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1. Une nouvelle puce du genre Allopsylla Beaucournu et Fain, 1982 (Siphonaptera : Ischnopsyllidae) en République Centrafricaine, sur un chiroptère Molossidae méconnu

Author

Barrière P., Beaucournu J.C., Ménier K., and Colyn M.

Subjects
Allopsylla lobayensis sp. n., Siphonaptera, Ischnopsyllidae, Myopterus whitleyi, forêt de Ngotto, République Centrafricaine, Infectious and parasitic diseases, RC109-216
Abstract

Un couple d'Allopsylla lobayensis Beaucournu et Barrière sp. n. a été récolté le 1er novembre 1999 en forêt de Ngotto, dans la partie sud-ouest du bassin de la Lobaye, République Centrafricaine (RCA). Le spécimen hôte, un chiroptère molossidé méconnu (Myopterus whitleyi), constitue la première collecte de l'espèce en RCA. La nouvelle puce s'apparente à A. hetera Beaucournu et Fain, 1982, l'une des deux autres espèces du genre Allopsylla connues jusqu'alors de régions fauniques distinctes (A. alloides au Nigéria et A. hetera en République Démocratique du Congo). L'identification de trois hôtes parmi les trois espèces d'Allopsylla interpelle sur la spécificité hôte-parasite au sein de ce groupe.

Published
2002
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5. New status for two African giant forest shrews, Crocidura goliath goliath and C. goliath nimbasilvanus (Mammalia: Soricomorpha), based on molecular and geometic morphometric analyses

Author

Jacquet, F., Hutterer, R., Nicolas, V., Decher, J., Colyn, M., Couloux, A., Denys, C., Origine, structure et évolution de la biodiversité (OSEB), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Zoologisches Forschungmuseum A. Koenig, Department Biology, University of Vermont, University of Vermont [Burlington], Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO), Université de Rennes (UR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Genoscope - Centre national de séquençage [Evry] (GENOSCOPE), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Consortium national de recherche en Génomique, Service de systématique moléculaire du MNHN, Plateforme de Morphométrie du MNHN, Action Transversale du Muséum: Taxonomie moléculaire, DNA barcode & Gestion Durable des Collections du MNHN, Projet 'Macrophylogeny of life' Genoscope/MNHN, Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)

Subjects
Crocidura nimbasilvanus, African giant shrew, Soricidae, African giant shrew, Crocidura goliath, Crocidura nimbasilvanus, geometric morphometrics, Soricidae, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, geometric morphometrics, Crocidura goliath
Abstract

Crocidura goliath nimbasilvanus Hutterer, 2003 (replacement name for C. odorata guineensis Heim de Balsac, 1968) from West Africa (Guinea, Liberia, Ivory Coast) and Crocidura goliath goliath Thomas, 1906 from Central Africa (Cameroon, Central African Republic, Gabon, Republic of Congo, Democratic Republic of Congo) were regarded as members of a single species until recently. A phylogenetic analysis including three mitochondrial (16S, cytb and COI) and one nuclear marker (BRCA) shows that C. g. nimbasilvanus is the sister taxon of C. nimbae, a species also endemic to West Africa. Crocidura g. goliath is part of the C. olivieri group and closely related to C. olivieri, C. viaria and C. fulvastra. Calculation of genetic distances between cytb sequences confirms this pattern (divergence of 13.5% between C. g. nimbasilvanus and C. g. goliath). An analysis of 112 skulls using morphometric geometrics provides evidence of marked shape differences between the two taxa. Despite close external morphological resemblances, we found diagnostic external and craniodental characters between these two forms. We therefore propose to treat C. nimbasilvanus and C. goliath as distinct species. Similar morphological features exhibited by these two African giant forest shrews, especially their large size, may be the result of homoplasy due to convergent evolutionary pressure. We also investigated the phenotypic diversification in size and skull shape within C. goliath and discovered strong intraspecific variability.Key words: Soricidae, African giant shrew, Crocidura goliath, Crocidura nimbasilvanus, geometric morphometrics.

