Article (Scientific journals)
The aggressive personality of an introduced fish affects foraging behavior in a polymorphic newt
Winandy, Laurane; Denoël, Mathieu
2015In Behavioral Ecology, 26 (6), p. 1528-1536
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Keywords :
behavioral type; behavioral syndrome; personnality; temperament; foraging behavior; feeding behavior; interactions; invasive species; introduced species; introduced fish; amphibian decline; polymorphism; facultative paedomorphosis; heterochrony; Larzac; palmate newt; Lissotriton helveticus; Carassius auratus; goldfish
Abstract :
[en] The study of personality has aroused much interest and has provided insight into the understanding of animal behavior. Nevertheless, the study of the ecological consequences of personality is a newer field that could shed light on cases of alien species introductions. The goldfish (Carassius auratus) is frequently introduced worldwide and affects the abundance of newts, having an especially negative impact on an alternative phenotype, the paedomorph, which maintains larval traits at the adult stage, unlike the other phenotype, the metamorph, which has undergone metamorphosis. 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. Studying behavioral interactions between native and alien species helps to understand the mechanisms of coexistence and exclusion and why different phenotypes might be affected differently by the same threat. To a great extent, not only the presence of fish alters the foraging opportunities of newts but also the personality of the invader; integrating personality patterns of invaders is therefore a key to understanding the ecological consequences of alien species introduction.
Research Center/Unit :
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
Disciplines :
Animal psychology, ethology & psychobiology
Environmental sciences & ecology
Aquatic sciences & oceanology
Author, co-author :
Winandy, Laurane ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Denoël, Mathieu  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Language :
English
Title :
The aggressive personality of an introduced fish affects foraging behavior in a polymorphic newt
Publication date :
November 2015
Journal title :
Behavioral Ecology
ISSN :
1045-2249
eISSN :
1465-7279
Publisher :
Oxford University Press - Journals Department, Oxford, United Kingdom
Volume :
26
Issue :
6
Pages :
1528-1536
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique
ULg FSR - Université de Liège. Fonds spéciaux pour la recherche
Available on ORBi :
since 26 June 2015

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