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51. Range expansion of the invasive house mouseMus musculus domesticusin Senegal, West Africa: a synthesis of trapping data over three decades, 1983-2014

Author

Dalecky, Ambroise, primary, Bâ, Khalilou, additional, Piry, Sylvain, additional, Lippens, Cédric, additional, Diagne, Christophe A., additional, Kane, Mamadou, additional, Sow, Aliou, additional, Diallo, Mamoudou, additional, Niang, Youssoupha, additional, Konečný, Adam, additional, Sarr, Nathalie, additional, Artige, Emmanuelle, additional, Charbonnel, Nathalie, additional, Granjon, Laurent, additional, Duplantier, Jean-Marc, additional, and Brouat, Carine, additional

Published
2015
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52. Detection of Orientia sp. DNA in rodents from Asia, West Africa and Europe

Author

Cosson, Jean François, primary, Galan, Maxime, additional, Bard, Emilie, additional, Razzauti, Maria, additional, Bernard, Maria, additional, Morand, Serge, additional, Brouat, Carine, additional, Dalecky, Ambroise, additional, Bâ, Khalilou, additional, Charbonnel, Nathalie, additional, and Vayssier-Taussat, Muriel, additional

Published
2015
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53. Spatial Segregation between Invasive and Native Commensal Rodents in an Urban Environment: A Case Study in Niamey, Niger

Author

Garba, Madougou, primary, Dalecky, Ambroise, additional, Kadaoure, Ibrahima, additional, Kane, Mamadou, additional, Hima, Karmadine, additional, Veran, Sophie, additional, Gagare, Sama, additional, Gauthier, Philippe, additional, Tatard, Caroline, additional, Rossi, Jean-Pierre, additional, and Dobigny, Gauthier, additional

Published
2014
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54. Range expansion drive dispersal evolution in a three species symbiosis

Author

Léotard, Guillaume, Debout, Gabriel, Dalecky, Ambroise, Guillot, Sylvain, Gaume-Vial, Laurence, Mckey, Doyle, Kjellberg, Finn, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Paul-Valéry - Montpellier 3 (UM3)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)

Subjects
[SDE.BE.EVO]Environmental Sciences/Biodiversity and Ecology/domain_sde.be.evo, SDE:BE:EVO
Abstract

A-09-14; International audience; Background Recurrent climatic oscillations have produced dramatic changes in species distributions. This process has been proposed to be a major evolutionary force, shaping many life history traits of species, and to govern global patterns of biodiversity at different scales. During range expansions selection may favor the evolution of higher dispersal, and symbiotic interactions may be affected. It has been argued that a weakness of climate fluctuation-driven range dynamics at equatorial latitudes has facilitated the persistence there of more specialized species and interactions. However, how much the biology and ecology of species is changed by range dynamics has seldom been investigated, particularly in equatorial regions. Methodology/Principal Findings We studied a three-species symbiosis endemic to coastal equatorial rainforests in Cameroon, where the impact of range dynamics is supposed to be limited, comprised of two species-specific obligate mutualists –an ant-plant and its protective ant– and a species-specific ant parasite of this mutualism. We combined analyses of within-species genetic diversity and of phenotypic variation in a transect at the southern range limit of this ant-plant system. All three species present congruent genetic signatures of recent gradual southward expansion, a result compatible with available regional paleoclimatic data. As predicted, this expansion has been accompanied by the evolution of more dispersive traits in the two ant species. In contrast, we detected no evidence of change in lifetime reproductive strategy in the tree, nor in its investment in food resources provided to its symbiotic ants. Conclusions/Significance Despite the decreasing investment in protective workers and the increasing investment in dispersing females by both the mutualistic and the parasitic ant species, there was no evidence of destabilization of the symbiosis at the colonization front. To our knowledge, we provide here the first evidence at equatorial latitudes that biological traits associated with dispersal are affected by the range expansion dynamics of a set of interacting species.

Published
2009

55. Dynamics of species coexistence : maintenance of a plant-ant competitive metacommunity

Author

Debout, G.D.G., Dalecky, Ambroise, Ngomi Ngomi, A., and McKey, D.B.

