Time filter

Source Type

Moroni, Comoros

Nadhurou B.,University of Turin | Righini R.,University of Turin | Gamba M.,University of Turin | Laiolo P.,University of Turin | And 2 more authors.
ORYX | Year: 2015

The decline of the mongoose lemur Eulemur mongoz has resulted in a change of its conservation status from Vulnerable to Critically Endangered. Assessing the current threats to the species and the attitudes of the people coexisting with it is fundamental to understanding whether and how human impacts may affect populations. A questionnaire-based analysis was used to study the impact of agriculture and other subsistence activities, and local educational initiatives, on lemur abundance, group size and composition in the Comoros. On the islands of Mohéli and Anjouan we recorded 214 lemurs in 63 groups, the size and composition of which depended both on environmental parameters and the magnitude and type of anthropogenic pressure. There was no evidence of an impact of anthropogenic disturbance on abundance. In contrast, group size and composition were sensitive to human impacts. The most important threats were conflicts related to crop raiding, as well as illegal capture and hunting. The promotion of educational activities reduced the negative impact of hunting and illegal activities. These results highlight a need for urgent conservation measures to protect the species. Copyright © Fauna & Flora International 2015

Boussougou G.B.,University of Reunion Island | Brou Y.T.,UMRESPACE DEV IRD | Mohamed I.,University des Comores
CEUR Workshop Proceedings | Year: 2015

Agriculture production linked to population growth is one of the main motors of forest degradation in the World. In the Union of the Comoros, deforestation is particularly attributed to slash-and-burn farming as well as cultures in the forest and other uses of the forest such as charcoal production. In recent times, very few statistic and cartographic information is known concerning the spatiotemporal evolution of Comorian forests. The aim of this study is to highlight the changes in the forest cover by the use of high resolution spatial satellite images, on the period of 1995 to 2014, on the Isle of Anjouan: The most affected by the deforestation phenomena. The analysis of the results showed that from 1995 to 2014, the dense forests of Anjouan diminished by 7311 hectares at a rate of 8% per year. Linking the original anthropogenic factors and land-use maps show that the dynamics of the land-use are due to multiple factors like the rapid growth of the population. More and more pressure is applied on the lands due to the increased demands of agricultural products.

Hassani M.S.,University des Comores
Asian Biotechnology and Development Review | Year: 2011

The Comoros Archipelago markets ylang ylang essential oil, vanilla pods and cloves. During these last years, the prices of these commodities have slumped on the world market. While the Comoros Islands are known to have a rich and varied flora - second next to Madagascar in terms of endemic species, the potential for the exploitation of the flora has remained untapped. Thus, further exploration of the indigenous and endemic flora could unlock the potential of the aromatic plants currently being used in traditional medicine. It is also an undeniable fact that the preservation and diversification to the value-addition of aromatic plants can allow the Comoros Archipelago to make a very important impact on livelihoods especially to the women folks who are the primary agriculturalists. © 2011, RIS.

Said Hassane S.O.,Universite Ibn Tofail | Said Hassane S.O.,University des Comores | Said Hassane S.O.,French National Center for Scientific Research | Mansouri N.,University Sidi Mohammed Ben Abdellah | And 2 more authors.
Biotechnology, Agronomy and Society and Environment | Year: 2011

This work aims to study the antibacterial and antifungal activity and chemical composition of Plectranthus aromaticus essential oil from Grande Comore Island. This species has provided an essential oil with a yield of 1.31%. The chromatographic analysis (GC and GC/MS) of the essence of P. aromaticus has identified about 32 constituents which are the most dominant: the trans-verbenol (23.11%), carvacrol (22.96%) and 1,4-cineol (14.50%). The antimicrobial activity of this oil has been studied with respect to seven microorganisms. The essential oil of P. aromaticus has proven antibacterial and antifungal activity at low concentrations.

Marsden C.D.,University of California at Davis | Cornel A.,University of California at Davis | Lee Y.,University of California at Davis | Sanford M.R.,University of California at Davis | And 8 more authors.
Evolutionary Applications | Year: 2013

Considerable technological advances have been made towards the generation of genetically modified mosquitoes for vector control. In contrast, less progress has been made towards field evaluations of transformed mosquitoes which are critical for evaluating the success of, and hazards associated with, genetic modification. Oceanic islands have been highlighted as potentially the best locations for such trials. However, population genetic studies are necessary to verify isolation. Here, we used a panel of genetic markers to assess for evidence of genetic isolation of two oceanic island populations of the African malaria vector, Anopheles gambiae s.s. We found no evidence of isolation between the Bijagós archipelago and mainland Guinea-Bissau, despite separation by distances beyond the known dispersal capabilities of this taxon. Conversely, the Comoros Islands appear to be genetically isolated from the East African mainland, and thus represent a location worthy of further investigation for field trials. Based on assessments of gene flow within and between the Comoros islands, the island of Grande Comore was found to be genetically isolated from adjacent islands and also exhibited local population structure, indicating that it may be the most suitable site for trials with existing genetic modification technologies. © 2013 The Authors.

Discover hidden collaborations