The anesthetic properties of clove oil were tested on chinook salmon Oncorh
ynchus tshawytscha, coho salmon O. kisutch, rainbow trout O. mykiss, and wh
ite sturgeon Acipenser transmontanus. The median lethal concentrations for
a 10-min exposure were 62 mg/L for chinook salmon, 96 mg/L for coho salmon,
250 mg/L for rainbow trout, and 526 mg/L for white sturgeon. A dosage of 2
5 mg/L was effective in anaesthetizing all species for 120 min without mort
ality.