Sambasivam S, Karpagam G, Chandran R, Khan S Ajmal
Department of Zoology, Presidency College (Autonomous), Chennai-600 005, India.
J Environ Biol. 2003 Apr;24(2):201-4.
The usefulness of leaf extract as an ideal source of 'piscicide' in shrimp farming is described Leaf toxins are safe, eco-friendly and biodegradable. The fish Tilapia, Oreochromis mossambicus was exposed to the extract and the percentage of mortality at the end of 24,48, 72 and 96 hrs was recorded. The respective toxic range of aqueous, alcohol and acetone extracts of 24 hr LC50 and 96 hr LC50 values were found to be respectively 1118.79-330.30, 699.24-129.02 and 749.95-347.23 mg dry extract/litre for Oreochromis mossambicus. The LC50 values observed in different time periods in the fish exposed to aqueous extract were relatively high compared to the values obtained in acetone and alcohol extracts. Use of leaf extract, as piscicide in aquaculture farms is considered advantageous when viewed against the backdrop of using persistent chemicals.
本文描述了树叶提取物作为虾类养殖中理想“鱼毒剂”来源的用途。树叶毒素安全、环保且可生物降解。将罗非鱼（莫桑比克罗非鱼）暴露于该提取物中，并记录24、48、72和96小时结束时的死亡率。对于莫桑比克罗非鱼，水提取物、酒精提取物和丙酮提取物在24小时半数致死浓度（LC50）和96小时LC50值的各自毒性范围分别为1118.79 - 330.30、699.24 - 129.02和749.95 - 347.23毫克干提取物/升。与丙酮提取物和酒精提取物的值相比，暴露于水提取物的鱼在不同时间段观察到的LC50值相对较高。从使用持久性化学品的背景来看，在水产养殖场使用树叶提取物作为鱼毒剂被认为是有利的。
