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Comparison of trace element concentrations in grey heron and black-crowned night heron chicks.

Environmental monitoring and assessment (2014-11-21)
Jungsoo Kim, Jong-Min Oh
ABSTRACT

Cadmium (Cd), lead (Pb), manganese (Mn), zinc (Zn), and iron (Fe) concentrations were measured in the prey and liver of grey heron (Ardea cinerea) and black-crowned night heron (Nycticorax nycticorax) chicks (24-26 days after hatching) at the Pyeongtaek colony, Korea in 2001 (n = 10, respectively) and 2008 (n = 11 and n = 10). Cadmium and Pb concentrations in livers of grey heron (Cd geomean 0.06, Pb 3.90 μg/g dw) and black-crowned night heron (Cd 0.20, Pb 4.24 μg/g dw) chicks were increased with diet concentrations of grey heron (Cd 0.18, Pb 1.76 μg/g dw) and black-crowned night heron (Cd 0.20, Pb 3.96 μg/g dw) chicks. Cadmium and Pb concentrations in prey items of grey heron and black-crowned night heron chicks were a good predictor of chick liver concentrations. Cadmium concentrations in livers of both heron species collected at the Pyeongtaek heronry were relatively low and within the background level (<3 μg/g dw) for birds. Five of 20 (25.0%) grey heron and 4 of 18 (22.2%) black-crowned night heron chicks were higher than the background level for lead (>6 μg/g dw). Prey Cd and Pb concentrations were within the range of other heron and egret studies. Manganese, Zn, and Fe concentrations in grey heron and black-crowned night heron chicks were within the background or normal physiological levels reported earlier in other birds including herons and egrets.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Zinc, dust, <10 μm, ≥98%
Sigma-Aldrich
Zinc, granular, 20-30 mesh, ACS reagent, ≥99.8%
Sigma-Aldrich
Zinc, purum, powder
Sigma-Aldrich
Zinc, powder, <150 μm, 99.995% trace metals basis
Sigma-Aldrich
Zinc, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.9%, granular
Sigma-Aldrich
Cadmium, powder, −100 mesh, 99.5% trace metals basis
Sigma-Aldrich
Zinc, nanopowder, 40-60 nm avg. part. size, ≥99% trace metals basis
Sigma-Aldrich
Zinc, foil, thickness 0.25 mm, 99.9% trace metals basis
Sigma-Aldrich
Cadmium, granular, 30-80 mesh, ≥99%
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Cadmium, granular, ≥99%, 5-20 mesh
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Zinc, granular, 30-100 mesh, 99%
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Zinc, foil, thickness 0.25 mm, 99.999% trace metals basis
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Zinc, shot, <12 mm, 99.99% trace metals basis
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Zinc, foil, thickness 1.0 mm, 99.99% trace metals basis
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Zinc preparation, 5 g/dL Zn+2 in THF, highly reactive Rieke®metal
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Zinc, mossy, ≥99%
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Zinc, shot, 99.9999%
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Zinc, sticks, diam. 7-10 mm, 99.97% trace metals basis
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Zinc, wire, diam. 1.0 mm, 99.995% trace metals basis
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Zinc, shot, 5 mm, 99.999% trace metals basis
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Zinc, pieces, 2-14 mesh, 99.9% trace metals basis
Zinc, foil, 100x100mm, thickness 0.1mm, as rolled, 99.95+%
Zinc, foil, 300x300mm, thickness 0.20mm, as rolled, 99.95+%
Sigma-Aldrich
Zinc, mossy, 99.99% trace metals basis
Zinc, foil, 300x300mm, thickness 0.1mm, as rolled, 99.95+%
Zinc, foil, 1m coil, thickness 0.05mm, as rolled, 99.95+%
Zinc, foil, 100x100mm, thickness 0.125mm, as rolled, 99.95+%
Cadmium, foil, 100x100mm, thickness 1.0mm, as rolled, 99.99%
Zinc, foil, 150x150mm, thickness 0.25mm, as rolled, 99.95+%
Zinc, foil, 150x150mm, thickness 0.35mm, as rolled, 99.95+%