Published
2013

6. Identification of illegally introduced deer and their source populations: a European perspective

Author

Frantz, C.A., Zachos, F.E., Šprem, Nikica, Kuhn, R., Skog, A., Colyn, M., Chaumont, F., Flamand, M.C., and C. Denys

Subjects
Cervus elaphus, population stricture, illegall translocation
Abstract

Red deer (Cervus elaphus) have been subjected to anthropogenic interference for many centuries. Most populations are manages according to hunting schedules, some are kept long-term in enclosures and other extinct, or nearly extinct, populations have been restocked with foreign deer. Moreover, it has been shown previously that farmed red deer have been released illegally in some areas, probably for hunting purposes. Here, we used microsatellites to genotype red deer from 32 different localities across Europe, as well as from one deer farm from northwestern France. Using a geographically explicit genetic assignment method, we show that the farmed deer originated from Scotland, as well as from Eastern Europe. Deer previously excluded from a population in Belgium-Germany-Luxemburg were also assigned to the UK, confirming that it was very likely that they originated from a deer farm. Furthermore, we found evidence of releases of farmed deer in other European populations. We have generated a tool that should allow identification of illegally releases of farmed deer in any European population.

Published
2011

8. Multicollinearity in spatial genetics: separating the wheat from the chaff using commonality analyses.

Author

UCL - SST/ISV - Institut des sciences de la vie, Prunier, J G, Colyn, M, Legendre, X, Nimon, K F, Flamand, Marie-Christine, UCL - SST/ISV - Institut des sciences de la vie, Prunier, J G, Colyn, M, Legendre, X, Nimon, K F, and Flamand, Marie-Christine

Abstract

Direct gradient analyses in spatial genetics provide unique opportunities to describe the inherent complexity of genetic variation in wildlife species and are the object of many methodological developments. However, multicollinearity among explanatory variables is a systemic issue in multivariate regression analyses and is likely to cause serious difficulties in properly interpreting results of direct gradient analyses, with the risk of erroneous conclusions, misdirected research and inefficient or counterproductive conservation measures. Using simulated data sets along with linear and logistic regressions on distance matrices, we illustrate how commonality analysis (CA), a detailed variance-partitioning procedure that was recently introduced in the field of ecology, can be used to deal with nonindependence among spatial predictors. By decomposing model fit indices into unique and common (or shared) variance components, CA allows identifying the location and magnitude of multicollinearity, revealing spurious correlations and thus thoroughly improving the interpretation of multivariate regressions. Despite a few inherent limitations, especially in the case of resistance model optimization, this review highlights the great potential of CA to account for complex multicollinearity patterns in spatial genetics and identifies future applications and lines of research. We strongly urge spatial geneticists to systematically investigate commonalities when performing direct gradient analyses.

Published
2014

9. Compared phylogeography of two forest rodent sibling species (Praomys rostratus and P. tullbergi) in West Africa: Differential reactions to past forest fragmentation

Author

Nicolas, V., Bryja, J., Akpatou, B., Konecny, A., Emilie, Lecompte, Colyn, M., Lalis, A., Couloux, A., Denys, C., Granjon, L., Evolution et Diversité Biologique (EDB), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées

Subjects
[SDV.EE]Life Sciences [q-bio]/Ecology, environment, [SDV.BID]Life Sciences [q-bio]/Biodiversity
Published
2008

10. Phylogeographical structure and regional history of Lemniscomys striatus (Rodentia, Muridae) in tropical Africa

Author

Nicolas, V., Mboumba, J.F., Verheyen, E., Denys, C., Lecompte, E., Olayemi, A., Missoup, A.D., Kutuala, P., Colyn, M., Evolution et Diversité Biologique (EDB), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées

Published
2008

14. Description of the karyotype of Heimyscus fumosus and of several other murids from the Mount Doudou area (Gabon)

Author

Lecompte, E., violaine nicolas, Colyn, M., Denys, C., Volobouev, V., Origine, structure et évolution de la biodiversité (OSEB), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO), Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Université de Rennes (UR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), and Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE]
Published
2005

15. Revisiting the phylogeography and demography of European badgers (Meles meles) based on broad sampling, multiple markers and simulations

