EsturgeonV1, Main, Merge, bibRecord, 000556

Toxicity of Copper to Early-life Stage Kootenai River White Sturgeon, Columbia River White Sturgeon, and Rainbow Trout

Identifieur interne : 000556 ( Main/Merge ); précédent : 000555; suivant : 000557

Toxicity of Copper to Early-life Stage Kootenai River White Sturgeon, Columbia River White Sturgeon, and Rainbow Trout

Auteurs : E. E. Little [États-Unis] ; R. D. Calfee [États-Unis] ; G. Linder [États-Unis]

Source :

Archives of environmental contamination and toxicology : (Print) [ 0090-4341 ] ; 2012.

RBID : Pascal:12-0408798

Descripteurs français

Pascal (Inist)
- Toxicité, Cuivre, Stade précoce, Stade développement, Cours eau, Pollution, Ecotoxicologie, Environnement, Milieu eau douce, Polluant, Acipenser transmontanus, Oncorhynchus mykiss, Rivière White, Rivière Columbia.
Wicri :
- topic : Cuivre, Pollution, Polluant.

English descriptors

KwdEn :
- Acipenser transmontanus, Copper, Developmental stage, Early stage, Ecotoxicology, Environment, Freshwater environment, Oncorhynchus mykiss, Pollutant, Pollution, Stream, Toxicity.

Abstract

White sturgeon (Acipenser transmontanus) populations throughout western North America are in decline, likely as a result of overharvest, operation of dams, and agricultural and mineral extraction activities in their watersheds. Recruitment failure may reflect the loss of early-life stage fish in spawning areas of the upper Columbia River, which are contaminated with metals from effluents associated with mineral-extraction activities. Early-life stage white sturgeon (A. transmontanus) from the Columbia River and Kootenai River populations were exposed to copper during 96-h flow-through toxicity tests to determine their sensitivity to the metal. Similar tests were conducted with rainbow trout (RBT [Oncorhynchus mykiss]) to assess the comparative sensitivity of this species as a surrogate for white sturgeon. Exposures were conducted with a water quality pH 8.1-8.3, hardness 81-119 mg/L as CaCO₂, and dissolved organic carbon 0.2-0.4 mg/L. At approximately 30 days posthatch (dph), sturgeon were highly sensitive to copper with median lethal concentration (LC₅₀) values ranging from 4.1 to 6.8 μg/L compared with 36.5 μg/L for 30 dph RBT. White sturgeon at 123-167 dph were less sensitive to copper with LC₅₀ values ranging from 103.7 to 268.9 μg/L. RBT trout, however, remained more sensitive to copper at 160 dph with an LC₅₀ value of 30.9 μg/L. The results indicate that high sensitivity to copper in early-life stage white sturgeon may be a factor in recruitment failure occurring in the upper Columbia and Kootenai rivers. When site-specific water-quality criteria were estimated using the biotic ligand model (BLM), derived values were not protective of early-life stage fish, nor were estimates derived by water-hardness adjustment.

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Pascal:12-0408798

Le document en format XML

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<term>Environment</term>
<term>Freshwater environment</term>
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<term>Cours eau</term>
<term>Pollution</term>
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<term>Rivière Columbia</term>
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<front><div type="abstract" xml:lang="en">White sturgeon (Acipenser transmontanus) populations throughout western North America are in decline, likely as a result of overharvest, operation of dams, and agricultural and mineral extraction activities in their watersheds. Recruitment failure may reflect the loss of early-life stage fish in spawning areas of the upper Columbia River, which are contaminated with metals from effluents associated with mineral-extraction activities. Early-life stage white sturgeon (A. transmontanus) from the Columbia River and Kootenai River populations were exposed to copper during 96-h flow-through toxicity tests to determine their sensitivity to the metal. Similar tests were conducted with rainbow trout (RBT [Oncorhynchus mykiss]) to assess the comparative sensitivity of this species as a surrogate for white sturgeon. Exposures were conducted with a water quality pH 8.1-8.3, hardness 81-119 mg/L as CaCO<sub>2</sub>
, and dissolved organic carbon 0.2-0.4 mg/L. At approximately 30 days posthatch (dph), sturgeon were highly sensitive to copper with median lethal concentration (LC<sub>50</sub>
) values ranging from 4.1 to 6.8 μg/L compared with 36.5 μg/L for 30 dph RBT. White sturgeon at 123-167 dph were less sensitive to copper with LC<sub>50</sub>
 values ranging from 103.7 to 268.9 μg/L. RBT trout, however, remained more sensitive to copper at 160 dph with an LC<sub>50</sub>
 value of 30.9 μg/L. The results indicate that high sensitivity to copper in early-life stage white sturgeon may be a factor in recruitment failure occurring in the upper Columbia and Kootenai rivers. When site-specific water-quality criteria were estimated using the biotic ligand model (BLM), derived values were not protective of early-life stage fish, nor were estimates derived by water-hardness adjustment.</div>
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Toxicity of Copper to Early-life Stage Kootenai River White Sturgeon, Columbia River White Sturgeon, and Rainbow Trout

Toxicity of Copper to Early-life Stage Kootenai River White Sturgeon, Columbia River White Sturgeon, and Rainbow Trout

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri