The Tail Feathers of Osprey Nestlings (Pandion haliaetus L.) as Indicators of Change in Mercury Load in the Environment of Southern Sweden (1969–1998): Case Study with a Note on the Simultaneous Intake of Selenium

Odsjö, Tjelvar; Roos, Anna Marie; Johnels, Alf G.

doi:10.1639/0044-7447(2004)033[0133:ttfoon]2.0.co;2

Cited by 5 publications

(6 citation statements)

References 29 publications

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“…Bowerman et al (1994) considered HgF in Bald Eagles of the Great Lakes (geometric mean 5 21.1 ppm, range: 3.6-48) as merely ''elevated.' ' Odsjö et al (2004) found geometric mean concentration of HgF in juvenile Osprey (Pandion haliaetus) in Sweden was 5.25 ppm dry weight, which they considered low. Wood et al (1996) considered geometric mean HgF of 3.23 (ppm wet wt; n 5 61) in Florida Bald Eagle nestlings as ''background.''…”

Section: Discussionmentioning

confidence: 98%

“…Hg is of primary concern in aquatic environments studied (e.g., Sorensen et al 1990, Scheuhammer andGraham 1999) and Pb is of recent concern in upland habitats (Watson et al 2009), both of which are frequented seasonally by Bald Eagles. Selenium was included because of its reported detoxification properties for Hg (Yoneda and Suzuki 1997, Odsjö et al 2004, Yang et al 2007, Berry and Ralston 2008. Methods also permitted screening for other potentially toxic chemical elements not typically reported (Burger and Gochfeld 2009).…”

Section: Contaminantes Ambientales En Tejidos De Haliaeetus Leucocephmentioning

confidence: 99%

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Environmental Contaminants in Tissues of Bald Eagles Sampled in Southwestern Montana, 2006–2008

Harmata

2011

Journal of Raptor Research

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Blood and feathers of Bald Eagles (Haliaeetus leucocephalus) banded as nestlings (n 5 17), captured as free-flying (n 5 91), or submitted for rehabilitation (n 5 29) in southwestern Montana between December 2005 and April 2008 were sampled for mercury (Hg), selenium (Se), lead (Pb), seven other trace elements, and organochlorines. Hg concentrations in blood (hereafter ''HgB'') did not differ between captured eagles and those submitted for rehabilitation, and HgB in both were higher than concentrations in nestlings (P , 0.01). Se concentrations in blood (''SeB'') were similar among groups. Pb concentrations in blood (''PbB'') were higher in captured eagles than in those submitted for rehabilitation (P 5 0.05). No bird submitted for rehabilitation exhibited toxic levels of PbB, but 9% of captured eagles did. HgB and PbB in captured eagles declined as date of capture advanced from autumn to spring. Hg and Se concentrations in feathers (''HgF''; ''SeF'') tended to increase with age-class. HgB and SeB, and HgB and HgF were correlated in nestlings and captured eagles (P , 0.05) but not in birds submitted for rehabilitation. Birds captured in autumn during this study had higher HgB (P , 0.05) than birds captured in autumn in the early 1990s, but SeB did not differ. HgB and SeB in birds captured in spring during this study were similar to those of birds captured in spring in the early 1990s, but PbB was lower. Five eagles were recaptured and resampled for contaminants up to 18 yr after initial banding and sampling but no time-trends were detected in contaminant concentrations due to small sample size. Other trace elements and organochlorines if detected in blood were at very low concentrations.

