| genetic comparison between different populations of eulemur macaco flavifrons in northwest madagascar using rapd markers. | eulemur macaco flavifrons, the sclater's black lemur, is a critically endangered subspecies of northwest madagascar, which is not yet protected by any reserve. in order to study the feasibility of creating such a reserve, an area of outstanding biological importance was selected in the region of maromandia-sahamalaza, which is probably the only remaining place which would permit the long-term survival of the sclater's black lemur. to determine if genetic management is needed for the sahamalaza b ... | 2000 | 10941441 |
| molecular and serologic evidence of tick-borne ehrlichiae in three species of lemurs from st. catherines island, georgia, usa. | in recent years, several species of ehrlichiae have been recognized as tick-borne disease agents of veterinary and medical importance. clinically normal free-ranging or previously free-ranging lemurs, including 46 ring-tailed lemurs (lemur catta), six blue-eyed black lemurs (eulemur macaco flavifrons), and four black and white ruffed lemurs (varecia variegata variegata) from st. catherines island, georgia, were tested for evidence of exposure to tick-borne ehrlichiae. all 52 adult lemurs were se ... | 2004 | 15732591 |
| asymptomatic enterocytozoon bieneusi microsporidiosis in captive mammals. | human microsporidiosis, a serious disease of immunocompetent and immunosuppressed people, can be due to zoonotic transmission of microsporidian spores. a survey utilizing chromotrope 2r stain and fluorescent in situ hybridization techniques for testing feces from 193 captive mammals demonstrated that 3 animals (1.6%) shed encephalitozoon bieneusi spores. these include two critically endangered species (i.e., black lemurs, eulemur macaco flavifrons; and visayan warty pig, sus cebifrons negrinus) ... | 2007 | 17016723 |
| seroprevalence of toxoplasma gondii, sarcocystis neurona, and encephalitozoon cuniculi in three species of lemurs from st. catherines island, ga, usa. | in the current study, we determined the seroprevalence of toxoplasma gondii, sarcocystis neurona, and encephalitozoon cuniculi in three species of lemurs from st. catherines island, georgia. serum samples were tested from 52 ring-tailed lemurs (lemur catta), six blue-eyed black lemurs (eulemur macaco flavifrons), and four black and white ruffed lemurs (varecia variegata variegata) using an agglutination assay. three ring-tailed lemurs (5.8%) were positive for t. gondii (titer of 1:50); one ring- ... | 2007 | 17052854 |
| trypanosoma cruzi prevalence and epidemiologic trends in lemurs on st. catherines island, georgia. | lemurs on st. catherines island, georgia were tested for trypanosoma cruzi infection to develop a better understanding of the epizootiology of the parasite in nonhuman primates in the southeastern united states. fifty-six ring-tailed (lemur catta), blue-eyed black (eulemur macaco flavifrons), and black-and-white ruffed (varecia variegata variegata) lemurs were tested by hemoculture and serology to determine the prevalence of t. cruzi in the population. of those tested 3 (5%) were identified as c ... | 2007 | 17436947 |
| seroepidemiology of toxoplasma gondii in zoo animals in selected zoos in the midwestern united states. | toxoplasma gondii infections in zoo animals are of interest because many captive animals die of clinical toxoplasmosis and because of the potential risk of exposure of children and elderly to t. gondii oocysts excreted by cats in the zoos. seroprevalence of t. gondii antibodies in wild zoo felids, highly susceptible zoo species, and feral cats from 8 zoos of the midwestern united states was determined by using the modified agglutination test (mat). a titer of 1:25 was considered indicative of t. ... | 2008 | 18605803 |
| blue eyes in lemurs and humans: same phenotype, different genetic mechanism. | almost all mammals have brown or darkly-pigmented eyes (irises), but among primates, there are some prominent blue-eyed exceptions. the blue eyes of some humans and lemurs are a striking example of convergent evolution of a rare phenotype on distant branches of the primate tree. recent work on humans indicates that blue eye color is associated with, and likely caused by, a single nucleotide polymorphism (rs12913832) in an intron of the gene herc2, which likely regulates expression of the neighbo ... | 2009 | 19278018 |
| maintenance of female dominance in blue-eyed black lemurs (eulemur macaco flavifrons) and gray bamboo lemurs (hapalemur griseus griseus) under semi-free-ranging and captive conditions. | several species of malagasy prosimians are characterized by female dominance, an unusual trait among mammals. we compare the extent to which female dominance is displayed and the mechanisms that are used to maintain dominance in the frugivorous blue-eyed black lemurs (eulemur macaco flavifrons) and the folivorous gray bamboo lemurs (hapalemur griseus griseus) housed at the duke lemur center. all dominant-submissive interactions were recorded during 448 hr of focal animal observations. both speci ... | 2007 | 19360585 |
| [animal reservoirs of human virulent microsporidian species]. | the main objective of the present study was to determined the occurrence of encephalitozoon intestinalis, e. hellem, e. cuniculi, and enterocytozoon bieneusi in poland in animal faecal using the fish (fluorescent in situ hybridization) and multiplex fish techniques. additional objectives included: (1) identification of animal hosts of microsporidia that are infectious to humans amongst free-ranging, captive, livestock and domestic animals; (2) a molecular analysis of randomly selected parasite i ... | 2009 | 19579789 |
