The Marine Mammal Protection Act provides only general guidance on assessment methods and on the content of marine mammal stock assessment reports. As a result, NOAA Fisheries and the U.S. Fish and Wildlife Service have held a series of workshops since 1994 to develop guidelines that may be consistently applied nationally to marine mammal stock assessments.
The guidelines for assessing marine mammal stocks were revised in 2016:
2016 Revision to the GuidelinesGuidelines for Preparing Stock Assessment Reports Pursuant to the 1994 Amendments to the MMPA (PDF, 24 pages)
2011 Guidelines for Assessing Marine Mammal Stocks Workshop ReportGuidelines for Assessing Marine Mammals Stocks: Report of the 2011 GAMMS III Workshop (PDF, 107 pages)
2005 Revisions to GuidelinesRevisions to Guidelines for Assessing Marine Mammal Stocks (GAMMS II) (PDF, 25 pages)
1996 Guidelines for Assessing Marine Mammal Stocks Workshop Report and Revisions to GuidelinesReport of the Guidelines for Assessing Marine Mammal Stocks Workshop (PDF, 97 pages)
1995 Workshop Report and Revisions to Guidelines
U.S. Marine Mammal Stock Assessments: Guidelines for Preparation, Background, and a Summary of the 1995 Assessments (PDF, 80 pages)