metabolic bone disease resembling osteosarcoma in a wooly monkey (lagothrix lagotricha).a female pet wooly monkey with metabolic bone disease initially presented with a proliferating bony mass in the left humerus which had many features of osteosarcoma. at necropsy, parathyroid hyperplasia, osteoclastic resorption, proliferative osteoid deposition in the calvarium and cortex of long bones, and fibrous proliferation of the marrow indicated the presence of generalized osteodystrophia fibrosa. the dietary history of deficient vitamin d3 and protein and minimal exposure to sunlight sup ...1978212639
the woolly monkey (lagothrix lagothricha): a possible model for human hypertension research.the anatomical-pathological findings of 15 woolly monkeys were comparable with those described in man with essential benign or malignant hypertension. kidneys revealed arterio- and arteriolosclerosis or an onion peel-like proliferation, in some cases necrotizing endarteritis. obesity due to restricted physical activity, unnatural feeding, and psychical and physical stress could have contributed to the development of this condition. further, high vulnerability of the genus woolly monkey is postul ...19892587976
the myoglobin of primates. 4. new world monkeys: cebidae: (1) saimiri sciureus (squirrel monkey); (2) lagothrix lagothricha (humboldt's woolly monkey). callitrichidae: callithrix jacchus (common marmoset). 19734198766
[new simian hosts of plasmodium brasilianum in the state of acre, brazil: the ouacari cacajo rubicundus rubicundus, the howling monkey allouatta seniculus seniculus and the wooly-monkey lagothrix lagotricha poeppigii]. 19734200149
a study of new and old world monkeys to determine the likelihood of a simian reservoir of smallpox.the author presents data indicating that three species of new world monkeys (cebus apella, ateles paniscus, lagothrix lagothricha) are not susceptible to brazilian variola minor. although the number of animals tested was not large, no experimental evidence was obtained to suggest that these species could form a non-human reservoir for smallpox in the western hemisphere. the results also indicate that cercopithecus aethiops are not very susceptible to infection with either variola major or minor. ...19704317468
the skin of primates. xxx. the skin of the woolly monkey. (lagothrix lagotricha). 19664960296
the chromosomes of humboldt's woolly monkey (lagothrix lagothricha, humboldt 1812). 19704984813
dysphagia in a woolly monkey (lagothrix lagotricha) following a caustic esophageal burn. 19704989060
comparative and functional myology of the prehensile tail in new world monkeys.the caudal myology of prehensile-tailed monkeys (cebus apella, alouatta palliata, alouatta seniculus, lagothrix lagotricha, and ateles paniscus) and nonprehensile-tailed primates (eulemur fulvus, aotus trivirgatus, callithrix jacchus, pithecia pithecia, saimiri sciureus, macaca fascicularis, and cercopithecus aethiops) was examined and compared in order to identify muscular differences that correlate with osteological features diagnostic of tail prehensility. in addition, electrophysiological st ...19957595958
primate phylogeny studied by comparative determinant analysis. a preliminary this preliminary report the divergence times for the major primate groups are given, calculated from a study by comparative determinant analysis of 69 proteins (equaling 0.1% of the whole genetic information). with an origin of the primate order set at 80 million years before present, the ages of the last common ancestors (lcas) of man and the major primate groups obtained this way are as follows: pan troglodytes 5.2; gorilla gorilla 7.4; pongo pygmaeus 19.2; hylobates lar 20.3; old world mon ...19938398202
isolation of a hepadnavirus from the woolly monkey, a new world primate.hepatitis b virus (hbv) infections are a major worldwide health problem with chronic infections leading to cirrhosis and liver cancer. viruses related to human hbv have been isolated from birds and rodents, but despite efforts to find hepadnaviruses that infect species intermediate in evolution between rodents and humans, none have been described. we recently isolated a hepadnavirus from a woolly monkey (lagothrix lagotricha) that was suffering from fulminant hepatitis. phylogenetic analysis of ...19989576957
outbreak of toxoplasmosis in lagothrix lagotricha. 199910567835
locomotion and posture in lagothrix lagotricha.this long-term study of woolly monkey (lagothrix) locomotor and postural behaviour employs methods identical to those used during a previous study of the locomotion and posture of two species of ateles, allowing a detailed comparison between the two genera, which are strong competitors in extensive parts of the amazon basin and northern andes. as in ateles, lagothrix locomotion can be divided into five patterns, based on limb usage: quadrupedal walking and running, suspensory locomotion, climbin ...199910640881