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Section: Discussionmentioning

confidence: 98%

Section: Contaminantes Ambientales En Tejidos De Haliaeetus Leucocephmentioning

confidence: 99%

Environmental Contaminants in Tissues of Bald Eagles Sampled in Southwestern Montana, 2006–2008

Harmata

2011

Journal of Raptor Research

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“…For this reason, some authors have suggested that the molar ratio of Se to Hg may be an indicator of the potential protective effect of Se on Hg, with a ratio somewhere above 1:1 being protective (Ralston, 2008(Ralston, , 2009Ralston et al, 2008Burger et al 2013. While Se acts as an antagonist to methyl Hg, there are indications that the amounts of Se in birds often are insufficient to bind all body Hg (Odsjö et al 2004;Lodenius and Solonen 2013). In our samples, we found no correlation between Hg mass fractions and Se ratios (r=0.245, p=0.360 n.s.…”

Section: Seleniummentioning

confidence: 99%

Retrospective biomonitoring of mercury and other elements in museum feathers of common kestrel Falco tinnunculus using instrumental neutron activation analysis (INAA)

Movalli

Bode

Dekker

et al. 2017

Environ Sci Pollut Res

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This study examines the potential to use instrumental neutron activation analysis (INAA) to explore temporal and geographical variation in exposure to heavy metals and other selected elements in common kestrel Falco tinnunculus using feathers from a natural history collection. The study gathered samples of two breast feathers from each of 16 adult male kestrel specimens from Naturalis Biodiversity Centre, collected in The Netherlands between 1901 and 2001. Feather samples were analysed for more than 50 elements, using INAA at the Reactor Institute Delft. Results (in mg/kg dw) were transformed into ratios of milligram of element per millimetre of feather length. The distribution of the mass fractions and ratios was plotted for each element against time and by geographical area. Observed mass fractions and/or ratios are discussed for selected elements (Hg, Cd, Zn, Pt, Pd, Se, Al, Rb, As, Sb, Cr, V, Cl, Br) known to have, at certain concentrations, adverse effects on raptors. Some samples show mass fractions of certain elements (Cr, Cd, Se, As) above levels known to have adverse effects. We conclude that the analysis of museum feathers using INAA provides reference values for concentrations of selected elements, including those of high societal concern such as Hg and Cd, against which to assess concentrations of these elements in feathers of present-day living raptor populations.

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“…There are some birds with a purely piscivorous diet, including pelicans, cormorants, darters, storks and egrets, all of which occur in northern Australia (Morton and Brennan 1991). Piscivorous birds have been shown to have high Hg concentrations (Odsjo et al 2004), and in some cases this has led to health impairments such as those observed with common loons in eastern Canada (Burgess and Meyer 2008).…”

Section: Where Might We See High Concentrations and Effects?mentioning

confidence: 99%

Northern Australia, whither the mercury?

Jardine

Bunn

2010

Mar. Freshwater Res.

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Biomagnification of mercury (Hg) leads to high concentrations in fish and subsequent health risks for fish-eaters. Despite the global concern afforded to Hg over the past 40 years, little attention has been paid to this toxic heavy metal in Australia in general, and tropical northern Australia in particular. This review examines past Hg research in Australia and explores seven hypotheses as to why so little research and monitoring has been conducted in northern rivers and estuaries. We rule out the possibility that fishing intensity (an indicator of potential Hg exposure in humans) is lower in Australia than in other countries with more intensive Hg research programs. Instead, we hypothesise that low atmospheric deposition, owing to prevailing wind direction and few local point sources, coupled with highly productive waterbodies, contributes to low Hg bioaccumulation and hence the reduced interest in measuring Hg. Outstanding questions regarding Hg in northern Australia include the assessment of atmospheric deposition rates of Hg, the trophic level and growth and food consumption rates of consumers such as large-bodied fishes, linkages between fire regimes and Hg availability, and the capacity for in situ Hg methylation in tropical systems.

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The Tail Feathers of Osprey Nestlings (Pandion haliaetus L.) as Indicators of Change in Mercury Load in the Environment of Southern Sweden (1969–1998): Case Study with a Note on the Simultaneous Intake of Selenium

Cited by 5 publications

References 29 publications

Environmental Contaminants in Tissues of Bald Eagles Sampled in Southwestern Montana, 2006–2008

Environmental Contaminants in Tissues of Bald Eagles Sampled in Southwestern Montana, 2006–2008

Retrospective biomonitoring of mercury and other elements in museum feathers of common kestrel Falco tinnunculus using instrumental neutron activation analysis (INAA)

Northern Australia, whither the mercury?

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