| diurnal behavior of lemur mongoz at ampijoroa, madagascar. | lemur mongoz was observed for 28 h between february and july in ampijoroa, northwestern madagascar. the animals were diurnal, with peaks of activity in mid-morning and late afternoon. this finding contrasts with other reports that l. mongoz at the same site and somewhat later in the year are nocturnal. group size was three or four. l. mongoz associated with l. fulvus during group progression and feeding and when giving alarm responses to man. vocal signals consist of a range of intergrading grun ... | 1978 | 97190 |
| nonhuman primates: laboratory animals of choice for neurophysiologic studies of sleep. | a systematic study was made of several nonhuman primates to learn more about their relative usefulness for studies of sleep. species studied included the guinea baboon (papio papio), kenya or yellow baboon (p cynocephalus), olive baboon (p anubis), sacred baboon (p hamadryas), vervet monkey (cercopithecus aethiops), rhesus monkey (macaca mulatta), bonnet monkey (m radiata), crab-eating monkey (m fascicularis), patas monkey (erythrocebus patas), chimpanzee (pan troglodytes), mongoose lemur (lemur ... | 1977 | 201798 |
| comparative expression of hedonic impact: affective reactions to taste by human infants and other primates. | this study examines behavioral affective reactions elicited by tastes from eight newborn human infants, and from 27 other infant or adult primates. non-human primates belonged to 11 species: three great apes (chimpanzee, orangutan, gorilla), three old world monkeys (rhesus monkey, greater spot-nosed monkey, and red-capped mangabey), four new world monkeys (golden-handed tamarin, cotton-top tamarin, white tufted-ear marmoset, and humboldt's night monkey), and one lemur (mongoose lemur). the taste ... | 2001 | 11166078 |
| a molecular approach to comparative phylogeography of extant malagasy lemurs. | the lemurs of madagascar provide an excellent model for exploring evolutionary diversification. this study investigates genetic divergence among most extant lemur taxa in relation to potential geographical boundaries to gene flow. for this purpose, approximately 2,400 bp of mitochondrial dna (part of the coiii gene; nd3, nd4l, and nd4 genes; and five trnas) were sequenced in a total of 131 lemurs from 5 families, 12 genera, 25 species, and 18 subspecies to reconstruct phylogenetic relationships ... | 2003 | 12719521 |
| serum proteins found in primates. i. proteins of man, macaccus irus and lemur mongoz. | | 1962 | 14486330 |
| diet and nutrition in wild mongoose lemurs (eulemur mongoz) and their implications for the evolution of female dominance and small group size in lemurs. | data collected on the feeding behavior, food intake, and chemical analyses of plant foods were used to document seasonal variation in diet and nutrition in eulemur mongoz in northwestern madagascar. e. mongoz conforms to the general eulemur dietary pattern, with a predominantly frugivorous diet supplemented mainly by leaves, flowers, and nectar. phytochemical analysis revealed high water contents in all the main plant foods; mature fruit and flowers contained the most water-soluble carbohydrates ... | 2004 | 15197819 |
| expression of neuron-specific markers by the vomeronasal neuroepithelium in six species of primates. | vomeronasal organ (vno) morphology varies markedly across primate taxa. old world monkeys display no postnatal vno. humans and at least some apes retain a vestigial vno during postnatal life, whereas the strepsirrhines and new world monkeys present a morphologically well-defined vno that, in many species, is presumed to function as an olfactory organ. available microanatomical and behavioral studies suggest that vno function in these species does not precisely duplicate that described in other m ... | 2004 | 15470676 |
| analog number representations in mongoose lemurs (eulemur mongoz): evidence from a search task. | a wealth of data demonstrating that monkeys and apes represent number have been interpreted as suggesting that sensitivity to number emerged early in primate evolution, if not before. here we examine the numerical capacities of the mongoose lemur (eulemur mongoz), a member of the prosimian suborder of primates that split from the common ancestor of monkeys, apes and humans approximately 47-54 million years ago. subjects observed as an experimenter sequentially placed grapes into an opaque bucket ... | 2005 | 15660208 |
| expectations about numerical events in four lemur species (eulemur fulvus, eulemur mongoz, lemur catta and varecia rubra). | although much is known about how some primates--in particular, monkeys and apes--represent and enumerate different numbers of objects, very little is known about the numerical abilities of prosimian primates. here, we explore how four lemur species (eulemur fulvus, e. mongoz, lemur catta, and varecia rubra) represent small numbers of objects. specifically, we presented lemurs with three expectancy violation looking time experiments aimed at exploring their expectations about a simple 1+1 additio ... | 2005 | 15729569 |
| 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 |
