Document Detail


Impact of organochlorine pesticide residues and PCBs on otters (Lutra lutra): a study from western Britain.
MedLine Citation:
PMID:  8259486     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A study of otter (Lutra lutra) populations and levels of organochlorine (OC) pesticide residues and PCBs in otter droppings (spraints) was made on eight stretches of river in three catchments in Wales and West Midland England. Population and contaminant levels were compared against target values. The otter populations (as measured by an index) remained stable on one stretch over 11 years, while they increased rapidly to equilibrium on four other stretches. The three lower stretches of rivers showed more erratic trends and on only one stretch did the index exceed, occasionally, the target value. Marking intensity at spraint sites was also lower at the three lowland sites. Concentrations of dieldrin, DDE and PCBs were significantly greater in spraint samples from the three lowland stretches. Over 50% of samples from the three lowland stretches had OC concentrations above the maximum allowable concentration, whereas most samples from the upland stretches had concentrations below the 'no effects level'. It is suggested that the colonization, by otters, of their former lowland range is inhibited by OC contamination of their food chain but, if contaminant levels can be reduced, spread will occur rapidly.
Authors:
C F Mason; S M Macdonald
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Science of the total environment     Volume:  138     ISSN:  0048-9697     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  1993 Sep 
Date Detail:
Created Date:  1994-01-14     Completed Date:  1994-01-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  127-45     Citation Subset:  IM    
Affiliation:
Department of Biology, University of Essex, Colchester, United Kingdom.
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MeSH Terms
Descriptor/Qualifier:
Animals
Demography*
England
Feces / chemistry*
Fresh Water
Insecticides / analysis*,  pharmacokinetics
Otters* / metabolism
Polychlorinated Biphenyls / analysis*,  pharmacokinetics
Wales
Chemical
Reg. No./Substance:
0/Insecticides; 0/Polychlorinated Biphenyls

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


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