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首页> 美国政府科技报告 >Copper Sensitivity of the Northern Anchovy, 'Engraulis mordax', During Its Early Life History
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Copper Sensitivity of the Northern Anchovy, 'Engraulis mordax', During Its Early Life History

机译：北凤凰的铜敏感性'Engraulis mordax'，在其早期生活史中

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The sensitivity to copper of embryonic and larval stages of the Northern anchovy, Engraulis mordax, was determined using a flow--through bioassay system. Anchovy embryos were exposed continuously from 8 to 10 h after fertilization until hatching, and the larvae were exposed within 24 h after hatching until yolk-sac absorption. During the testing, both total copper concentrations and the percent copper in labile forms were determined. From the cumulative mortality vs measured copper exposure data, a series of median lethal concentrations (LC50) were determined. These LC50 values were used to construct comparative toxicity curves. The anchovy life stage most sensitive to copper was the embryonic stage. For the anchovy embryo, the 12-h LC50 was 200 micrograms Cu/1, and the estimated incipient lethal concentration (ILC50) was 190 micrograms Cu/1; a sensitive period of embryonic development was noted prior to closure of the blastopore. The 12-h, 24-h, and Ilc50 for anchovy larvae were 460, 400, and 370 micrograms Cu/1, respectively.

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