Mass Mortality of Male Subantarctic Fur Seals Linked to Invasive Mice
Author Information
Author(s): de Bruyn P. J. Nico, Bastos Armanda D. S., Eadie Candice, Tosh Cheryl A., Bester Marthán N.
Primary Institution: Mammal Research Institute, Department of Zoology & Entomology, University of Pretoria, Pretoria, South Africa
Hypothesis
Are alien mice the culprits behind the mass mortality of adult male Subantarctic fur seals?
Conclusion
The study suggests that invasive mice may pose a disease risk to native species, including Subantarctic fur seals, through the transmission of a novel Streptococcus species.
Supporting Evidence
- The mass mortality event was observed in adult male Subantarctic fur seals.
- A novel Streptococcus species was identified in mouse kidneys with a prevalence of 30%.
- No dead adult females or atypical pup mortality was noted during the study period.
Takeaway
The study found that many male seals died, and it might be because of a disease from mice that live on the island.
Methodology
Molecular screening of mouse kidneys for pathogens and bacterial identification through PCR.
Limitations
The absence of seal samples from the adult males that died makes the hypothesis about mice being the source of the infectious agent tenuous.
Participant Demographics
Subantarctic fur seals, specifically adult males.
Digital Object Identifier (DOI)
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