| object permanence in lemurs. | object permanence, the ability to mentally represent objects that have disappeared from view, should be advantageous to animals in their interaction with the natural world. the objective of this study was to examine whether lemurs possess object permanence. thirteen adult subjects representing four species of diurnal lemur (eulemur fulvus rufus, eulemur mongoz, lemur catta and hapalemur griseus) were presented with seven standard piagetian visible and invisible object displacement tests, plus on ... | 2009 | 18936991 |
| genetic analysis of hybridization and introgression between wild mongoose and brown lemurs. | hybrid zones generally represent areas of secondary contact after speciation. the nature of the interaction between genes of individuals in a hybrid zone is of interest in the study of evolutionary processes. in this study, data from nuclear microsatellites and mitochondrial dna sequences were used to genetically characterize hybridization between wild mongoose lemurs (eulemur mongoz) and brown lemurs (e. fulvus) at anjamena in west madagascar. | 2009 | 19196458 |
| [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 |
| social complexity predicts transitive reasoning in prosimian primates. | transitive inference is a form of deductive reasoning that has been suggested as one cognitive mechanism by which animals could learn the many relationships within their group's dominance hierarchy. this process thus bears relevance to the social intelligence hypothesis which posits evolutionary links between various forms of social and nonsocial cognition. recent evidence corroborates the link between social complexity and transitive inference and indicates that highly social animals may show s ... | 2008 | 19649139 |
| evolutionary roots of motor planning: the end-state comfort effect in lemurs. | humans (homo sapiens) anticipate the consequences of their forthcoming actions. for example, they grasp objects with uncomfortable grasps to afford comfortable end positions-the end-state comfort (esc) effect. when did such sophisticated motor planning abilities emerge in evolution? we addressed this question by asking whether humans' most distant living primate relatives-lemurs-also exhibit the esc effect. we presented 6 species of lemurs (lemur catta, eulemur mongoz, eulemur coronatus, eulemur ... | 2010 | 20476823 |
| cycles of activity, group composition, and diet of lemur mongoz mongoz linnaeus 1766 in madagascar. | a preliminary study of the ecology and behavior of lemur mongoz mongoz was carried out in the northwest of madagascar. the animals were observed for approximately 250 h in july till august, 1973, and for 50 h in june, 1974. l.m.mongoz has been reported to be diurnal and to live in groups of 6-8 individuals. however, we found the animals to be nocturnal and that groups contained an adult male, an adult female and their offspring (groups numbering from 2 to 4 individuals). l.m.mongoz is thus the o ... | 1976 | 827480 |
| structural characterization of neutral and acidic oligosaccharides in the milks of strepsirrhine primates: greater galago, aye-aye, coquerel's sifaka and mongoose lemur. | the structures of milk oligosaccharides were characterized for four strepsirrhine primates to examine the extent to which they resemble milk oligosaccharides in other primates. neutral and acidic oligosaccharides were isolated from milk of the greater galago (galagidae: otolemur crassicaudatus), aye-aye (daubentoniidae: daubentonia madagascariensis), coquerel's sifaka (indriidae: propithecus coquereli) and mongoose lemur (lemuridae: eulemur mongoz), and their chemical structures were characteriz ... | 2012 | 22311613 |
| pair-bonding, female aggression and the evolution of lemur societies. | lemur societies have been described as convergent with those of anthropoids, including papio-like female-bonded multi-male groups. recent research, however, shows at least 5 pair-bonded species among the lemuridae and indriidae. three more, eulemur mongoz, eulemur fulvus and varecia variegata, have societies combining aspects of pairing with aspects of troop life. the best-known female-bonded societies, those of lemur catta, propithecus diadema edwardsi and propithecus verreauxi, may be assembla ... | 1998 | 9595685 |
| 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 |
| the ecology of spatial memory in four lemur species. | evolutionary theories suggest that ecology is a major factor shaping cognition in primates. however, there have been few systematic tests of spatial memory abilities involving multiple primate species. here, we examine spatial memory skills in four strepsirrhine primates that vary in level of frugivory: ruffed lemurs (varecia sp.), ring-tailed lemurs (lemur catta), mongoose lemurs (eulemur mongoz), and coquerel's sifakas (propithecus coquereli). we compare these species across three studies targ ... | 2014 | 24469310 |
| daily activity and light exposure levels for five species of lemurs at the duke lemur center. | light is the primary synchronizer of all biological rhythms, yet little is known about the role of the 24-hour luminous environment on nonhuman primate circadian patterns, making it difficult to understand the photic niche of the ancestral primate. here we present the first data on proximate light-dark exposure and activity-rest patterns in free-ranging nonhuman primates. four individuals each of five species of lemurs at the duke lemur center (eulemur mongoz, lemur catta, propithecus coquereli, ... | 2014 | 24318943 |
