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NOAA Technical Memorandum NMFS-AFSC-315

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Human-caused injury and mortality of NMFS-managed Alaska marine mammal stocks, 2010-2014

Abstract

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 2010 through 2014. A total of 818 unique interactions with potential evidence of human-caused mortality or injury were reviewed and are summarized in this report. Details regarding each interaction were assessed for evidence of human-caused injury to the marine mammal and injury severity determinations were made for those injuries likely to be human-caused. Records of mortality are also included in this report, and assigned to source. Injury determination details regarding the injury source, type, severity, and criteria supporting the determination are presented in the appendices. Mortality and injury values were assigned to each interaction for comparison with the potential biological removal (PBR) levels for each stock calculated under the MMPA and appearing within the Alaska SARs.


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