Subjects
LEGUMINEUSE TROPICALE, FOURMI, COEVOLUTION, FECONDITE, MICROSATELLITE, STRUCTURE DE POPULATION, ABONDANCE, RELATION HOTE PARASITE, COEXISTENCE, INSECTE, STRUCTURE GENETIQUE, NICHE ECOLOGIQUE, MATURITE SEXUELLE, COMPETITION INTERSPECIFIQUE, CROISSANCE, DYNAMIQUE DE POPULATION, SYMBIOSE, METAPOPULATION, REPARTITION GEOGRAPHIQUE
Published
2009

56. Resistance evolution to Bt crops: predispersal mating of european corn borers

Author

Dalecky, Ambroise, Ponsard, Sergine, Bailey, Richard I., Pélissier, Céline, Bourguet, Denis, Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Laboratoire Dynamique de la Biodiversité (LADYBIO), Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology
Abstract

Over the past decade, the high-dose refuge (HDR) strategy, aimed at delaying the evolution of pest resistance to Bacillus thuringiensis (Bt) toxins produced by transgenic crops, became mandatory in the United States and is being discussed for Europe. However, precopulatory dispersal and the mating rate between resident and immigrant individuals, two features influencing the efficiency of this strategy, have seldom been quantified in pests targeted by these toxins. We combined mark-recapture and biogeochemical marking over three breeding seasons to quantify these features directly in natural populations of Ostrinia nubilalis, a major lepidopteran corn pest. At the local scale, resident females mated regardless of males having dispersed beforehand or not, as assumed in the HDR strategy. Accordingly, 0-67% of resident females mating before dispersal did so with resident males, this percentage depending on the local proportion of resident males (0% to 67.2%). However, resident males rarely mated with immigrant females (which mostly arrived mated), the fraction of females mating before dispersal was variable and sometimes substantial (4.8% to 56.8%), and there was no evidence for male premating dispersal being higher. Hence, O. nubilalis probably mates at a more restricted spatial scale than previously assumed, a feature that may decrease the efficiency of the HDR strategy under certain circumstances, depending for example on crop rotation practices.

Published
2006

57. Resistance evolution toBt crops : predispersal mating of european corn borers

Author

Dalecky, Ambroise, Ponsard, Sergine, Bailey, Richard I., Pélissier, Céline, Bourguet, Denis, Centre de biologie et de gestion des populations, Institut National de la Recherche Agronomique (INRA), Laboratoire Dynamique de la Biodiversité (LADYBIO), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)

Published
2006

58. Facultative polygyny in the plant-ant Petalomyrmex phylax (Hymenoptera: Formicinae): sociogenetic and ecological determinants of queen number

Author

Dalecky, Ambroise, Gaume, Laurence, Schatz, Bertrand, Mckey, Doyle, Kjellberg, Finn, Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), and Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])

Subjects
Ant-plant interactions, Rainforest, [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], [SDV]Life Sciences [q-bio], Myrmecophyte, Monogyny, Social insects, [SDE]Environmental Sciences, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Inbreeding, Relatedness, Cameroon, Nest site limitation, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Microsatellites, [SDV.EE.IEO]Life Sciences [q-bio]/Ecology, environment/Symbiosis
Abstract

A-05-28; In polygynous ants it has been proposed that the coexistence of several queens in a colony evolved as a response to ecological, social and genetic parameters. We present demographic, histological and genetic data showing that the plant-ant Petalomyrmex phylax is facultatively and secondarily polygynous. Polygyny is functional, lowers the reproductive output per queen, and is a kin-selected trait as new queens accepted in polygynous colonies are highly related females that never left their natal colony. The degree of polygyny varies according to a geographical gradient. Northern colonies can be strongly polygynous, while at the southern edge of the species' distribution, colonies are almost exclusively monogynous. However, ecological studies of the host-plant populations revealed that this cline could not be explained by variations in the degree of nest site limitation. We discuss selective costs and benefits associated with these social structures, and propose that this cline may result from historical processes such as selection of a more dispersive strategy along a colonization front

Published
2005

59. The trophic structure of tropical ant–plant–herbivore interactions: community consequences and coevolutionary dynamics

Author

Mckey, Doyle, Gaume, Laurence, Brouat, Carine, Gíusto, Bruno di, Pascal, Laurence, Debout, Gabriel, Dalecky, Ambroise, Heil, Martin, Burslem, David, Pinard, Michelle, Hartley, Sue, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut de Veille Sanitaire (INVS), Laboratoire Population-Environnement-Développement (LPED), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU), University of Aberdeen, Université Paul-Valéry - Montpellier 3 (UM3)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)

