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Usage des rodenticides anticoagulants et conséquences en termes d'exposition et d'impact pour les populations de renard roux

Abstract : Rodents are mainly controlled with anticoagulant rodenticides (AR). AR exposure and impact were studied for red fox populations. In France, we distinguish 2 contexts of AR use: "biocide" (BCD) where AR are used next to buildings and "phytopharmaceutical" (PP) where bromadiolone (an AR) is also applied in the field against the water vole. Rodent contamination to AR was characterized: 5 different AR were detected in rodents in the BCD context while bromadiolone was predominantly found in the PP context; non target rodents being exposed in both contexts. AR contamination was the highest for target species or species with similar lifestyle. Red fox exposure was assessed through the measurement of AR residues in faeces sampled in the field. ARs were detected more frequently where PP treatments occurred. Every positive faeces contained only bromadiolone except one (BCD context) with chlorophacinone. In PP context, the ratio of positive faeces varied non-linearly with the area of PP treatments within a 1km-radius around faeces. The impact of bromadiolone PP treatments on red fox populations was assessed (period 2003-2009, Doubs department). Kilometric Abundance Index of foxes measured a year n decreased with higher treatment intensities the years n-1 and n-2. Moreover we have shown that a shift to preventive treatments with reduced AR use is less harmful to fox populations.
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https://tel.archives-ouvertes.fr/tel-00917412
Contributor : Marion Jacquot <>
Submitted on : Wednesday, December 11, 2013 - 6:21:49 PM
Last modification on : Wednesday, December 2, 2020 - 9:56:06 AM
Long-term archiving on: : Wednesday, March 12, 2014 - 8:45:13 AM

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  • HAL Id : tel-00917412, version 1

Citation

Marion Jacquot. Usage des rodenticides anticoagulants et conséquences en termes d'exposition et d'impact pour les populations de renard roux. Biodiversité et Ecologie. Université de Franche-Comté, 2013. Français. ⟨tel-00917412⟩

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