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Toxicity and bioaccumulation of bromadiolone to earthworm Eisenia fetida

Authors :
Li Ji
Jing Liu
Ye Yang
Jianyun Zhang
Xiaoqing Ye
Kang Xiong
Source :
Chemosphere. 135
Publication Year :
2014

Abstract

Bromadiolone, a potent second-generation anticoagulant rodenticide, has been extensively used worldwide for the field control of rodents. Invertebrates may be at risk from primary poisoning as a result of bromadiolone bait applications. However, there are few data regarding the toxicity and bioaccumulation of bromadiolone to earthworms. In this study, we reported that bromadiolone was toxic to earthworms at 1mg/kg soil, which is a likely concentration in the field following application of bromadiolone baits. Exposure to bromadiolone resulted in a significant inhibition of earthworm growth. The antioxidant activities of superoxide dismutase and catalase were slightly increased in earthworms, while malondialdehyde content (as a molecular marker indicative of the damage to lipid peroxidation) was dominantly elevated over the duration of exposure. Bromadiolone in soil is bioaccumulative to earthworms. The biota to soil accumulation factors (BSAFs) of bromadiolone were concentration dependent and BSAFs decreased as the level of bromadiolone in soil increased. These results suggest earthworms are not only the potential subject to primary poisoning but also the source of secondary exposure for insectivores and scavengers following application of bromadiolone.

Details

ISSN :
18791298
Volume :
135
Database :
OpenAIRE
Journal :
Chemosphere
Accession number :
edsair.doi.dedup.....aaa56f8dad23abd55c5afc4787f5eb51