猞猁（欧亚猞猁）体内137铯的浓度与猎物选择的关系。

Concentrations of 137Cs in lynx (Lynx lynx) in relation to prey choice.

作者信息

Skuterud Lavrans, Gaare Eldar, Kvam Tor, Hove Knut, Steinnes Eiliv

机构信息

Norwegian Radiation Protection Authority, PO Box 55, NO-1332 Østerås, Norway.

出版信息

J Environ Radioact. 2005;80(1):125-38. doi: 10.1016/j.jenvrad.2004.09.002.

DOI:10.1016/j.jenvrad.2004.09.002

PMID:15653191

Abstract

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.

摘要

1986年至2001年期间，对在挪威捕杀的747只猞猁体内的铯-137浓度进行了测定。观察到铯-137浓度和累积转移系数值变化很大，这可能是由于猎物中铯-137浓度不同以及猞猁广泛的活动范围和活动距离所致。成年猞猁的铯-137浓度高于亚成年猞猁，在驯鹿放牧区域广泛的地区捕杀的猞猁比其他地区的猞猁受污染更严重。一个包含铯-137沉积密度、猞猁被捕杀年份、年龄和驯鹿放牧区域范围的模型，解释了所观察到的铯-137浓度变化的50%。关于胃内容物对猞猁肌肉中铯-137浓度的影响，即猞猁在猎物种类上的专一性，分析结果并不明确。性别因素不显著。了解猞猁体内铯的留存情况以及更准确地估计猞猁活动范围内的沉积密度，对于进一步阐明影响猞猁铯-137污染的因素很重要。