Organochlorine Residues in South American Sea Lions, Otaria flavescens (Shaw, 1800): Bioaccumulation and Time Trends

Blubber from stranded South American sea lions (Otaria flavescens) was sampled between 1991 and 2005 on the Peninsula Valdés in Argentina and analyzed for organochlorine (OC) pollutants. Mean blubber concentrations, expressed on an extractable basis, were 686 (SD = 1,060) ng g⁻¹ for dichlorodiphenyl...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 2010-06, Vol.84 (6), p.731-737
Main Authors: Borrell, A, Garcia-Solà, A, Aguilar, A, García, N. A, Crespo, E. A
Format: Article
Language:English
Subjects:
Adipose Tissue - metabolism
Animals
Aquatic mammals
Aquatic Pollution
Bioaccumulation
DDT (pesticide)
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental Monitoring
Female
Gas Chromatography-Mass Spectrometry
Hydrocarbons, Chlorinated - analysis
Hydrocarbons, Chlorinated - pharmacokinetics
Male
Marine
Marine mammals
Organic compounds
Otaria flavescens
PCB
Pesticide Residues - analysis
Pesticide Residues - pharmacokinetics
Pollution
Polychlorinated biphenyls
Sea lions
Sea Lions - growth & development
Sea Lions - metabolism
Soil Science & Conservation
South America
Sublethal effects
Tissue Distribution
Toxicology
Trends
Waste Water Technology
Water Management
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - pharmacokinetics
Water pollution
Water Pollution Control
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Summary:Blubber from stranded South American sea lions (Otaria flavescens) was sampled between 1991 and 2005 on the Peninsula Valdés in Argentina and analyzed for organochlorine (OC) pollutants. Mean blubber concentrations, expressed on an extractable basis, were 686 (SD = 1,060) ng g⁻¹ for dichlorodiphenyl trichloroethane (tDDT) and 735 (SD = 787) ng g⁻¹ for polychlorinated byphenils (PCB). The OC levels were well below those associated with adverse sublethal effects and lethality in mammals. OC concentrations showed statistically significant associations with age that were positive in males and negative in females. These trends are consistent with the majority of marine mammal populations studied. There were no trends in the levels of tDDT or PCB over time. In spite of the low levels detected, OC contamination was present consistently over the 14-year period, suggesting continuous inputs from geographic redistribution.
ISSN:0007-4861
1432-0800
DOI:10.1007/s00128-010-0025-x