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題 名 | Effects of Temperature on the Toxicity of Masoten to Larval Black Sea Bream, Acanthopgrus schlegeli=不同溫度下馬速展對黑鯛幼苗的毒性研究 |
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作 者 | 張正芳; 蘇茂森; 廖一久; | 書刊名 | 水產研究 |
卷 期 | 1:2 1993.12[民82.12] |
頁 次 | 頁31-37 |
分類號 | 439.5 |
關鍵詞 | 溫度; 毒性; 馬速展; 黑鯛; Temperature; Toxicity; Masoten; Black Sea Bream; |
語 文 | 英文(English) |
中文摘要 | 馬速展 (Masoten) 在治療黑鯛體外寄生蟲感染症時,雖施用相同之安 全劑量,但有時還會引起大量死亡。本試驗之目的在於探討不同溫度下馬速展 對黑鯛幼苗之毒性,以建立本藥物使用之安全方法。將 810 尾黑鯛幼苗,平均 體重為 0.78 g,分成三種溫度 (22, 26, 30℃)×九種藥物濃度 (0, 0.12, 0.21, 0.36, 0.62, 1.07, 1.85, 3.2,5.54 ppm) 之27試驗組,每組三重覆。試驗結果顯示,24 小時之半數致死濃度 22℃ 為2.34 ppm,26℃ 為 1.43 ppm,30℃ 為 0.57 ppm; 48小時之半數致死濃度22℃為1.31 ppm,26℃為 0.80 ppm,30℃為 0.43 ppm。 溫度越高馬速展對黑鯛幼苗的毒性越強 (P<0.0001),當水溫由22℃上升至30℃ 時,馬速展對黑鯛幼苗的毒性增強 3~4 倍。 |
英文摘要 | Heavy mortalities of black sea bream have occurred from time to time during or after a routine organophosphate (mainly Masoten) treatment against ectoparasites. The purpose of this study was to determine the effects of temperature on the toxicity of Masoten to black sea bream to avoid mass fish kills due to overdosage. A total of 810 larval black sea bream, Acanthopagrus schlegeli, with a mean weight of 0.78 g were di- vided into 9 experimental groups and each treatment was triplicated. Each experimental group was randomly assigned to a 3 temperatures (22, 26 and 30℃) * 9 Masoten concentrations (0, 0.12, 0.21, 0.36, 0.62, 1.07, 1.85, 3.2 and 5.54 ppm) factorial design. Fish surviving 24-h and 48-h after exposure were studied. The results showed that the toxicity of Masoten to the larval fish increased significantly (p<0.0001) with increasing water temperature. The 24-h TLm of the larvae to Masoten was 2.34 ppm at a water temperature of 22 ℃, 1.43 ppm at 26℃ and 0.57 ppm at 30℃. Their 48-h TLm were 1.31 ppm (22 ℃), 0.80 ppm (26℃) and 0.43 ppm (30℃). Both 24-h and 48-h TLm increased 3~4 fold when the water temperature was increased from 22 to 30℃. |
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