Fish & Wildlife Disease: Marine Mammals
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By Biological Threats and Invasive Species Research Program
September 29, 2022
We are developing advanced tools for disease diagnosis, surveillance, risk assessment and control to support management of wildlife diseases.
Marine Mammal Disease Research
Marine Mammal Disease Research
Explore our science using the data below.
Explore our science using the publications below.
Energetic and health effects of protein overconsumption constrain dietary adaptation in an apex predator Energetic and health effects of protein overconsumption constrain dietary adaptation in an apex predator
Studies of predator feeding ecology commonly focus on energy intake. However, captive predators have been documented to selectively feed to optimize macronutrient intake. As many apex predators experience environmental changes that affect prey availability, limitations on selective feeding can affect energetics and health. We estimated the protein:fat ratio of diets consumed by wild...
Authors
Karyn D. Rode, Charles T. Robbins, Craig A. Stricker, Brian D. Taras, Troy N Tollefson
Sea otter population collapse in southwest Alaska: Assessing ecological covariates, consequences, and causal factors Sea otter population collapse in southwest Alaska: Assessing ecological covariates, consequences, and causal factors
Sea otter (Enhydra lutris) populations in southwest Alaska declined substantially between about 1990 and the most recent set of surveys in 2015. Here we report changes in the distribution and abundance of sea otters, and covarying patterns in reproduction, mortality, body size and condition, diet and foraging behavior, food availability, health profiles, and exposure to environmental...
Authors
M. Tim Tinker, James L. Bodkin, Lizabeth Bowen, Brenda Ballachey, Gena Bentall, Alexander Burdin, Heather Coletti, George G. Esslinger, Brian B. Hatfield, Michael C. Kenner, Kimberly A. Kloecker, Brenda Konar, A. Keith Miles, Daniel Monson, Michael J. Murray, Ben Weitzman, James A. Estes
Exposure to domoic acid is an ecological driver of cardiac disease in southern sea otters Exposure to domoic acid is an ecological driver of cardiac disease in southern sea otters
Harmful algal blooms produce toxins that bioaccumulate in the food web and adversely affect humans, animals, and entire marine ecosystems. Blooms of the diatom Pseudo-nitzschia can produce domoic acid (DA), a toxin that most commonly causes neurological disease in endothermic animals, with cardiovascular effects that were first recognized in southern sea otters. Over the last 20 years...
Authors
Megan E. Moriarty, M. Tim Tinker, Melissa Miller, Joseph A. Tomoleoni, Michelle M. Staedler, Jessica A. Fujii, Francesca I. Batac, Erin M. Dodd, Raphael M. Kudela, Vanessa Zubkousky-White, Christine K. Johnson
Canine distemper virus in the sea otter population (Enhydra lutris) in Washington State, USA Canine distemper virus in the sea otter population (Enhydra lutris) in Washington State, USA
Before 2001, all serosurveys for morbilliviruses in sea otters (Enhydra lutris) in California, Washington, and Alaska, USA, documented a 0% seroprevalence. The first published serologic detections of morbillivirus in sea otters occurred in 2001–02 in live-captured Washington sea otters, with a documented 80% seroprevalence. We conducted a retrospective study of sea otter cases from 1989...
Authors
Nancy Thomas, C. LeAnn White, Jeremiah Saliki, Krysten L. Schuler, Deanna Lynch, Ole Nielsen, J.P. Dubey, Susan Knowles
Emergence of a zoonotic pathogen in a coastal marine sentinel: Capillaria hepatica (syn. Calodium hepaticum)-associated hepatitis in southern sea otters (Enhydra lutris nereis) Emergence of a zoonotic pathogen in a coastal marine sentinel: Capillaria hepatica (syn. Calodium hepaticum)-associated hepatitis in southern sea otters (Enhydra lutris nereis)
Capillaria hepatica is a globally distributed zoonotic nematode parasite that most commonly infects feral and native rats. Soil contact, pica, and living in close proximity to rat populations are risk factors for human infection. Larval nematodes and eggs that were morphologically consistent with C. hepatica were observed microscopically in livers of stranded southern sea otters (Enhydra...
Authors
Melissa A. Miller, Padraig J Duignan, Erin Dodd, Francesca Batac, Michelle M. Staedler, Joseph A. Tomoleoni, Michael J. Murray, Heather Harris, Chris Gardiner
Spatial epidemiological patterns suggest mechanisms of land-sea transmission for Sarcocystis neurona in a coastal marine mammal Spatial epidemiological patterns suggest mechanisms of land-sea transmission for Sarcocystis neurona in a coastal marine mammal
Sarcocystis neurona was recognised as an important cause of mortality in southern sea otters (Enhydra lutris nereis) after an outbreak in April 2004 and has since been detected in many marine mammal species in the Northeast Pacific Ocean. Risk of S. neurona exposure in sea otters is associated with consumption of clams and soft-sediment prey and is temporally associated with runoff...
Authors
Tristan Burgess, M. Tim Tinker, Melissa A. Miller, Woutrina A. Smith, James L. Bodkin, Michael J. Murray, Linda M. Nichol, Justin A. Saarinen, Shawn E. Larson, Joseph A. Tomoleoni, Patricia A. Conrad, Christine K. Johnson
We are developing advanced tools for disease diagnosis, surveillance, risk assessment and control to support management of wildlife diseases.
