• Founding Editor, Aquaculture Economics and Management , Editor, 1996-2004, Editorial Board Member, 2005- present.
  
• Editorial Board member, Aquaculture , an international journal published by Elsevier.
  
• Executive Committee, International Association of Aquaculture Economics and Management, 1996-present; major activities include organizing and co-chairing the Socio-Economics Sessions at the annual World Aquaculture Association conferences.
  
• Western Regional Coordinating Committee, Seafood Marketing and the Management of Marine and Aquacultural Resources, 1999-present.
  
• Technical Committee, Center for Tropical and Subtropical Aquaculture, USDA, 1998-present, Chair, 2002.
  
• Invited as a discussant for the Symposium Fish to 2020: Implications of Global Fish Outlook for Developing Countries. 2 November, 2002, WorldFish Center, Penang, Malaysia.
  
• Invited to serve as a member of an external review panel of the Genetic Improvement of Aquaculture Species within the Biodiversity and Genetic Resources Research Program at the WorldFish Center, Penang, Malaysia, August 4 – 13, 2004.
  
• External Examiner, Asian Institute of Technology, Bangkok , Thailand , 1998.
  
• External Examiner, James Cook University , Australia , 1997.
  
• Technical Review Committee, Transportation Energy Strategy, State of Hawaii, 1994-1995.
  
• Scientific Committee, North American Association of Fisheries Economists (NAAFE) Conference, March 27-30, 2007 , Merida , Mexico.
  
• Scientific Committee, 2nd and 3 rd International Congress on Aquaculture, Fisheries Technology and Environmental Management, June 18-19, 2004 , November 3-4, 2006 , Athens , Greece.
  
• Scientific Committee, Third International Symposium on Stock Enhancement and Sea Ranching, September 18-21, 2006, Seattle, USA.
  
• Organizing Committee, International Symposium on the Analytic Hierarchy Process, ISAHP2005.
  
• Organizing Committee, Hawaii International Conference on Business, 2002.
  
• Organizing Committee, First International Conference on Multiple Objective Decision Support Systems for Agricultural and Environmental Management, Honolulu , July 23-29, 1995.
  
• Secretary, International Association of Aquaculture Economics and Management, 1993-1999.
  
• Organizing Committee, International Symposium on Socio-Economics of Aquaculture, December 14-17, 1993 , Keelung , Taiwan.
  
• China Committee, American Agricultural Economics Association. 1988-1990
  
• Editorial Board, Journal of Computer Applications, 1983-1986.
  
• Member, Technical Advisory Committee, Western Computer Consortium, 1983-1986.
  
• Reviewer for following journals: Aquaculture, Aquaculture Economics and Management, Aquaculture Research , Aquaculture International, Aquacultural Engineering, Journal of World Aquaculture Society, Israeli Journal of Aquaculture, Fisheries Research, North American Journal of Fisheries Management, Marine Resource Economics, AgriBusiness, Journal of Production Agriculture, Energy Systems and Policy, Agricultural Systems, Western Journal of Agricultural Economics, American Journal of Agricultural Econmics, Journal of Computer Applications, Annals of Tourism Research , Agricultural and Resource Economics Review , Bioresource Technology, Socio-Economic Planning Science, Food Policy, Environmental Management, Journal of Environmental Management , Economic Systems Research, International Journal of Environmental Technology and Management, Ecological Modeling, Journal of Agricultural and Applied Economics, Economics Bulletin, International Transactions in Operational Research , Environment and Development Economics, Ecological Economics, International Journal of Pest Management.
  
• Grant proposal reviewer: Sea Grants College Program ( Hawaii , Rhode Island and Florida ); USDA CSRS-National Research Initiatives Grant Program; USAID Pond Dynamics/Aquaculture Collaborative Research Support Program; Molokai Aquaculture Alliance; Natural Sciences and Engineering Research Council of Canada; BARD.
  
• Hosted 10 visiting professors from People's Republic of China , Israel , Japan , Norway , Canada and Taiwan.
  

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