Article (Scientific journals)
Cumulative effects of road de-icing salt on amphibian behavior
Denoël, Mathieu; Bichot, Marion; Ficetola, G. Francesco et al.
2010In Aquatic Toxicology, 99 (2), p. 275-280
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Keywords :
Ecotoxicology; NaCl; Sodium Chloride; Toxicity; Behaviour; Behavior; Locomotion; Video-tracking; Ethovision; Conservation; Rana temporaria; Common frog; Amphibian; Salt; Road de-icer; Road deicer; de-icing agent; Growth; Survival; Speed; Activity; Noldus; Behavioural marker; Behavioral marker
Abstract :
[en] Despite growing evidence of the detrimental effect of chemical substances on organisms, limited research has focused on changes in behavioral patterns, in part due to the difficulties to obtain detailed quantitative data. Recent developments in efficient computer-based video analyses have allowed testing pesticide effects on model species such as the zebrafish. However, these new techniques have not yet been applied to amphibians and directly to conservation issues, i.e. to assess toxicological risks on threatened species. We used video tracking analyses to test a quantitative effect of an environmental contaminant on the locomotion of amphibian tadpoles (Rana temporaria) by taking into account cumulative effects. Because recent research has demonstrated effects of de-icing salts on survival and community structure, we used sodium chloride in our experimental design (25 replicates, 4 concentrations, 4 times) to test for an effect at the scale of behavior at environmentally relevant concentrations. Analysis of 372 1-hr video-tracks (5 samples per sec) showed a complex action of salts on behavioral patterns with a dose and cumulative response over time. Although no effects were found on mortality or growth, the highest salt concentrations reduced the speed and movement of tadpoles in comparison with control treatments. The reduced locomotor performance could have detrimental consequences in terms of tadpoles’ responses to competition and predation and may be an indicator of the low concentration effect of the contaminant. On one hand, this study demonstrates the usefulness of examining behavior to address conservation issues and understand the complex action of environmental factors and, more particularly, pollutants on organisms. On the other hand, our results highlight the need of new computerized techniques to quantitatively analyze these patterns.
Disciplines :
Aquatic sciences & oceanology
Animal psychology, ethology & psychobiology
Environmental sciences & ecology
Author, co-author :
Denoël, Mathieu  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Bichot, Marion;  Université de Liège - ULiège > Département des Sciences et Gestion de l'Environnement > Unité de Biologie du Comportement
Ficetola, G. Francesco;  University of Milano-Biccoca, Italy
Delcourt, Johann  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Ylieff, Marc ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Kestemont, Patrick;  Facultés Universitaires Notre-Dame de la Paix - Namur - FUNDP
Poncin, Pascal ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Language :
English
Title :
Cumulative effects of road de-icing salt on amphibian behavior
Publication date :
2010
Journal title :
Aquatic Toxicology
ISSN :
0166-445X
eISSN :
1879-1514
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
99
Issue :
2
Pages :
275-280
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
FRFC - Fonds de la Recherche Fondamentale Collective [BE]
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