抱卵期におけるウミネコの血漿テストステロン濃度  [in Japanese] Plasma Testosterone Levels of Incubating Black-tailed Gulls  [in Japanese]

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Author(s)

    • 風間 健太郎 Kazama Kentaro
    • 北海道大学水産科学院資源生態学領域 Laboratory of Marine Ecology, Graduate School of Fisheries Sciences, Hokkaido University
    • 坂本 健太郎 Q. Sakamoto Kentaro
    • 北海道大学大学院獣医学研究科環境獣医科学講座毒性学教室 Laboratory of Toxicology, Graduate School of Veterinary Medicine, Hokkaido University
    • 綿貫 豊 Watanuki Yutaka
    • 北海道大学水産科学院資源生態学領域 Laboratory of Marine Ecology, Graduate School of Fisheries Sciences, Hokkaido University

Abstract

In some avian species, male plasma testosterone levels are maximum during the courtship or copulation periods, but decline abruptly once incubation starts. However, testosterone levels of male Black-tailed Gulls <i>Larus crassirostris</i> during the course of breeding remain unknown. In 2006, blood samples of 23 incubating males were collected at Rishiri Island, Hokkaido, Japan and testosterone was measured by enzyme immunoassay kit. Plasma testosterone level (mean±S.E.: 0.737±0.282 ng/ml) was assumed to decline with elapsed days from the onset of incubation, as shown in other species.

Journal

  • Journal of the Yamashina Institute for Ornithology

    Journal of the Yamashina Institute for Ornithology 39(2), 112-116, 2008

    Yamashina Institute for Ornitology

Codes

  • NII Article ID (NAID)
    130000446516
  • NII NACSIS-CAT ID (NCID)
    AA11864856
  • Text Lang
    JPN
  • ISSN
    1348-5032
  • NDL Article ID
    9425935
  • NDL Source Classification
    ZR4(科学技術--生物学--動物)
  • NDL Call No.
    Z18-78
  • Data Source
    NDL  J-STAGE 
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