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Laurane Winandy and Mathieu Denoël. Behavioral Ecology first published online July 10, 2015. We experimentally assessed the impact of goldfish on the foraging behavior of both phenotypes of palmate newts (Lissotriton helveticus). More particularly, we assessed fish personality by analyzing the foraging activity and the aggressiveness toward newts, and newt personality by analyzing individual difference in boldness. In the presence of fish, fewer newts foraged than in their absence, and paedomorphs were more affected than metamorphs. We found strong personality differences in fish and fewer newts foraged in the presence of a more aggressive fish. Newts differed in boldness, but fish aggressiveness remains a key factor to explain newt behavior. Leer más.

Alexandra Hoffmann, Jörg Plötner, Nicolas B. M. Pruvost, Ditte G. Christiansen, Sandra Röthlisberger, Lukáš Choleva, Peter Mikulíček, Dan Cogălniceanu, István Sas-Kovács, Dmitry Shabanov, Svyatoslav Morozov-Leonov and Heinz-Ulrich Reyer. Molecular Ecology. Volume 24, Issue 17. We found that different hybrid and parental genotypes are not evenly distributed across Europe. Rather, their genetic diversity is structured by latitude and longitude and the presence/absence of parental species but not of triploids. Highest genetic diversity was observed in central and eastern Europe, the lowest in the northwestern parts of Europe. Leer más.