fibrillary glomerulonephritis and pulmonary haemorrhage in a woolly monkey (lagothrix lagotricha).fibrillar deposits, distinct from amyloid deposits, were demonstrated by electron microscopy in the glomeruli and lung of an amazonian woolly monkey (lagothrix lagotricha) which had died with extensive pulmonary haemorrhage. the renal lesions were typical of fibrillary glomerulonephritis in man, and igg deposition was also demonstrated in the kidney. the association of renal and pulmonary lesions has been reported previously in man, but this is the first report of fibrillary glomerulonephritis, ...200010684690
reciprocal chromosome painting between a new world primate, the woolly monkey, and humans.we employed fluorescence-activated chromosome sorting (facs) to construct chromosome paint sets for the woolly monkey (lagothrix lagotricha) and then fish to reciprocally paint human and woolly monkey metaphases. reciprocal chromosome painting between humans and the woolly monkey allowed us to assign subchromosomal homologies between these species. the reciprocal painting data between humans and the woolly monkey also allow a better interpretation of the chromosomal difference between humans and ...200111321373
locomotor behavior of lagothrix lagothricha and ateles belzebuth in yasuní national park, ecuador: general patterns and nonsuspensory modes.field study of the locomotor behavior of sympatric woolly monkeys (lagothrix lagothricha) and spider monkeys (ateles belzebuth) in undisturbed rainforest of northern ecuador revealed similar patterns in use of plant forms (categorized tree and liana structure), and substantial differences in the frequencies of use of different grouped modes (aggregates of kinematically similar specific modes). lagothrix progressed more than ateles by leaping/dropping and quadrupedal walking/running, whereas atel ...200111437524
ranging behavior and foraging ecology of lowland woolly monkeys (lagothrix lagotricha poeppigii) in yasuní national park, a year-long study, i investigated the ranging behavior of lowland woolly monkeys (lagothrix lagotricha poeppigii) in a terra firma rainforest in yasuní national park, ecuador, and examined the relationship between ranging, diet, food availability, and food patch use for this population. in yasuní the total home range sizes for two social groups were 124 and 108 ha, which are much smaller than has been reported previously for lagothrix elsewhere in its geographic distribution. the mean yearly ...200312619047
postcentral and superior parietal regions of cerebral cortex in humboldt's woolly monkey. 196514275573
phosphatase activity in the limb bones of monkeys (lagothrix humboldti) with hyperparathyroidism.the paper reports a study of the distribution of phosphatases in the femora of three specimens of humboldt's woolly monkey (lagothrix humboldti) suffering from chronic hyperparathyroidism. bone structure ranged from the apparently normal to extreme osteitis fibrosa. most marked changes were found in the distribution of alkaline phosphatase, which reached at least 10 times the normal levels in the bone of the second monkey in the series, dropping to levels still well above normal in that of the m ...196214451521
footfall patterns, stride length and speed of vertical climbing in spider monkeys (ateles fusciceps robustus) and woolly monkeys (lagothrix lagotricha).vertical climbing is central to theories surrounding the locomotor specialisations of large primates. in this paper, we present spatiotemporal gait parameters obtained from video recordings of captive spider monkeys (ateles fusciceps robustus) and woolly monkeys (lagothrix lagotricha) in semi-natural enclosures, with the aim of discovering the influence of body weight and differences in general locomotor behaviour on vertical climbing kinematics on various substrates. results show that there are ...200415240978
evolution of an intronic microsatellite polymorphism in toll-like receptor 2 among primates.nonhuman primates express varying responses to mycobacterium tuberculosis: new world monkeys appear to be resistant to tuberculosis (tb) while old world monkeys seem to be particularly susceptible. the aim of this study was to elucidate the presence of the regulatory guanine-thymine (gt) repeat polymorphisms in intron 2 of toll-like receptor 2 (tlr2) associated with the development of tb in humans and to determine any variations in these microsatellite polymorphisms in primates. we sequenced the ...200616912902
application of assays for the diagnosis of toxoplasmosis in a colony of woolly monkeys (lagothrix lagotricha).toxoplasma gondii infection is a common cause of morbidity and mortality in new world primate species. clinical abnormalities associated with toxoplasmosis can be nonspecific, making it difficult to make a definitive antemortem diagnosis and initiate appropriate treatment. toxoplasmosis in new world primates can have a rapid clinical course, which may lessen the diagnostic utility of antemortem tests. however, while there are a variety of t. gondii serum antibody tests and t. gondii polymerase c ...200617319125
