Log in

Relevant bibliographies by topics / Primates – Gabon / Journal articles

To see the other types of publications on this topic, follow the link: Primates – Gabon.

Journal articles on the topic 'Primates – Gabon'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 43 journal articles for your research on the topic 'Primates – Gabon.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Blom, A., M. P. T. Alers, A. T. C. Feistner, R. F. W. Barnes, and K. L. Barnes. "Primates in Gabon – current status and distribution." Oryx 26, no. 4 (1992): 223–34. http://dx.doi.org/10.1017/s0030605300023759.

Full text

Abstract:

This paper examines the current status and distribution of primates in Gabon on the basis of data collected in the field between 1985 and 1988. There are at least 19 and possibly 21 species of primates definitely present in Gabon, making it one of the richest countries in the world for primates. Most of the species are still widespread and one, the sun-tailed guenon, is endemic. Hunting and habitat destruction are the main threats to the country's primates. The major problem at the moment is the opening up of previously inaccessible areas by logging companies and the Trans Gabon railway, which

APA, Harvard, Vancouver, ISO, and other styles

2

Tutin, Caroline E. G., Richard J. Parnell, and Frank White. "Protecting seeds from primates: examples from Diospyros spp. in the Lopé Reserve, Gabon." Journal of Tropical Ecology 12, no. 3 (1996): 371–84. http://dx.doi.org/10.1017/s0266467400009573.

Full text

Abstract:

ABSTRACTThe fruit of six species of Diospyros (Ebenaceae) provide food for eight species of diurnal primates in the Lopé Reserve, Gabon. Both succulent flesh and immature seeds are eaten but patterns of consumption vary among the primate species. Interactions between D. mannii, which has very large fruit (9 cm × 7 cm) and seeds (5 cm × 2 cm), and primates were observed in detail. D. mannii fruit are unusual, being covered by a dense mat of irritant hairs that are largely retained, but become looser on ripening, when fruit are abscissed. Primates do not eat immature seeds of this species but do

APA, Harvard, Vancouver, ISO, and other styles

3

Ngoubangoye, Barthelemy, Gael Darren Maganga, Larson Boundenga, et al. "Absence of paramyxovirus RNA in non-human primate sanctuaries and a primatology center in Gabon." Journal of Epidemiological Research 5, no. 2 (2019): 6. http://dx.doi.org/10.5430/jer.v5n2p6.

Full text

Abstract:

The viruses of the Paramyxoviridae family are known to infect a wide range of animals, including primates, birds, rodents,carnivores, bats, ungulates, snakes, cetaceans and humans. This study aims to investigate the circulation of paramyxoviruses in five potential host species groups (humans, non-human primates, rodents, shrews, and bats) living in the same environments in three conservation programs dedicated to non-human primates, namely the Lékédi park, the primatology center of the International Center for Medical Research of Franceville and the Gorilla Protection Program, located in Gabon

APA, Harvard, Vancouver, ISO, and other styles

4

Ngoubangoye, Barthélémy, Larson Boundenga, Serge-Ely Dibakou, et al. "Surgical Treatment of Oesophagostomum spp. Nodular Infection in a Chimpanzee at the CIRMF Primatology Center, Gabon." Case Reports in Veterinary Medicine 2021 (March 26, 2021): 1–5. http://dx.doi.org/10.1155/2021/6617416.

Full text

Abstract:

Oesophagostomosis is a zoonotic disease caused by nematodes of the genus Oesophagostomum in the intestinal walls of many species, including ruminants, pigs, humans, and nonhuman primates. Although great apes appear to tolerate the parasite in the wild, they can develop a clinical form that can lead to death in captivity and the natural environment. At the Primatology Centre of the International Centre for Medical Research in Franceville (CIRMF) in Gabon, we recorded 4 deaths of chimpanzees (Pan t. troglodytes) caused by Oesophagostomum spp. between 2015 and 2019. In each case, coprological ana