Marine Mammal Disease Research
Marine Mammal Disease Research
Explore our science using the data below.
Explore our science using the publications below.
Energetic and health effects of protein overconsumption constrain dietary adaptation in an apex predator Energetic and health effects of protein overconsumption constrain dietary adaptation in an apex predator
Studies of predator feeding ecology commonly focus on energy intake. However, captive predators have been documented to selectively feed to optimize macronutrient intake. As many apex predators experience environmental changes that affect prey availability, limitations on selective feeding can affect energetics and health. We estimated the protein:fat ratio of diets consumed by wild...
Authors
Karyn D. Rode, Charles T. Robbins, Craig A. Stricker, Brian D. Taras, Troy N Tollefson
Sea otter population collapse in southwest Alaska: Assessing ecological covariates, consequences, and causal factors Sea otter population collapse in southwest Alaska: Assessing ecological covariates, consequences, and causal factors
Sea otter (Enhydra lutris) populations in southwest Alaska declined substantially between about 1990 and the most recent set of surveys in 2015. Here we report changes in the distribution and abundance of sea otters, and covarying patterns in reproduction, mortality, body size and condition, diet and foraging behavior, food availability, health profiles, and exposure to environmental...
Authors
M. Tim Tinker, James L. Bodkin, Lizabeth Bowen, Brenda Ballachey, Gena Bentall, Alexander Burdin, Heather Coletti, George G. Esslinger, Brian B. Hatfield, Michael C. Kenner, Kimberly A. Kloecker, Brenda Konar, A. Keith Miles, Daniel Monson, Michael J. Murray, Ben Weitzman, James A. Estes
Exposure to domoic acid is an ecological driver of cardiac disease in southern sea otters Exposure to domoic acid is an ecological driver of cardiac disease in southern sea otters
Harmful algal blooms produce toxins that bioaccumulate in the food web and adversely affect humans, animals, and entire marine ecosystems. Blooms of the diatom Pseudo-nitzschia can produce domoic acid (DA), a toxin that most commonly causes neurological disease in endothermic animals, with cardiovascular effects that were first recognized in southern sea otters. Over the last 20 years...
Authors
Megan E. Moriarty, M. Tim Tinker, Melissa Miller, Joseph A. Tomoleoni, Michelle M. Staedler, Jessica A. Fujii, Francesca I. Batac, Erin M. Dodd, Raphael M. Kudela, Vanessa Zubkousky-White, Christine K. Johnson
Canine distemper virus in the sea otter population (Enhydra lutris) in Washington State, USA Canine distemper virus in the sea otter population (Enhydra lutris) in Washington State, USA
Before 2001, all serosurveys for morbilliviruses in sea otters (Enhydra lutris) in California, Washington, and Alaska, USA, documented a 0% seroprevalence. The first published serologic detections of morbillivirus in sea otters occurred in 2001–02 in live-captured Washington sea otters, with a documented 80% seroprevalence. We conducted a retrospective study of sea otter cases from 1989...
Authors
Nancy Thomas, C. LeAnn White, Jeremiah Saliki, Krysten L. Schuler, Deanna Lynch, Ole Nielsen, J.P. Dubey, Susan Knowles
Emergence of a zoonotic pathogen in a coastal marine sentinel: Capillaria hepatica (syn. Calodium hepaticum)-associated hepatitis in southern sea otters (Enhydra lutris nereis) Emergence of a zoonotic pathogen in a coastal marine sentinel: Capillaria hepatica (syn. Calodium hepaticum)-associated hepatitis in southern sea otters (Enhydra lutris nereis)
Capillaria hepatica is a globally distributed zoonotic nematode parasite that most commonly infects feral and native rats. Soil contact, pica, and living in close proximity to rat populations are risk factors for human infection. Larval nematodes and eggs that were morphologically consistent with C. hepatica were observed microscopically in livers of stranded southern sea otters (Enhydra...
Authors
Melissa A. Miller, Padraig J Duignan, Erin Dodd, Francesca Batac, Michelle M. Staedler, Joseph A. Tomoleoni, Michael J. Murray, Heather Harris, Chris Gardiner
Spatial epidemiological patterns suggest mechanisms of land-sea transmission for Sarcocystis neurona in a coastal marine mammal Spatial epidemiological patterns suggest mechanisms of land-sea transmission for Sarcocystis neurona in a coastal marine mammal
Sarcocystis neurona was recognised as an important cause of mortality in southern sea otters (Enhydra lutris nereis) after an outbreak in April 2004 and has since been detected in many marine mammal species in the Northeast Pacific Ocean. Risk of S. neurona exposure in sea otters is associated with consumption of clams and soft-sediment prey and is temporally associated with runoff...
Authors
Tristan Burgess, M. Tim Tinker, Melissa A. Miller, Woutrina A. Smith, James L. Bodkin, Michael J. Murray, Linda M. Nichol, Justin A. Saarinen, Shawn E. Larson, Joseph A. Tomoleoni, Patricia A. Conrad, Christine K. Johnson