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題 名 | 重金屬對各期紅尾蝦幼蝦毒性之影響 |
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作 者 | 林世榮; 丁雲源; | 書刊名 | 水產研究 |
卷 期 | 1:2 1993.12[民82.12] |
頁 次 | 頁55-65 |
分類號 | 439.6 |
關鍵詞 | 毒性; 重金屬; 半致死濃度; 紅尾蝦; Toxicity; Heavy metals; LC50; Penaeus penicillatus; |
語 文 | 中文(Chinese) |
中文摘要 | 不同階段之紅尾蝦 (Penaeus penicillatus) 幼蝦,於鹽度 30?32 ppt,pH 7.1~8.5 與水溫 25?27.5℃下,以靜止換水方式,暴露於不同濃度重金屬中,探 討汞、銅、鎘與鋅對紅尾蝦幼蝦急性毒性之影響,以及各期幼蝦對各種重金屬 之忍受度。汞、銅、鎘與鋅對紅尾蝦幼蝦各階段之24小時之LC50 分別為 0.14、 3.26、3.40 與 4.25mg/L,其毒性依序為 Hg > Cu > Cd > Zn。而48小時之LC50 分別為 0.06、2.20、1.90與 2.09 mg/L,則其毒性依序為Hg > Cd > Zn > Cu。 各期之幼蝦對重金屬之忍受度,因重金屬種類及發育期而不同,即幼蝦對銅與 鎘之耐性隨幼蝦日數增加而增加,但對汞與鋅之耐性則呈負相關性. |
英文摘要 | The tolerance of red-tail shrimp juveniles, Penaeus penicillatus, to heavy metal toxicity was examined by exposing the juveniles at various developmental stages to varying concentrations of mercury, copper, cadmium and zinc in 30~32 ppt seawater (pH 7.1~8.5) at 25~27℃. The static renewal method was used for daily water exchange. The results indicated that LC50-24 h of Hg, Cu, Cd and Zn was 0.14, 3.26, 3.40 and 4.25 mg/L, respectively. The order of the toxicity was Hg > Cu > Cd > Zn. LC50 of Hg, Cu, Cd and Zn at 48 h was 0.06, 2.20, 1.90 and 2.09 mg/L, respectively, and the order of toxicity was found to be Hg > Cd > Zn > Cu. The toxicity tolerance of shrimp juveniles to the heavy metals varied with developmental stages; the tolerance to copper and cadmium increased as the development proceeded, while that to mercury and zinc declined as the shrimp developed. |
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