宮古湾で産卵を終えたニシンの回遊生態と翌年の産卵回帰  [in Japanese] Migration ecology of the herring Clupea pallasii after spawning in Miyako Bay and homing in the following year  [in Japanese]

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Abstract

岩手県宮古湾で産卵直後のニシン成魚を採捕し,2 年間で合計 500 尾を標識放流した。放流後 3 年 2 ヶ月間で合計 114 尾の標識魚が再捕され,再捕率は 22.8% であった。これらの再捕経過から,宮古湾で産卵を終えたニシンは速やかに産卵場を離れて北上回遊し,夏季には宮古湾の 300 km 北方の北海道噴火湾海域に生息すると考えられた。放流翌年の産卵期には合計 32 尾が成熟して宮古湾内で再捕され,これらは噴火湾から南下した産卵回帰個体と判断された。本州沿岸で産卵するニシンは,標識魚と同様の回遊生態を持つと考えられた。<br>

  We tagged and released 500 set net caught herring <i>Clupea pallasii</i> which had just finished spawning in Miyako Bay (MB) in the winter of 2003 and 2004. A total of 114 tag recaptures, i.e. 22.8% recapture rate, were obtained during a period of 3 years 2 months after release. Based on recaptures it was found that fish left MB shortly after spawning and migrated northward in spring and inhabited Funka Bay (FB), 300 km north of MB in summer. In the spawning season of the year following tagging and releasing, 18 (from 2003 release group) and 14 (from 2004 release group) maturing fish were recaptured in MB. Through the tag recapture of these two release groups and the already known ecological information of artificial herring juveniles released in MB until first maturing, it was considered that the herring has migrated between MB and FB seasonally, and has spawned in MB every year. Our results suggest that herring reproducing along the coast of Honshu have similar ecological characteristics concerning migration and homing as herring released in MB.<br>

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 74(3), 389-394, 2008-05-15

    The Japanese Society of Fisheries Science

References:  11

Cited by:  1

Codes

  • NII Article ID (NAID)
    110006689313
  • NII NACSIS-CAT ID (NCID)
    AN00193422
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00215392
  • NDL Article ID
    9520549
  • 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  IR  J-STAGE 
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