Biological Invasions

, Volume 15, Issue 9, pp 2001–2012 | Cite as

Multi-event models reveal the absence of interaction between an invasive frog and a native endangered amphibian

  • Hugo CayuelaEmail author
  • Aurélien Besnard
  • Pierre Joly
Original Paper


Among the multiple factors involved in the decline of amphibians, competition with alien species remains understudied. In Western Europe, non-native marsh frogs (Pelophylax ridibundus and other sister species) have been widely imported for gastronomic purposes and have then often escaped from captivity. Apart from closely related species, the impact of the subsequent colonization of non-native species on native amphibians is still unknown. In this study, we analysed the response of a threatened species, the yellow-bellied toad (Bombina variegata), faced with the presence of alien frogs in mountain rivers in France. We studied the co-occurrence pattern of the native toad and the alien frog, while taking into account co-dependence of the detection rates in both species. We tested three main scenarios to explain a non-random pond occurrence for each species and to establish their respective habitat preferenda: (1) a pond-area-dependent scenario, predicting different responses from each species for a given pond size, (2) a fish-dependent scenario, predicting different responses from each species given the presence of fish in ponds, and (3) a floodplain-width-dependent scenario, predicting different responses from each species given the geomorphological characteristics of the floodplain. Taking into account site-specific covariates, we concluded that introduced frogs do not currently have an impact on the native population of the yellow-bellied toad.


Overlap in habitat use Bombina variegata Pelophylax ridibundus Multi-event models Detection 



We would like to thank the volunteer fieldworkers who helped in data collection, especially Sylvain Boitaud, Clément Chérie and Adeline Audibert. We also thank Jean-Paul Thomas and Eric Gaillard, who provided their field knowledge, and Sylvain Maillard and Jules Chiffard, who created the map provided in this paper. This research was funded by the Conseil Général du Département de l’Ardèche, Rhône-Alpes DREAL and the Parc Naturel Régional des Monts d’Ardèche (Nicolas Dupieux). We are also grateful for the technical support that the Municipality of Gluiras has lent to the achievement of this study. Capture was authorised by the Préfecture de l’Ardèche (Arrêté no2010-98-5 was formally given on 8 April 2010) for the purpose of population monitoring. We warmly thank the two anonymous referees who have contributed to significantly improving the manuscript.

Supplementary material

10530_2013_427_MOESM1_ESM.docx (23 kb)
Supplementary material 1 (DOCX 22 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), U.M.R. 5175MontpellierFrance
  2. 2.Laboratoire d’Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), U.M.R. 5023VilleurbanneFrance

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