Author

Frantz, A C, primary, McDevitt, A D, additional, Pope, L C, additional, Kochan, J, additional, Davison, J, additional, Clements, C F, additional, Elmeros, M, additional, Molina-Vacas, G, additional, Ruiz-Gonzalez, A, additional, Balestrieri, A, additional, Van Den Berge, K, additional, Breyne, P, additional, Do Linh San, E, additional, Ågren, E O, additional, Suchentrunk, F, additional, Schley, L, additional, Kowalczyk, R, additional, Kostka, B I, additional, Ćirović, D, additional, Šprem, N, additional, Colyn, M, additional, Ghirardi, M, additional, Racheva, V, additional, Braun, C, additional, Oliveira, R, additional, Lanszki, J, additional, Stubbe, A, additional, Stubbe, M, additional, Stier, N, additional, and Burke, T, additional

Published
2014
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16. A craniometric and genetic approach to the systematics of the genus Dasymys PETERS, 1875 and the description of three new taxa (Rodentia, Muridae, Africa)

Author

Walter Verheyen, Jan Hulselmans, Dierckx, T., Colyn, M., Herwig Leirs, ERIK VERHEYEN, Department of Biology - Antwerp (UA), University of Antwerp (UA), Evolutionary Ecology Group, Universiteit Antwerpen, Universiteit Antwerpen = University of Antwerpen [Antwerpen], Ethologie, éVolution, Ecologie (EVE), Ethologie animale et humaine (EthoS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Danish Pest Infestation Laboratory, Faculty of Agricultural Sciences, Department of Integrated Pest Management, Aarhus University [Aarhus], Evolutionary Ecology Group, Department Vertebrates, Institut Royal des Sciences Naturelles de Belgique (IRSNB), State University Center of Antwerp, Universiteit Antwerpen, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), and Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
taxonomy, cytochrome b, [SDV]Life Sciences [q-bio], Africa, Dasymys, [SDE]Environmental Sciences, Rodentia, craniometry, phylogeny
Abstract

International audience; In an attempt to properly identify Dasymys specimens that were collected during the last decennia in the East-African region (Rwanda-Tanzania) we undertook a revision, of this genus. Although we initially limited our study area to central and eastern Africa, we were forced to include specimens for comparison from other areas, including western Africa, Angola and Zimbabwe-Zambia. This revision was realized using craniometric data of nearly 1000 skulls grouped in 20 operational taxonomical units (OTU's) mainly occurring in the central and eastern part of the African continent. The observation that differences in age and sex composition of the OTU's are of no or little consequence for the branching of the obtained phenetic trees, allowed us to undertake the screening of the genus Dasymys of the central and eastern African region. This approach enabled us to evaluate already described taxa, to select a neotype for D. nudipes and to describe three new taxa. Subsequent genetic analysis (cytochrome b) allowed us to provide a genetical characterization of two of the new species and several other taxa. Our phylogenetic analysis suggests that the genus Dasymys originated in the west African forest block betore spreading in a first step to the forest of the central African region and then in a second step to the savannahs of southern, eastern and possibly also western Africa.

Published
2003

17. Geographical distribution and morphometry of Heimyscus fumosus (Brosset et al., 1965)

Author

violaine nicolas, Wendelen, W., Verheyen, W., Colyn, M., Ethologie, éVolution, Ecologie (EVE), Ethologie animale et humaine (EthoS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Zoology Department (RMCA-TERVUEREN), Université de Tervuren, Royal Museum for Central Africa [Tervuren] (RMCA), Department of Biology - Antwerp (UA), State University Center of Antwerp, Normandie Université (NU)-Normandie Université (NU)-Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), and University of Antwerp (UA)

Subjects
Afrique Centrale, Morphométrie, Central Africa, Morphometry, [SDV]Life Sciences [q-bio], Skull, Hylomyscus fumosus, Forests, Répartition géographique, Variation morphologique, Zone intertropicale, Chemistry, Crâne, Morphological variation, Forêt, [SDE]Environmental Sciences, Intertropical zone, Geographic distribution, Biology, Ecology, Evolution, Behavior and Systematics
Abstract

