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"Freshwater killer whales": beaching behavior of an alien fish to hunt land birds

Cucherousset, Julien and Boulêtreau, Stéphanie and Azémar, Frédéric and Compin, Arthur and Guillaume, Mathieu and Santoul, Frédéric "Freshwater killer whales": beaching behavior of an alien fish to hunt land birds. (2012) PLoS ONE, vol. 7 (n° 12). pp. 1-6. ISSN 1932-6203

(Document in English)

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Official URL: http://dx.doi.org/10.1371/journal.pone.0050840


The behavioral strategies developed by predators to capture and kill their prey are fascinating, notably for predators that forage for prey at, or beyond, the boundaries of their ecosystem. We report here the occurrence of a beaching behavior used by an alien and large-bodied freshwater predatory fish (Silurus glanis) to capture birds on land (i.e. pigeons, Columbia livia). Among a total of 45 beaching behaviors observed and filmed, 28% were successful in bird capture. Stable isotope analyses (δ¹³C and δ¹⁵N) of predators and their putative prey revealed a highly variable dietary contribution of land birds among individuals. Since this extreme behavior has not been reported in the native range of the species, our results suggest that some individuals in introduced predator populations may adapt their behavior to forage on novel prey in new environments, leading to behavioral and trophic specialization to actively cross the water-land interface.

Item Type:Article
Additional Information:Thanks to Public Library of Science editor. The definitive version is available at http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0050840
HAL Id:hal-00912704
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole Nationale Supérieure de Formation de l'Enseignement Agricole - ENSFEA (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Deposited By: Frédéric Santoul
Deposited On:02 Dec 2013 14:21

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