serum chemistry concentrations of captive woolly monkeys (lagothrix lagotricha).woolly monkeys (lagothrix sp.) are threatened species and numerous zoos have failed to sustain successful populations. the most common causes of death in captive woolly monkeys are related to pregnancy and hypertension. the objective of this retrospective study was to evaluate serum concentrations of a large number of captive woolly monkeys to establish baseline means and compare these concentrations with their closest related species to determine potential abnormalities. serum analyses from 30 ...200819360617
diversity of regenerating plants and seed dispersal in two canopy trees from colombian amazon forests with different hunting pressure.hunting may have drastic effects on some populations of frugivores and seed dispersal agents, which in turn may affect patterns of forest regeneration and plant diversity. however, when a species disappears, it is possible that the population of other species increases due to competition release, compensating or not, their ecological roles. the main aim of this study was to measure density compensation in primate communities, their possible effects on seedling and sapling diversity, and compensa ...200819419062
the transmission of yellow fever : experiments with the "woolly monkey" (lagothrix lago-tricha humboldt), the "spider monkey" (ateleus ater f. cuvier), and the "squirrel monkey" (saimiri scireus linnaeus).1. saimiri sciureus has been infected with yellow fever virus, both by the inoculation of infectious blood and by the bites of infective mosquitoes. some of the monkeys have died, showing lesions, including hepatic necrosis, suggesting yellow fever as seen in human beings and in rhesus monkeys. virus has been transferred back to m. rhesus from infected saimiri both by blood inoculation and by mosquito bites. the virus undoubtedly has been maintained through four direct passages in saimiri. reino ...193019869721
identification of human specific gene duplications relative to other primates by array cgh and quantitative order to identify human lineage specific (hls) copy number differences (cnds) compared to other primates, we performed pair wise comparisons (human vs. chimpanzee, gorilla and orangutan) by using cdna array comparative genomic hybridization (cgh). a set of 23 genes with hls duplications were identified, as well as other lineage differences in gene copy number specific of chimpanzee, gorilla and orangutan. each species has gained more copies of specific genes rather than losing gene copies. el ...201020153417
how many species of woolly monkeys inhabit colombian forests?there is a controversy regarding how many species the genus lagothrix contains, since the lagothrix lagothricha subspecies have been recently proposed to be actual species. clarification of species status is of particular importance in the case of l. l. lugens, because it is the most endangered and its distribution is restricted to the colombian andes, a highly deforested region. using cytogenetic and molecular markers, we obtained evidence indicating that the subspecies status is appropriate fo ...201020815013
synteny of human chromosomes 14 and 15 in the platyrrhines (primates, platyrrhini).in order to study the intra- and interspecific variability of the 14/15 association in platyrrhini, we analyzed 15 species from 13 genera, including species that had not been described yet. the dna libraries of human chromosomes 14 and 15 were hybridized to metaphases of alouatta guariba clamitans, a. caraya, a. sara, ateles paniscus chamek, lagothrix lagothricha, brachyteles arachnoides, saguinus midas midas, leontopithecus chrysomelas, callimico goeldii, callithrix sp., cebus apella, aotus nig ...200921637455
fructosamine reference ranges in rhesus macaques (macaca mulatta).naturally occurring diabetes mellitus (dm) is common in several species of old and new world nonhuman primates. fructosamine values provide important information about recent glycemic control and can be useful in the diagnosis and management of dm. however, despite an abundance of reports in the literature describing spontaneous and induced dm in monkeys, few reference ranges are available for fructosamine. reference ranges have been published for woolly monkeys (lagothrix lagotricha), cynomolgu ...201121838972
species association of hepatitis b virus (hbv) in non-human apes; evidence for recombination between gorilla and chimpanzee variants.hepatitis b virus (hbv) infections are widely distributed in humans, infecting approximately one third of the world's population. hbv variants have also been detected and genetically characterised from old world apes; gorilla gorilla (gorilla), pan troglodytes (chimpanzee), pongo pygmaeus (orang-utan), nomascus nastusus and hylobates pileatus (gibbons) and from the new world monkey, lagothrix lagotricha (woolly monkey). to investigate species-specificity and potential for cross species transmiss ...201222432021
