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  • 1990-1994  (9)
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  • 1
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    Mercury accumulation and excretion in laboratory reared black-headed gullLarus ridibundus chicks (1991)
    Springer
    Details
    Publication Date: 1991-08-01
    Print ISSN: 0090-4341
    Electronic ISSN: 1432-0703
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by Springer
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    PAPER CURRENT
  • 2
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    The role of eggs in mercury excretion by Quail Coturnix coturnix and the implications for monitoring mercury pollution by analysis of feathers (1993)
    Springer
    Details
    Publication Date: 1993-03-01
    Print ISSN: 0963-9292
    Electronic ISSN: 1573-3017
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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    PAPER CURRENT
  • 3
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    The Relationship Between Kleptoparasitism and Plumage Polymorphism in the Arctic Skua Stercorarius parasiticus (L.) (1991)
    Wiley
    Details
    Publication Date: 1991-01-01
    Print ISSN: 0269-8463
    Electronic ISSN: 1365-2435
    Topics: Biology
    Published by Wiley on behalf of British Ecological Society.
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  • 4
    Electronic Resource
    Electronic Resource
    Temporal and spatial variation in mercury concentrations in some albatrosses and petrels from the sub-Antarctic (1993)
    Springer
    Polar biology 13 (1993), S. 239-244 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mercury concentrations in albatrosses and some other large procellariiforms are very much higher than found in other groups of seabirds. Analysis of mercury concentrations in feather samples collected prior to 1950 and after this date showed slight, but significant, increases in three out of ten sub-Antarctic procellariiform species. The lack of widespread and pronounced increases in mercury concentrations in procellariiforms between these periods may indicate that industrial and agricultural emissions of mercury in the southern hemisphere have been relatively minor and the high concentrations are predominantly due to natural processes. Mercury concentrations were relatively consistent between body feathers of individuals, and showed no variation related to adult age (in years). Within species, mercury concentrations tended to be highest in New Zealand populations and lowest in Falkland Island and South Georgia populations. Mercury concentrations also varied among species, but not in a way that could be related to diet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238759
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Mercury accumulation and excretion in laboratory reared black-headed gullLarus ridibundus chicks (1991)
    Springer
    Archives of environmental contamination and toxicology 21 (1991), S. 316-320 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Distribution of mercury between tissues was investigated in black-headed gull (Larus ridibundus) chicks fed doses of methyl mercury. Mercury accumulated differentially in the internal tissues, concentrations in the kidney exceeding those in the liver, which in turn exceeded those in the muscle. All feather types contained higher mercury concentrations than internal tissues. For each dose group, there was a progressive and pronounced reduction in the concentrations of mercury found in the primary feathers as the growth sequence progressed. The amount of mercury given to the birds affected the proportion of mercury deposited in the kidney, carcass, and primaries. The amount of mercury administered had no effect on the proportion of mercury excreted either in the faeces or the feathers. 71% of the doses given was excreted over the fledging period, and 49% of the dose was found in the plumage. These figures allow a more quantitative approach to measuring mercury pollution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01055352
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  • 6
    Electronic Resource
    Electronic Resource
    Differences in mercury contamination and elimination during feather development in gull and tern broods (1994)
    Springer
    Archives of environmental contamination and toxicology 27 (1994), S. 162-167 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Eggs, feathers (down, body feathers from side/shoulder and back) and some dead chicks (liver) from broods of three species, herring gull (Larus argentatus), black-headed gull (Larus ridibundus), and common tern (Sterna hirundo) from the German North Sea coast were collected to study intersibling differences in mercury contamination and elimination into the growing feathers. The mercury contamination in eggs, feathers, and liver of the terns was about four times that of the gulls; black-headed gulls had lowest mercury concentrations. The body feathers grown when the chicks became older had lower mercury levels than down in the more contaminated species (11% lower in herring gulls, 49% in common terns), indicating the advancing decontamination of the body by the plumage development. The elimination of mercury was greater in chicks with higher mercury levels. Down of the first hatched herring gull and common tern chick contained more mercury than down of the siblings hatched later, because of its higher burden derived from the first laid egg.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00214258