APA, Harvard, Vancouver, ISO, and other styles

5

Tutin, Caroline E. G. "Fragmented living: Behavioural ecology of primates in a forest fragment in the Lopé Reserve, Gabon." Primates 40, no. 1 (1999): 249–65. http://dx.doi.org/10.1007/bf02557714.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Poaty-Mavoungou, Virginie, Richard Onanga, Philippe Yaba, Andre Delicat, Guy Dubreuil, and Elie Mavoungou. "Comparative analysis of natural killer cell activity, lymphoproliferation and lymphocyte surface antigen expression in nonhuman primates housed at the CIRMF Primate Center, Gabon." Journal of Medical Primatology 30, no. 1 (2001): 26–35. http://dx.doi.org/10.1111/j.1600-0684.2001.300104.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Lahm, S. A., R. F. W. Barnes, K. Beardsley, and P. Cervinka. "A method for censusing the greater white-nosed monkey in northeastern Gabon using the population density gradient in relation to roads." Journal of Tropical Ecology 14, no. 5 (1998): 629–43. http://dx.doi.org/10.1017/s0266467498000443.

Full text

Abstract:

This paper presents a method for estimating monkey numbers in a large area of forest where there is a gradient of monkey densities. The method is illustrated using data collected in the northeastern forests of Gabon during an earlier project. These forests are sparsely populated and there are few roads. The density of Cercopithecus nictitans increases with distance from the nearest road. A geographic information system (GIS) divided the forest into bands of increasing distance from the nearest road. The number of monkeys in each band is the product of the monkey density in that band and the ar

APA, Harvard, Vancouver, ISO, and other styles

8

Tutin, Caroline E. G., Elizabeth A. Williamson, M. Elizabeth Rogers, and Michel Fernandez. "A case study of a plant-animal relationship: Cola lizae and lowland gorillas in the Lopé Reserve, Gabon." Journal of Tropical Ecology 7, no. 2 (1991): 181–99. http://dx.doi.org/10.1017/s0266467400005320.

Full text

Abstract:

ABSTRACTThe frails of Cola lizae, an endemic tree with a limited geographical distribution, have been a major food source for lowland gorillas in the Lopé Reserve during part of each year over a six-year period. Faecal analysis indicated that 11,000-18,000 Cola seeds km-2 were deposited by gorillas during the 4-month season in 1989. Gorillas are the only important dispersers of this species: other primates consume the succulent mesocarp, but do not swallow the large seed; elephants do not eat Cola fruits. Observations of Cola seeds in gorilla faeces showed a very high germination rate and, des

APA, Harvard, Vancouver, ISO, and other styles

9

Makuwa, M., S. Souquiere, P. Telfer, et al. "Occurrence of hepatitis viruses in wild-born non-human primates: a 3 year (1998-2001) epidemiological survey in Gabon." Journal of Medical Primatology 32, no. 6 (2003): 307–14. http://dx.doi.org/10.1046/j.1600-0684.2003.00042.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Mouinga-Ondémé, Augustin, Mélanie Caron, Antoine Gessain, and Mirdad Kazanji. "High level of inter-species transmission of simian foamy virus from non-human primates to humans in Gabon, central Africa." Retrovirology 8, Suppl 1 (2011): A229. http://dx.doi.org/10.1186/1742-4690-8-s1-a229.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

King, Tony, Christelle Chamberlan, and Amos Courage. "Assessing reintroduction success in long-lived primates through population viability analysis: western lowland gorillas Gorilla gorilla gorilla in Central Africa." Oryx 48, no. 2 (2013): 294–303. http://dx.doi.org/10.1017/s0030605312001391.