role of the prehensile tail during ateline locomotion: experimental and osteological evidence.the dynamic role of the prehensile tail of atelines during locomotion is poorly understood. while some have viewed the tail of ateles simply as a safety mechanism, others have suggested that the prehensile tail plays an active role by adjusting pendulum length or controlling lateral sway during bimanual suspensory locomotion. this study examines the bony and muscular anatomy of the prehensile tail as well as the kinematics of tail use during tail-assisted brachiation in two primates, ateles and ...200515386296
nutrient transport within and between habitats through seed dispersal processes by woolly monkeys in north-western amazonia.the contribution of vertebrate animals to nutrient cycling has proven to be important in various ecosystems. however, the role of large bodied primates in nutrient transport in neotropical forests is not well documented. here, we assess the role of a population of woolly monkeys (lagothrix lagothricha lugens) as vectors of nutrient movement through seed dispersal. we estimated total seed biomass transported by the population within and between two habitats (terra firme and flooded forests) at ti ...201020549712
human-nonhuman primate interactions amongst tikuna people: perceptions and local initiatives for resource management in amacayacu in the colombian amazon.this study assesses the impact of hunting on the densities of nonhuman primates in two indigenous tikuna territories (mocagua and san martín), overlapping amacayacu national park in the colombian amazon. large-bodied primates were once favored prey by tikunas, but are now rarely hunted owing to the diminishing primate populations. we evaluate the effect of a hunting ban on woolly monkeys (lagothrix lagothricha) by the residents of mocagua, using qualitative and quantitative methods. hunting reco ...201020186745
evaluation of diabetes determinants in woolly monkeys (lagothrix lagotricha).woolly monkeys (lagothrix lagotricha) are a threatened specie in the wild with limited successful management in captivity due to diagnosed hypertension and suspected diabetic conditions. six woolly monkeys with known hypertension problems were tested to determine if diabetes mellitus and current daily diet are underlying links to health problems for the captive population of this species. blood and urine were collected and serum was analysed for fructosamine, glucose, glycated haemoglobin, insul ...200717988352
merkel cell polyomavirus infection of animal dermal fibroblasts.merkel cell polyomavirus (mcpyv) is the first polyomavirus to be associated with human cancer. mechanistic studies attempting to fully elucidate mcpyv oncogenic mechanisms have been hampered by the lack of animal models for mcpyv infection. in this study, we examined the infectability of mcpyv-gfp pseudovirus, mcpyv recombinant virion, and several mcpyv chimeric viruses in dermal fibroblasts isolated from various model animals, including mouse (mus musculus), rabbit (oryctolagus cuniculus), rat ...201729167345
the sustainability of subsistence hunting by matsigenka native communities in manu national park, peru.the presence of indigenous people in tropical parks has fueled a debate over whether people in parks are conservation allies or direct threats to biodiversity. a well-known example is the matsigenka (or machiguenga) population residing in manu national park in peruvian amazonia. because the exploitation of wild meat (or bushmeat), especially large vertebrates, represents the most significant internal threat to biodiversity in manu, we analyzed 1 year of participatory monitoring of game offtake i ...200717883483
scent marking in two western amazonian populations of woolly monkeys (lagothrix lagotricha).we describe patterns of scent marking observed in two wild populations of lowland woolly monkeys that were the subjects of long-term studies in the westernmost portion of the amazon basin. the woolly monkeys engaged primarily in two types of scent marking: chest rubbing and anogenital rubbing. in both study populations, males and females performed both types of scent marking, but males chest-rubbed more commonly than females, while females engaged in more anogenital rubbing. we evaluated two non ...200616715512
chromosome territory positioning of conserved homologous chromosomes in different primate species.interphase chromosomes form distinct spatial domains called chromosome territories (cts). the position of cts is known not to be at random and is related to chromosome size and gene density. to elucidate how cts are arranged in primate proliferating fibroblasts and whether the radial position of cts has been conserved during primate evolution, several specific cts corresponding to conserved chromosomes since the simiiformes (human 6, 12, 13, and 17 homologous cts) have been studied in 3d preserv ...200616607509