Subjects
0106 biological sciences, Mutualism (biology), [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Herbivore, Community, Ecology, [SDV]Life Sciences [q-bio], Biology, 010603 evolutionary biology, 01 natural sciences, Myrmecophyte, [SDE]Environmental Sciences, 14. Life underwater, Ecosystem diversity, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Trophic cascade, Coevolution, ComputingMilieux_MISCELLANEOUS, 010606 plant biology & botany, Trophic level, [SDV.EE.IEO]Life Sciences [q-bio]/Ecology, environment/Symbiosis
Abstract

International audience

Published
2005

61. Moraceae, Ficus, and associated fauna

Author

Dalecky, Ambroise, Kerdelhue, Carole, Johnson, Stéphanie, Razafindratsita, V.R., Grassi, C., Razafiarimala, A.C., Overdorff, D., Rasplus, Jean Yves, Unité de recherche Zoologie Forestière (URZF), Institut National de la Recherche Agronomique (INRA), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), S.M. Goodman (Editeur), and J.P. Benstead (Editeur)

Subjects
[SDV]Life Sciences [q-bio], BIOGEOGRAPHIE, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2003

66. Range expansion of the invasive house mouse M us musculus domesticus in Senegal, West Africa: a synthesis of trapping data over three decades, 1983-2014.

Author

Dalecky, Ambroise, Bâ, Khalilou, Piry, Sylvain, Lippens, Cédric, Diagne, Christophe A., Kane, Mamadou, Sow, Aliou, Diallo, Mamoudou, Niang, Youssoupha, Konečný, Adam, Sarr, Nathalie, Artige, Emmanuelle, Charbonnel, Nathalie, Granjon, Laurent, Duplantier, Jean-Marc, and Brouat, Carine

Subjects
*INTRODUCED species, *MICE ecology, *SPECIES diversity, *MAMMALS, *BIODIVERSITY
Abstract

The worldwide intensification of human-associated exchanges favours the multiplication of biological invasions. Among mammals, rodent species, including the house mouse M us musculus, are identified as major invaders with profound impacts on native biodiversity, human health and activities. Though contemporary rodent invasions are described on several islands, there are few data describing ongoing house mouse invasions in continental areas., We first outline the known picture of the distribution of the house mouse in Africa. We then describe the ongoing range expansion of the house mouse in Senegal, in order to update its distribution area, assess the location of the invasion front, describe the spatio-temporal dynamics of the invasion at the country scale and evaluate its impact on native small mammal communities., We briefly review the worldwide status of the house mouse, with special focus on its situation in Africa. Focusing on Senegal, we then use historical records and a large body of spatio-temporal indoor trapping data obtained from small mammal communities over the last 30 years to analyse the invasion dynamics of the subspecies at the scale of the country., The geographic range of the invasive house mouse is surprisingly poorly known in Africa. In Senegal, we document a large range expansion of the subspecies in human settlements over the whole country within the last 30 years. The invasion is still ongoing further east and south within the country, and has major consequences for small mammal communities and thus probably for risks associated with zoonotic diseases. [ABSTRACT FROM AUTHOR]

Published
2015
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70. Seroprevalence of Toxoplasma gondiiin commensal rodents sampled across Senegal, West Africa

Author

Brouat, Carine, Diagne, Christophe Amidi, Ismaïl, Khadija, Aroussi, Abdelkrim, Dalecky, Ambroise, Bâ, Khalilou, Kane, Mamadou, Niang, Youssoupha, Diallo, Mamoudou, Sow, Aliou, Galal, Lokman, Piry, Sylvain, Dardé, Marie-Laure, Mercier, Aurélien, Brouat, Carine, Diagne, Christophe Amidi, Ismaïl, Khadija, Aroussi, Abdelkrim, Dalecky, Ambroise, Bâ, Khalilou, Kane, Mamadou, Niang, Youssoupha, Diallo, Mamoudou, Sow, Aliou, Galal, Lokman, Piry, Sylvain, Dardé, Marie-Laure, and Mercier, Aurélien

Abstract

Risks related to Toxoplasma gondiiinfection in humans remain poorly known in Senegal. Although rodent surveys could help to assess the circulation of T. gondii, they have seldom been set up in sub-Saharan Africa. The aim of this study was to examine Toxoplasmaseroprevalence in rodents from villages and towns across Senegal. Rodents were sampled in 40 localities using a standardised trapping protocol. Detection of T. gondiiantibodies was performed on 1205 rodents, using a modified agglutination test (MAT) technique. Seroprevalence data were analysed depending on geography, the local rodent community, and individual characteristics of the rodent hosts. We found 44 seropositive rodents from four different species (Mastomys erythroleucus, Mastomys natalensis, Mus musculus domesticus, Rattus rattus). Toxoplasmaseroprevalence was low, averaging 4% in the localities. Higher Toxoplasmaseroprevalence (up to 24%) was found in northern Senegal, a region known to be the heart of pastoral herding in the country.