Full text

Abstract:

AbstractThe use of population modelling has become an increasingly common tool in reintroduction planning and assessment. Although initial reintroduction success is often measured by quantifying post-release survival and reproduction, longer-term success is best assessed through measurements of population viability. Here we develop a population model capable of providing useful results for influencing management of a reintroduction programme for a long-lived and slow-reproducing primate, the western lowland gorilla Gorilla gorilla gorilla. We used post-release monitoring data from two reintrod

APA, Harvard, Vancouver, ISO, and other styles

12

Mouinga-Ondémé, Augustin, and Mirdad Kazanji. "Simian Foamy Virus in Non-Human Primates and Cross-Species Transmission to Humans in Gabon: An Emerging Zoonotic Disease in Central Africa?" Viruses 5, no. 6 (2013): 1536–52. http://dx.doi.org/10.3390/v5061536.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

King, Tony, Christelle Chamberlan, and Amos Courage. "Assessing Initial Reintroduction Success in Long-Lived Primates by Quantifying Survival, Reproduction, and Dispersal Parameters: Western Lowland Gorillas (Gorilla gorilla gorilla) in Congo and Gabon." International Journal of Primatology 33, no. 1 (2011): 134–49. http://dx.doi.org/10.1007/s10764-011-9563-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Segawa, Takahiro, Satoshi Fukuchi, Dylan Bodington, et al. "Genomic Analyses of Bifidobacterium moukalabense Reveal Adaptations to Frugivore/Folivore Feeding Behavior." Microorganisms 7, no. 4 (2019): 99. http://dx.doi.org/10.3390/microorganisms7040099.

Full text

Abstract:

Despite the essential role of Bifidobacterium in health-promoting gut bacteria in humans, little is known about their functions in wild animals, especially non-human primates. It is difficult to determine in vivo the function of Bifidobacterium in wild animals due to the limited accessibility of studying target animals in natural conditions. However, the genomic characteristics of Bifidobacterium obtained from the feces of wild animals can provide insight into their functionality in the gut. Here, we analyzed the whole genomes of 12 B. moukalabense strains isolated from seven feces samples of

APA, Harvard, Vancouver, ISO, and other styles

15

Richard, Léa, Réjane Rua, Edouard Betsem, et al. "Cocirculation of TwoenvMolecular Variants, of Possible Recombinant Origin, in Gorilla and Chimpanzee Simian Foamy Virus Strains from Central Africa." Journal of Virology 89, no. 24 (2015): 12480–91. http://dx.doi.org/10.1128/jvi.01798-15.

Full text

Abstract:

ABSTRACTSimian foamy virus (SFV) is a ubiquitous retrovirus in nonhuman primates (NHPs) that can be transmitted to humans, mostly through severe bites. In the past few years, our laboratory has identified more than 50 hunters from central Africa infected with zoonotic SFVs. Analysis of the complete sequences of five SFVs obtained from these individuals revealed thatenvwas the most variable gene. Furthermore, recombinant SFV strains, some of which involve sequences in theenvgene, were recently identified. Here, we investigated the variability of theenvgenes of zoonotic SFV strains and searched

APA, Harvard, Vancouver, ISO, and other styles

16

Beer, Brigitte E., Brian T. Foley, Carla L. Kuiken, et al. "Characterization of Novel Simian Immunodeficiency Viruses from Red-Capped Mangabeys from Nigeria (SIVrcmNG409 and -NG411)." Journal of Virology 75, no. 24 (2001): 12014–27. http://dx.doi.org/10.1128/jvi.75.24.12014-12027.2001.

Full text

Abstract:

ABSTRACT 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) andgag 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 carried a vpx gene in addition tovpr, suggesting a common evolutionary ancestor with SIVsm (from

APA, Harvard, Vancouver, ISO, and other styles

17

Harrison, Michael J. S. "The mandrill in Gabon's rain forest—ecology, distribution and status." Oryx 22, no. 4 (1988): 218–28. http://dx.doi.org/10.1017/s0030605300022365.