constitutive heterochromatin polymorphism in lagothrix lagothricha cana, cebus apella, and cebus capucinus.we describe the c-bands in the karyotypes of lagothrix lagothricha cana, cebus apella and cebus capucinus. the c-banding patterns show both a high degree of polymorphism as well as the presence of terminal and interstitial c-bands. varying amounts of heterochromatin result in dimorphism of some chromosome pairs. the high incidence of chromosome rearrangements found in the cebidae may be due to the presence of terminal and interstitial c-bands.198331991965
investigation of marmoset hybrids (cebuella pygmaea x callithrix jacchus) and related callitrichinae (platyrrhini) by cross-species chromosome painting and comparative genomic hybridization.we report on the cytogenetics of twin offspring from an interspecies cross in marmosets (callitrichinae, platyrrhini), resulting from a pairing between a female common marmoset (callithrix jacchus, 2n = 46) and a male pygmy marmoset (cebuella pygmaea, 2n = 44). we analyzed their karyotypes by multi-directional chromosome painting employing human, saguinus oedipus and lagothrix lagothricha chromosome-specific probes. both hybrid individuals had a karyotype with a diploid chromosome number of 2n = ...200515545729
phylogenetic inferences of atelinae (platyrrhini) based on multi-directional chromosome painting in brachyteles arachnoides, ateles paniscus paniscus and ateles b. marginatus.we performed multi-directional chromosome painting in a comparative cytogenetic study of the three atelinae species brachyteles arachnoides, ateles paniscus paniscus and ateles belzebuth marginatus, in order to reconstruct phylogenetic relationships within this platyrrhini subfamily. comparative chromosome maps between these species were established by multi-color fluorescence in situ hybridization (fish) employing human, saguinus oedipus and lagothrix lagothricha chromosome-specific probes. the ...200515545728
a survey for helminth parasites in feral new world non-human primate populations and its comparison with parasitological data from man in the region.a survey for helminth parasites in feral new world non-human primates was conducted and compared with parasitological data from man in the region. a total of 835 fecal samples were collected from feral aotus nancymae, a. vociferans, saguinus labiatus, s. mystax, saimiri boliviensis peruviensis, s. sciureus macrodon, lagothrix lagotricha and cacajao calvus rubicundus. in addition, adult parasites were collected from necropsies performed on monkeys that died during quarantine and in captivity. hel ...200314641789
suspensory locomotion of lagothrix lagothricha and ateles belzebuth in yasuní national park, ecuador.a comparative field study of the locomotion of woolly monkeys (lagothrix lagothricha) and spider monkeys (ateles belzebuth) in undisturbed rainforest of northeastern ecuador reveals substantial differences in their use of suspensory modes. ateles performed both more brachiation (by forelimbs and tail, with trunk rotation), and forelimb swing (similar to brachiation, but without trunk rotation) than lagothrix. in contrast, in lagothrix 20% of suspensory movement was by pronograde forelimb swing, ...200312799159
aspects of the ranging pattern in a group of wild woolly monkeys (lagothrix lagothricha).a group of woolly monkeys (lagothrix lagothricha), studied for 1,800 hr from june 1984 until september 1987 in the eastern colombian amazon, used a home range of about 760 ha, 90% of which overlapped the ranges of three other groups. home range use varied throughout the year, correlating in part with variations in fruit production. the home range exhibited a nonexclusive "core area" in the floristically most diverse part of the home range, although the majority of the home range was entered at a ...199631918484
rflp analysis of mtdna from six platyrrhine genera: phylogenetic inferences.this study investigates the phylogenetic relationships of 10 species of platyrrhine primates using rflp analysis of mtdna. three restriction enzymes were used to determine the restriction site haplotypes for a total of 276 individuals. phylogenetic analysis using maximum parsimony was employed to construct phylogenetic trees. we found close phylogenetic relationships between alouatta, lagothrix and ateles. we also found a close relationship between cebus and aotus, with saimiri clustering with t ...200312759493
the phylogeny of howler monkeys (alouatta, platyrrhini): reconstruction by multicolor cross-species chromosome painting.we performed multidirectional chromosome painting in a comparative cytogenetic study of the three howler monkey species alouatta fusca, a. caraya and a. seniculus macconnelli (atelinae, platyrrhini) in order to reconstruct phylogenetic relationships within this genus. comparative genome maps between these species were established by multicolor fluorescence in-situ hybridization (fish) employing human, saguinus oedipus and lagothrix lagothricha chromosome-specific probes. the three species includ ...200212575795
