• Founding Editor, Aquaculture Economics and Management , Editor, 1996-2004, Editorial Board Member, 2005- present.
  
• Editorial Board member, Aquaculture and Reviews in Aquaculture.
  
• Visiting Fellow/Professor/Scientist: Asian Development Bank Institute, UN Food and Agricultural Organization, City University of Hong Kong, Norwegian College of Fisheries Sciences, National Taiwan Ocean University, Jilin University, East-West Center, CIAD, A.C. Unidad Mazatlán.
• 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; James Cook University; University of British Columbia; City University of Hong Kong.
  
• Technical Review Committee, Transportation Energy Strategy, State of Hawaii, 1994-1995.
  
• Conference Organizing/Scientific Committees: North American Association of Fisheries Economists (NAAFE) Conference, 2007; 2nd and 3rd International Congress on Aquaculture, Fisheries Technology and Environmental Management, 2004 and 2006; Third International Symposium on Stock Enhancement and Sea Ranching, 2006; International Symposium on the Analytic Hierarchy Process, ISAHP2005; Hawaii International Conference on Business, 2002; First International Conference on Multiple Objective Decision Support Systems for Agricultural and Environmental Management, 1995; International Symposium on Socio-Economics of Aquaculture, 1993.
  
• Secretary, International Association of Aquaculture Economics and Management, 1993-1999.
  
• 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, North American Journal of Aquaculture, Israeli Journal of Aquaculture, Reviews in Aquaculture, Fisheries Research, North American Journal of Fisheries Management, Reviews of Fisheries Science, Marine Resource Economics, Marine and Freshwater Research, AgriBusiness, Journal of Production Agriculture, Energy Systems and Policy, Agricultural Systems, Western Journal of Agricultural Economics, American Journal of Agricultural Economics, 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, European Journal of Operational Research, Environment and Development Economics, Ecological Economics, International Journal of Pest Management; Energy.
  
• 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; Southern Regional Aquaculture Center; Netherlands Foundation for the Advancement of Tropical Research; National Science Foundation.
  
• Hosted 11 visiting professors from People's Republic of China , Israel , Japan , Norway , Canada and Taiwan.
  

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