Secondary poisoning in the common shrew <i>(Sorex araneus)</i> fed earthworms exposed to an organophosphate pesticide
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- Giacomo Dell'Omo
- Institute of Anatomy, University of Zurich-Irchel, CH-8057 Zurich, Switzerland
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- Anthony Turk
- Institute of Terrestrial Ecology, Monks Wood, Abbots Ripton, Huntingdon, Cambridgeshire, PE17 2LS, United Kingdom
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- Richard F Shore
- Institute of Terrestrial Ecology, Monks Wood, Abbots Ripton, Huntingdon, Cambridgeshire, PE17 2LS, United Kingdom
説明
<jats:title>Abstract</jats:title> <jats:p>Earthworms Esinia spp. were kept for a 48-h period in artificial soil contaminated with a sublethal dose of dimethoate, an organophosphate pesticide. Different groups of common shrews, Sorex araneus, were fed earthworms that had been exposed to contaminated soil either 1, 5, or 10 d previously. Cholinesterase (ChE) activity was measured in worms and in the shrews before and after they were fed contaminated worms. After exposure to dimethoate-treated soil, ChE activity in worms was inhibited by 90%. Recovery was slow, and ChE activity was still markedly inhibited (35% of the control level) 40 d after exposure. Whole blood ChE activity in shrews was significantly depressed (64% of preexposure levels) when animals were fed worms that had been exposed to dimethoate-treated soil on the previous day. There was no such significant inhibition in shrews fed worms that had been exposed to contaminated soil either 5 or 10 d previously.</jats:p>
収録刊行物
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- Environmental Toxicology and Chemistry
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Environmental Toxicology and Chemistry 18 (2), 237-240, 1999-02-01
Oxford University Press (OUP)
