Article (Scientific journals)
Comparison of diet and prey selectivity of the Pyrenean desman and the Eurasian water shrew using next-generation sequencing methods
Biffi, M.; Laffaille, P.; Jabiol, J. et al.
2017In Mammalian Biology, 87, p. 176-184
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Keywords :
COI; Dietary overlap; Foraging strategy; Scat analyses; Semi-aquatic mammal; Galemys pyrenaicus; Invertebrata; Mammalia; Neomys fodiens
Abstract :
[en] In this study, the interactions between two semi-aquatic mammals, the endangered Pyrenean desman Galemys pyrenaicus and the Eurasian water shrew Neomys fodiens, were investigated through the analysis of their summer diet using next-generation sequencing methods, combined with analyses of prey selectivity and trophic overlap. The diet of these predators was highly diverse including 194 and 205 genera for G. pyrenaicus and N. fodiens respectively. Overall, both species exhibited rather non-selective foraging strategies as the most frequently consumed invertebrates were also the most frequent and abundant in the streams. This supported a generalist foraging behaviour for G. pyrenaicus and N. fodiens in the study area. The Pianka index (0.4) indicated a significant but moderate dietary overlap as G. pyrenaicus mostly relied on prey with aquatic stages whereas prey of N. fodiens were mainly terrestrial. Moreover, no difference in G. pyrenaicus prey consumption was found in presence or absence of N. fodiens. A differential use of trophic resources through mechanisms such as plastic feeding behaviour or differences in foraging micro-habitat are likely to facilitate the coexistence between these two mammal species. © 2017 Deutsche Gesellschaft für Säugetierkunde
Disciplines :
Zoology
Author, co-author :
Biffi, M.;  EcoLab, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, Toulouse cedex 9, France
Laffaille, P.;  EcoLab, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, Toulouse cedex 9, France
Jabiol, J.;  EcoLab, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, Toulouse cedex 9, France
André, Adrien ;  Université de Liège - ULiège > Département des sciences de la vie > Génétique et physiologie des microalgues
Gillet, François ;  Université de Liège - ULiège > Département des sciences de la vie > Génétique et physiologie des microalgues
Lamothe, S.;  EcoLab, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, Toulouse cedex 9, France
Michaux, Johan  ;  Université de Liège - ULiège > Département des sciences de la vie > Génétique et physiologie des microalgues
Buisson, L.;  EcoLab, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, Toulouse cedex 9, France
Language :
English
Title :
Comparison of diet and prey selectivity of the Pyrenean desman and the Eurasian water shrew using next-generation sequencing methods
Publication date :
2017
Journal title :
Mammalian Biology
ISSN :
1616-5047
Publisher :
Elsevier GmbH
Volume :
87
Pages :
176-184
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 February 2018

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