Document Detail

Predator-induced stress makes the pesticide carbaryl more deadly to gray treefrog tadpoles (Hyla versicolor).
MedLine Citation:
PMID:  11226266     Owner:  NLM     Status:  MEDLINE    
Global declines in amphibians likely have multiple causes, including widespread pesticide use. Our knowledge of pesticide effects on amphibians is largely limited to short-term (4-d) toxicity tests conducted under highly artificial conditions to determine lethal concentrations (LC50). We found that if we used slightly longer exposure times (10-16 d), low concentrations of the pesticide carbaryl (3-4% of LC50(4-d)) killed 10-60% of gray treefrog (Hyla versicolor) tadpoles. If predatory cues also were present, the pesticide became 2-4 times more lethal, killing 60-98% of tadpoles. Thus, under more realistic conditions of increased exposure times and predatory stress, current application rates for carbaryl can potentially devastate gray treefrog populations. Further, because predator-induced stress is ubiquitous in animals and carbaryl's mode of action is common to many pesticides, these negative impacts may be widespread in nature.
R A Relyea; N Mills
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Publication Detail:
Type:  Journal Article     Date:  2001-02-13
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  98     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-03-06     Completed Date:  2001-09-13     Revised Date:  2013-04-17    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2491-6     Citation Subset:  IM    
Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.
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MeSH Terms
Anura / growth & development*
Carbaryl / toxicity*
Insecticides / toxicity*
Larva / drug effects*
Pilot Projects
Predatory Behavior*
Reg. No./Substance:
0/Insecticides; 63-25-2/Carbaryl

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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