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Long-term impacts of the Exxon Valdez oil spill on sea otters, assessed through age-dependent mortality patterns.

https://arctichealth.org/en/permalink/ahliterature6763
Source
Proc Natl Acad Sci U S A. 2000 Jun 6;97(12):6562-7
Publication Type
Article
Date
Jun-6-2000
Author
D H Monson
D F Doak
B E Ballachey
A. Johnson
J L Bodkin
Author Affiliation
United States Geological Survey, Alaska Biological Science Center, 1011 East Tudor Road, Anchorage, AK 99503, USA. daniel_monson@usgs.gov
Source
Proc Natl Acad Sci U S A. 2000 Jun 6;97(12):6562-7
Date
Jun-6-2000
Language
English
Publication Type
Article
Keywords
Accidents
Age Factors
Alaska
Animals
Environmental pollution
Mortality
Otters - physiology
Petroleum
Population Surveillance
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Time Factors
Abstract
We use age distributions of sea otters (Enhydra lutris) found dead on beaches of western Prince William Sound, Alaska, between 1976 and 1998 in conjunction with time-varying demographic models to test for lingering effects from the 1989 Exxon Valdez oil spill. Our results show that sea otters in this area had decreased survival rates in the years following the spill and that the effects of the spill on annual survival increased rather than dissipated for older animals. Otters born after the 1989 spill were affected less than those alive in March 1989, but do show continuing negative effects through 1998. Population-wide effects of the spill appear to have slowly dissipated through time, due largely to the loss of cohorts alive during the spill. Our results demonstrate that the difficult-to-detect long-term impacts of environmental disasters may still be highly significant and can be rigorously analyzed by using a combination of population data, modeling techniques, and statistical analyses.
PubMed ID
10823920 View in PubMed
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Studies on the helminth fauna of Alaska. XVII. Notes on the intermediate stages of some helminth parasites of the sea otter

https://arctichealth.org/en/permalink/ahliterature99647
Source
Biological Bulletin. 1954 Feb;106(1):107-121
Publication Type
Article
Date
Feb-1954
  1 website  
Author
Schiller, EL
Author Affiliation
Arctic Health Research Center
Source
Biological Bulletin. 1954 Feb;106(1):107-121
Date
Feb-1954
Language
English
Geographic Location
U.S.
Publication Type
Article
Keywords
Aleutian Island
Amchitka
Enhydra lutris
Excysted larvae
Greenling
Helminth parasites
Marine invertebrates
Microphallus pirum
Mortality
Nematode infections
Porrocaecum decipiens
Sculpin
Sea otters
Trematode metacercariae
Abstract
According to the work of Rausch (1953) , two species of helminth parasites, Porrocaecum decipiens (Krabbe, 1878) and Microphallus pirum (Afanas'ev, 1941), are pathogenic for the sea otter, Enhydra lutris (L.) , on the Aleutian Island of Amchitka. In continuation of investigations of sea otter mortality on Amchitka during the latter part of May and early June, 1952, the writer made an attempt to obtain information on the life cycles and developmental characteristics of these parasites. It is the purpose of this paper to report the results of these observations.
Online Resources
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