Trends in Propeller Strike-Induced Mortality in Harbor Seals (Phoca vitulina) of the Salish Sea

Olson, Jennifer K.; Lambourn, Dyanna M.; Huggins, Jessica L.; Raverty, Stephen; Scott, Alyssa; Gaydos, Joseph K.

doi:10.7589/jwd-d-20-00221

Cited by 1 publication

(3 citation statements)

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“…Trauma (nonanthropogenic) also played a significant role in mortalities, as seen previously (Colegrove et al 2005; Ashley et al 2020). Although malnutrition and human interaction were reported in this study, a lesser primary role in mortality was documented than prior reports in other regions, and was described as having more of a contributory role (Colegrove et al 2005; Ashley et al 2020; Olson et al 2021).…”

Section: Discussioncontrasting

confidence: 80%

“…Infection, metabolic derangements, and trauma predominated, though stillbirth/dystocia was not documented in any mortalities as seen in Washington (Huggins et al 2013). Human-associated trauma, a major cause of death of most studies in wild weaned pups, was less prevalent at MMR (Stieger et al 1989;Ashley et al 2020;Olson et al 2021). However, infection continues to play a significant role in weaned pup loss, as seen in other regions (Ashley et al 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Human-associated trauma, a major cause of death of most studies in wild weaned pups, was less prevalent at MMR (Stieger et al 1989; Ashley et al 2020; Olson et al 2021). However, infection continues to play a significant role in weaned pup loss, as seen in other regions (Ashley et al 2020).…”

Section: Discussionmentioning

confidence: 99%

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Causes and Trends of Harbor Seal (Phoca Vitulina) Mortality Along the British Columbia Coast, Canada, 2012–2020

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Haulena

Akhurst

et al. 2023

Journal of Wildlife Diseases

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A retrospective study was conducted to categorize and describe the causes of mortality in harbor seals (Phoca vitulina) along the British Columbia coast that presented to the Vancouver Aquarium Marine Mammal Rescue Centre (MMR) for rehabilitation from 2012 to 2020. Medical records for 1,279 predominantly perinatal live-stranded harbor seals recovered in this region were reviewed. Approximately 20.0% (256 individuals; 137 males, 118 females, 1 unknown) of these animals died while at MMR. Infectious disease was the most common cause of death, accounting for 60.5% of mortality across all age classes. This was followed by nonanthropogenic trauma (7.1%), metabolic illness (5.4%), nutritional deficiency (5.0%), parasitic illness (5.0%), congenital disorders (2.5%), and human-associated trauma (0.4%). Pups were the most common age class (87.4%) amongst mortalities and predominantly died of an infectious process (62.5%). Phocid herpesvirus-1 infection was identified in 18.9% of the mortalities, with the highest prevalence occurring in 2019 (30.8%). Fungal disease was detected in six seals: three cases of pulmonary mycosis due to Cryptococcus gattii and three cases consistent with mucormycosis. In six cases, mortality was attributed to congenital disorders. Two of these cases involved axial skeletal malformities that are not currently described in the literature. This is the first study to describe the causes of mortality in harbor seals undergoing rehabilitation in British Columbia.

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Section: Discussioncontrasting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Causes and Trends of Harbor Seal (Phoca Vitulina) Mortality Along the British Columbia Coast, Canada, 2012–2020

Pace

Haulena

Akhurst

et al. 2023

Journal of Wildlife Diseases

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Trends in Propeller Strike-Induced Mortality in Harbor Seals (Phoca vitulina) of the Salish Sea

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 1 publication

References 11 publications

Causes and Trends of Harbor Seal (Phoca Vitulina) Mortality Along the British Columbia Coast, Canada, 2012–2020

Causes and Trends of Harbor Seal (Phoca Vitulina) Mortality Along the British Columbia Coast, Canada, 2012–2020

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