Full text

Abstract:

Little is known about the mandrill Mandrillus sphinx in the wild. It is an elusive primate and thus difficult to study in its rain-forest habitat in equatorial Africa. As human pressure on its habitat grows it has become increasingly urgent to discover more about the species so that appropriate conservation measures can be planned. The author made a 15-month study of the mandrill in Gabon and discovered that it was not as widely distributed as had been believed. Although it is threatened by hunting pressure and habitat disruption, populations still remain and five reserves protect some of thes

APA, Harvard, Vancouver, ISO, and other styles

18

Bourry, Olivier, Patricia Peignot, and Pierre Rouquet. "Contraception in the chimpanzee: 12-year experience at the CIRMF Primate Centre, Gabon." Journal of Medical Primatology 34, no. 1 (2005): 25–34. http://dx.doi.org/10.1111/j.1600-0684.2004.00088.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Mangama-Koumba, Lilian Brice, Nakashima Yoshihiro, Jacques François Mavoungou, et al. "Estimating diurnal primate densities using distance sampling method in Moukalaba-Doudou National Park, Gabon." Journal of Applied Biosciences 99, no. 1 (2016): 9395. http://dx.doi.org/10.4314/jab.v99i1.5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Souquière, Sandrine, Frédéric Bibollet-Ruche, David L. Robertson, et al. "Wild Mandrillus sphinx Are Carriers of Two Types of Lentivirus." Journal of Virology 75, no. 15 (2001): 7086–96. http://dx.doi.org/10.1128/jvi.75.15.7086-7096.2001.

Full text

Abstract:

ABSTRACT Mandrillus sphinx, a large primate living in Cameroon and Gabon and belonging to the Papionini tribe, was reported to be infected by a simian immunodeficiency virus (SIV) (SIVmndGB1) as early as 1988. Here, we have identified a second, highly divergent SIVmnd (designated SIVmnd-2). Genomic organization differs between the two viral types; SIVmnd-2 has the additionalvpx gene, like other SIVs naturally infecting the Papionini tribe (SIVsm and SIVrcm) and in contrast to the other SIVmnd type (here designated SIVmnd-1), which is more closely related to SIVs infecting l'hoest (Cercopithecu

APA, Harvard, Vancouver, ISO, and other styles

21

Lacoste, Vincent, Philippe Mauclere, Guy Dubreuil, et al. "Simian Homologues of Human Gamma-2 and Betaherpesviruses in Mandrill and Drill Monkeys." Journal of Virology 74, no. 24 (2000): 11993–99. http://dx.doi.org/10.1128/jvi.74.24.11993-11999.2000.

Full text

Abstract:

ABSTRACT Recent serological and molecular surveys of different primate species allowed the characterization of several Kaposi's sarcoma-associated herpesvirus (KSHV) homologues in macaques, African green monkeys, chimpanzees, and gorillas. Identification of these new primate rhadinoviruses revealed the existence of two distinct genogroups, called RV1 and RV2. Using a degenerate consensus primer PCR method for the herpesvirus DNA polymerase gene, the presence of KSHV homologues has been investigated in two semi-free-ranging colonies of eight drill (Mandrillus leucophaeus), five mandrill (Mandri

APA, Harvard, Vancouver, ISO, and other styles

22

Liégeois, Florian, Vanina Boué, Fatima Mouacha, et al. "New STLV-3 strains and a divergent SIVmus strain identified in non-human primate bushmeat in Gabon." Retrovirology 9, no. 1 (2012): 28. http://dx.doi.org/10.1186/1742-4690-9-28.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Tutin, Caroline E. G., Rebecca M. Ham, Lee J. T. White, and Michael J. S. Harrison. "The primate community of the Lopé reserve, Gabon: Diets, responses to fruit scarcity, and effects on biomass." American Journal of Primatology 42, no. 1 (1997): 1–24. http://dx.doi.org/10.1002/(sici)1098-2345(1997)42:1<1::aid-ajp1>3.0.co;2-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Nze-Nkogue, Chimene, Masayuki Horie, Shiho Fujita, et al. "Identification and molecular characterization of novel primate bocaparvoviruses from wild western lowland gorillas of Moukalaba-Doudou National Park, Gabon." Infection, Genetics and Evolution 53 (September 2017): 30–37. http://dx.doi.org/10.1016/j.meegid.2017.05.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Georges-Courbot, Marie Claude, Chong Yang Lu, Maria Makuwa, et al. "Natural Infection of a Household Pet Red-Capped Mangabey (Cercocebus torquatus torquatus) with a New Simian Immunodeficiency Virus." Journal of Virology 72, no. 1 (1998): 600–608. http://dx.doi.org/10.1128/jvi.72.1.600-608.1998.

