DEVELOPMENT OF PROTECTIVE SHELTER FOR STOCKED ROCK FISH JUVENILES

• MIYAGAWA Masashi

  香川県水産試験場 環境資源研究部門

• KAMEYAMA Takeshi

  日本興業株式会社 開発部

• FUJIWARA Munehiro

  香川県水産試験場 環境資源研究部門

• YASUOKA Kaori

  日特建設株式会社 技術部

• MATSUUCHI Yuki

  香川大学大学院工学研究科

• SUENAGA Yoshihiro

  香川大学工学部 安全システム建設工学科

Bibliographic Information

Other Title

• 岩礁性魚類幼稚魚放流用シェルターの開発

Abstract

 Oblong rockfish, Sebastes oblongus, and red spotted grouper, Epinephelus akaara, one of the highpriced fishes, have been released for stock enhancement in Kagawa prefecture in Japan. Released artificial juveniles of these species are easily preyed by predators after release due to their vulnerable characteristics such as sluggish movement and defenseless behavior. This fact have led to poor recovery rate in stocking project of these species artificial juveniles in Kagawa prefecture over the past dozen years. Therefore, we propose the new protective shelter for released juveniles in this study for the sake of avoiding intense predation by overwhelming predators. This shelter also functions as nursery ground with both remarkable amount of adherent prey organisms on the porous substrate and dark comfortable rooms. It is characterized by the size of gaps that small released juveniles can easily hide in and enourmous strong predators hardly sneak into.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 68 (2), I_1221-I_1226, 2012

  Japan Society of Civil Engineers

Keywords

• rock fish juveniles
• predators
• protective shelter
• appropriate size
• artificial reef

Details

• CRID: 1390001205354339328
• NII Article ID: 130004961475
• DOI: 10.2208/jscejoe.68.i_1221
• ISSN: 21854688
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed