scholarly journals California sea otter (Enhydra lutris nereis) census results, spring 2018

Data Series ◽  
2018 ◽  
Author(s):  
Brian B. Hatfield ◽  
Julie L. Yee ◽  
Michael C. Kenner ◽  
Joseph A. Tomoleoni ◽  
M. Tim Tinker
Keyword(s):  
Sea Otter ◽  
Enhydra Lutris ◽  
Enhydra Lutris Nereis

scholarly journals Predators, Disease, and Environmental Change in the Nearshore Ecosystem: Mortality in Southern Sea Otters (Enhydra lutris nereis) From 1998–2012

2020 ◽  
Vol 7 ◽  
Author(s):  
Melissa A. Miller ◽  
Megan E. Moriarty ◽  
Laird Henkel ◽  
Martin Tim Tinker ◽  
Tristan L. Burgess ◽  
...  
Keyword(s):  
Bacterial Infections ◽  
Population Level ◽  
Large Sample Size ◽  
Sea Otter ◽  
Enhydra Lutris ◽  
Sea Otters ◽  
Sarcocystis Neurona ◽  
Enhydra Lutris Nereis ◽  
Protozoal Infection ◽  
Demographic Attributes

We compiled findings from 15 years (1998–2012) of southern sea otter (Enhydra lutris nereis) necropsies, incorporating data from 560 animals. Sensitive diagnostic tests were used to detect biotoxins, bacteria, parasites and fungi. Methods to classify primary and contributing causes of death (COD) and sequelae utilized an updated understanding of health risks affecting this population. Several interesting patterns emerged, including identification of coastal regions of high mortality risk for sea otter mortality due to shark bite, cardiomyopathy, toxoplasmosis, sarcocystosis, acanthocephalan peritonitis and coccidioidomycosis. We identified demographic attributes that enhanced the risk of disease in relation to age, sex, and reproductive stage. Death due to white shark (Carcharodon carcharias) bite increased dramatically during the study period and was the most common primary COD. However, when primary and contributing COD were combined, the most prevalent COD was infectious disease (affecting 63% of otters), especially fatal infections by acanthocephalans (Profilicollis spp.) and protozoa (e.g., Sarcocystis neurona and Toxoplasma gondii). Fatal bacterial infections were also extremely common as a primary process or a sequela, affecting 68% of examined otters. Substantial advances were made in identifying sea otters that died following exposure to the pervasive marine neurotoxin domoic acid (DA), and DA intoxication was conservatively estimated as a primary or contributing COD for 20% of otters. Cardiomyopathy was also highly prevalent as a primary or contributing COD (41%) and exhibited significant associations with DA intoxication and protozoal infection. For adult and aged adult females in late pup care through post-weaning at the time of death, 83% had end lactation syndrome (ELS) as a primary or contributing COD. This comprehensive longitudinal dataset is unique in its depth and scope. The large sample size and extensive time period provided an opportunity to investigate mortality patterns in a changing environment and identify spatial and temporal disease “hot spots” and emerging threats. Our findings will help improve estimates of population-level impacts of specific threats and optimize conservation and environmental mitigation efforts for this threatened species.

Biological characterisation of Sarcocystis neurona isolated from a Southern sea otter (Enhydra lutris nereis)

2000 ◽  
Vol 30 (5) ◽  
pp. 617-624 ◽  
Author(s):  
D.S. Lindsay ◽  
N.J. Thomas ◽  
J.P. Dubey
Keyword(s):  
Sea Otter ◽  
Enhydra Lutris ◽  
Sarcocystis Neurona ◽  
Enhydra Lutris Nereis ◽  
Southern Sea Otter

The development of methods for immunophenotypic and lymphocyte function analyzes for assessment of Southern sea otter (Enhydra lutris nereis) health

2005 ◽  
Vol 104 (1-2) ◽  
pp. 1-14 ◽  
Author(s):  
Julie Schwartz ◽  
Brian Aldridge ◽  
Myra Blanchard ◽  
F.Charles Mohr ◽  
Jeffrey Stott
Keyword(s):  
Sea Otter ◽  
Lymphocyte Function ◽  
Enhydra Lutris ◽  
Enhydra Lutris Nereis ◽  
Southern Sea Otter

scholarly journals California sea otter (Enhydra lutris nereis) census results, Spring 2017