More than 35 years after its original description, our knowledge of the De Balsac’s mouse (Heimyscus fumosus) remains poor, and few specimens are deposited in museums. We collected 239 specimens of this species in ten central African localities. We therefore had the opportunity to confirm its geographical distribution, which covers lowland forests between the Sanaga and the Oubangui-Congo rivers. Moreover, based upon specimens collected from a single locality, we analysed intra-populational morphological variations of the De Balsac’s mouse. We showed that most external and cranial measurements increased with age ; while sexual dimorphism was low., Plus de 35 ans après sa description, le Muridé africain Heimyscus fumosus reste mal connu et peu de spécimens sont déposés dans les musées. Depuis 1992 nous avons collecté 239 spécimens dans dix localités d’Afrique centrale, nous permettant de confirmer sa distribution géographique. Cette espèce est présente dans les forêts de plaine situées entre les rivières Sanaga et Oubangui-Congo. De plus, l’étude d’une population du sud-ouest du Gabon nous a permis d’analyser les variations morphologiques intra-populationnelles chez cette espèce. Nos résultats mettent en évidence une augmentation avec l’âge de la plupart des mesures externes et crâniennes ; en revanche, le dimorphisme sexuel est faible., Nicolas Violaine,Wendelen Wim,Verheyen Walter N.,Colyn Marc. Geographical distribution and morphometry of Heimyscus fumosus (Brosset et al., 1965). In: Revue d'Écologie (La Terre et La Vie), tome 58, n°2, 2003. pp. 197-208.

Published
2003

19. Population structure and genetic diversity of red deer (Cervus elaphus) in forest fragments in north-western France

Author

Université libre de Bruxelles - Evolutionary Biology and Ecology, University of Sheffield - NERC Biomolecular Analysis Facility-Sheffield, CNRS-UMR 6553 Université de Rennes - Station Biologique, Service publique de wallonie - Département de l'étude du milieu naturel et agricole, UCL - SST/ISV - Institut des sciences de la vie, Dellicour, Simon, Frantz, A.C., Colyn, M., Bertouille, Sabine, Chaumont, François, Flamand, Marie-Christine, Université libre de Bruxelles - Evolutionary Biology and Ecology, University of Sheffield - NERC Biomolecular Analysis Facility-Sheffield, CNRS-UMR 6553 Université de Rennes - Station Biologique, Service publique de wallonie - Département de l'étude du milieu naturel et agricole, UCL - SST/ISV - Institut des sciences de la vie, Dellicour, Simon, Frantz, A.C., Colyn, M., Bertouille, Sabine, Chaumont, François, and Flamand, Marie-Christine

Abstract

Red deer have been subjected to anthropogenic interference for many centuries. Most populations are managed according to hunting schedules, some have been kept long-term in enclosures and other populations have been restocked with foreign deer. The red deer in the Brittany region of north-western France only occupy the largest forests in the region, reaching quite high densities in restricted areas. Here, we aimed to assess the extent of the genetic variability of the populations in four forest fragments and investigate their population genetic structure. We show that, despite relatively large expected heterozygosity values, these geographically isolated populations are genetically impoverished relative to individuals from large continuous forests in other parts of Western Europe. We provide evidence for population genetic structure with large genetic differentiation between geographically close populations, suggesting the absence of effective exchange between the forests. Using samples from the most likely source population, we show that at least two populations were non-indigenous. In order to limit further loss of genetic diversity, it should be a management objective to reduce isolation of the different forests, rather than further increase it by fences and hunting practices that could limit free movement of red deer.

Published
2011

25. Plio‐Pleistocene history of West African Sudanian savanna and the phylogeography of the Praomys daltoni complex (Rodentia): the environment/geography/genetic interplay

Author

BRYJA, J., primary, GRANJON, L., additional, DOBIGNY, G., additional, PATZENHAUEROVÁ, H., additional, KONEČNÝ, A., additional, DUPLANTIER, J. M., additional, GAUTHIER, P., additional, COLYN, M., additional, DURNEZ, L., additional, LALIS, A., additional, and NICOLAS, V., additional

Published
2010
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27. A molecular diagnostic for identifying central African forest artiodactyls from faecal pellets

Author

Ntie, S., primary, Johnston, A. R., additional, Mickala, P., additional, Bowkett, A. E., additional, Jansen van Vuuren, B., additional, Colyn, M., additional, Telfer, P., additional, Maisels, F., additional, Hymas, O., additional, Rouyer, R. L., additional, Wallace, R. A., additional, LeBlanc, K., additional, van Vliet, N., additional, Sonet, G., additional, Verheyen, E., additional, Pires, D., additional, Wickings, E. J., additional, Lahm, S. A., additional, and Anthony, N. M., additional

Published
2010
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34. Une nouvelle puce du genre AllopsyllaBeaucournu et Fain, 1982 (Siphonaptera : Ischnopsyllidae) en République Centrafricaine, sur un chiroptère Molossidae méconnu

Author

Barrière, P., Beaucournu, J.C., Ménier, K., Colyn, M., Barrière, P., Beaucournu, J.C., Ménier, K., and Colyn, M.

