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Human-Caused Mortality and Injury of NMFS-managed Alaska Marine Mammal Stocks, 2014-2018
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2020
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Description:Section 117 of the Marine Mammal Protection Act (MMPA) requires the National Marine Fisheries Service (NMFS) to estimate human-caused marine mammal mortality and serious injury. Data from documented interactions between human activities and pinnipeds or cetaceans belonging to stocks which appear in the Alaska Marine Mammal Stock Assessment Reports (SARs) were compiled for the 5-year period from 2014 through 2018. A total of 1,001 unique interactions with evidence of human-caused mortality or injury are summarized in this report. Details for all reported human-marine mammal interactions (approximately 3,500) were first assessed for evidence of human-caused injury or mortality of the marine mammal; injuries and mortalities that could not be attributed with high confidence to human causes were excluded from further analysis. Injury severity determinations were then made for those injuries considered with high confidence to be human-caused. Injury determination details, including the injury cause, type, severity (non-serious, serious, or prorated serious), and criteria supporting the determination, are presented in Appendix Table 1.1. Records of human-caused mortality, assigned to cause, are also included in this report and presented in Appendix Table 1.1. Mortality or injury values were assigned to each interaction for comparison with the potential biological removal (PBR) levels, calculated under the MMPA, for each stock in the Alaska SARs. The mortality and injury values included in this report are derived solely from documented interactions. Not all human-caused mortality and injury of marine mammals is documented, so this report represents a minimum count of human-caused mortality and injury of Alaska marine mammal stocks.
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Rights Information:Public Domain
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Compliance:Submitted
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