Data Series ◽  
2017 ◽  
Author(s):  
M. Tim Tinker ◽  
Brian B. Hatfield
Keyword(s):  
Sea Otter ◽  
Enhydra Lutris ◽  
Enhydra Lutris Nereis

scholarly journals California sea otter (Enhydra lutris nereis) census results, Spring 2016

Data Series ◽  
2016 ◽  
Author(s):  
M. Tim Tinker ◽  
Brian B. Hatfield
Keyword(s):  
Sea Otter ◽  
Enhydra Lutris ◽  
Enhydra Lutris Nereis

Aerial hearing sensitivity in a southern sea otter (Enhydra lutris nereis)

2012 ◽  
Vol 132 (3) ◽  
pp. 2008-2008
Author(s):  
Asila Ghoul ◽  
Colleen Reichmuth
Keyword(s):  
Sea Otter ◽  
Enhydra Lutris ◽  
Hearing Sensitivity ◽  
Enhydra Lutris Nereis ◽  
Southern Sea Otter

Primary intracranial fibrosarcoma in a southern sea otter Enhydra lutris nereis

2020 ◽  
Vol 138 ◽  
pp. 207-213
Author(s):  
AR Armwood ◽  
CE Anderson ◽  
T Clauss ◽  
AC Camus
Keyword(s):  
Smooth Muscle Actin ◽  
Brain Lesion ◽  
Acute Onset ◽  
Sea Otter ◽  
Enhydra Lutris ◽  
Mammal Species ◽  
Sea Otters ◽  
Enhydra Lutris Nereis ◽  
High Mitotic Count ◽  
Southern Sea Otter

Southern sea otters Enhydra lutris nereis, a threatened marine mammal species, face numerous environmental and infectious disease challenges in their native habitat of coastal California, USA. However, there are few published cases describing neoplasia in sea otters despite their relatively long life span when cared for in aquarium settings. An 18 yr old neutered male southern sea otter, born and raised in human care, presented with an acute onset of seizures and dull mentation. Magnetic resonance imaging of the head revealed a large, central brain lesion. After no improvement with treatment, euthanasia was elected due to a poor prognosis. Grossly, a poorly demarcated, granular, tan mass expanded the cranial meninges in the longitudinal fissure at the level of the cruciate sulcus and extended into the underlying gray matter and superficial white matter. Histologically, the mass was composed of spindle cells, forming haphazardly arranged interlacing bundles and herringbone patterns, with a high mitotic count, moderate cellular pleomorphism, and prominent vascularization. Neoplastic cells demonstrated positive immunoreactivity for vimentin and negative immunoreactivity for smooth muscle actin, factor VIII-related antigen, S100, melan-A, E-cadherin, desmin, glial fibrillary acidic protein, and cytokeratin AE1/AE3. Based on gross, histologic, and immunohistochemical findings, the mass was most consistent with a primary intracranial fibrosarcoma (PIF). PIFs are a rare neoplasm in both humans and other animals with few reports in the veterinary literature. This is the first recorded case of a PIF in a sea otter.

MODIFIED-CLOSED CASTRATION: A NOVEL TECHNIQUE FOR SEA OTTER (ENHYDRA LUTRIS NEREIS) ORCHIECTOMIES

2013 ◽  
Vol 44 (3) ◽  
pp. 786-789 ◽  
Author(s):  
Alexa J. McDermott ◽  
Tonya Clauss ◽  
Sherisse Sakals ◽  
Johanna Mejia-Fava ◽  
MaryAnn G. Radlinsky
Keyword(s):  
Sea Otter ◽  
Enhydra Lutris ◽  
Enhydra Lutris Nereis ◽  
Novel Technique

Isolation and characterization of Sarcocystis from brain tissue of a free-living southern sea otter ( Enhydra lutris nereis ) with fatal meningoencephalitis

2001 ◽  
Vol 87 (3) ◽  
pp. 252-257 ◽  
Author(s):  
Melissa A. Miller ◽  
Paul R. Crosbie ◽  
Karen Sverlow ◽  
Krista Hanni ◽  
Bradd C. Barr ◽  
...  
Keyword(s):  
Brain Tissue ◽  
Sea Otter ◽  
Enhydra Lutris ◽  
Free Living ◽  
Enhydra Lutris Nereis ◽  
Isolation And Characterization ◽  
Southern Sea Otter
Sign in / Sign up

Export Citation Format

Share Document