| a 12-month survey of gastrointestinal helminth infections of lemurs kept in two zoos in madagascar. | infections with gastrointestinal parasites may be a major threat to lemurs kept in captivity, as they are a common cause of diarrhea. in this study, fecal egg count patterns and clinical signs associated with gastrointestinal nematodes were assessed for 12 mo in 40 lemurs kept under different husbandry and climatic conditions at two sites in madagascar. involved species were black-and-white ruffed lemurs (varecia variegata), eastern grey bamboo lemurs (hapalemur griseus), greater bamboo lemurs ( ... | 2010 | 21370644 |
| visual acuity in the cathemeral strepsirrhine eulemur macaco flavifrons. | studies of visual acuity in primates have shown that diurnal haplorhines have higher acuity (30-75 cycles per degree (c/deg)) than most other mammals. however, relatively little is known about visual acuity in non-haplorhine primates, and published estimates are only available for four strepsirrhine genera (microcebus, otolemur, galago, and lemur). we present here the first measurements of visual acuity in a cathemeral strepsirrhine species, the blue-eyed black lemur (eulemur macaco flavifrons). ... | 2009 | 19180555 |
| evolutionary history inferred from the de novo assembly of a nonmodel organism, the blue-eyed black lemur. | lemurs, the living primates most distantly related to humans, demonstrate incredible diversity in behaviour, life history patterns and adaptive traits. although many lemur species are endangered within their native madagascar, there is no high-quality genome assembly from this taxon, limiting population and conservation genetic studies. one critically endangered lemur is the blue-eyed black lemur eulemur flavifrons. this species is fixed for blue irises, a convergent trait that evolved at least ... | 2015 | 26198179 |
| life history traits, maternal behavior and infant development of blue-eyed black lemurs (eulemur flavifrons). | an understanding of recruitment is important for estimating population growth and viability, and their implications for conservation. we present the first results regarding the life history, maternal behavior and infant development of the critically endangered blue-eyed black lemur (eulemur flavifrons) of madagascar. the species breeds seasonally, with births occurring at the end of the dry season, between late august and october. over two successive birth seasons in 2006 and 2007, we observed a ... | 2011 | 21254191 |
| a population estimate of blue-eyed black lemurs in ankarafa forest, sahamalaza-iles radama national park, madagascar. | the critically endangered blue-eyed black lemur (eulemur flavifrons) has one of the smallest distributions of any lemur, occurring only in the north-western forests of madagascar. we report the results of a population estimate of this taxon in part of the ankarafa forest, sahamalaza-iles radama national park, a dry deciduous forest. we collected data between september 2007 and february 2008 using a total count method with marked individuals and known groups. in all, 228 individuals comprising 29 ... | 2010 | 21242696 |
| lemurs and macaques show similar numerical sensitivity. | we investigated the precision of the approximate number system (ans) in three lemur species (lemur catta, eulemur mongoz, and eulemur macaco flavifrons), one old world monkey species (macaca mulatta) and humans (homo sapiens). in experiment 1, four individuals of each nonhuman primate species were trained to select the numerically larger of two visual arrays on a touchscreen. we estimated numerical acuity by modeling weber fractions (w) and found quantitatively equivalent performance among all f ... | 2014 | 24068469 |
| opsin gene polymorphism predicts trichromacy in a cathemeral lemur. | recent research has identified polymorphic trichromacy in three diurnal strepsirrhines: coquerel's sifaka (propithecus coquereli), black and white ruffed lemurs (varecia variegata), and red ruffed lemurs (v. rubra). current hypotheses suggest that the transitions to diurnality experienced by propithecus and varecia were necessary precursors to their independent acquisitions of trichromacy. accordingly, cathemeral lemurs are thought to lack the m/l opsin gene polymorphism necessary for trichromac ... | 2009 | 18837042 |
| female dominance in blue-eyed black lemurs(eulemur macaco flavifrons). | female dominance is unusual among mammals and has been described in detail for only a handful of species. here we present data on the frequency and outcome of dominance interactions in seven semi-free ranging and captive groups of blue-eyed black lemurs (eulemur macaco flavifrons) housed at the duke university primate center. we collected over 260 hours of focal data during which all occurrences of dominant-subordinate interactions were recorded. we collected data outside the typical breeding an ... | 2002 | 12145400 |
| juvenile dominance in eulemur macaco flavifrons: the influence of sex and maternal rank. | | 2006 | 10567834 |
| visualization and quantification of mimetic musculature via dicect. | the muscles of facial expression are of significant interest to studies of communicative behaviors. however, due to their small size and high integration with other facial tissues, the current literature is largely restricted to descriptions of the presence or absence of specific muscles. using diffusible iodine-based contrast-enhanced computed tomography (dicect) to stain and digitally image the mimetic mask of eulemur flavifrons (the blue-eyed black lemur), we demonstrate-for the first time-th ... | 2020 | 32587802 |
| evidence for the possible occurrence of grave's disease in a blue-eyed black lemur (eulemur flavifrons). | the blue-eyed black lemur (eulemur flavifrons) is classified by the international union for conservation of nature (iucn) as critically endangered. a 23-year-old male housed at mulhouse zoo presented with lethargy, polyphagia, alopecia, and chronic weight loss. clinical examination suggested an endocrine pathology such as hyperthyroidism. secondary examinations included cervical ultrasound, thyroid biopsy, and scintigraphy. the latter revealed elevated thyroid activity. blood analysis was perfor ... | 2018 | 29264764 |