关键词: 全雄黄颡鱼, 铬, 锌, 镉, 急性毒性, 半数致死浓度, 安全评价, Pelteobaqrus fulvidraco, Cr , Zn , Cd, acute toxicity, LC50 , safe assessment

Abstract: The medium lethal concentration (LC50) and the safe concentration (SC) of three heavy metals ([Cr6+], [Zn2+] and [Cd2+]) to “all male No.1” seed of Pelteobaqrus fulvidraco were tested at 28±1.5 ℃, pH6.5~7.0. The results showed that the LC50 of 24 h, 48 h, 72 h and 96 h for [Cr6+] to “all male No.1” seed of P. fulvidraco were 168.71, 84.85, 52.23 and 34.46 mg.L-1, respectively; the LC50 of 24 h, 48 h, 72 h and 96 h for [Zn2+] to “all male No.1” seed of P. fulvidraco were 5.36, 3.34, 3.12 and 2.75 mg.L-1, respectively; the LC50 of 24 h, 48 h, 72 h and 96 h for [Cd2+] to “all male No.1” seed of P. fulvidraco were 1.87, 1.74, 1.63 and 1.15 mg.L-1, respectively. The safe concentration of [Cr6+], [Zn2+] and [Cd2+] to “all male No.1” seed of P. fulvidraco were 3.45, 0.28 and 0.12mg.L-1, respectively. Taken together, to “all male No.1” seed of P. fulvidraco, the toxicity of three heavy metal ions was in the order of [Cd2+]>[Zn2+]>[Cr6+], while [Zn2+] and [Cd2+] have medium toxicity, and [Cr6+] have low toxicity.