Bioconcentration and elimination of avermectin B1 in sturgeon
Identifieur interne : 000131 ( PascalFrancis/Curation ); précédent : 000130; suivant : 000132Bioconcentration and elimination of avermectin B1 in sturgeon
Auteurs : JIANZHONG SHEN [République populaire de Chine] ; QIDI ZHANG [République populaire de Chine] ; SHUANGYANG DING [République populaire de Chine] ; SUXIA ZHANG [République populaire de Chine] ; Joel R. Coats [États-Unis]Source :
- Environmental toxicology and chemistry [ 0730-7268 ] ; 2005.
Descripteurs français
- Pascal (Inist)
English descriptors
Abstract
The bioconcentration and elimination of avermectin B1 in sturgeon muscle were investigated with high-performance liquid chromatography. Mean concentrations of 0.2 and I ng.ml-1 in water were maintained for a 22-d exposure period. The concentrations of avermectin B1α in muscle tissues reached steady state within 14 to 18 d. The level of avermectin B1 concentrations in the fish muscles was 7.75 ± 0.88 and 38.29 ± 1.65 ng.g-1 for the low and high concentrations, respectively, on day 22. The half-life (t1/2) of the concentrations for the two treated groups was 4.95 and 4.33 d for the low and high concentrations, respectively. Greater than 95% of the tissue concentrations were eliminated from the exposed fish after the 14- and 18-d elimination periods. The estimated values of the bioconcentration factor were 42 L/kg for the low-concentration group and 41 L/kg for high-concentration group, and these values were not significantly different (a = 0.05). Avermectin B1α does not strongly bioconcentrate in individual aquatic organism and would not be expected to biomagnify in the food chain.
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<front><div type="abstract" xml:lang="en">The bioconcentration and elimination of avermectin B<sub>1</sub>
in sturgeon muscle were investigated with high-performance liquid chromatography. Mean concentrations of 0.2 and I ng.ml<sup>-1</sup>
in water were maintained for a 22-d exposure period. The concentrations of avermectin B<sub>1α</sub>
in muscle tissues reached steady state within 14 to 18 d. The level of avermectin B<sub>1</sub>
concentrations in the fish muscles was 7.75 ± 0.88 and 38.29 ± 1.65 ng.g<sup>-1</sup>
for the low and high concentrations, respectively, on day 22. The half-life (t<sub>1</sub>
/2) of the concentrations for the two treated groups was 4.95 and 4.33 d for the low and high concentrations, respectively. Greater than 95% of the tissue concentrations were eliminated from the exposed fish after the 14- and 18-d elimination periods. The estimated values of the bioconcentration factor were 42 L/kg for the low-concentration group and 41 L/kg for high-concentration group, and these values were not significantly different (a = 0.05). Avermectin B<sub>1α</sub>
does not strongly bioconcentrate in individual aquatic organism and would not be expected to biomagnify in the food chain.</div>
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in water were maintained for a 22-d exposure period. The concentrations of avermectin B<sub>1α</sub>
in muscle tissues reached steady state within 14 to 18 d. The level of avermectin B<sub>1</sub>
concentrations in the fish muscles was 7.75 ± 0.88 and 38.29 ± 1.65 ng.g<sup>-1</sup>
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