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  • 7
    Electronic Resource
    Electronic Resource
    Mercury concentrations in seabirds from colonies in the northeast Atlantic (1992)
    Springer
    Archives of environmental contamination and toxicology 23 (1992), S. 383-389 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Total mercury concentrations were determined in samples of body feathers from a range of common seabird species breeding at L»trabjarg, northwest Iceland, St. Kilda, Foula and the Firth of Forth, Scotland and Bleiksøy, Syltefjord, and Hornøy, Norway. Seabirds from L»trabjarg generally exhibited the highest mercury concentrations, with a trend of decreasing mercury concentrations in a southwest to northeast direction in seabirds at the other colonies; seabirds at Hornøy were generally found to have the lowest mercury concentrations. Some species at the Firth of Forth exhibited relatively elevated mercury concentrations compared to those at Foula and Norwegian sites. Inter-colony differences in diet were thought to be relatively small for most species and unlikely to account for the range of mercury concentrations measured in the seabirds (L»trabjarg: lowest arithmetic mean mercury concentration in common guillemots Uria aalge, 1.6 μg/g, s.d.=0.6, n=45; highest arithmetic mean mercury concentration in kittiwakes Rissa tridactyla, 5.5 μg/g, s.d.=1.7, n=36). The oceanic transport of mercury, together with the effects of anthropogenic inputs of mercury to the northeast Atlantic, and the removal of mercury from the water column via biological activity are discussed as influential factors determining the observed patterns of mercury concentration in seabirds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00216249
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  • 8
    Electronic Resource
    Electronic Resource
    Seasonal variation in heavy metal levels in tissues of common guillemots, Uria aalge from Northwest Scotland (1994)
    Springer
    Archives of environmental contamination and toxicology 27 (1994), S. 168-175 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Mercury, cadmium, zinc, and copper concentrations were analyzed in three samples of common guillemot (in April, June, and November). Levels measured were uniformly low, and not enough to have any toxic effects. Adult guillemots had significantly more cadmium in their livers and kidneys than juveniles, with juvenile levels ranging from 25% to 89% of adult levels. Mercury concentrations in liver and kidney were also higher in adults. Juvenile levels represented from 80% to 94% of adults, but there were no age differences in feather and muscle mercury. Mercury levels declined throughout the year in internal tissues from April through June to November. There was a strong seasonal fluctuation in cadmium levels in liver and kidney, rising significantly between April and June and declining again from June to November. These changes were apparent in both adult and juvenile birds. The influences of seasonal processes (namely breeding and moult) and seasonal dietary differences as causative factors in the changes in metal burdens are discussed. These findings have implications for the use of seabirds as monitors of heavy metals in the marine environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00214259
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  • 9
    Electronic Resource
    Electronic Resource
    The role of eggs in mercury excretion by Quail Coturnix coturnix and the implications for monitoring mercury pollution by analysis of feathers (1993)
    Springer
    Ecotoxicology 2 (1993), S. 55-64 
    Details
    ISSN: 1573-3017
    Keywords: mercury ; eggs ; feathers ; quail ; dose-response
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: This paper describes differences in the excretion of methyl mercury between male and female Quail Coturnix coturnix after a single dose. Since feathers are often used to monitor mercury pollution it is important to take into account biases in feather mercury levels that may arise as a result of mercury loss through egg-laying. Evidence is presented to support the use of bird eggs to sample for environmental mercury contamination. Birds were monitored up to twelve weeks after administration. Mercury concentrations in the kidney exceeded those in the liver which exceeded those in the pectoral muscle. Significant differences in mercury levels between male and female birds were found up to eight weeks after administration. Mercury was initially distributed through most of the internal tissues and was lost relatively slowly in a negative exponential manner. Mercury loss through excretion differed between the sexes for the first eight weeks after mercury administration. Initial mercury concentration in eggs was 3.5 μg g-1 but no mercury was detected in eggs five weeks after the dose was administered. At this point over 40% of the females' intake had been lost into the eggs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00058214
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