molecular cytotaxonomy of new world monkeys (platyrrhini) - comparative analysis of five species by multi-color chromosome painting gives evidence for a classification of callimico goeldii within the family of callitrichidae.chromosome rearrangements are considered as "rare genomic changes" and can provide useful markers and even landmarks for reconstructing phylogenies complementary to dna sequence data and bio-morphological comparisons. here, we applied multi-directional chromosome painting to reconstruct the chromosome phylogeny and evolutionary relationships among the new world monkey (platyrrhini) species callithrix argentata, cebuella pygmaea, saguinus oedipus, callithrix jacchus and callimico goeldii. the res ...200111856883
abundance, diversity, and patterns of distribution of primates on the tapiche river in amazonian peru.this work presents data on the relative diversity, abundance, and distribution patterns of primates in a 20 km2 area of the tapiche river in the peruvian amazon. population data were collected while the study area was both inundated and dry (march to september 1997) using conventional line-transect census techniques. survey results reflected the presence of 11 primate species, but population parameters on only eight of the species will be presented, including saddleback tamarins (saguinus fuscic ...200111376449
seed dispersal by woolly monkeys (lagothrix lagothricha) at tinigua national park, colombia: dispersal distance, germination rates, and dispersal quantity.the purpose of this study was to describe seed dispersal patterns of woolly monkeys (lagothrix lagothricha) in terms of dispersal quantity and two factors related to dispersal quality: germination rates of dispersed seeds and the distance of dispersal to parental trees. the possible influence of retention time, travel distance, seed size, activity patterns, and fruit abundance on dispersal distance was also analyzed. observations on activity, diet, daily movements, and seed dispersal were made o ...200010768351
pendular motion in the brachiation of captive lagothrix and ateles.pendular motion during brachiation of captive lagothrix lagothricha lugens and ateles fusciceps robustus was analyzed to demonstrate similarities, and differences, between these two closely related large bodied atelines. this is the first captive study of the kinematics of brachiation in lagothrix. videorecordings of one adult male of each species were made in a specially designed cage constructed at the dumond conservancy/monkey jungle, miami, fl. java software (jandel scientific inc., san rafa ...199910402035
the use of high resolution banding in comparative cytogenetics: comparison between man and lagothrix lagotricha (cebidae).new techniques for obtaining high resolution banding are used in comparative cytogenetics. they make possible a direct comparison of the chromosomes of two distantly related primates, man and lagothrix lagotricha (platyrrhine). for many chromosomes, the homoeologies of banding are surprisingly clear. these new results strongly strengthen the interpretations proposed with the use of more conventional banding techniques.19806771104
spontaneous hypertension and its sequelae in woolly monkeys (lagothrix lagotricha).arteriolar nephrosclerosis was observed at necropsy in 26 of 38 woolly monkeys (lagothrix lagotricha). this lesion is the earliest histologic change associated with hypertension in humans. seventeen of the monkeys had died of congestive heart failure, renal failure or acute cardiovascular accident, complications similar to those seen in human hypertension. all monkeys known to be over 4 years of age were affected. direct blood pressure measurements in nine otherwise healthy woolly monkeys reveal ...19873437751
functional morphology of forelimb joints in the woolly monkey lagothrix lagothricha.this gross anatomical study of embalmed forelimb joints of the south american woolly monkey lagothrix lagothricha focuses on the problem of determining in osteoligamentous preparations how the disposition of the capsular apparatus and the geometry of the articular surfaces govern the amount and types of movement permitted at a joint, and then correlates these findings with the use of the forelimb in the positional capabilities of captive wooly monkeys observed by this author. data collection was ...197895920
pulp-seed attachment is a dominant variable explaining legitimate seed dispersal: a case study on woolly monkeys.seed dispersal is a mutualistic interaction in which frugivores gain nutrients and plants gain when seeds are transported to adequate places for establishment. however, this relationship is prone to deceit, for example, when frugivores spit-out seeds in the proximity of parental trees. still, few hypotheses have offered explanations on why deceiving strategies are not widespread. in this study, i explore the importance of how difficult it is to mechanically separate the nutritious pulp from the ...201121298393
