Fisheries Science

, Volume 76, Issue 4, pp 561–570 | Cite as

Estimating larval supply of Ezo abalone Haliotis discus hannai in a small bay using a coupled particle-tracking and hydrodynamic model: insights into the establishment of harvest refugia

  • Yoichi MiyakeEmail author
  • Shingo Kimura
  • Tomohiko Kawamura
  • Takashi Kitagawa
  • Motoyuki Hara
  • Hiroshi Hoshikawa
Original Article Fisheries


Most juveniles of Haliotis discus hannai have been found to be descendants of wild individuals, although most adults were artificially produced (released) individuals as a result of restocking inside the refugium located near the head of Oshoro Bay, Hokkaido, Japan. To estimate the larval supply from released and wild individuals into the refugium and to compare the suitability of locations as larval sources, we simulated larval dispersal using a coupled hydrodynamic and particle-tracking model. The simulation results indicated that more larvae may be supplied from the wild adults inside the bay to the refugium than from the released adults. These results are consistent with the observed high abundance of wild juveniles in the refugium. Most larvae from the refugium were predicted to disperse out of the bay. We found that larval retention in the bay was at least one order of magnitude higher than that in the refugium. Thus, it may be more effective in terms of self-replenishment and reproduction if the refugium were to be expanded to the bay scale. There were only minor differences among the compared sites at the head of the bay in terms of their suitability as larval sources. Consequently, the establishment of new refugia in this area could be expected to provide an effectiveness equal to that of the current refugium.


Abalone Delft3D Larval dispersal Marine reserves Harvest refugia Hydrodynamics Numerical modeling 



We are grateful to Y. Machiguchi for providing the bathymetry data. We are also grateful to K. Kawamoto for boat operation.


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Copyright information

© The Japanese Society of Fisheries Science 2010

Authors and Affiliations

  • Yoichi Miyake
    • 1
    Email author
  • Shingo Kimura
    • 1
  • Tomohiko Kawamura
    • 1
  • Takashi Kitagawa
    • 1
  • Motoyuki Hara
    • 2
  • Hiroshi Hoshikawa
    • 3
  1. 1.Atmosphere and Ocean Research InstituteThe University of TokyoKashiwaJapan
  2. 2.National Research Institute of AquacultureFisheries Research AgencyMinami-iseJapan
  3. 3.Central Fisheries Research InstituteHokkaido Research OrganizationYoichiJapan

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