Abstract

Un couple d'Allopsylla lobayensisBeaucournu et Barrière sp. n. a été récolté le 1er novembre 1999 en forêt de Ngotto, dans la partie sud-ouest du bassin de la Lobaye, République Centrafricaine (RCA). Le spécimen hôte, un chiroptère molossidé méconnu (Myopterus whitleyi), constitue la première collecte de l'espèce en RCA. La nouvelle puce s'apparente à A. heteraBeaucournu et Fain, 1982, l'une des deux autres espèces du genre Allopsyllaconnues jusqu'alors de régions fauniques distinctes (A. alloidesau Nigéria et A. heteraen République Démocratique du Congo). L'identification de trois hôtes parmi les trois espèces d'Allopsyllainterpelle sur la spécificité hôte-parasite au sein de ce groupe.

Published
2002
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37. Comparative phylogeography of two sibling species of forest-dwelling rodent ( Praomys rostratus and P. tullbergi) in West Africa: different reactions to past forest fragmentation.

Author

NICOLAS, V., BRYJA, J., AKPATOU, B., KONECNY, A., LECOMPTE, E., COLYN, M., LALIS, A., COULOUX, A., DENYS, C., and GRANJON, L.

Subjects
RODENTS, MAMMAL populations, CYTOCHROME b, FORESTS & forestry, PHYLOGEOGRAPHY, BIOGEOGRAPHY, CLIMATE change, RIVERS
Abstract

Two sibling species of the rodent genus Praomys occur in West African forests: P. tullbergi and P. rostratus. By sampling across their geographical ranges (459 individuals from 77 localities), we test the hypothesis that climatic oscillations during the Quaternary made an impact on the observed pattern of cytochrome b sequence variation. We show that, although these two species have parapatric geographical distributions, their phylogeographical histories are dissimilar, which could be related to their distinct ecological requirements. Since the arid phases of the Pleistocene were characterized by isolated forest patches, and intervening wetter periods by forest expansion, these changes in forest cover may be the common mechanism responsible for the observed phylogeographical patterns in both of these species. For example, in both species, most clades had either allopatric or parapatric geographical distributions; however, genetic diversity was much lower in P. tullbergi than in P. rostratus. The genetic pattern of P. tullbergi fits the refuge hypothesis, indicating that a very small number of populations survived in distinct forest blocks during the arid phases, then expanded again with forest recovery. In contrast, a number of populations of P. rostratus appear to have survived during the dry periods in more fragmented forest habitats, with varying levels of gene flow between these patches depending on climatic conditions and forest extent. In addition, historical variations of the West African hydrographic network could also have contributed to the pattern of genetic differentiation observed in both species. [ABSTRACT FROM AUTHOR]

Published
2008
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39. New status for two African giant forest shrews, Crocidura goliath goliathand C. goliath nimbasilvanus(Mammalia: Soricomorpha), based on molecular and geometic morphometric analyses

Author

Jacquet, F., Hutterer, R., Nicolas, V., Decher, J., Colyn, M., Couloux, A., and Denys, C.

Abstract

Crocidura goliath nimbasilvanusHutterer, 2003 (replacement name for C. odorata guineensisHeim de Balsac, 1968) from West Africa (Guinea, Liberia, Ivory Coast) and Crocidura goliath goliathThomas, 1906 from Central Africa (Cameroon, Central African Republic, Gabon, Republic of Congo, Democratic Republic of Congo) were regarded as members of a single species until recently. A phylogenetic analysis including three mitochondrial (16S, cytb and COI) and one nuclear marker (BRCA) shows that C. g. nimbasilvanusis the sister taxon of C. nimbae, a species also endemic to West Africa. Crocidura g. goliathis part of the C. olivierigroup and closely related to C. olivieri, C. viariaand C. fulvastra. Calculation of genetic distances between cytb sequences confirms this pattern (divergence of 13.5% between C. G. nimbasilvanusand C. G. goliath). An analysis of 112 skulls using morphometric geometrics provides evidence of marked shape differences between the two taxa. Despite close external morphological resemblances, we found diagnostic external and craniodental characters between these two forms. We therefore propose to treat C. nimbasilvanusand C. goliathas distinct species. Similar morphological features exhibited by these two African giant forest shrews, especially their large size, may be the result of homoplasy due to convergent evolutionary pressure. We also investigated the phenotypic diversification in size and skull shape within C. goliathand discovered strong intraspecific variability.

Published
2013
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42. Cercopithecus hamlyni kahuziensis(Primates, Cercopithecidae): une nouvelle sous-espèce de la forêt de bambous du Parc National ‘Kahuzi-Biega’ (Zaïre)

Author

Colyn, M. and Rahm, U.

Abstract

The owl-faced guenon, Cercopithecus hamlyni, inhabits an extensive rainforest region bounded by the River Zaire/Lualaba in the west, by the Lindi/Nepoko river complex in the north, by the Virunga volcano range in the east and by the rainforest limit in the south. The ecology of this primate species is as yet poorly documented. A new subspecies, C hamlyni kahuziensis, is described on the basis of three skins and one skull collected by U. Rahm and now stored in the collection of the Basel Natural History Museum. The usual T-pattern of white hairs on the nose and brows found in C. hamlyni hamlyni is replaced by black hairs in the new subspecies. Further, the dorsal parts of the body, including the back, flanks and proximal half of the tail, are uniformly dark olive green in colour. The distinctive silver gray hairs found on the thighs, perianal region and tail-base of C. hamlyni hamlyni are lacking. The belly, the limbs and the distal half of the tail are black. Dimensions of the skin and skull are provided for the holotype (subadult male specimen), along with photographs of the skull and of a live juvenile animal. Study of museum specimens indicates that features of C. hamlyni hamlyni are relatively consistent within the subspecies and are sharply distinct from those of C. hamlyni kahuziensis.

Published
1987
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43. Relative efficiency of three types of small mammal traps in an African rainforest

Author

violaine nicolas, Colyn, M., Origine, structure et évolution de la biodiversité (OSEB), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO), Université de Rennes (UR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Briand, Valerie, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut Ecologie et Environnement (INEE), and Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], [SDV.BID.EVO] Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], [SDV.BID]Life Sciences [q-bio]/Biodiversity

44. Population structure and reproduction of Heimyscus fumosus (Brosset et al., 1965) in south-western Gabon

Author

violaine nicolas, Wendelen, W., Verheyen, W., Colyn, M., Ethologie, éVolution, Ecologie (EVE), Ethologie animale et humaine (EthoS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Zoology Department (RMCA-TERVUEREN), Université de Tervuren, Royal Museum for Central Africa [Tervuren] (RMCA), Department of Biology - Antwerp (UA), University of Antwerp (UA), Normandie Université (NU)-Normandie Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), and State University Center of Antwerp

Subjects
Statut reproducteur, Seasonal variation, Reproduction, [SDV]Life Sciences [q-bio], Hylomyscus fumosus, Cycle reproducteur, Mating status, Population structure, Chemistry, Reproductive cycle, Zone intertropicale, Variation saisonnière, Age, [SDE]Environmental Sciences, Gabon, Heimyscus fumosus, Intertropical zone, Biology, Structure population
Abstract

