질산성 질소가 감성돔(Acanthopagrus schlegelii) 치어에 미치는 급성 독성 영향
Acute Nitrate Nitrogen Toxicity in Juvenile Blackhead Seabream Acanthopagrus schlegelii
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참고문헌
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초록
This study evaluated acute nitrate nitrogen (NO3-N) toxicity in juvenile blackhead seabream Acanthopagrus schlegelii. Seventy juveniles (Trial A, 7.1±0.6 g) and nine juveniles (Trial B, 71.3±3.5 g) per 70 L tank were exposed to NO3-N concentrations of 0, 500, 1500, 2500, 3500, and 4500 mg/L and 0, 600, 1200, 1800, 2400, and 3000 mg/L, respectively, in triplicate for 7 days. In Trial A, all fish exposed to 3500 and 4500 mg NO3-N/L died within 48 h; in Trial B, all fish exposed to 3000 NO3-N/L died after 120 h. The 96 LC50 and 168 LC50were 2505 and 1806 mg NO3-N/L, respectively, in Trial A, and 2663 and 2377 mg NO3-N/L in Trial B. Large juveniles were more resistant to NO3-N than small juveniles. The results of acute NO3-N toxicity studies provide important data for subsequent chronic toxicity studies.
Abstract
This study evaluated acute nitrate nitrogen (NO3-N) toxicity in juvenile blackhead seabream Acanthopagrus schlegelii. Seventy juveniles (Trial A, 7.1±0.6 g) and nine juveniles (Trial B, 71.3±3.5 g) per 70 L tank were exposed to NO3-N concentrations of 0, 500, 1500, 2500, 3500, and 4500 mg/L and 0, 600, 1200, 1800, 2400, and 3000 mg/L, respectively, in triplicate for 7 days. In Trial A, all fish exposed to 3500 and 4500 mg NO3-N/L died within 48 h; in Trial B, all fish exposed to 3000 NO3-N/L died after 120 h. The 96 LC50 and 168 LC50were 2505 and 1806 mg NO3-N/L, respectively, in Trial A, and 2663 and 2377 mg NO3-N/L in Trial B. Large juveniles were more resistant to NO3-N than small juveniles. The results of acute NO3-N toxicity studies provide important data for subsequent chronic toxicity studies.
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