頁籤選單縮合
題 名 | 以曝氣移除殘氯對藻類、草蝦受精卵和幼苗之毒性=Using Aeration to Remove Toxic Effect of Chlorine Residual on Algae, Shrimp Fertilized Eggs and Larvae |
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作 者 | 郭錦朱; 劉冠甫; 許月娥; 陳紫媖; | 書刊名 | 水產研究 |
卷 期 | 15:2 2007.12[民96.12] |
頁 次 | 頁73-81 |
分類號 | 439.66 |
關鍵詞 | 氯; 毒性; 草蝦; 骨藻; 擬球藻; Chlorine; Toxicity; Penaeus monodon; Skeletonema costatum; Nannochloropsis oculata; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以氯消毒繁殖用水,藉由大量曝氣方式減少及去除水中殘氯後,清洗草蝦受精卵、培育草蝦苗和餌料生物,在此過程評估曝氣對水中殘氯去除之效果,以及殘氯對草蝦受精卵、幼苗及餌料生物培育之影響。結果顯示,以氯消毒之海水經曝氣方式處理,確可減少水中殘氯,曝氣時間與殘氯量呈顯著的線性負相關。此外,養殖水以1.8 mg/L的有效氯消毒,經24 hr的曝氣,殘氯檢測不出,且可應用於藻類培養、蝦苗清洗或繁殖上。由於各種生物對氯的忍受濃度不同,以曝氣方式減少殘氯供消毒或清洗所需時間亦有差異;對無節幼蟲期至糠蝦期的草蝦苗而言,需24 hr的曝氣,使殘氯量低於0.05 mg/L,而骨藻及擬球藻則分別需12及2 hr的曝氣時間,使殘氯量各低於0.8及1.5 mg/L。若以1.8 mg/L的有效氯直接消毒草蝦受精卵,則時間宜低於20 min。 |
英文摘要 | This study aimed to remove residual chlorine in chlorinated seawater for rearing Penaeus monodon larvae and algae by aeration method. The results show that chlorine can be removed gradually by aeration. The residual chlorine level is negatively correlated with the aeration time. The residual chlorine added at 1.8 mg/L available chlorine to seawater can not be detected after 24-hour aeration. Therefore, chlorinated seawater can be used for culturing algae, washing eggs and rearing larval shrimp. However, different aeration time is needed due to various tolerances of organisms to residual chlorine. The 24-hour aeration, with resulting residual chlorine level <0.05 mg/L, of chlorinated seawater is necessary for rearing P. monodon larvae. For culturing Nannochloropsis oculata and Skeletonema costatum, aeration for 2 hours (residual chlorine level <1.5 mg/L) and 12 hours (residual chlorine level <0.8 mg/L), respectively, is adequate. In addition, fertilized eggs of P. monodon disinfected with 1.8 mg/L available chlorine for less than 20 minutes does not have any negative effect on the hatching. |
本系統中英文摘要資訊取自各篇刊載內容。