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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
03/08/1998 |
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Data da última atualização: |
28/03/2017 |
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Autoria: |
BEYER, W. N.; SPALDING, M.; MORRISON, D. |
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Título: |
Mercury concentrations in feathers of wading birds from Florida. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Ambio, v.26, n.2, p.97-100, Mar. 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
Primary or tail feathers were collected from 92 wading birds in Florida from Lake Okeechobee and wetlands farther south, from 1987 to 1990. Mean concentrations detected in feathers of nestling were 2.0 ppm Hg in roseate spoonbills (Ajaia ajaja), 3.5 ppm Hg in great blu herons (Ardea herodias), 4.7 ppm Hg in great white herons (Ardea herodias accidentalis) and 7.1 ppm Hg in great egrets (Casmerodius albus). Concentrations in feathers of great white herons increased with the age of the bird, from 4.7 ppm Hg in nestlings, to 6.7 ppm Hg in juveniles and 8.2 ppm Hg in adults. Mercury concentratioons were greatest in species consuming large fish. Feathers collected from wood storks (Mycteria americana) contained an average of 3.3 ppm Hg. Mercury concentrations is feathers of wading birds from southern Florida were greather than those reported in fethers of wading birds from Asia. Both liver and feather Hg concentrations were Known for 25 wading birds. The regression of liver (wet weight) Hg concentrations (Y) on feather Hg concentrations (X) was: log(Y) = 1.52 log(X) - 0.722. The correlation coefficient was 0.84. If repropductive disorders are expected when concentrations in feather of adult birds average 9 ppm Hg, as might be inferred from a published laboratory study on mallards (Anas platyrhynchos), then Hg in southern Florida may be high enough to reduce reproductivity of wading bird populations. However, additional controlled studies are needed before a minimum toxic concentrations in feathers can be designated with confidence. MenosPrimary or tail feathers were collected from 92 wading birds in Florida from Lake Okeechobee and wetlands farther south, from 1987 to 1990. Mean concentrations detected in feathers of nestling were 2.0 ppm Hg in roseate spoonbills (Ajaia ajaja), 3.5 ppm Hg in great blu herons (Ardea herodias), 4.7 ppm Hg in great white herons (Ardea herodias accidentalis) and 7.1 ppm Hg in great egrets (Casmerodius albus). Concentrations in feathers of great white herons increased with the age of the bird, from 4.7 ppm Hg in nestlings, to 6.7 ppm Hg in juveniles and 8.2 ppm Hg in adults. Mercury concentratioons were greatest in species consuming large fish. Feathers collected from wood storks (Mycteria americana) contained an average of 3.3 ppm Hg. Mercury concentrations is feathers of wading birds from southern Florida were greather than those reported in fethers of wading birds from Asia. Both liver and feather Hg concentrations were Known for 25 wading birds. The regression of liver (wet weight) Hg concentrations (Y) on feather Hg concentrations (X) was: log(Y) = 1.52 log(X) - 0.722. The correlation coefficient was 0.84. If repropductive disorders are expected when concentrations in feather of adult birds average 9 ppm Hg, as might be inferred from a published laboratory study on mallards (Anas platyrhynchos), then Hg in southern Florida may be high enough to reduce reproductivity of wading bird populations. However, additional controlled studies are needed before a minimum toxic concentr... Mostrar Tudo |
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Palavras-Chave: |
Ave; Bird; Concentracao; Concentrations; Feather; Pena. |
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Thesagro: |
Mercúrio. |
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Thesaurus Nal: |
Florida; mercury. |
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Categoria do assunto: |
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Marc: |
LEADER 02155naa a2200253 a 4500
001 1792763
005 2017-03-28
008 1997 bl --- 0-- u #d
100 1 $aBEYER, W. N.
245 $aMercury concentrations in feathers of wading birds from Florida.
260 $c1997
520 $aPrimary or tail feathers were collected from 92 wading birds in Florida from Lake Okeechobee and wetlands farther south, from 1987 to 1990. Mean concentrations detected in feathers of nestling were 2.0 ppm Hg in roseate spoonbills (Ajaia ajaja), 3.5 ppm Hg in great blu herons (Ardea herodias), 4.7 ppm Hg in great white herons (Ardea herodias accidentalis) and 7.1 ppm Hg in great egrets (Casmerodius albus). Concentrations in feathers of great white herons increased with the age of the bird, from 4.7 ppm Hg in nestlings, to 6.7 ppm Hg in juveniles and 8.2 ppm Hg in adults. Mercury concentratioons were greatest in species consuming large fish. Feathers collected from wood storks (Mycteria americana) contained an average of 3.3 ppm Hg. Mercury concentrations is feathers of wading birds from southern Florida were greather than those reported in fethers of wading birds from Asia. Both liver and feather Hg concentrations were Known for 25 wading birds. The regression of liver (wet weight) Hg concentrations (Y) on feather Hg concentrations (X) was: log(Y) = 1.52 log(X) - 0.722. The correlation coefficient was 0.84. If repropductive disorders are expected when concentrations in feather of adult birds average 9 ppm Hg, as might be inferred from a published laboratory study on mallards (Anas platyrhynchos), then Hg in southern Florida may be high enough to reduce reproductivity of wading bird populations. However, additional controlled studies are needed before a minimum toxic concentrations in feathers can be designated with confidence.
650 $aFlorida
650 $amercury
650 $aMercúrio
653 $aAve
653 $aBird
653 $aConcentracao
653 $aConcentrations
653 $aFeather
653 $aPena
700 1 $aSPALDING, M.
700 1 $aMORRISON, D.
773 $tAmbio$gv.26, n.2, p.97-100, Mar. 1997.
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Registro original: |
Embrapa Pantanal (CPAP) |
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