The effect is concentration dependent, with a minimum survival in 5ppm for 48 h in arsenite and in 10 ppm in coper for 24h, with a maximum tolerant in 10,758 ppm in nickel for 24h.

• 毒力大小因重金属的浓度而异,砷48小时最小成活浓度值为 5ppm,24小时铜的最小成活浓度值为10ppm,而在24小时中对镍的最大耐受浓度是 10,758ppm。