| non-invasive monitoring of reproductive status in wild mongoose lemurs (eulemur mongoz). | endocrine profiles were investigated in wild and captive mongoose lemurs (eulemur mongoz; lemuridae) by analysing faecal progestagens and oestrogens. oestrous cycle characterization was not possible, as most females appeared to conceive during the first oestrus of the breeding season. conception was preceded by a pseudo-oestrus with no discernible luteal phase. pseudo-oestrus and oestrus identification was possible by investigating the oestrogen:progestagen ratio. pregnancy was reliably determin ... | 2000 | 11194553 |
| cathemerality in the mongoose lemur, eulemur mongoz. | results of a 10 month study of the mongoose lemur (eulemur mongoz) at anjamena are presented. the activity pattern is documented in detail for both wet and dry seasons based on observations conducted over the entire 24 h period. e. mongoz was found to be cathemeral throughout the year but exhibited shifts towards more diurnal activity in the wet season and more nocturnal activity in the dry season. the cathemeral activity pattern in the mongoose lemur appears to be coordinated with sunrise, suns ... | 1999 | 10206207 |
| social structure and seasonal variation in the behaviour of eulemur mongoz. | data presented here were collected during a 10-month study carried out on the mongoose lemur, eulemur mongoz, at anjamena in northwestern madagascar. baseline information is provided on behaviour and assessed for seasonal variation. given the highly seasonal nature of the environment, remarkably little behavioural variation was observed. this may be directly linked to the cathemeral activity pattern, where differential movement into either the diurnal or the nocturnal 'niche' could reduce the ef ... | 2006 | 10085515 |
| social inhibitory control in five lemur species. | we tested five lemur species-ring-tailed lemurs, ruffed lemurs, mongoose lemurs, black lemurs, and coquerel's sifakas-(n = 52) in an experiment that evaluated skills for inhibitory control in a social context. first, two human experimenters presented identical food rewards; the "generous" experimenter allowed the subject to eat from her hand, whereas the "competitive" experimenter always withheld the reward. lemurs quickly learned to approach the generous experimenter and avoid the competitive o ... | 2015 | 25822664 |
| tuberculosis in lemur mongoz. | | 1967 | 6067713 |
| observation on the eccrine sweat glands of lemur mongoz after denervation. | | 1965 | 14258913 |
| the skin of primates. xvii. pharmacological properties of the sweat gland of lemur mongoz. | | 1964 | 14172196 |
| the skin of primates. xvi. the skin of lemur mongoz. | | 1963 | 14159971 |
| clonal spread of yersinia enterocolitica 1b/o:8 in multiple zoo species. | yersinia enterocolitica (ye) bioserotype 1b/o:8 (ye 1b/o:8) was identified in routine culture of a variety of zoo species housed at omaha's henry doorly zoo and aquarium (ohdza) from april to july 2011. animal cases representing 12 species had ye detected from 34 cases during routine fecal monitoring and/or during postmortem examination: coquerel's sifakas (propithecus coquereli, two cases), black & white (bw) ruffed lemurs (varecia variegata variegata, six cases), red ruffed lemurs (varecia rub ... | 2020 | 32212560 |
| lemur species-specific metapopulation responses to habitat loss and fragmentation. | determining what factors affect species occurrence is vital to the study of primate biogeography. we investigated the metapopulation dynamics of a lemur community consisting of eight species (avahi occidentalis, propithecus coquereli, microcebus murinus, microcebus ravelobensis, lepilemur edwardsi, cheirogaleus medius, eulemur mongoz, and eulemur fulvus) within fragmented tropical dry deciduous forest habitat in ankarafantsika national park, madagascar. we measured fragment size and isolation of ... | 2018 | 29742108 |
| dicect analysis of the extreme gouging adaptations within the masticatory apparatus of the aye-aye (daubentonia madagascariensis). | relative to all other primates, the aye-aye (daubentonia madagascariensis) exists at the extremes of both morphology and behavior. its specialized anatomy-which includes hypselodont incisors and highly derived manual digits-reflects a dietary niche, unique among primates, which combines tap-foraging with gouging to locate and extract wood-boring larvae. here, we explore the impact of this extreme dietary ecology upon the masticatory musculature of this taxon with reference to a second, similarly ... | 2020 | 31714689 |
| the cost of deep sleep: environmental influences on sleep regulation are greater for diurnal lemurs. | primates spend almost half their lives asleep, yet we know little about how evolution has shaped variation in the duration or intensity of sleep (i.e., sleep regulation) across primate species. our objective was to test hypotheses related to how sleeping site security influences sleep intensity in different lemur species. | 2018 | 29989159 |