耳石微量元素分析による広島県太田川サツキマスの回遊履歴の推定  [in Japanese] Application of Otolith Microchemistry to Reconstruct for Migration History of Amago Salmon Oncorhynchus masou ishikawai, Captured at the Ohta River  [in Japanese]

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Author(s)

Abstract

広島県太田川で捕獲されたサツキマス27個体の回遊履歴を耳石Sr/Ca比を用いて推定した。調査に用いた27個体中26尾が降海型サツキマスであり, そのうち2尾が汽水域を主な生活領域にしていた。太田川の大部分のサツキマスは1月中旬に汽水域に移動し, 2月中旬から6月中旬まで沿岸域を回遊することが判明した。

To reconstruct migratory history of amago salmon Oncorhynchus masou ishikawai, captured in the Ohta River, the otolith Sr/Ca concentration ratios as life history transect in accordance with the migration pattern between sea and freshwater were analyzed by wave-length dispersive X-ray electron microprobe. Based on otolith Sr/Ca concentration ratios, 26 out of 27 individuals were categorized as belonging to an anadromous population. Of these anadromous individuals, two fish migrated between estuarine water and freshwater. Tracing the migratory history, a typical anadromous population migrated into the estuary in mid-January, then into the coastal water in mid-February and, subsequently, returned to the river in mid-June.

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 67(4), 647-657, 2001-07-15

    The Japanese Society of Fisheries Science

References:  40

Cited by:  6

Codes

  • NII Article ID (NAID)
    110003145319
  • NII NACSIS-CAT ID (NCID)
    AN00193422
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00215392
  • NDL Article ID
    5848714
  • NDL Source Classification
    ZR26(科学技術--農林水産--水産)
  • NDL Call No.
    Z18-345
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE  NDL-Digital  JASI 
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