Towards a better understanding of the effects of UV on Atlantic walruses, Odobenus rosmarus rosmarus: A study combining histological data with local ecological knowledge
PLoS ONE, ISSN: 1932-6203, Vol: 11, Issue: 4, Page: e0152122
2016
- 15Citations
- 60Captures
- 1Mentions
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Metrics Details
- Citations15
- Citation Indexes13
- 13
- CrossRef10
- Policy Citations2
- 2
- Captures60
- Readers60
- 60
- Mentions1
- News Mentions1
- 1
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Article Description
Walruses, Odobenus rosmarus, play a key role in the Arctic ecosystem, including northern Indigenous communities, which are reliant upon walruses for aspects of their diet and culture. However, walruses face varied environmental threats including rising sea-water temperatures and decreasing ice cover. An underappreciated threat may be the large amount of solar ultraviolet radiation (UV) that continues to reach the Arctic as a result of ozone loss. UV has been shown to negatively affect whales. Like whales, walrus skin is unprotected by fur, but in contrast, walruses spend long periods of time hauled-out on land. In this study, we combined the results of histological analyses of skin sections from five Atlantic walruses, Odobenus rosmarus rosmarus, collected in Nunavik (Northern Quebec, Canada) with qualitative data obtained through the interviews of 33 local walrus hunters and Inuit Elders. Histological analyses allowed us to explore UV-induced cellular lesions and interviews with experienced walrus hunters and Elders helped us to study the incidences and temporal changes of UV-induced gross lesions in walruses. At the microscopic scale, we detected a range of skin abnormalities consistent with UV damage. However, currently such UV effects do not seem to be widely observed at the whole-animal level (i.e., absence of skin blistering, erythema, eye cataract) by individuals interviewed. Although walruses may experience skin damage under normal everyday UV exposure, the long-term data from local walrus hunters and Inuit Elders did not report a relation between the increased sun radiation secondary to ozone loss and walrus health.
Bibliographic Details
10.1371/journal.pone.0152122; 10.1371/journal.pone.0152122.g002; 10.1371/journal.pone.0152122.g004; 10.1371/journal.pone.0152122.g003; 10.1371/journal.pone.0152122.g001
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