Variation in the numbers of adult returns and released fry for chum salmon <I>Oncorhynchus keta</I> caused by the Great East Japan Earthquake in Miyagi Prefecture

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  • Shiraishi Kazunari
    Freshwater Fisheries Experimental Station, Miyagi Prefecture Fisheries Technology Institute

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Other Title
  • 宮城県における東日本大震災によるサケの放流数と回帰数の変動
  • ミヤギケン ニ オケル ヒガシニホン ダイシンサイ ニ ヨル サケ ノ ホウリュウスウ ト カイキスウ ノ ヘンドウ

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Abstract

I compared contrasts of the numbers of released fry chum salmon from hatcheries and their returns before and after the 2011 Great East Japan Earthquake. Numbers of released fry in 2010 and 2011 brood years and adult returns in 2014-2015 were lower than those of previous year groups because of the negative effect of the earthquake, whereas their return rate showed no change. This result suggests that the decrease in adult return may be caused by the number of released fry in the 2010 brood year.

Journal

  • Aquaculture Science

    Aquaculture Science 65 (2), 161-163, 2017-06-20

    Japanese Society for Aquaculture Science

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