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 Miyake, Shingo Kimura, Tomohiko Kawamura, Takashi Kitagawa, Motoyuki Hara, Hiroshi Hoshikawa

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)561-570
Number of pages10
JournalFisheries Science
Volume76
Issue number4
DOIs
Publication statusPublished - 2010 Jun 17
Externally publishedYes

Keywords

  • Abalone
  • Delft3D
  • Harvest refugia
  • Hydrodynamics
  • Larval dispersal
  • Marine reserves
  • Numerical modeling

ASJC Scopus subject areas

  • Aquatic Science

Fingerprint Dive into the research topics of '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'. Together they form a unique fingerprint.

Cite this