Document Detail

Effects of agricultural runoff on native amphibians in the Lower Fraser River Valley, British Columbia, Canada.
MedLine Citation:
PMID:  11833805     Owner:  NLM     Status:  MEDLINE    
Hatching success, deformity rates, and survivorship of northern red-legged frogs (Rana aurora) and northwestern salamanders (Ambystoma gracile) were assessed at three agricultural and three reference sites in the Sumas Prairie, British Columbia, Canada. In 1997 and 1998, eggs of both species and eggs of R. aurora, respectively, were placed in Nytex mesh cages (Irwindale, CA, USA) in roadside ditches at each site. Concurrently in 1997, eggs of R. aurora were reared in the laboratory but were exposed to water samples from each of the study sites. Hatching success was significantly lower at all agricultural sites compared to the reference sites for both species. However, no differences were observed in hatching success among sites for eggs of R. aurora reared in the laboratory. Water chemistry differed among all sites, but the largest differences were between reference and agricultural sites. Ammonia (maximum of 1.27 mg/L), total phosphate (maximum of 8.14 mg/L), and biological oxygen demand (maximum of 79.00 mg/L) were high at some of the agricultural sites during the development period. Results suggest that agricultural runoff may contribute to lower reproductive success and ultimately to reduced population viability of amphibian populations in the Lower Fraser Valley (BC, Canada).
SollaShaneR de; Karen E Pettit; Christine A Bishop; Kimberly M Cheng; John E Elliott
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  21     ISSN:  0730-7268     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2002 Feb 
Date Detail:
Created Date:  2002-02-08     Completed Date:  2002-02-20     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  353-60     Citation Subset:  IM    
Agroecology Group, Faculty of Agricultural Sciences, University of British Columbia, Vancouver, Canada.
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MeSH Terms
Congenital Abnormalities / etiology,  veterinary
Larva / drug effects,  growth & development
Pesticides / adverse effects*
Population Dynamics
Soil Pollutants / adverse effects*
Water / chemistry
Water Movements*
Water Pollutants / adverse effects*
Reg. No./Substance:
0/Pesticides; 0/Soil Pollutants; 0/Water Pollutants; 7732-18-5/Water; 7782-44-7/Oxygen

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

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