COMPARISON OF TRACE ELEMENT CONCENTRATIONS IN TISSUES OF THE CHICK AND ADULT ADELIE PENGUINS (17th Symposium on Polar Biology)
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概要
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To improve knowledge of heavy metals accumulated in Adelie penguins (Pygoscelis adeliae), concentrations of Cd, Cu, Zn, Hg, Pb, Se, Mn and Fe were measured in livers, kidneys, muscles, skin and feathers collected from 12 chicks and 11 adult penguins which were captured at breeding sites at Cape Hinode and in Hukuro Cove during the chick-rearing period, from 1 January to 9 February, 1991. Antarctic krills (Euphausia superba) collected from the stomach content of adult penguins were also analyzed. Higher concentrations of heavy metals were found in the liver and kidney than in other tissues. The average trace element concentrations of adult penguins were in the order Fe(635 μg/g wet)>Zn(29.3)>Cu(6.4)>Mn(2.1)>Cd(1.9)>Se(1.4)>Pb(0.31)>Hg(0.18) for the liver, and Fe(280)>Zn(29.8)>Cd (14.7)>Cu(3.5)>Se(2.7)>Mn(1.2)>Hg(0.16)>Pb(0.13) for the kidney. Cadmium and Hg concentrations in the liver, kidney, muscle and skin of Adelie penguins increased with growth; this fact suggests that Cd and Hg were accumulated in the body through food. The Fe concentrations of adults were significantly higher in both pectoral and femoral muscles than those of the chicks (t-test, p<0.01). This might be related to the excellent diving ability of the adult penguin. The conversion ratios of Hg concentrations between feather, liver and pectoral muscle of the adults were calculated at 3:5:1. A comparison of heavy metals of adult Adelie penguins captured in 1981 and those in 1991 indicates that both Hg and Pb concentrations in liver, kidney, muscles and skin of the 1991 samples were obviously higher than those of the 1981 samples.
- 国立極地研究所の論文
著者
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MIYAZAKI Nobuyuki
Ocean Research Institute, The University of Tokyo
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NAITO Yasuhiko
National Institute of Polar Research
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Miyazaki Nobuyuki
Otsuchi Marine Research Center, Ocean Research Institute, University of Tokyo
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Naito Yasuhiko
National Inst. Of Polar Res. Tokyo Jpn
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Watanuki Yutaka
Department Of Agriculture Hokkaido University
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KURAMOCHI Toshiaki
Tokyo University of Agriculture and Technology
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YAMAMOTO Yoshikazu
Kobe College
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KANESAKI Satoko
Kobe College
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Kuramochi T
Tokyo University Of Agriculture And Technology
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Miyazaki Nobuyuki
Ocean Research Institute The University Of Tokyo
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