Published
2018
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71. Contemporary variations of immune responsiveness during range expansion of two invasive rodents in Senegal

Author

Ambroise Dalecky, Stéphane Cornet, Mbacké Sembène, Souleymane Doucoure, Laëtitia Husse, Nathalie Charbonnel, Khalilou Bâ, Emmanuelle Artige, Aliou Sow, Sylvain Piry, Odile Fossati-Gaschignard, Christophe Diagne, Mamadou Kane, Youssoupha Niang, Carine Brouat, Emmanuelle Gilot-Fromont, Mamoudou Diallo, Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Biodémographie évolutive, Département écologie évolutive [LBBE], Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR48, INSB-INSB-Centre National de la Recherche Scientifique (CNRS), Laboratoire Population-Environnement-Développement (LPED), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU), This work was supported by the ANR ENEMI project (ANR-11-JSV7-0006)., ANR-11-JSV7-0006,ENEMI,Conséquences évolutives des ennemis naturels dans des invasions biologiques majeures : le rôle des parasites dans le succès de l'invasion de deux rongeurs commensaux(2011), Institut des sciences biologiques (INSB-CNRS)-Institut des sciences biologiques (INSB-CNRS)-Centre National de la Recherche Scientifique (CNRS), dalecky, ambroise, and Jeunes Chercheuses et Jeunes Chercheurs - Conséquences évolutives des ennemis naturels dans des invasions biologiques majeures : le rôle des parasites dans le succès de l'invasion de deux rongeurs commensaux - - ENEMI2011 - ANR-11-JSV7-0006 - JCJC - VALID

Subjects
0106 biological sciences, 0301 basic medicine, [SDV.IMM] Life Sciences [q-bio]/Immunology, Range (biology), [SDE.MCG]Environmental Sciences/Global Changes, Zoology, Introduced species, 010603 evolutionary biology, 01 natural sciences, Invasive species, Life history theory, 03 medical and health sciences, Immune system, [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology, Ecology, Evolution, Behavior and Systematics, biology, Ecology, 15. Life on land, biology.organism_classification, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, [SDE.MCG] Environmental Sciences/Global Changes, 030104 developmental biology, Mastomys, biology.protein, [SDV.IMM]Life Sciences [q-bio]/Immunology, [SDV.BA.ZV] Life Sciences [q-bio]/Animal biology/Vertebrate Zoology, House mice, Antibody, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract

International audience; Biological invasions provide unique opportunities for studying life history trait changes over contemporary time scales. As spatial spread may be related to changes in parasite communities, several hypotheses (such as the evolution of increased competitive ability (EICA) or EICA-refi ned hypotheses) suggest immune changes in invasive species along invasion gradients. Although native hosts may be subject to similar changes in parasite selection pressures, their immune responses have been rarely investigated in invasion contexts. In this study, we evaluated immune variations for invasive house mice Mus musculus domesticus , invasive black rats Rattus rattus and native rodents Mastomys erythroleucus and Mastomys natalensis along well-characterised invasion gradients in Senegal. We focused on antibody-mediated (natural antibodies and complement) and infl ammatory (haptoglobin) responses. One invasion route was considered for each invasive species, and environmental conditions were recorded. Natural-antibody mediated responses increased between sites of long-established invasion and recently invaded sites only in house mice. Both invasive species exhibited higher infl ammatory responses at the invasion front than in sites of long-established invasion. Th e immune responses of native species did not change with the presence of invasive species. Th ese patterns of immune variations do not support the EICA and EICA refi ned hypotheses, and they rather suggest a higher risk of exposure to parasites on the invasion front. Altogether, these results provide a fi rst basis to further assess the role of immune changes in invasion success.

