Effect of Shaded Rearing and Automatic Feeding on Reaction to Angling for Masu Salmon <I>Oncorhynchus masou masou</I>

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  • Miyamoto Kouta
    Freshwater Fisheries Research Division, National Research Institute of Aquaculture, Fisheries Research Agency
  • Nakamura Tomoyuki
    Freshwater Fisheries Research Division, National Research Institute of Aquaculture, Fisheries Research Agency

Bibliographic Information

Other Title
  • 遮光と給餌方法がヤマメの釣獲特性に与える影響
  • シャコウ ト キュウジ ホウホウ ガ ヤマメ ノ ツリカクトクセイ ニ アタエル エイキョウ

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Description

The effects of shaded rearing and automatic feeding in juvenile masu salmon were examined to develop rearing techniques that produces fish which are more difficult to catch by angling. For one month, one hundred fish were placed in each of 4 different rearing tanks; 1, in a shaded tank with an automatic feeder; 2, in a shaded tank where the fish were hand fed; 3, in an open tank with an automatic feeder and 4, in an open tank where the fish were hand fed. The reared fish were moved to a concrete pond, and a one day angling trial (100 casts with bait) was conducted for each rearing group. The number of fish which were caught and fish which were not caught but that took the bait into their mouth was significantly less in the fish reared in the shaded tanks. No significant difference was observed between the fish, fed by hand and the automatic feeder. These results show that the fish reared in shaded tanks are more difficult to catch than fish reared in open tanks.

Journal

  • Aquaculture Science

    Aquaculture Science 62 (3), 253-258, 2014

    Japanese Society for Aquaculture Science

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