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| Registros recuperados: 22 | |
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| Breteler, F.J.; Wieringa, J.J.. |
| The amphi-atlantic genus Mendoncia of the Acanthaceae counts c. 80 species. In tropical Africa it is represented by 14 species, eight in continental Africa and six in Madagascar. The remaining species occur in tropical America. The new species Mendoncia camerounensis and M. rabiensis are described and illustrated. Mendoncia floribunda is resurrected, fully described, and illustrated as well. Mendoncia iodioides, reduced to a variety of M. phytocrenoides in the Flore du Gabon, is restored as a distinct species. The isolated western population of Mendoncia gilgiana is recognised as a new subspecies. The conservation status of all species is assessed. Only a few of them are classified as Least Concern, the others as ranging from Critically Endangered to... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cameroon; Gabon; Key; Mendoncia; New species; New subspecies; Taxonomy. |
| Ano: 2018 |
URL: http://www.repository.naturalis.nl/record/655988 |
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| Mintsa Nguema, Rodrigue; Mavoungou, Jacques F.; Ngou-milama, Krystina Mengue Me; Mamfoumbi, Modeste Mabicka; Koumba, Aubin A.; Lamine, Mariama Sani; Diarra, Abdoulaye; Asseko, Ghislaine Nkone; Mourou, Jean R.; Akotet, Marielle K. Bouyou; Mone, Helene; Mouahid, Gabriel; Atsame, Julienne. |
| In order to follow the Preventive Chemotherapy (PC) for the transmission control as recommended by WHO, Gabon initiated in 2014 the mapping of Schistosomiasis and Soil Transmitted Helminthiasis (STH). Here, we report the results of the Northern and Eastern health regions, representing a third of the land area and 12% of its total population. All nine departments of the two regions were surveyed and from each, five schools were examined with 50 schoolchildren per school. The parasitological examinations were realized using the filtration method for urine and the Kato-Katz technique for stool samples. Overall 2245 schoolchildren (1116 girls and 1129 boys), mean aged 11.28 +/- 0.04 years, were examined. Combined schistosomiasis and STH affected 1270 (56.6%)... |
| Tipo: Text |
Palavras-chave: Schistosomiasis; Soil-transmitted-helminthiasis; Mapping; Preventive chemotherapy; Transmission control; Gabon; Central Africa. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00660/77212/78691.pdf |
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| Duperron, Sebastien; Nadalig, Thierry; Caprais, Jean-claude; Sibuet, Myriam; Fiala Medioni, Aline; Amann, Rudolf; Dubilier, Nicole. |
| Deep-sea mussels of the genus Bathymodiolus (Bivalvia: Mytilidae) harbor symbiotic bacteria in their gills and are among the dominant invertebrate species at cold seeps and hydrothermal vents. An undescribed Bathymodiolus species was collected at a depth of 3,150 m in a newly discovered cold seep area on the southeast Atlantic margin, close to the Zaire channel. Transmission electron microscopy, comparative 16S rRNA analysis, and fluorescence in situ hybridization indicated that this Bathymodiolus sp. lives in a dual symbiosis with sulfide- and methane-oxidizing bacteria. A distinct distribution pattern of the symbiotic bacteria in the gill epithelium was observed, with the thiotrophic symbiont dominating the apical region and the methanotrophic symbiont... |
| Tipo: Text |
Palavras-chave: Gabon; Southeast Atlantic; Methane seep; Hydrothermal vent; Deep sea; RRNA analysis; Methane concentration; Gill epithelium; Symbiosis; Bacteria; Mytilidae. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-1266.pdf |
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| Schleicher, Judith; Department of Geography, University of Cambridge, Downing Place, Cambridge CB2 3EN, UK; School of Geography and the Environment, University of Oxford, S Parks Road, Oxford OX1 3QY, UK; schleicher.judith@gmail.com; Hymas, Olivier; Human Ecology Research Group, Department of Anthropology, University College London, UK; Institute of Zoology, Zoological Society of London, UK; ohymas@onetel.com; Coad, Lauren; Environmental Change Institute, School of Geography and the Environment, Oxford University, UK; Center for International Forestry Research, Bogor, Indonesia; lauren.coad@ouce.ox.ac.uk. |
| Addressing today’s environmental challenges is intimately linked to understanding and improving natural resource governance institutions. As a result conservation initiatives are increasingly realizing the importance of integrating local perspectives of land tenure arrangements, natural resource rights, and local beliefs into conservation approaches. However, current work has not sufficiently considered the dynamic nature of natural resource governance institutions over time and the potential implications for current conservation interventions. We therefore explored how and why hunting governance has changed since the precolonial period in two ethnic hunting communities in Gabon, Central Africa, integrating various ethnographic methods with... |
| Tipo: Peer-Reviewed article |
Palavras-chave: Bushmeat; Gabon; Historical ecology; Hunting; Natural resource governance. |
| Ano: 2015 |
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| Winter, A.J. de. |
