data (Englehardt, 1995) can be a useful indicator of cost-effective management strategies. Its principal value in decision-making is as a strategic tool, illuminating the dimensions of a problem and the implications of alternatives. As knowledge of the marine environment, potential threats, and control technologies improves, (making more extensive and reliable data available for risk assessments), risk analysis will become more accurate in establishing levels of protection and more effective as a planning aid and a decision-making tool.
AQIS. 1993. Report No. 2: Shipping Ballast Water Trials on the Bulk Carrier M.V. Iron Whyalla. Report prepared for the Australian Quarantine and Inspection Service, Department of Primary Industries and Energy. Canberra: Australian Government Publishing Service.
Carlton, J.T., D.M. Reid, and H. van Leeuwen. 1995. The Role of Shipping in the Introduction of Nonindigenous Aquatic Organisms to the Coastal Waters of the United States (other than the Great Lakes) and an Analysis of Control Options. Washington, D.C.: U.S. Coast Guard and U.S. Department of Transportation, National Sea Grant College Program/Connecticut Sea Grant. USCG Report Number CG-D-11-95. NTIS Report Number AD-A294809.
Chesapeake Bay Commission. 1992. Chesapeake Bay Policy for the Introduction of Nonindigenous Aquatic Species. Annapolis, Maryland: Chesapeake Bay Commission.
Chesapeake Bay Commission. 1995. The Introduction of Nonindigenous Species to the Chesapeake Bay Via Ballast Water, January 5. Annapolis, Maryland: Chesapeake Bay Commission.
Chief of Naval Operations. 1994. Instruction 5090.1B, Section 19-10. Ship Ballast Water and Anchor System Sediment Control (November 1). Arlington, Virginia: Office of the Chief of Naval Operations.
Englehardt, J.D. 1995. Analysis of Risks of Nonindigenous Species Invasions. Presentation to the Committee on Ships' Ballast Operations, NRC Georgetown Facility, Washington, D.C., October 2, 1995.
ICES. (in press). Proceedings of the 1995 Annual Scientific Conference of the International Council for the Exploration of the Sea, held September 21–29, 1995 in Aalborg, Denmark .
IMO. 1993. Resolution A. 774(18), International Guidelines for Preventing the Introduction of Unwanted Aquatic Organisms and Pathogens from Ships' Ballast Water and Sediment Discharges. London: International Maritime Organization.
NRC. 1994. Building Consensus Through Risk Assessment and Management of the Department of Energy's Environmental Remediation Program. Commission to Review Risk Management in the Department of Energy's Environmental Remediation Program, National Research Council. Washington, D.C.: National Academy Press.
Orr, R.1995. The Proposed Nonindigenous Aquatic Organisms Risk Analysis Review Process. Presentation to the Committee on Ship's Ballast Operations, Irvine, California, February 7, 1995.
Rigby, G., and A. Taylor. 1994. Ocean Exchange of Ships' Ballast Water to Minimise the Transfer of Harmful Marine Organisms: Review of Research Work and Recommendations for the Use of Different Options. Report BHPR/ENV/R/94/015. Prepared for the Australian Quarantine and Inspection Service. Melbourne, Australia: Broken Hill Proprietary.
Risk Assessment and Management Committee. 1995. Draft Generic Nonindigenous Aquatic Organisms Risk Analysis Review Process. Risk Assessment and Management Committee, Aquatic Nuisance Species Task Force (July 10).
Transport Canada. 1995. Ballast Water Exchange Study, Phase I. Ottawa, Canada: Melville Shipping for Transport Canada Marine Regulatory Directorate.
Woodward, J.B., M.G. Parsons, and A.W. Troesch. 1992. Ship operational and safety aspects of ballast water exchange at sea. Marine Technology 31(4):315–326.