Full text

Abstract:

ABSTRACT 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 of its peripheral blood mononuclear cells (PBMC) with PBMC from seronegative humans or RCMs

APA, Harvard, Vancouver, ISO, and other styles

26

Mullen, Kathy T., Masato Sakurai, and William Chu. "Does L/M Cone Opponency Disappear in Human Periphery?" Perception 34, no. 8 (2005): 951–59. http://dx.doi.org/10.1068/p5374.

Full text

Abstract:

We have assessed the optimal cone contrast sensitivity across eccentricity in human vision of the two cone-opponent mechanisms [L/M or red-green, and S/(L + M) or blue-yellow] and the luminance mechanism. We have used a novel stimulus, termed a ‘sinring’, that is a radially modulated sine-wave arc, Gaussian enveloped in both angular and radial directions. This stimulus overcomes the problem inherent in Gabor stimuli of confounding stimulus spatial frequency, size, and eccentricity and so allows contrast sensitivity to be tracked accurately into the periphery. Our results show that L/M cone opp

APA, Harvard, Vancouver, ISO, and other styles

27

Georges-Courbot, M. C., P. Moisson, E. Leroy, et al. "Occurrence and frequency of transmission of naturally occurring simian retroviral infections (SIV, STLV, and SRV) at the CIRMF Primate Center, Gabon." Journal of Medical Primatology 25, no. 5 (1996): 313–26. http://dx.doi.org/10.1111/j.1600-0684.1996.tb00023.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Santiago, Mario L., Frederic Bibollet-Ruche, Elizabeth Bailes, et al. "Amplification of a Complete Simian Immunodeficiency Virus Genome from Fecal RNA of a Wild Chimpanzee." Journal of Virology 77, no. 3 (2003): 2233–42. http://dx.doi.org/10.1128/jvi.77.3.2233-2242.2003.

Full text

Abstract:

ABSTRACT Current knowledge of the genetic diversity of simian immunodeficiency virus (SIVcpz) infection of wild chimpanzees (Pan troglodytes) is incomplete since few isolates, mostly from captive apes from Cameroon and Gabon, have been characterized; yet this information is critical for understanding the origins of human immunodeficiency virus type 1 (HIV-1) and the circumstances leading to the HIV-1 pandemic. Here, we report the first full-length SIVcpz sequence (TAN1) from a wild chimpanzee (Pan troglodytes schweinfurthii) from Gombe National Park (Tanzania), which was obtained noninvasively

APA, Harvard, Vancouver, ISO, and other styles

29

Shirhatti, Vinay, and Supratim Ray. "Long-wavelength (reddish) hues induce unusually large gamma oscillations in the primate primary visual cortex." Proceedings of the National Academy of Sciences 115, no. 17 (2018): 4489–94. http://dx.doi.org/10.1073/pnas.1717334115.

Full text

Abstract:

Gamma oscillations (∼30–80 Hz) are a prominent signature of electrophysiological signals, with a purported role in natural vision. Previous studies in the primary visual cortex (area V1) have shown that achromatic gratings or gabor stimuli generate salient gamma oscillations, whose strength and frequency depend on stimulus properties such as their size, contrast, and orientation. Surprisingly, although natural images are rarely achromatic, the effect of chromatic input on gamma has not been thoroughly investigated. Recording from primate V1, we show that gamma oscillations of extremely high ma

APA, Harvard, Vancouver, ISO, and other styles

30

Mahieux, Renaud, Colombe Chappey, Marie-Claude Georges-Courbot, et al. "Simian T-Cell Lymphotropic Virus Type 1 from Mandrillus sphinx as a Simian Counterpart of Human T-Cell Lymphotropic Virus Type 1 Subtype D." Journal of Virology 72, no. 12 (1998): 10316–22. http://dx.doi.org/10.1128/jvi.72.12.10316-10322.1998.