| As presently used, the helicarionoid genus Thapsia Albers, 1860 embraces a large, heterogeneous assemblage of species. As a first step in the revision of this group of taxa, the genus Thapsia (type species Helix troglodytes Morelet, 1848) is redefined anatomically and conchologically. In the absence of alcohol-preserved material of T. troglodytes, Thapsia ebimimbangana spec. nov. from Cameroon and T. wieringai spec. nov. from Gabon are described to characterize the soft parts morphology of Thapsia. Three new genera are introduced, viz. Saphtia gen. nov. (type species S. granulosa spec. nov.), Pseudosaphtia gen. nov. (type species P. brunnea spec. nov.) and Vanmolia gen. nov. (type species Thapsia sjoestedti d’Ailly, 1896). A second species of Saphtia, S.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cameroon; Côte d'Ivoire; Gabon; Africa; Gastropoda; Taxonomy; Land snails; Helicarionoidea; Thapsia; Saphtia; Pseudosaphtia; Vanmolia; Urocyclidae; 42.73. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/273964 |
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| Ondreas, Helene; Olu, Karine; Fouquet, Yves; Charlou, Jean-luc; Gay, Aurelien; Dennielou, Bernard; Donval, Jean-pierre; Fifis, Alexis; Nadalig, Thierry; Cochonat, Pierre; Cauquil, E; Bourillet, Jean-francois; Le Moigne, Morgan; Sibuet, Myriam. |
| A giant, 800-m wide pockmark, called Regab, was discovered along the Equatorial African margin at 3160-m water depth and was explored by remote operated vehicle (ROV) as part of the Zaiango (1998-2000) and Biozaire (2001-2003) projects carried out conjointly by TOTAL and a number of French research institutes. A microbathymetric map obtained using the ROV sensors shows that the pockmark actually consists of a cluster of smaller pockmarks aligned N70 along a 15-m deep depression. Methane was recorded all over the pockmark, the highest values along the axis of the depression where massive carbonate crusts and dense seep communities were also found. Several faunal species belong to the Vesicomyidae and Mytilidae bivalve families, as well as to Siboglinidae... |
| Tipo: Text |
Palavras-chave: Gabon; Microbathymetric map; ROV; Exploration; Pockmark; Equatorial African margin. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-1239.pdf |
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| Damen, T.H.J.; Burg, W.J. van der; Wiland-Szymańska, J.; Sosef, M.S.M.. |
| In preparing the treatment of Dracaena for Flore du Gabon and Flore d’Afrique centrale, a relatively high number of taxonomic and nomenclatural novelties were discovered; these are presented here. Within Dracaena five species and one forma are described as new, D. bushii, D. haemanthoides, D. marina, D. wakaensis, D. waltersiae and D. laxissima forma aureilicia. Each new species is provided with a full description and taxonomic notes. Apart from that, five species are reinstated, D. braunii, D. nitens, D. perrottetii, D. tholloniana and D. usambarensis. A further 23 names are treated here as a synonym for the first time: D. bequaertii, D. buettneri, D. cuspidibracteata, D. densifolia, D. gabonica, D. gazensis, D. ledermannii, D. letestui, D. litoralis, D.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Africa; Central Africa; Dracaena; Gabon; Lucky Bamboo; New species; Taxonomy. |
| Ano: 2018 |
URL: http://www.repository.naturalis.nl/record/650130 |
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| Bissiengou, P.; Chatrou, L.W.; Wieringa, J.J.; Sosef, M.S.M.. |
| Four new species, one with two subspecies, of the genus Campylospermum are described, all endemic or sub-endemic to Gabon. These are C. auriculatum, C. gabonensis, C. gabonensis subsp. australis, C. glaucifolium and C. occidentalis. Distribution maps and scans of the holotypes are provided as well as preliminary IUCN Red List assessments. New combinations for nine species formerly assigned to the genus Ouratea and/or Gomphia are proposed: C. andongensis, C. glomeratum, C. longestipulatum, C. lunzuensis, C. lutambensis, C. nutans, C. plicatum and C. warneckei. Finally, one taxon is raised from the variety to species level, leading to the new combination C. costatum. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Africa; Campylospermum; Conservation; Gabon; Gomphia; IUCN Red List; Ochnaceae; Ouratea; Taxonomy. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/525772 |
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| Dupre, Stephanie; Bertotti, Giovanni; Cloetingh, Sierd. |
| An integrated study of the South Gabon Margin (South Atlantic) based on reflection seismic and well data has been performed to quantify tectonic activity. A regional profile crossing the entire basin together with subsidence analysis, highlights important aspects of the post-rift history. The most striking event in the margin evolution appears to be the anomalous extra subsidence during the early post-rift period characterized by high sedimentation rates, equivalent to one third of the syn-rift subsidence. Although the presence of evaporite layers restricts knowledge of the underlying structures essentially composed of pre-rift and syn-rift sequences, the outcome of this post-rift tectonic study has strong implications for the rifting history. The early... |
| Tipo: Text |
Palavras-chave: Post-rift subsidence; Margin; Gabon. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-6803.pdf |
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| Registros recuperados: 22 | |
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