[cytogenetic study of six species or sub-species of mangabeys monkeys (papiinae, cercopithecidae) (author's transl)].chromosome banding patterns of six mangabey species or sub-species are studied and compared. by comparison with the other papiinae previously studied (papio and macaca) lophocebus albigena and l. aterrimus possess very similar karyotypes, differing a most by a pericentric inversion of the y chromosome. the other four, cercocebus torquatus torquatus, c. t. fuliginosus, c. galeritus galeritus and c. g. chrysogaster differ by a complex rearrangement of chromosome no. 10 and by acquisition of hetero ...1979115374
learning to outwit a competitor in mangabeys (cercocebus torquatus torquatus).to investigate whether monkeys would be able to acquire the location of hidden food from the experimenter and later from an informed conspecific, a group of 7 mangabeys (cercocebus torquatus torquatus) was tested in an experimental design comparable to menzel's (1974) with chimpanzees. food was hidden in the presence of particular animals. an informed young male repeatedly lost his food to a dominant male. accordingly, the young male developed a pattern, when he alone was informed, of moving in ...19948026168
natural infection of a household pet red-capped mangabey (cercocebus torquatus torquatus) with a new simian immunodeficiency virus.a seroprevalence survey was conducted for simian immunodeficiency virus (siv) antibody in household pet monkeys in gabon. twenty-nine monkeys representing seven species were analyzed. by using human immunodeficiency virus type 2 (hiv-2)/sivsm, sivmnd, and sivagm antigens, one red-capped mangabey (rcm) (cercocebus torquatus torquatus) was identified as harboring siv-cross-reactive antibodies. a virus isolate, termed sivrcm, was subsequently established from this seropositive rcm by cocultivation ...19989420264
natural infection of a homozygous delta24 ccr5 red-capped mangabey with an r2b-tropic simian immunodeficiency virus.a homozygous 24-bp deletion (delta24) was found in the cc chemokine receptor 5 (ccr5) of 11 out of 15 red-capped mangabeys (rcms), cercocebus torquatus torquatus, both in africa and in an american zoo. the ccr5 delta24 defect encompassed eight amino acids in frame in the fourth transmembrane region. unexpectedly, rcm-009, one of 11 homozygotes (delta24ccr5/ delta24ccr5), was found to be naturally infected with a divergent simian immunodeficiency virus (siv) strain, which was not r5-tropic, but u ...19989841919
characterization of novel simian immunodeficiency viruses from red-capped mangabeys from nigeria (sivrcmng409 and -ng411).two novel simian immunodeficiency virus (siv) strains from wild-caught red-capped mangabeys (cercocebus torquatus torquatus) from nigeria were characterized. sequence analysis of the fully sequenced siv strain rcmng411 (sivrcmng411) and gag and pol sequence of sivrcmng409 revealed that they were genetically most closely related to the recently characterized sivrcm from gabon (sivrcmgb1). thus, red-capped mangabeys from distant geographic locations harbor a common lineage of siv. sivrcmng411 carr ...200111711592
a novel, divergent simian t-cell lymphotropic virus type 3 in a wild-caught red-capped mangabey (cercocebus torquatus torquatus) from nigeria.we present here a novel, distinct simian t-cell lymphotropic virus (stlv) found in a red-capped mangabey (cercocebus torquatus) (cto-ng409), wild-caught in nigeria, that showed an htlv-2-like western blot (wb) seroreactivity. the complete genome (8920 bp) of cto-ng409 stlv was related to but different from stlv-3/pha-ph969 (13.5 %) and stlv-3/ppa-f3 (7.6 %), and stlv-3/cto604 (11.3 %), found in eritrean and senegalese baboons, and red-capped mangabeys from cameroon, respectively. phylogenetic an ...200313679606
influence of food dispersion on feeding activity and social interactions in captive lophocebus albigena and cercocebus torquatus torquatus.we analysed the impact of the distribution of food items on feeding activity and social interactions in captive red-capped and grey-cheeked mangabeys. three different feeding situations were presented: food items were either placed in a single heap or dispersed in several smaller heaps on the ground or in space. social interactions were estimated by the frequency of positive, as well as of negative social interactions and by the structure of visual social attention. feeding activity was estimate ...200515349792
hand preference in unimanual and bimanual tasks and postural effect on manual laterality in captive red-capped mangabeys (cercocebus torquatus torquatus).hand preference in 11 captive red-capped mangabeys (cercocebus torquatus torquatus) was examined under different conditions: a free situation during spontaneous food processing, three different postural conditions (brachiating, and bipedal and tripedal standing), and a situation involving bimanual processing. generally, individual laterality was found regardless of the task and behavior involved. however, the number of monkeys with hand preferences and the strength of the preference increased wi ...200616541442
postural effect on manual laterality in different tasks in captive grey-cheeked mangabey (lophocebus albigena).the authors examined the effects of task complexity and posture on laterality and compared lateralization during different tasks in 9 captive grey-cheeked mangabeys (lophocebus albigena) during spontaneous food processing and 3 experimental tasks. comparisons with data of red-capped mangabeys (cercocebus torquatus torquatus; semiterrestrial species) were used. less than half the monkeys were lateralized for simple everyday activities, but 6 were lateralized for complex daily activities. moreover ...200717516799
nonpathogenic ccr2-tropic sivrcm after serial passage and its effect on sivmac infection of indian rhesus macaques.the natural host of sivrcm is the red-capped mangabey (cercocebus torquatus torquatus). although this virus infects macaques and human pbmcs, its pathogenic potential is unknown. we serially passaged sivrcm through 9 rhesus macaques to assess its potential for virulence. sivrcm infected all macaques with peak viremia 2 weeks postinfection yet viral loads decreased to undetectable levels about one month after inoculation. remarkably, sivrcm replication and virulence did not increase following 7 s ...200818662820
task complexity, posture, age, sex: which is the main factor influencing manual laterality in captive cercocebus torquatus torquatus?behavioural asymmetries reflect brain asymmetry in nonhuman primates (nhp) as in humans. by investigating manual laterality, researchers can study the evolution of brain hemisphere specialisation. three dominant theories aim to establish an evolutionary scenario. the most recent theory relates different levels of manual laterality to task complexity. our investigation aimed to evaluate the importance of two extrinsic factors (posture and the need for manual coordination) and two intrinsic factor ...201121298589
visual laterality responses to different emotive stimuli by red-capped mangabeys, cercocebus torquatus torquatus.hemispheric asymmetry in emotional perception has been put forward by different theories as the right hemisphere theory or the valence theory. but no consensus was found about the role played by both hemispheres. so, in order to test the different theories, we investigated preferential use of one eye in red-capped mangabeys, at the individual as well as at the group level. in this study we investigated the influence of the emotional value of stimuli on the direction and strength of visual prefer ...200918566841
variability in social visual attention in the red-capped mangabey (cercocebus torquatus torquatus) and the grey-cheeked mangabey (cercocebus albigena albigena). 200810567831
patterns of social visual attention in the red-capped mangabey (cercocebus torquatus torquatus) in the context of food competition 199910394071
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