initiation of feeding by four sympatric neotropical primates (ateles belzebuth, lagothrix lagotricha poeppigii, plecturocebus (callicebus) discolor, and pithecia aequatorialis) in amazonian ecuador: relationships to photic and ecological factors.we examined photic and ecological factors related to initiation of feeding by four sympatric primates in the rain forest of amazonian ecuador. with rare exceptions, morning activities of all taxa began only after the onset of nautical twilight, which occurred 47-48 min before sunrise. the larger spider and woolly monkeys, ateles belzebuth and lagothrix lagotricha poeppigii, left their sleeping trees before sunrise about half the time, while the smaller sakis and titi monkeys, pithecia aequatoria ...201930673746
invalidation of taxa within the silvery wooly monkey (lagothrix lagothricha poeppigii, atelidae, primates).the systematics of the humboldt's wooly monkeys (l. lagothricha; atelidae) is essential to preserve this neotropical primate species. traditionally, four morphological subspecies have been described, which recently have been molecularly confirmed. however, no population genetics studies have been carried out throughout the geographical distribution of one of these subspecies, lagothrix lagothricha poeppigii. for this reason, we analyzed nine mitochondrial genes of l. l. poeppigii mainly collecte ...202032329402
first molecular phylogenetic analysis of the lagothrix taxon living in southern peru and northern bolivia: lagothrix lagothricha tschudii (atelidae, primates), a new subspecies.we sequenced mitochondrial coi and coii genes (1,377 base pairs) of 166 woolly monkeys (lagothrix) to determine the phylogenetic relationships of tschudii in reference to the other taxa within the genus lagothrix, to provide the first genetic diversity level estimates for tschudii, and to reconstruct the historical demographic evolution of this taxon. the sample set included, for the first time, 10 individuals of the elusive tschudii taxon sensu groves from southern peru and northern bolivia. ou ...201931079105
influence of arthropod and fruit abundance on the dietary composition of highland colombian woolly monkeys (lagothrix lagotricha lugens).the woolly monkey's (lagothrix lagotricha) diet consists primarily of fruits, and for some populations fruit availability predicts its frequency in the diet. woolly monkeys also eat new leaves, flowers, seeds and arthropods, but it is unclear whether arthropods are consumed in proportion to their environmental availability. we tested the hypothesis that arthropod consumption by woolly monkeys depends on availability. we studied a group of woolly monkeys for 10 months in 2013-2014, in cueva de lo ...201931067556
chest-rubbing in captive woolly monkeys (lagothrix lagotricha).the correlates of chest-rubbing were studied in a captive group of woolly monkeys (lagothrix lagotricha) to assess possible functions of territorial marking, spacing among competing groups or competing males, reproductive communication, marking to identify familiar environments, selfanointing, and displacement activity. chest-rubbing was observed only in sexually mature monkeys and was a predominantly male activity. females increased chest-rubbing when the original adult male died. chest-rubbing ...200030545169
ecological strategies of woolly monkeys (lagothrix lagotricha) at tinigua national park, colombia.information on the use of space, activity patterns, diet, and social interactions were recorded for a group of woolly monkeys (lagothrix lagotricha) during 13 months at tinigua national park, macarena, colombia. in this region, fruit abundance changes throughout the year with a peak during march-april (beginning of the rainy season) and less fruit during september-november (end of rainy season). woolly monkeys spent most of their time in mature forest where fruit abundance is higher than in open ...199431936910
evidence for insectivory in two primate species (callicebus torquatus lugens and lagothrix lagothricha lagothricha) from northwestern amazonia.insects were recovered and identified from stomach contents of two callicebus torquatus lugens and one lagothrix lagothricha lagothricha collected in a remote area of northwestern amazonia. both c. torquatus lugens showed little insect matter in stomach contents. conversely, a minimum of 133 individual insects were recovered from stomach contents of the l. lagothricha lagothricha. these included various larger, rapid forms (cicadellidae) unlikely to have been inadvertently consumed while the ani ...198432160720
inferring the use of forelimb suspensory locomotion by extinct primate species via shape exploration of the ulna.uncovering links between skeletal morphology and locomotor behavior is an essential component of paleobiology because it allows researchers to infer the locomotor repertoire of extinct species based on preserved fossils. in this study, we explored ulnar shape in anthropoid primates using 3d geometric morphometrics to discover novel aspects of shape variation that correspond to observed differences in the relative amount of forelimb suspensory locomotion performed by species. the ultimate goal of ...201525234204