International audience; Population structure and annual reproduction cycle of the De B alsac's mouse (Heimyscus fumosus) were studied in a wild population of south-western Gabon. The reproductive status of the mice was investigated at autopsy, and age of each animal was estimated by tooth wear patterns and body weight. Sex-ratio was equilibrated whatever the season and the ageclass. Females tended to reach sexual maturity more slowly than males. However, the average age at puberty differed between individuals of the same sex. A wide range of tooth-wearclasses and weight-classes were present in most months of the year, and sexually active individuals of both sexes were captured in most months. However pregnant or lactating females were only captured from August to March, while very young individuals were only captured from October to March. Thus, the reproduction of H. fumosus would be partly seasonal with an interruption from April to July (end of the short wet season, and beginning of the long dry season). We discussed the potential role of food availability on this seasonality; La reproduction et la structure de population du Muridé africain Heimyscus fumosus ont été étudiées dans une population sauvage du sud-ouest du Gabon. Pour chaque animal, nous avons noté, lors de l'autopsie, s'il était sexuellement actif et, pour les femelles, si elles étaient prégnantes ou allaitantes. De plus, l'âge des animaux a été estimé en fonction de leur usure dentaire et de leur poids. Le sexe-ratio obtenu était équilibré quels que soient l'âge ou la saison. Bien que l'âge de la puberté diffère entre individus de même sexe, les femelles atteindraient leur maturité sexuelle plus tardivement que les mâles. La plupart des mois, de larges gammes de classes de poids et de classes d'âge dentaires étaient présentes. Bien que des individus sexuellement actifs aient été capturés tout au long de l'année, les femelles allaitantes et prégnantes ne l'ont été que d'août à mars, tandis que les très jeunes individus l'ont été d'octobre à mars. Ainsi, la reproduction de H. fumosus serait partiellement saisonnière, avec une interruption d'avril à juillet (fin de la petite saison des pluies et début de la grande saison sèche). Nous discutons du rôle potentiel de la disponibilité des ressources sur cette saisonnalité de la reproduction.

48. Molecular analysis of vector-borne pathogens in Eurasian badgers (Meles meles) from continental Europe.

Author

Lindhorst ZTL, Brandstetter S, Unterköfler MS, Eigner B, Spergser J, Colyn M, Steinbach P, Ćirović D, Šprem N, Dumić T, Veneziano V, Müller F, Harl J, Deak G, Ionică AM, Heddergott M, and Fuehrer HP

Subjects
Animals, Europe epidemiology, Mycoplasma genetics, Mycoplasma isolation & purification, Mycoplasma classification, Filarioidea genetics, Filarioidea isolation & purification, Filarioidea classification, Disease Vectors, Piroplasmida genetics, Piroplasmida isolation & purification, Piroplasmida classification, Animals, Wild parasitology, Animals, Wild microbiology, Female, Vector Borne Diseases epidemiology, Vector Borne Diseases transmission, Vector Borne Diseases parasitology, Vector Borne Diseases microbiology, Male, Phylogeny, Prevalence, Trypanosoma genetics, Trypanosoma isolation & purification, Trypanosoma classification, Mustelidae parasitology, Mustelidae microbiology, Anaplasmataceae isolation & purification, Anaplasmataceae genetics, Bartonella genetics, Bartonella isolation & purification, Bartonella classification, Rickettsia isolation & purification, Rickettsia genetics, Rickettsia classification
Abstract

Background: Vector-borne pathogens (VBPs) are increasing in significance in veterinary medicine and public health settings, with wildlife playing a potentially crucial role in their transmission. Eurasian badgers (Meles meles) are widely distributed across Europe. However, information currently available on the prevalence of VBPs in badgers is limited. The objective of the current study was to investigate the occurrence of Anaplasmataceae, Bartonella spp., Mycoplasma spp., Rickettsia spp., Piroplasmida, Trypanosomatida and Filarioidea in badgers and subsequently, based on the results, assess the potential risk to domestic animals, other wildlife and humans., Methods: Between 2017 and 2021, blood or spleen samples from 220 badgers were collected in nine continental European countries: Austria (n = 7), Bosnia and Herzegovina (n = 2), Croatia (n = 22), France (n = 44), Germany (n = 16), Hungary (n = 7), Italy (n = 16), Romania (n = 80) and Serbia (n = 26). VBPs were identified by performing PCR analysis on the samples, followed by Sanger sequencing. Additionally, to distinguish between different Babesia lineages we performed restriction fragment length polymorphism (RFLP) analysis on piroplasm-positive samples, using HinfI as restriction enzyme. A phylogenetic analysis was performed on Mycoplasma spp., Results: The pathogens identified were Babesia sp. badger type A (54%), B (23%), and C (37%); Trypanosoma pestanai (56%); Mycoplasma sp. (34%); Candidatus Mycoplasma haematomelis (8%); Candidatus Mycoplasma haematominutum (0.5%); and Ehrlichia spp. (2%). Rickettsia spp., Bartonella spp. and filarioid nematodes were not detected among the tested samples., Conclusions: The large sample size and diverse study populations in this study provide valuable insights into the distribution and epidemiology of the analyzed pathogens. Some of the VBPs identified in our study show high similarity to those found in domestic animals, such as dogs. This finding suggests that badgers, as potential reservoirs for these pathogens, may pose a threat not only to other wildlife but also to domestic animals in close vicinity. Continuous surveillance is essential to monitor VBPs in wildlife as a means to enable the assessment of their impact on other wildlife species, domestic animals and human health., (© 2024. The Author(s).)