Full text

Abstract:

ABSTRACT A recent serological and molecular survey of a semifree-ranging colony of mandrills (Mandrillus sphinx) living in Gabon, central Africa, indicated that 6 of 102 animals, all males, were infected with simian T-cell lymphotropic virus type 1 (STLV-1). These animals naturally live in the same forest area as do human inhabitants (mostly Pygmies) who are infected by the recently described human T-cell lymphotropic virus type 1 (HTLV-1) subtype D. We therefore investigated whether these mandrills were infected with an STLV-1 related to HTLV-1 subtype D. Nucleotide and/or amino acid sequence

APA, Harvard, Vancouver, ISO, and other styles

31

Nieder, Andreas, and Hermann Wagner. "Horizontal-Disparity Tuning of Neurons in the Visual Forebrain of the Behaving Barn Owl." Journal of Neurophysiology 83, no. 5 (2000): 2967–79. http://dx.doi.org/10.1152/jn.2000.83.5.2967.

Full text

Abstract:

Stereovision plays a major role in depth perception of animals having frontally-oriented eyes, most notably primates, cats, and owls. Neuronal mechanisms of disparity sensitivity have only been investigated in anesthetized owls so far. In the current study, responses of 160 visual Wulst neurons to static random-dot stereograms (RDS) were recorded via radiotelemetry in awake, fixating barn owls. The majority of neurons (76%) discharged significantly as a function of horizontal disparity in RDS. The distribution of preferred disparities mirrored the behaviorally relevant range of horizontal disp

APA, Harvard, Vancouver, ISO, and other styles

32

Aubréville, André, and Ilona Bossanyi. "Secondary Forests in Equatorial Africa Côte d’Ivoire - Cameroon - F. E. A." BOIS & FORETS DES TROPIQUES 323, no. 323 (2015): 19. http://dx.doi.org/10.19182/bft2015.323.a31241.

Full text

Abstract:

La « brousse secondaire » s’oppose à la « forêt primaire », forêt « noble » aux grands arbres. C’est une forêt exubérante, inextricable, avec plus de lianes et de petits bois que d’arbres, succédant à l’agricul- ture sur brûlis. Dans les régions habitées, elle entoure communément les villages et borde les routes, la forêt primaire étant reléguée aux collines rocheuses et maré- cages. En Afrique équatoriale, la « brousse secondaire » représente actuellement 50 à 75 % des surfaces forestières. La forma- tion des brousses secondaires procède en trois phases : (i) l’apparition de semis d’es- pèces

APA, Harvard, Vancouver, ISO, and other styles

33

Archambault, Jean, Pierre Lapointe, and France Dumais. "Les cycles d’apprentissage du primaire dans les plans stratégiques des commissions scolaires québécoises." Éducation et francophonie 40, no. 1 (2012): 138–59. http://dx.doi.org/10.7202/1010150ar.

Full text

Abstract:

En 2007, nous avons mis sur pied un programme de recherche visant à étudier la gestion du changement en éducation par un examen de l’organisation de l’école primaire en cycles d’apprentissage, un changement majeur de la réforme du curriculum au Québec (Gouvernement du Québec, 1997; 2001). Nos premiers travaux ont porté sur les écoles primaires de l’île de Montréal (Archambault et Dumais, 2010; Archambault, Dumais et St-Onge, 2009). Nous étudions ici le pilotage des cycles d’apprentissage dans les commissions scolaires francophones du Québec, par le biais de leurs plans stratégiques. Les commis

APA, Harvard, Vancouver, ISO, and other styles

34

Carlini, Alessandro, Olivier Boisard, and Michel Paindavoine. "Analysis of HMAX Algorithm on Black Bar Image Dataset." Electronics 9, no. 4 (2020): 567. http://dx.doi.org/10.3390/electronics9040567.

