Temporal Changes in Concentrations of Lead and Other Trace Metals in Free-Ranging Eurasian Eagle Owls Bubo bubo in Sweden.

Temporal Changes in Concentrations of Lead and Other Trace Metals in Free-Ranging Eurasian Eagle Owls Bubo bubo in Sweden. Arch Environ Contam Toxicol. 2019 Jul 16;: Authors: Helander B, Sundbom M, Runkel AA, Bignert A Abstract Patterns of lead and other trace metals were examined in 122 Eurasian eagle owls Bubo bubo found dead in Sweden in the period 1978-2013. Environmental lead (Pb) has decreased over recent decades from reduced anthropogenic emissions but mortality by Pb poisoning is still frequently reported for avian raptors and scavengers exposed to Pb ammunition. One objective here was to determine if Pb concentrations in a nocturnal non-scavenging raptor follow the general decline observed in other biota. Pb concentration in owl liver was significantly correlated with body weight, sex, latitude, longitude and season. Pb showed a significant decreasing trend towards north and west. Starved birds had significantly higher concentrations. Total Pb concentrations in liver averaged 0.179 μg g-1 dry weight (median 0.103) and decreased by 5.6% per year 1978-2013, or 5.3% after adjustment for confounding factors, similar to trends in other species. Among 14 other trace elements only antimony and arsenic showed decreasing trends. Lead isotope ratios 206Pb/207Pb and 208Pb/207Pb increased from 1.138 and 2.408 in 1978-1985 to 1.170 and 2.435 in 2010-2013, respectively, demonstrating that the decreasing Pb concentration in eagle owl is related to...
Source: Archives of Environmental Contamination and Toxicology - Category: Environmental Health Authors: Tags: Arch Environ Contam Toxicol Source Type: research

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Publication date: Available online 19 October 2019Source: Comparative Biochemistry and Physiology Part C: Toxicology &PharmacologyAuthor(s): Shouta M.M. Nakayama, Ayuko Morita, Yoshinori Ikenaka, Yusuke K. Kawai, Kensuke P. Watanabe, Chihiro Ishii, Hazuki Mizukawa, Yared B. Yohannes, Keisuke Saito, Yukiko Watanabe, Masaki Ito, Natsuo Ohsawa, Mayumi IshizukaAbstractWorldwide use of anticoagulant rodenticides (ARs) for rodents control has frequently led to secondary poisoning of non-target animals, especially raptors. In order to suggest some factors that may help considering the mechanism of the incidents, this study fo...
Source: Comparative Biochemistry and Physiology Part C: Toxicology and Pharmacology - Category: Toxicology Source Type: research
Abstract Worldwide use of anticoagulant rodenticides (ARs) for rodents control has frequently led to secondary poisoning of non-target animals, especially raptors. In order to suggest some factors that may help considering the mechanism of the incidents, this study focused on the avian vitamin K 2, 3-epoxide reductase (VKOR) that is the target protein of ARs. We addressed the interspecific differences in VKOR activity and inhibition related to amino acid sequence and mRNA expression of VKORC1 and VKORC1-like1 (VKORC1L1). Poultry have been considered to be more tolerant to ARs than mammals. However, VKOR activity o...
Source: Comparative biochemistry and physiology. Toxicology and pharmacology : CBP - Category: Biochemistry Authors: Tags: Comp Biochem Physiol C Toxicol Pharmacol Source Type: research
We examined 9293 individuals from the Copenhagen General Population Study using nuclear magnetic resonance spectroscopy measurements of total cholesterol, free- and esterified cholesterol, triglycerides, phospholipids, and particle concentration. Fourteen subclasses of decreasing size and their lipid constituents were analysed: six subclasses were very low-density lipoprotein (VLDL), one intermediate-density lipoprotein (IDL), three low-density lipoprotein (LDL), and four subclasses were high-density lipoprotein (HDL). Remnant lipoproteins were VLDL and IDL combined. Mean nonfasting cholesterol concentration was 72...
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This study aims at characterizing the trichloronate enantiomers hydrolysis by serum and albumin from chicken (CSA) and turkey (TSA) in the presence of copper by chiral chromatography. A significant Cu2+-dependent hydrolysis for both trichloronate enantiomers (38%) was observed in turkey serum and TSA (p 
Source: Chemico Biological Interactions - Category: Biochemistry Source Type: research
This study aims at characterizing the trichloronate enantiomers hydrolysis by serum and albumin from chicken (CSA) and turkey (TSA) in the presence of copper by chiral chromatography. A significant Cu2+-dependent hydrolysis for both trichloronate enantiomers (38%) was observed in turkey serum and TSA (p 
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Source: African Journal of Microbiology Research - Category: Microbiology Source Type: research
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