Published
2024
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49. Incongruences between morphology and molecular phylogeny provide an insight into the diversification of the Crocidura poensis species complex.

Author

Voet I, Denys C, Colyn M, Lalis A, Konečný A, Delapré A, Nicolas V, and Cornette R

Subjects
Animals, Climate, Humans, Phylogeny, Skull anatomy & histology, Ecosystem, Shrews
Abstract

Untangling the factors of morphological evolution has long held a central role in the study of evolutionary biology. Extant speciose clades that have only recently diverged are ideal study subjects, as they allow the examination of rapid morphological variation in a phylogenetic context, providing insights into a clade's evolution. Here, we focus on skull morphological variability in a widely distributed shrew species complex, the Crocidura poensis species complex. The relative effects of taxonomy, size, geography, climate and habitat on skull form were tested, as well as the presence of a phylogenetic signal. Taxonomy was the best predictor of skull size and shape, but surprisingly both size and shape exhibited no significant phylogenetic signal. This paper describes one of the few cases within a mammal clade where morphological evolution does not match the phylogeny. The second strongest predictor for shape variation was size, emphasizing that allometry can represent an easily accessed source of morphological variability within complexes of cryptic species. Taking into account species relatedness, habitat preferences, geographical distribution and differences in skull form, our results lean in favor of a parapatric speciation model within this complex of species, where divergence occurred along an ecological gradient, rather than a geographic barrier., (© 2022. The Author(s).)

Published
2022
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50. The phylogeny of the African wood mice (Muridae, Hylomyscus) based on complete mitochondrial genomes and five nuclear genes reveals their evolutionary history and undescribed diversity.

Author

Nicolas V, Fabre PH, Bryja J, Denys C, Verheyen E, Missoup AD, Olayemi A, Katuala P, Dudu A, Colyn M, Kerbis Peterhans J, and Demos T

Subjects
Africa, Animals, Cell Nucleus genetics, DNA, Mitochondrial genetics, Ecosystem, Forests, Mice, Phylogeny, Sequence Analysis, DNA, Tropical Climate, Biological Evolution, Genetic Variation, Genome, Mitochondrial, Murinae classification, Murinae genetics
Abstract

Wood mice of the genus Hylomyscus, are small-sized rodents widely distributed in lowland and montane rainforests in tropical Africa, where they can be locally abundant. Recent morphological and molecular studies have increased the number of recognized species from 8 to 18 during the last 15 years. We used complete mitochondrial genomes and five nuclear genes to infer the number of candidate species within this genus and depict its evolutionary history. In terms of gene sampling and geographical and taxonomic coverage, this is the most comprehensive review of the genus Hylomyscus to date. The six species groups (aeta, alleni, anselli, baeri, denniae and parvus) defined on morphological grounds are monophyletic. Species delimitation analyses highlight undescribed diversity within this genus: perhaps up to 10 taxa need description or elevation from synonymy, pending review of type specimens. Our divergence dating and biogeographical analyses show that diversification of the genus occurred after the end of the Miocene and is closely linked to the history of the African forest. The formation of the Rift Valley combined with the declining global temperatures during the Late Miocene caused the fragmentation of the forests and explains the first split between the denniae group and remaining lineages. Subsequently, periods of increased climatic instability during Plio-Pleistocene probably resulted in elevated diversification in both lowland and montane forest taxa., (Copyright © 2019 Elsevier Inc. All rights reserved.)

Published
2020
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