Full text

Abstract:

An accurate detection and classification of scenes and objects is essential for interacting with the world, both for living beings and for artificial systems. To reproduce this ability, which is so effective in the animal world, numerous computational models have been proposed, frequently based on bioinspired, computational structures. Among these, Hierarchical Max-pooling (HMAX) is probably one of the most important models. HMAX is a recognition model, mimicking the structures and functions of the primate visual cortex. HMAX has already proven its effectiveness and versatility. Nevertheless,

APA, Harvard, Vancouver, ISO, and other styles

35

Delhaye, Benoit P., Xinyue Xia, and Sliman J. Bensmaia. "Rapid geometric feature signaling in the simulated spiking activity of a complete population of tactile nerve fibers." Journal of Neurophysiology 121, no. 6 (2019): 2071–82. http://dx.doi.org/10.1152/jn.00002.2019.

Full text

Abstract:

Tactile feature extraction is essential to guide the dexterous manipulation of objects. The longstanding theory is that geometric features at each location of contact between hand and object are extracted from the spatial layout of the response of populations of tactile nerve fibers. However, recent evidence suggests that some features (e.g., edge orientation) are extracted very rapidly (<200 ms), casting doubt that this information relies on a spatial code, which ostensibly requires integrating responses over time. An alternative hypothesis is that orientation is conveyed in precise tempor

APA, Harvard, Vancouver, ISO, and other styles

36

Sirima, C., C. Bizet, H. Hamou, et al. "Soil-transmitted helminth infections in free-ranging non-human primates from Cameroon and Gabon." Parasites & Vectors 14, no. 1 (2021). http://dx.doi.org/10.1186/s13071-021-04855-7.

Full text

Abstract:

Abstract Background Zoonotic diseases are a serious threat to both public health and animal conservation. Most non-human primates (NHP) are facing the threat of forest loss and fragmentation and are increasingly living in closer spatial proximity to humans. Humans are infected with soil-transmitted helminths (STH) at a high prevalence, and bidirectional infection with NHP has been observed. The aim of this study was to determine the prevalence, genetic diversity, distribution and presence of co-infections of STH in free-ranging gorillas, chimpanzees and other NHP species, and to determine the

APA, Harvard, Vancouver, ISO, and other styles

37

Buechler, Connor R., Adam L. Bailey, Andrea M. Weiler, et al. "Seroprevalence of Zika Virus in Wild African Green Monkeys and Baboons." mSphere 2, no. 2 (2017). http://dx.doi.org/10.1128/msphere.00392-16.

Full text

Abstract:

ABSTRACT Zika virus (ZIKV) is a mosquito-borne virus originally discovered in a captive monkey living in the Zika Forest of Uganda, Africa, in 1947. Recently, an outbreak in South America has shown that ZIKV infection can cause myriad health effects, including birth defects in the children of women infected during pregnancy. Here, we sought to investigate ZIKV infection in wild African primates to better understand its emergence and spread, looking for evidence of active or prior infection. Our results suggest that up to 16% of some populations of nonhuman primate were, at some point, exposed

APA, Harvard, Vancouver, ISO, and other styles

38

Afonso, Philippe V., Olivier Cassar, and Antoine Gessain. "Molecular epidemiology, genetic variability and evolution of HTLV-1 with special emphasis on African genotypes." Retrovirology 16, no. 1 (2019). http://dx.doi.org/10.1186/s12977-019-0504-z.

Full text

Abstract:

AbstractHuman T cell leukemia virus (HTLV-1) is an oncoretrovirus that infects at least 10 million people worldwide. HTLV-1 exhibits a remarkable genetic stability, however, viral strains have been classified in several genotypes and subgroups, which often mirror the geographic origin of the viral strain. The Cosmopolitan genotype HTLV-1a, can be subdivided into geographically related subgroups, e.g. Transcontinental (a-TC), Japanese (a-Jpn), West-African (a-WA), North-African (a-NA), and Senegalese (a-Sen). Within each subgroup, the genetic diversity is low. Genotype HTLV-1b is found in Centr

