Title |
Mercury in gray wolves (Canis lupus) in Alaska: Increased exposure through consumption of marine prey
|
---|---|
Published in |
Science of the Total Environment, September 2013
|
DOI | 10.1016/j.scitotenv.2013.08.045 |
Pubmed ID | |
Authors |
Ashley K. McGrew, Lora R. Ballweber, Sara K. Moses, Craig A. Stricker, Kimberlee B. Beckmen, Mo D. Salman, Todd M. O'Hara |
Abstract |
Mercury (Hg) bioaccumulates in the tissues of organisms and biomagnifies within food-webs. Gray wolves (Canis lupus) in Alaska primarily acquire Hg through diet; therefore, comparing the extent of Hg exposure in wolves, in conjunction with stable isotopes, from interior and coastal regions of Alaska offers important insight into their feeding ecology. Liver, kidney, and skeletal muscle samples from 162 gray wolves were analyzed for total mercury (THg) concentrations and stable isotopic signatures (δ(13)C, δ(15)N, and δ(34)S). Median hepatic THg concentrations were significantly higher in wolves with coastal access compared to wolves from interior Alaska. Stable isotope ratios, in conjunction with THg concentrations, provide strong evidence that coastal wolves are utilizing marine prey representing several trophic levels. The utilization of cross-ecosystem food resources by coastal wolves is clearly contributing to increased THg exposure, and may ultimately have negative health implications for these animals. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Spain | 3 | 50% |
Unknown | 3 | 50% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 6 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Mexico | 2 | 3% |
Czechia | 1 | 2% |
Unknown | 55 | 95% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 13 | 22% |
Student > Master | 12 | 21% |
Student > Ph. D. Student | 10 | 17% |
Student > Doctoral Student | 4 | 7% |
Student > Bachelor | 4 | 7% |
Other | 8 | 14% |
Unknown | 7 | 12% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 33 | 57% |
Environmental Science | 9 | 16% |
Veterinary Science and Veterinary Medicine | 3 | 5% |
Pharmacology, Toxicology and Pharmaceutical Science | 1 | 2% |
Arts and Humanities | 1 | 2% |
Other | 2 | 3% |
Unknown | 9 | 16% |