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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
Maritime international trade and bioinvasions: A three-year long survey of small mammals in Autonomous Port of Cotonou, Benin
Journal of Applied Ecology, Year 2023
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Description
International trade has been favouring the dissemination of a wide suite of invasive alien species. Upstream prevention through the monitoring of entry points is identified as an appropriate strategy to achieve control of bioinvasions and their consequences. Maritime transportation has been responsible for the introduction worldwide of exotic rodents that are major pests for crops and food stocks as well as reservoirs of many zoonotic pathogens. In order to limit further dissemination, the International Health Regulation constrains decisions makers and socio-economic stakeholders to manage ship-mediated import/export of rodents within seaports. Unfortunately, eco-evolutionary insights into rodent introduction events that could guide preventive actions in seaports are very scarce. In order to bridge this gap, we here describe the results of a 3 year-long survey of small mammals conducted in the Port of Cotonou, Benin. Our aim was to assess the spatiotemporal distribution, diversity and relative abundance of invasive and native rodents. 960 small mammal individuals were captured in nine within-seaport sites. We found (i) a marked predominance of invasive species (84% of the individuals belonging to Mus musculus, Rattus rattus, R. norvegicus), (ii) with native species (i.e. Mastomys natalensis and the shrew Crocidura olivieri) essentially restricted to peripheral non-industrial areas, as well as (iii) a fine-scale spatial segregation stable over time between the invasive Norway rats and house mice on the one hand, and the black rats and shrews on the other hand. Furthermore, trapping before and after two successive rodent control campaigns indicates that they were ineffective and that subsequent rodent recolonisation occurred 6–12 months following intervention. Synthesis and applications. Our results are discussed in terms of ecological processes at play (e.g. interspecific interactions) and operational recommendations (e.g. assessment of proper eradication units, environmental modifications). © 2023 The Authors. Journal of Applied Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society.
Authors & Co-Authors
Badou, Sylvestre Adjakou
Benin, Cotonou
University of Abomey-calavi
France, Marseille
Ird Institut de Recherche Pour le Developpement
Missihoun, Antoine Abel
Benin, Cotonou
University of Abomey-calavi
Agbangla, Clément
Benin, Cotonou
University of Abomey-calavi
Gauthier, Philippe
France, Marseille
Ird Institut de Recherche Pour le Developpement
Houemenou, Gualbert
Benin, Cotonou
University of Abomey-calavi
Dossou, Henri Joel
Benin, Cotonou
University of Abomey-calavi
Etougbétché, Jonas Raoul
Benin, Cotonou
University of Abomey-calavi
Adamjy, Tasnime
France, Marseille
Ird Institut de Recherche Pour le Developpement
Hima, Karmadine
Niger, Niamey
Universite Abdou Moumouni
Diagne, Christophe Amidi
France, Marseille
Ird Institut de Recherche Pour le Developpement
Besnard, Aurélien G.
France, Montpellier
Universite Paul-valery Montpellier Iii
Dalecky, Ambroise
France, Marseille
Aix Marseille Université
France, Paris
Cirad
Dobigny, Gauthier
Madagascar, Antananarivo
Institut Pasteur de Madagascar
Statistics
Authors: 13
Affiliations: 7
Identifiers
Doi:
10.1111/1365-2664.14557
ISSN:
00218901
Research Areas
Food Security
Infectious Diseases
Study Design
Randomised Control Trial
Cross Sectional Study
Study Approach
Quantitative
Study Locations
Benin