Mercury in Hair of Bobcats and Raccoons

Cumbie, Peter M.

doi:10.2307/3799923

Cited by 21 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We also collected red‐winged blackbird ( Agelaius phoeniceus ), Brewer's blackbird ( Euphagus cyanocephalus ), and cliff swallow ( Hirundo pyrrhonota ) nestlings, to learn whether these insectivorous birds were exposed to Hg and MeHg at lower concentrations and to see if an effect of distance from the mine was evident at this lower trophic level. Effects of Hg on raccoons, otters, and mink have been reported in numerous studies [37–48], and are summarized in Wolfe et al [49]. These studies provide a basis for comparison and interpretation of the tissue Hg residues in animals we sampled at Clear Lake.…”

Section: Introductionmentioning

confidence: 83%

Effects of waterborne mercury on terrestrial wildlife at clear lake: Evaluation and testing of a predictive model

Wolfe¹,

Norman²

1998

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Birds and mammals exposed to waterborne mercury (Hg) and methylmercury (MeHg) were collected and/or sampled at Clear Lake, California, USA, to field test the predictive wildlife criteria model developed for the Great Lakes Water Quality Initiative (GLWQI). Tissue samples collected from sampled animals were analyzed for Hg and organochlorine residues, and for selected physiologic parameters known to be affected by Hg. All mammalian organ tissues analyzed contained less than 12 ppm total Hg, wet weight. All avian tissue samples analyzed contained less than 3 ppm total Hg, wet weight. No evidence of Hg‐associated health effects was found. Tissue Hg residues were compared with water, sediment, and animal food samples to characterize bioaccumulation of mercury in the Clear Lake food web. Total Hg bioaccumulation factors for the Clear Lake site closest to the Hg source were: TL‐2: 11,100; TL‐3: 31,200; TL‐4, 190,000. Our results support the final wildlife criterion (1,300 pg/L) and suggest that the GLWQI model, with site‐specific modifications, is predictive for other Hg‐bearing aquatic systems.

show abstract

Section: Introductionmentioning

confidence: 83%

Effects of waterborne mercury on terrestrial wildlife at clear lake: Evaluation and testing of a predictive model

Wolfe¹,

Norman²

1998

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

show abstract

“…Moreover, changes in trace elements in skin formations may reflect age-related changes in metabolic profiles across the life span and thus, may also be used to predict risk of age-related chronic diseases (Ambeskovic et al 2013). Some researchers have found that hair THg levels are correlated with THg concentrations in the kidney and liver (Cumbie 1975;Halbrook et al 1994); however, reports also exist to the contrary (Lord et al 2002). Many studies have focused on measuring Hg concentration in the hair of piscivorous mammals such as the mink and otter (Table 3).…”

Section: Discussionmentioning

confidence: 99%

Selenium and mercury in the hair of raccoons (Procyon lotor) and European wildcats (Felis s. silvestris) from Germany and Luxembourg

et al. 2019

View full text Add to dashboard Cite

This study examined the concentration of total mercury (THg) and selenium (Se), as well as the molar ratio of Se:THg in hair samples of terrestrial animals. THg and Se concentrations were measured from the hair of raccoons (Procyon lotor) and European wildcats (Felis s. silvestris) from Germany and Luxembourg. Median THg concentrations in hair from raccoons and wildcats were 0.369 and 0.273 mg kg −1 dry weight (dw), respectively. Se concentrations were higher in the hair of raccoons than of wildcats (0.851 and 0.641 mg kg −1 dw, respectively). Total mercury concentration in hair of raccoons from Luxembourg was almost 5× higher that found in hair of raccoons from Germany; however, Se concentration was similar. Thus, molar ratio of Se:THg was~4× higher in the hair of raccoons from Germany than those from Luxembourg. Significant negative correlation was found between THg concentration and Se:THg molar ratio in both wildcats and raccoons.

show abstract

“…Hair or fur samples may either be unwashed [116], or washed with acetone to reduce the fat content [117]. Some investigators have found that washing is not effective in removing naturally occurring Hg from exogenous deposition [118,119] The digestive process may include submersion of hair or fur in a mixture of concentrated acid extractive solvents such as nitric and sulfuric acid or acetonitrile-water and sodium pyrrolidinedithiocarbamate. After a period of time the prepared extracted solvent can be used in Hg analysis.…”

Section: Sample Preparationmentioning

confidence: 99%

Effects of Mercury on Wildlife: A Comprehensive Review

Wolfe

Schwarzbach

Sulaiman³

1998

Environ Toxicol Chem

105

View full text Add to dashboard Cite

Wildlife may be exposed to mercury (Hg) and methylmercury (MeHg) from a variety of environmental sources, including mine tailings, industrial effluent, agricultural drainwater, impoundments, and atmospheric deposition from electric power generation. Terrestrial and aquatic wildlife may be at risk from exposure to waterborne Hg and MeHg. The transformation of inorganic Hg by anaerobic sediment microorganisms in the water column produces MeHg, which bioaccumulates at successive trophic levels in the food chain. If high trophic level feeders, such as piscivorous birds and mammals, ingest sufficient MeHg in prey and drinking water, Hg toxicoses, including damage to nervous, excretory and reproductive systems, result. Currently accepted no observed adverse effect levels (NOAELs) for waterborne Hg in wildlife have been developed from the piscivorous model in which most dietary Hg is in the methyl form. Such model are not applicable to omnivores, insectivores, and other potentially affected groups, and have not incorpotated data from other important matrices, such as eggs and muscle. The purpose of this paper is to present a comprehensive review of the Hg literature as it relates to effects on wildlife, including previously understudied groups. We present a critique of the current state of knowledge about effects of Hg on wildlife as an aid to identifying missing information and to planning research needed for conducting a complete assessment of Hg risks to wildlife. This review summarizes the toxicity of Hg to birds and mammals, the mechanisms of Hg toxicity, the measurement of Hg in biota, and interpretation of residue data.

show abstract

Mercury in Hair of Bobcats and Raccoons

Cited by 21 publications

References 7 publications

Effects of waterborne mercury on terrestrial wildlife at clear lake: Evaluation and testing of a predictive model

Effects of waterborne mercury on terrestrial wildlife at clear lake: Evaluation and testing of a predictive model

Selenium and mercury in the hair of raccoons (Procyon lotor) and European wildcats (Felis s. silvestris) from Germany and Luxembourg

Effects of Mercury on Wildlife: A Comprehensive Review

Contact Info

Product

Resources

About