%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Berthier, K.
%A Garba, M.
%A Leblois, R.
%A Navascues, M.
%A Tatard, C.
%A Gauthier, Philippe
%A Gagare, S.
%A Piry, S.
%A Brouat, Carine
%A Dalecky, Ambroise
%A Loiseau, A.
%A Dobigny, Gauthier
%T Black rat invasion of inland Sahel : insights from interviews and population genetics in south-western Niger
%D 2016
%L fdi:010068711
%G ENG
%J Biological Journal of the Linnean Society
%@ 0024-4066
%K Africa ; Rattus rattus ; trade-mediated invasion ; urban habitat
%K NIGER ; SAHEL
%M ISI:000388505600001
%N 4
%P 748-765
%R 10.1111/bij.12836
%U https://www.documentation.ird.fr/hor/fdi:010068711
%> https://www.documentation.ird.fr/intranet/publi/2016/12/010068711.pdf
%V 119
%W Horizon (IRD)
%X Human population migrations, as well as long-distance trade activities, have been responsible for the spread of many invasive organisms. The black rat, Rattus rattus, has colonized most of the world following ship-mediated trade. Owing to its tight association with human infrastructures, this species has been able to survive in unfavourable environments, such as Sahelian Africa. In this work, we combined interview-based and population genetic surveys to investigate the processes underlying the ongoing invasion of south-western Niger by black rats, with special emphasis on the capital city, Niamey. Our trapping and interview data are quite congruent, and all together point towards a patchy, but rather widespread, current distribution of R. rattus. Genetic data strongly suggest that road network development for truck-based commercial flow from/to international harbours located in neighbouring countries (Benin, Togo, and Nigeria) facilitates the passive dispersal of black rats over a long distance through unfavourable landscapes. Another potentially, more ancient, invasion route may be associated with boat transport along the Niger River. Human-mediated dispersal thus probably allows the foundation of persisting populations within highly anthropized areas while population dynamics may be more unstable in remote areas and mostly depends on propagule pressure.
%$ 080 ; 102