stages were found in the lungs and intestine. additionally, adult pterygodermatites spp. were identified ... | 2020 | 33135172 |
| behavioral implications of enrichment for golden lion tamarins: a tool for ex situ conservation. | the re-release of golden lion tamarins (leontopithecus rosalia), from zoos into the wild, is considered to be an ex situ conservation success story. however, zoo-born golden lion tamarins have lower survival rates than their wild-born offspring, potentially due to deficient foraging and locomotion 'survival skills' acquired in captivity. the current study aimed to evaluate whether a puzzle feeder suspended and baited with different items could promote increased foraging and general activity in t ... | 2020 | 32841087 |
| intergroup food transfers in wild golden lion tamarins (leontopithecus rosalia). | the transfer of food between adults is uncommon in primates. although golden lion tamarins (leontopithecus rosalia) are unique among primates in the extent to which they transfer food, reports of food transfers between adults have so far been restricted to captive or reintroduced individuals. here, i report the first recorded events of adult-adult food transfers in golden lion tamarins between individuals belonging to different groups in the wild. given that individuals emigrate from their natal ... | 2020 | 32767132 |
| the role of food transfers in wild golden lion tamarins (leontopithecus rosalia): support for the informational and nutritional hypothesis. | callitrichidae is a unique primate family not only in terms of the large number of food transfers to infants but also for the prevalence of transfers that are initiated by the adults. it has been hypothesized that, as well as provisioning infants, callitrichid food transfers might function to teach the receiver what food types to eat. if food provisioning has a teaching function, we would expect successful food transfers to be more likely with food types that are novel to the juveniles. we would ... | 2020 | 32583293 |
| social contributions to the foraging behavior of young wild golden lion tamarins (leontopithecus rosalia): age-related changes and partner preferences. | in cooperatively breeding species, group members other than the parents contribute to the care of the young. the costs and benefits to caregiving may vary with the type of care provided and with caregiver characteristics such as age, sex, reproductive status, and foraging ability. here i examine the relative contributions of parents, helpers and same-aged twins to the foraging and feeding activities of the young in a longitudinal study of wild golden lion tamarins, specifically with regard to di ... | 2020 | 31552692 |
| yellow fever in brazil threatens successful recovery of endangered golden lion tamarins. | the golden lion tamarin is an endangered primate endemic to brazil's atlantic forest. centuries of deforestation reduced numbers to a few hundred individuals in isolated forest fragments 80 km from rio de janeiro city. intensive conservation action including reintroduction of zoo-born tamarins into forest fragments 1984-2000, increased numbers to about 3,700 in 2014. beginning in november 2016, southeastern brazil experienced the most severe yellow fever epidemic/epizootic in the country in 80 y ... | 2019 | 31506447 |
| estimating population sizes to evaluate progress in conservation of endangered golden lion tamarins (leontopithecus rosalia). | efforts to reverse the decline of endangered golden lion tamarin monkeys have been relatively successful because the brazilian organization dedicated to the species' conservation (associação mico-leão-dourado, amld) relies on science-based computer modeling to determine the number of tamarins necessary to achieve demographic and genetic goals, and a process of strategic planning to achieve those goals. accurate estimates of the numbers of tamarins in forest fragments are essential to evaluate pr ... | 2019 | 31166940 |
| unraveling the dispersal patterns and the social drivers of natal emigration of a cooperative breeding mammal, the golden lion tamarin. | the study of the social drivers of animal dispersal is key to understanding the evolution of social systems. among the social drivers of natal emigration, the conspecific attraction, aggressive eviction, and reduced social integration hypotheses predict that sexually mature individuals who receive more aggressive behavior and are engaged in less affiliative interactions are more likely to disperse. few reports have explored these proximate factors affecting emigration in cooperatively breeding s ... | 2019 | 30811068 |
| food-offering calls in wild golden lion tamarins (leontopithecus rosalia): evidence for teaching behavior? | many animals emit calls in the presence of food, but researchers do not always know the function of these calls. evidence suggests that adult golden lion tamarins (leontopithecus rosalia) use food-offering calls to teach juveniles which substrate (i.e., microhabitat) to forage on, or in, for food. however, we do not yet know whether juveniles learn from this aspect of the adults' behavior. here we examine whether juveniles learn to associate food-offering calls with a foraging substrate, as a st ... | 2018 | 30613117 |