APA, Harvard, Vancouver, ISO, and other styles

39

Gaillard, Colette Marie, Sebastien David Pion, Hadjira Hamou, et al. "Detection of DNA of filariae closely related to Mansonella perstans in faecal samples from wild non-human primates from Cameroon and Gabon." Parasites & Vectors 13, no. 1 (2020). http://dx.doi.org/10.1186/s13071-020-04184-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Muyembe-Tamfum, J. J., S. Mulangu, Justin Masumu, J. M. Kayembe, A. Kemp, and Janusz T. Paweska. "Ebola virus outbreaks in Africa: Past and present." Onderstepoort J Vet Res 79, no. 2 (2012). http://dx.doi.org/10.4102/ojvr.v79i2.451.

Full text

Abstract:

Ebola haemorrhagic fever (EHF) is a zoonosis affecting both human and non-human primates (NHP). Outbreaks in Africa occur mainly in the Congo and Nile basins. The first outbreaks of EHF occurred nearly simultaneously in 1976 in the Democratic Republic of the Congo (DRC, former Zaire) and Sudan with very high case fatality rates of 88% and 53%, respectively. The two outbreaks were caused by two distinct species of Ebola virus named Zaire ebolavirus (ZEBOV) and Sudan ebolavirus (SEBOV). The source of transmission remains unknown. After a long period of silence (1980–1993), EHF outbreaks in Afric

APA, Harvard, Vancouver, ISO, and other styles

41

De, Abhishek, and Gregory D. Horwitz. "Spatial receptive field structure of double-opponent cells in macaque V1." Journal of Neurophysiology, January 6, 2021. http://dx.doi.org/10.1152/jn.00547.2020.

Full text

Abstract:

The spatial processing of color is important for visual perception. Double-opponent (DO) cells likely contribute to this processing by virtue of their spatially opponent and cone-opponent receptive fields (RFs). However, the representation of visual features by DO cells in the primary visual cortex of primates is unclear because the spatial structure of their RFs has not been fully characterized. To fill this gap, we mapped the RFs of DO cells in awake macaques with colorful, dynamic white noise patterns. The spatial RF of each neuron was fitted with a Gabor function and three versions of the

APA, Harvard, Vancouver, ISO, and other styles

42

"Spatial properties of neurons in the monkey striate cortex." Proceedings of the Royal Society of London. Series B. Biological Sciences 231, no. 1263 (1987): 251–88. http://dx.doi.org/10.1098/rspb.1987.0044.

Full text

Abstract:

Contrast sensitivity as a function of spatial frequency was determined for 138 neurons in the foveal region of primate striate cortex. The accuracy of three models in describing these functions was assessed by the method of least squares. Models based on difference-of-Gaussians (DOG) functions were shown to be superior to those based on the Gabor function or the second differential of a Gaussian. In the most general case of the DOG models, each subregion of a simple cell’s receptive field was constructed from a single DOG function. All the models are compatible with the classical observation t

APA, Harvard, Vancouver, ISO, and other styles

43

Schmidt, Fabian, Florian Liegeois, Edward J. D. Greenwood, et al. "Phyloepidemiological Analysis Reveals that Viral Divergence Led to the Paucity of Simian Immunodeficiency Virus SIVmus/gsn/mon Infections in Wild Populations." Journal of Virology 91, no. 6 (2017). http://dx.doi.org/10.1128/jvi.01884-16.

Full text

Abstract:

ABSTRACT Human immunodeficiency virus type 1 (HIV-1) is the result of cross-species transmission of simian immunodeficiency virus from chimpanzees (SIVcpz). SIVcpz is a chimeric virus which shares common ancestors with viruses infecting red-capped mangabeys and a subset of guenon species. The epidemiology of SIV infection in hominoids is characterized by low prevalences and an uneven geographic distribution. Surveys in Cameroon indicated that two closely related members of the guenon species subset, mustached guenons and greater spot-nosed guenons, infected with SIVmus and SIVgsn, respectively

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!