Concentrations of 137Cs in lynx (Lynx lynx) in relation to prey choice
| Autor: | Knut Hove, Eiliv Steinnes, Tor Kvam, Lavrans Skuterud, Eldar Gaare |
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| Rok vydání: | 2005 |
| Předmět: |
Food Chain
Health Toxicology and Mutagenesis Zoology Predation biology.animal Grazing Animals Environmental Chemistry Carnivore Carnivorous animal Waste Management and Disposal biology Norway Ecology Muscles General Medicine Models Theoretical Pollution Gastrointestinal Contents Roe deer Chernobyl Nuclear Accident Thigh Cesium Radioisotopes Predatory Behavior Deposition density Lynx Linear Models Radioactive Hazard Release Environmental Monitoring Half-Life Reindeer |
| Zdroj: | Journal of Environmental Radioactivity. 80:125-138 |
| ISSN: | 0265-931X |
| Popis: | Concentrations of (137)Cs were determined in 747 lynxes killed in Norway during the period 1986-2001. Highly variable (137)Cs concentrations and aggregated transfer coefficient values were observed, probably caused by variable (137)Cs concentrations in prey and the lynx's extensive home ranges and roaming distances. Adult lynxes had higher (137)Cs concentrations than sub-adults, and lynxes killed in regions with extensive reindeer grazing areas were more contaminated than others. A model with (137)Cs deposition density, the year lynxes were killed, age, and extent of reindeer grazing area accounted for 50% of the variability in observed (137)Cs concentrations. The analyses were equivocal regarding the influence of stomach content on (137)Cs concentrations in lynx muscle, i.e., on the lynx's specialization in prey species. Gender was not significant. Information on caesium retention in lynx and better estimates of deposition densities in lynxes' home ranges are important for further elucidation of factors influencing (137)Cs contamination in lynxes. |
| Databáze: | OpenAIRE |
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