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Mortality trends in northern sea otters (Enhydra lutris kenyoni) collected from the coasts of Washington and Oregon (2002–15)

Journal of Wildlife Diseases

By:
ORCID iD , ORCID iD , , ORCID iD , , , ORCID iD , ORCID iD , and ORCID iD
https://doi.org/10.7589/2017-05-122

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Abstract

During 2002−15 we examined the causes of mortality in a population of northern sea otters (Enhydra lutris kenyoni). Beachcast sea otters were collected primarily from the coast of Washington. Although there are no permanent sea otter residents in Oregon, several beachcast otters were collected from the Oregon coast. Infectious diseases were the primary cause of death (56%) for otters we examined. Sarcocystosis was the leading infectious cause of death (54%) and was observed throughout the study period. Some infectious diseases, such as morbilliviral encephalitis and leptospirosis, were documented for a limited number of years and then not detected again despite continued testing for these pathogens in necropsied animals. Trauma was the second most common cause of death (14%) during the study period. The continued stable growth of the Washington population of otters suggests they are able to tolerate current mortality rates.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mortality trends in northern sea otters (Enhydra lutris kenyoni) collected from the coasts of Washington and Oregon (2002–15)
Series title:
Journal of Wildlife Diseases
DOI:
10.7589/2017-05-122
Edition:
Online First
Year Published:
2018
Language:
English
Publisher:
Wildlife Disease Association
Contributing office(s):
National Wildlife Health Center
Country:
United States
State:
Oregon, Washington