Published
2016

72. From human geography to biological invasions : the black rat distribution in the changing southeastern of Senegal

Author

Laurent Granjon, Ambroise Dalecky, Héloïse Lucaccioni, Jean Le Fur, Jean-Marc Duplantier, Pascal Handschumacher, Odile Fossati, Laboratoire Dynamiques Sociales et Recomposition des Espaces (LADYSS), Université Paris Diderot - Paris 7 (UPD7)-Université Paris Nanterre (UPN)-Université Paris 8 Vincennes-Saint-Denis (UP8)-Université Panthéon-Sorbonne (UP1)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche en Afrique (UMIFRE CNRS 24), Institut Français de Recherche en Afrique, UMIFRE CNRS 24, Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Laboratoire Population-Environnement-Développement (LPED), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU), Sciences Economiques et Sociales de la Santé & Traitement de l'Information Médicale (SESSTIM - U912 INSERM - Aix Marseille Univ - IRD), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM), ANR-11-CEPL-0010,CHANCIRA,CHANgements environnementaux, CIrculation de biens et de personnes : de l'invasion de réservoirs à l'apparition d'anthropozoonoses.le cas du RAt noir dans l'espace sénégalo-malien(2011), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris 8 Vincennes-Saint-Denis (UP8)-Université Paris Nanterre (UPN)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut de Recherche pour le Développement (IRD)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Aix Marseille Université (AMU), ANR-11-CEPL-0010,CHANCIRA,CHANgements environnementaux, CIrculation de biens et de personnes : de l'invasion de réservoirs à l'apparition d'anthropozoonoses. le cas du RAt noir dans l'espace sénégalo-malien(2011), dalecky, ambroise, and Changements Environnementaux Planétaires et Sociétés - CHANgements environnementaux, CIrculation de biens et de personnes : de l'invasion de réservoirs à l'apparition d'anthropozoonoses. le cas du RAt noir dans l'espace sénégalo-malien - - CHANCIRA2011 - ANR-11-CEPL-0010 - CEP&S - VALID

Subjects
0106 biological sciences, [SHS.GEO] Humanities and Social Sciences/Geography, lcsh:Medicine, Invasive Species, Social Sciences, Distribution (economics), Transportation, biological invasion, 01 natural sciences, Invasive species, Geographical Locations, Human geography, lcsh:Science, black rat, Spatial organization, Mammals, Multidisciplinary, Geography, Ecology, Animal Models, [SHS.GEO]Humanities and Social Sciences/Geography, Transportation Infrastructure, spatio-temporal dynamics, Senegal, 010601 ecology, Black rat, Vertebrates, Engineering and Technology, Research Article, zoonose, [SDE.MCG]Environmental Sciences/Global Changes, Context (language use), Biology, Research and Analysis Methods, Human Geography, Civil Engineering, Rodents, 010603 evolutionary biology, Rattus rattus, Model Organisms, Species Colonization, Animals, business.industry, lcsh:R, Ecology and Environmental Sciences, Organisms, Biology and Life Sciences, emergence risk, 15. Life on land, territorial systems, biology.organism_classification, [SDE.ES]Environmental Sciences/Environmental and Society, Roads, Rats, spatial diffusion, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, [SDE.MCG] Environmental Sciences/Global Changes, 13. Climate action, Amniotes, People and Places, Africa, Earth Sciences, Spatial ecology, Biological dispersal, lcsh:Q, [SDE.ES] Environmental Sciences/Environmental and Society, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, business
Abstract

International audience; In the contemporary context of zoonosis emergence and spread, invasive species are a major issue since they represent potential pathogen hosts. Even though many progresses have been done to understand and predict spatial patterns of invasive species, the challenge to identify the underlying determinants of their distribution remains a central question in invasion biology. This is particularly exacerbated in the case of commensal species that strictly depend on humankind for dispersal and perennial establishment of new populations. The distribution of these species is predicted to be influenced by dispersal opportunities and conditions acting on establishment and proliferation, such as environmental characteristics , including spatio-temporal components of the human societies. We propose to contribute to the understanding of the recent spread of a major invasive rodent species, the black rat (Rattus rattus), in the changing southeastern of Senegal. We address the factors that promote the dispersal and distribution of this invasive rodent from the perspective of human geography. We first describe characteristics of human settlements in terms of social and spatial organization of human societies (i.e. economic activities, commercial and agricultural networks, roads connectivity). We then explore the relationship between these characteristics and the distribution of this invasive rodent. Finally we propose that historical and contemporary dynamics of human societies have contributed to the risk of invasion of the black rat. We argue that the diffusion processes of invasive species cannot be considered as a result of the spatial structure only (i.e. connectivity and distance), but as a part of the human territory that includes the social and spatial organization. Results suggest that the distribution of invasive rodents partly results from the contemporary and inherited human socio-spatial systems, beyond the existence of suitable ecological conditions that are classically investigated by biologists.

