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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10699284 | PMC |
| http://dx.doi.org/10.1503/cjs.98868 | DOI Listing |
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Using Otoliths to Understand Historic and Contemporary Selenium Exposure in Kokanee Salmon (Oncorhynchus nerka) in Kluane National Park and Reserve, Yukon Territory.
Environ Pollut
January 2025
Wilfrid Laurier University, 75 University Ave W, Waterloo N2L 3C5, Canada. Electronic address:
The Kokanee salmon population in Kluane National Park and Reserve (Yukon Territory) declined significantly between 2002 and 2012. Elevated levels of selenium (Se), which can affect fish reproduction, were recently measured in waters used by spawning Kokanee. To investigate whether Se may be contributing to long-term population declines, and in the absence of long-term data on aqueous Se concentrations, Se concentrations in sagittal otoliths - fish ear-bones that chronicle lifetime exposure - were measured and compared in Kokanee sampled in 1981 (a year with many spawners) and 2019-2021.
View Article and Find Full Text PDFPrognostic models for depression and post-traumatic stress disorder symptoms following traumatic brain injury: a CENTER-TBI study.
BMJ Ment Health
January 2025
Department of Biomedical Data Sciences, Leiden University Medical Centre, Leiden, The Netherlands.
Background: Traumatic brain injury (TBI) is associated with an increased risk of major depressive disorder (MDD) and post-traumatic stress disorder (PTSD). We aimed to identify predictors and develop models for the prediction of depression and PTSD symptoms at 6 months post-TBI.
Methods: We analysed data from the Collaborative European NeuroTrauma Effectiveness Research in Traumatic Brain Injury study.
An Estimate of Wolverine Density for the Canadian Province of Alberta.
Ecol Evol
January 2025
Government of Alberta, Forestry and Parks Canmore Alberta Canada.
Article Synopsis
- Wolverines have faced significant range reduction globally, with complete extirpation from eastern Canada and some western prairie regions.
- In Alberta, where they are designated for conservation, researchers aimed to estimate wolverine abundance using existing density data and habitat relationships.
- Results indicated approximately 955 wolverines in the province, with only 544 classified as adults, suggesting a need for a reassessment of their conservation status and related protective measures.
Studying Chinook salmon in northern river ecosystems through ecological methods and Indigenous, Teslin Tlingit knowledge.
Commun Biol
December 2024
Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, AB, Canada.
Article Synopsis
- The study explored the decline of Pacific salmon and its impact on ecosystems using both Western scientific methods and Indigenous Teslin Tlingit knowledge.
- Relationships between riparian tree growth and salmon presence were found, highlighting that tree growth benefited from salmon escapement, particularly at salmon-bearing sites.
- Interviews with local Teslin Tlingit community members indicated that salmon population declines negatively affect local wildlife and human wellbeing, reinforcing the connection between healthy salmon populations and overall ecosystem health.
Examining socio-economic disparities among e-cigarette users and cigarette smokers in three Canadian jurisdictions.
Drug Alcohol Rev
December 2024
Department of Community Health and Epidemiology, Dalhousie University, Halifax, Canada.
Introduction: It is well established that a gradient exists among cigarette smokers, such that smoking is more prevalent among individuals who are of lower socio-economic status (SES). In this study, we examined whether a similar SES gradient exists among electronic cigarette (e-cigarette) using youth and adults in three Canadian jurisdictions.
Methods: A secondary analysis of data from Ontario, Quebec and Yukon respondents (n = 58,592) to the 2017-2018 Canadian Community Health Survey was conducted.
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