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  • 1
    Electronic Resource
    Electronic Resource
    Bioaccumulation of selenium in birds at Kesterson Reservoir, California (1990)
    Springer
    Archives of environmental contamination and toxicology 19 (1990), S. 495-507 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract This study was conducted to determine selenium (Se) concentrations in tissues of birds collected during the 1983–1985 nesting seasons at Kesterson Reservoir (an area receiving high-Se irrigation drainage water), compare them with birds from reference sites within California's Central Valley, and relate them to food-chain Se concentrations at the study sites. Within years, Se in livers of adult birds collected early and late in the nesting season changed significantly at both Kesterson and the primary reference site (Volta Wildlife Area). These changes were related to the length of time birds had been present at the study sites and the associated accumulation (at Kesterson) or depuration (at Volta) of Se. All species showed significant location differences, which were greatest in species that occurred at Kesterson throughout the year or fed more consistently within the reservoir. There were few species differences in Se for birds at the reference sites (where food-chain Se levels were “normal” [⩽2 μg/g, dry wt]). At Kesterson (where bird foods generally contained 〉50 μg Se/g), species patterns varied by year, probably because of varying periods of residence and other factors. Se concentrations in kidneys and livers of American coots (Fulica americana) were significantly correlated (r=0.9845); Se concentrations in breast muscles and livers of juvenile ducks (Anas spp.) also were correlated (r=0.8280). Body weights of adult coots were negatively correlated with liver Se concentration. Lateseason resident breeding birds or pre-fledging juvenile birds reared at a site usually provided the best indication of sitespecific Se bioaccumulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01059067
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Trace elements and organochlorines in surf scoters from San Francisco Bay, 1985 (1991)
    Springer
    Environmental monitoring and assessment 18 (1991), S. 105-122 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Surf scoters (Melanitta perspicillata) were collected from 6 locations in San Francisco Bay during January and March 1985. Overall, mean concentrations of cadmium and zinc were higher in livers of scoters from the southern region of the Bay, whereas mean iron and lead were higher in those from the northern Bay region. Mean concentrations of arsenic, copper, lead, zinc, aluminum (January only) and iron (January) also differed among individual locations. Mean concentrations of copper and zinc increased, arsenic decreased, and cadmium remained the same between January and March. Selenium and mercury concentrations in scoter livers were not significantly correlated (P〉0.05), but cadmium concentrations in livers and kidneys were positively correlated (P〈0.0001), and body weight was negatively related to mercury concentration in the liver (P〈0.05). Body weight differed among locations but not between January and March. Body weight was correlated with lipid content (P〈0.0001). DDE and PCBs were each detected in 34 of 36 scoter carcasses. DDE increased significantly between January and March at Richmond Harbor, but BCBs did not differ between January and March at the 3 locations that could be tested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394973
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Organochlorines and selenium in California night-heron and egret eggs (1990)
    Springer
    Environmental monitoring and assessment 15 (1990), S. 91-104 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Exceptionally high concentrations of DDE were found in black-crowned night-heron (Nycticorax nycticorax) (geometric mean 8.62 μg g−1 wet wt.) and great egret (Casmerodius albus) (24.0 μg g−1) eggs collected from the Imperial Valley (Salton Sea), California in 1985. DDE concentrations in 14 of the 87 (16%) randomly selected night-heron eggs from six colonies (two in San Francisco Bay, three in the San Joaquin Valley, and one at Salton Sea) were higher than those associated with reduced reproductive success of night-herons (8 μg g−1). In addition, mean shell thickness of night-heron eggs collected from the San Joaquin Valley and from San Francisco Bay during 1982–1984 was significantly less than pre-DDT thickness and was negatively correlated (r=−0.50, n=75, P〈0.0001) with DDE concentration. Mean selenium concentration in night-heron eggs from Salton Sea (1.10 μg g−1) was significantly higher than in eggs from three locations in the San Joaquin Valley, and in egret eggs from Salton Sea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00454751
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    Paper (German National Licenses)
    Fulltext
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