Published
2016

73. Leishmania major and Trypanosoma lewisi infection in invasive and native rodents in Senegal.

Author

Cassan C, Diagne CA, Tatard C, Gauthier P, Dalecky A, Bâ K, Kane M, Niang Y, Diallo M, Sow A, Brouat C, and Bañuls AL

Subjects
Animals, Humans, Introduced Species, Leishmania major genetics, Leishmaniasis, Cutaneous parasitology, Leishmaniasis, Cutaneous transmission, Mice, Rats, Rodentia, Senegal epidemiology, Trypanosoma lewisi genetics, Trypanosomiasis parasitology, Trypanosomiasis transmission, Zoonoses, Disease Reservoirs parasitology, Leishmania major isolation & purification, Leishmaniasis, Cutaneous epidemiology, Trypanosoma lewisi isolation & purification, Trypanosomiasis epidemiology
Abstract

Bioinvasion is a major public health issue because it can lead to the introduction of pathogens in new areas and favours the emergence of zoonotic diseases. Rodents are prominent invasive species, and act as reservoirs in many zoonotic infectious diseases. The aim of this study was to determine the link between the distribution and spread of two parasite taxa (Leishmania spp. and Trypanosoma lewisi) and the progressive invasion of Senegal by two commensal rodent species (the house mouse Mus musculus domesticus and the black rat Rattus rattus). M. m. domesticus and R. rattus have invaded the northern part and the central/southern part of the country, respectively. Native and invasive rodents were caught in villages and cities along the invasion gradients of both invaders, from coastal localities towards the interior of the land. Molecular diagnosis of the two trypanosomatid infections was performed using spleen specimens. In the north, neither M. m. domesticus nor the native species were carriers of these parasites. Conversely, in the south, 17.5% of R. rattus were infected by L. major and 27.8% by T. lewisi, while very few commensal native rodents were carriers. Prevalence pattern along invasion gradients, together with the knowledge on the geographical distribution of the parasites, suggested that the presence of the two parasites in R. rattus in Senegal is of different origins. Indeed, the invader R. rattus could have been locally infected by the native parasite L. major. Conversely, it could have introduced the exotic parasite T. lewisi in Senegal, the latter appearing to be poorly transmitted to native rodents. Altogether, these data show that R. rattus is a carrier of both parasites and could be responsible for the emergence of new foci of cutaneous leishmaniasis, or for the transmission of atypical human trypanosomiasis in Senegal., Competing Interests: The authors have declared that no competing interests exist.

Published
2018
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74. Resistance evolution to Bt crops: predispersal mating of European corn borers.

Author

Dalecky A, Ponsard S, Bailey RI, Pélissier C, and Bourguet D

Subjects
Animals, Bacterial Toxins genetics, Crops, Agricultural, Female, Male, Plants, Genetically Modified genetics, Zea mays, Insecticide Resistance, Lepidoptera physiology, Sexual Behavior, Animal physiology
Abstract

Over the past decade, the high-dose refuge (HDR) strategy, aimed at delaying the evolution of pest resistance to Bacillus thuringiensis (Bt) toxins produced by transgenic crops, became mandatory in the United States and is being discussed for Europe. However, precopulatory dispersal and the mating rate between resident and immigrant individuals, two features influencing the efficiency of this strategy, have seldom been quantified in pests targeted by these toxins. We combined mark-recapture and biogeochemical marking over three breeding seasons to quantify these features directly in natural populations of Ostrinia nubilalis, a major lepidopteran corn pest. At the local scale, resident females mated regardless of males having dispersed beforehand or not, as assumed in the HDR strategy. Accordingly, 0-67% of resident females mating before dispersal did so with resident males, this percentage depending on the local proportion of resident males (0% to 67.2%). However, resident males rarely mated with immigrant females (which mostly arrived mated), the fraction of females mating before dispersal was variable and sometimes substantial (4.8% to 56.8%), and there was no evidence for male premating dispersal being higher. Hence, O. nubilalis probably mates at a more restricted spatial scale than previously assumed, a feature that may decrease the efficiency of the HDR strategy under certain circumstances, depending for example on crop rotation practices.

Published
2006
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