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Akomo-Okoue E.F.,Kyoto University | Akomo-Okoue E.F.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | Inoue E.,Kyoto University | Atteke C.,Universite des Sciences et Techniques de Masuku | And 4 more authors.
Mammal Research | Year: 2015

We investigated the relative abundance of four duiker species and the environmental effect including human impacts on their abundance in the forest of Moukalaba, Gabon. We counted and collected fresh faeces from duikers in thirteen 2-km line transects established in different types of vegetation. Genetic species identification showed that blue duiker (Philantomba monticola), Ogilby’s duiker (Cephalophus ogilbyi, which might include the sister species Peter’s duiker Cephalophus callipygus), bay duiker (Cephalophus dorsalis), and yellow-backed duiker (Cephalophus silvicultor) coexisted. Genetic analyses successfully identified Ogilby’s and bay duiker, which are difficult to discriminate using other methods. The blue, Ogilby’s, and yellow-backed duikers were found in all transects. The dung abundance of bay duiker was quite low compared to other duiker species. This result suggests the importance of accumulating information regarding the abundance of each duiker species for updating their conservation status. The dung count method with genetic species identification may be useful for this purpose. The dung abundance of Ogilby’s duikers and blue duikers was affected by human impacts, while that of yellow-backed duikers was not affected by human impacts. The dung abundance of Ogilby’s duikers was lower in young secondary forests, which are regenerating after significant human disturbance. In contrast, generalized liner mixed model showed that the dung abundance of blue duikers was not affected by vegetation type and was lower in transects nearer to the villages, which might be due to past hunting activity. The difference in human impacts among duiker species should be considered for their conservation management. © 2015, Mammal Research Institute, Polish Academy of Sciences, Białowieża, Poland.

Hongo S.,Kyoto University | Nakashima Y.,Kyoto University | Nakashima Y.,Nihon University | Akomo-Okoue E.F.,Kyoto University | And 3 more authors.
International Journal of Primatology | Year: 2016

The correlates of variation in the number of males in primate groups form a long-standing question in primatology. We investigated female reproductive seasonality and the numbers of males in groups of wild mandrills (Mandrillus sphinx) in a 25-month camera-trap survey with 160 camera locations in Moukalaba-Doudou National Park, Gabon. We used 1760 videos to analyze group composition, including the presence of females with newborn infants and with sexual swellings, the number of males present in groups, and male spatial positioning in groups. Female reproduction was seasonal, with a peak in the number of newborns in the mid-rainy season and a peak in the number of females with sexual swellings in the early dry season. The number of males in the group increased in the dry season, with a much greater increase in the number of mature males (sevenfold) than in submature males (twofold). The peak number of mature males, but not submature males, in the group lagged significantly behind the peak in the number of females with sexual swellings, suggesting that submature males enter groups before mature males and/or that mature males stay in the group longer after the peak of females with sexual swellings. Mature, but not submature, males appeared frequently near females with sexual swellings. In conclusion, we found a clear relationship between the presence of receptive females and the number of males in the group, and evidence that male competitive ability influences male strategies. © 2016 Springer Science+Business Media New York

Mone H.,CNRS Host-Pathogen-Environment Interactions Laboratory | Holtfreter M.C.,Heinrich Heine University Dusseldorf | Allienne J.-F.,CNRS Host-Pathogen-Environment Interactions Laboratory | Mintsa-Nguema R.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | And 6 more authors.
Parasitology Research | Year: 2015

This study concerns the first urinary schistosomiasis case observed in Corsica (France, Europe) occurring in a 12-year-old German boy. The aim was to identify the relationship between this Schistosoma haematobium infection and other schistosomes of the Schistosoma group with terminal-spined ova. Morphological and molecular analyses were conducted on the ova. The results showed that the schistosome responsible for the emergence of schistosomiasis in Corsica was due to S. haematobium introgressed by genes from S. bovis. © 2015, Springer-Verlag Berlin Heidelberg.

Konate K.,University of Ouagadougou | Ouedraogo M.,University of Ouagadougou | Mavoungou J.F.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | Lepengue A.N.,Universite des Sciences et Techniques de Masuku | And 3 more authors.
International Journal of Phytomedicine | Year: 2012

The present study was conducted to evaluate the pharmacological and toxic effects of aqueous acetone extract of Sida alba L. a Malvaceae species, in mice Swiss and albinos Wistar rats. In acute toxicity test, mice received doses of this extract by intraperitoneal route with LD50 value of 3200 mg/kg. In sub-acute toxicity test, albinos Wistar rats were treat by gavage during 28 days with different doses of aqueous acetone extracts of Sida alba L., (75, 100 and 150 mg/kg). About to the pharmacological properties, the results varied widely in dose of extract and weight of rats and did not show clinical correlations. We undertook this study of extracts in order to provide a scientific basis for the traditional use of Sida alba L., in traditional medicine particularly to treat hepatitis B. Our results of this study appeared to show the safety of acute and sub-acute toxicities of extract from Sida alba L., which can therefore be continuously used with safety in traditional medicine. Statistical studies revealed that there is a low significant difference in body and organ weights, and biological parameters between control group and the treated assay groups (p<0.01 or p<0.05).

Konate K.,University of Ouagadougou | Ouedraogo M.,University of Ouagadougou | Ouattara M.B.,University of Ouagadougou | Dibala I.C.,University of Ouagadougou | And 5 more authors.
Research Journal of Applied Sciences, Engineering and Technology | Year: 2012

The present study was conducted to evaluate the hepatoprotective effects of aqueous acetone extract of Cienfuegosia digitata Cav. (Malvaceae) an herbal plant used in Burkina Faso to treat traditionally liver disease in albinos Wistar rats. Animals received by gavage 25, 50 and 100 mg/kg body weight of extract daily for a period of 28 days. Control groups received alcohol 35% and water. In vivo administration of 35% ethanol for a period of 28 days in rats showed an activity of liver marker enzymes (AST, ALT, ALP and GGT), triglycerides, total cholesterol, total bilirubin and direct bilirubin in serum compared with rats which received water (control water). However, administration of 35% ethanol along with aqueous acetone extract decreased the activities of liver markers enzyme in serum comparatively to the control water group (p<0.05 or p<0.01). We noticed that extract at a dose of 100 mg/kg body weight was highly effective than 25 and 50 mg/kg body weight compared to the control water group (ALT and ALP; p>0.05 and p<0.05). This study revealed that Cienfuegosia digitata presents a hepatoprotective potential and this plant could be traditionally exploited in the treatment of liver disease particularly hepatitis B in Burkina Faso. © Maxwell Scientific Organization, 2011.

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