![]() Death related to human interaction was found in every age class. Mortalities in sub-adults were due to trauma, malnutrition, and infectious disease and in adults due to bacterial infections, emaciation and blunt force trauma. Causes of calf mortalities included infectious disease, nutritional, and congenital malformations. Of the 53 cases, cause of death was determined for 22 (42%) and nine additional animals demonstrated findings of significant importance for population health. We reviewed pathology reports from 53 animals that stranded in the eastern Pacific Ocean and Hawaii between 20 and used data from 35 animals that stranded from 2001 to 2017 to assess association with morphometrics, blubber thickness, body condition and cause of death. ![]() Understanding health and mortality in killer whales ( Orcinus orca) is crucial for management and conservation actions. Gaydos, Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Visualization, Writing – original draft, Writing – review & editing 16 Delaney, Investigation, Resources, Writing – review & editing, 10 Lisa Spaven, Investigation, Resources, Writing – review & editing, 7 Teri Rowles, Conceptualization, Funding acquisition, Writing – review & editing, 11 Lynne Barre, Conceptualization, Funding acquisition, Writing – review & editing, 12 Paul Cottrell, Funding acquisition, Investigation, Resources, Writing – review & editing, 13 Graeme Ellis, Conceptualization, Resources, Writing – review & editing, 7 Tracey Goldstein, Investigation, Resources, Writing – review & editing, 6 Karen Terio, Investigation, Resources, Writing – review & editing, 10 Debbie Duffield, Investigation, Resources, Writing – review & editing, 14 Jim Rice, Investigation, Resources, Writing – review & editing, 15 and Joseph K. Lambourn, Investigation, Resources, Writing – review & editing, 8 Jessie Huggins, Investigation, Resources, Writing – review & editing, 9 Martha A. Bradley Hanson, Investigation, Resources, Writing – review & editing, 3 Dyanna M. Ford, Investigation, Resources, Writing – review & editing, 7 M. Gulland, Conceptualization, Resources, Writing – review & editing, 6 John K. Rotstein, Conceptualization, Formal analysis, Writing – review & editing, 5 Frances M. Noren, Conceptualization, Formal analysis, Investigation, Methodology, Project administration, Visualization, Writing – original draft, Writing – review & editing, 3 Kathy Burek Huntington, Formal analysis, Investigation, Resources, Writing – review & editing, 4 David S. Leger, Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Visualization, Writing – original draft, Writing – review & editing, 2 Dawn P. Stephen Raverty, Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Visualization, Writing – original draft, Writing – review & editing, 1, * Judy St.
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