Document Detail


Effect of malathion on survival, growth, and food consumption of Indian cricket frog (Limnonectus limnocharis) tadpoles.
MedLine Citation:
PMID:  17160490     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of short-term exposure (28 days) of free-feeding Limnonectus limnocharis (Indian cricket frog) tadpoles to field concentrations of malathion were investigated. This frog species is a major biotic component of the agroecosystems of the Western Ghats (13 degrees 18', 75 degrees 25' and 13 degrees 22', 75 degrees 28'), where malathion (diethyl [(dimethoxy phosphino thioyl] butanediote), an organophosphate pesticide, is being used extensively. Although malathion is known to cause nonreversible acetylcholine inhibition and diminishes activity, growth and development in amphibian tadpoles, such data on Indian amphibian species are lacking. In the present study, increments in the following were used to assess such an impact: tadpole growth; increase in total length, body length, tail length, and body weight; and food consumption. The different concentrations of malathion employed were 500, 1000, 1500, 2000, and 3000 mug L(-1). Malathion exposure produced significant effects on all measured parameters. Tadpole survival decreased from 20 to 6 tadpoles, with an increase in concentration followed by a decrease in growth. Food consumption of surviving tadpoles also decreased (0.067 mg.g(-1).d(-1) to 0.0075 mg.g(-1).d(-1)) with increased malathion. Decreased food consumption, growth, and development of L. limnocharis tadpoles with an increase of malathion concentration (within field concentration range) over temporal scale reveal the possible threat to this species in the agroecosystems of the Western Ghats.
Authors:
H P Gurushankara; S V Krishnamurthy; V Vasudev
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-12-07
Journal Detail:
Title:  Archives of environmental contamination and toxicology     Volume:  52     ISSN:  0090-4341     ISO Abbreviation:  Arch. Environ. Contam. Toxicol.     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2006-12-20     Completed Date:  2007-02-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0357245     Medline TA:  Arch Environ Contam Toxicol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  251-6     Citation Subset:  IM    
Affiliation:
Department of P.G. Studies and Research in Applied Zoology, Kuvempu University, Shankaraghatta-577451, Shimoga, Karnataka, India.
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Animals
Body Weights and Measures
Environmental Pollutants / toxicity*
Feeding Behavior / drug effects*
India
Larva / drug effects,  growth & development
Malathion / toxicity*
Ranidae / growth & development*
Survival Analysis
Toxicity Tests
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 121-75-5/Malathion

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


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