fruits eaten by woolly monkeys (lagothrix lagothricha) at local and regional scales.woolly monkeys are endangered new world primates whose natural ecological requirements are known from few sites. this study aimed to investigate the diet of woolly monkeys (lagothrix lagothricha, atelidae) to examine how availability determines fruit choice at local and regional scales. we followed two groups of woolly monkeys in the mosiro itajura-caparú biological station in the colombian amazon for 16 months, and then compared our observations with previous studies for this and other sites in ...201626910234
activity budget and social interactions in semi-captive gray woolly monkeys (lagothrix lagotricha cana) living in an ex situ conservation area in central amazonia.areas holding primates in semi-captivity conditions represent an excellent opportunity for collecting data on rare, little known, and endangered taxa, contributing with insightful information to help in their conservation. here, we present information on the activity budget and social interactions of the elusive gray woolly monkeys, lagothrix lagotricha cana, in an ex situ conservation area in central amazonia. we studied the behavior of 18 semi-captive individuals through instantaneous scan and ...201728186699
predation risk sensitivity and the spatial organization of primate groups: a case study using gis in lowland woolly monkeys (lagothrix lagotricha poeppigii).predation risk is thought to be a potent force influencing intragroup cohesion, and the level of risk experienced by an individual is expected to vary with both group size and spatial position within a group. smaller-bodied and less-experienced individuals are presumed to be more vulnerable to predators, suggesting that within-group spatial organization should show size- and age-dependent patterns in predator sensitive positioning. however, such effects have been difficult to evaluate for arbore ...201525209572
a primer on the phylogeography of lagothrix lagotricha (sensu fooden) in northern south america.the taxonomic history of the genus lagothrix is complex, with molecular and morphological assessments giving conflicting results for the separation between its taxa. phylogeographic studies of the most widely distributed species, lagothrix lagotricha, have only been attempted recently and are limited to few individuals per collection site, many of which were captive making their geographical origin dubious. there is debate regarding the possibility of raising subspecies of lagothrix lagotricha t ...201524905154
evolutionary renovation of l/m opsin polymorphism confers a fruit discrimination advantage to ateline new world world monkeys exhibit prominent colour vision variation due to allelic polymorphism of the long-to-middle wavelength (l/m) opsin gene. the known spectral variation of l/m opsins in primates is broadly determined by amino acid composition at three sites: 180, 277 and 285 (the 'three-sites' rule). however, two l/m opsin alleles found in the black-handed spider monkeys (ateles geoffroyi) are known exceptions, presumably due to novel mutations. the spectral separation of the two l/m photopigment ...201424612406
bimodal evolution of the killer cell ig-like receptor (kir) family in new world primates.the immunoglobulin-like receptor (kir) gene family in new world primates (platyrrhini) has been characterized only in the owl monkey (aotus sp.). to gain a better understanding of the kir system in platyrrhini, we analyzed a kir haplotype in ateles geoffroyi, and sequenced kir complementary dnas (cdnas) from other three atelidae species, ateles hybridus, ateles belzebuth, and lagothrix lagotricha. atelidae expressed a variable set of activating and inhibitory kirs that diversified independently ...201323846852
the ethnoprimatology of the maijuna of the peruvian amazon and implications for primate amazonia, primates are not only an important food source but they also hold significant cultural and symbolic value for many indigenous groups. we document the relationship between primates and community members of the maijuna indigenous community of sucusari in the peruvian amazon and describe how ethnoprimatological studies provide a better understanding of the significance of primates in people's lives. additionally, we explore how ethnoprimatological studies can help inform and enhance pr ...201829514692
high-resolution chromosome banding studies in cebus apella, cebus albifrons, and lagothrix lagothricha: comparison with the human karyotype.karyotypes of three species of south american primates (cebus apella, cebus albifrons, and lagothrix lagothricha) were studied using high-resolution banding techniques, and were compared to the human karyotype. the number of homologies was very high for the three species. some of the breakpoints implicated in chromosome rearrangements corresponded with human fragile sites. the fragile sites in human chromosomes often correspond with the localization of latent centromeres in the platyrrhines or w ...198731973485
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