Table 2. Number of fish choosing not to enter the light compartment after exposure to three euthanasia agents.
Complete Rejection | Re-entered | |
TMS | 9/17 | 8/17 |
Clove oil | 3/16 | 13/16 |
Metomidate hydrochloride | 2/18 | 16/18 |
Complete rejection was defined as no attempted entries into the previously preferred light compartment. Fish were tested following exposure to TMS (n = 17), clove oil (n = 16), and metomidate hydrochloride (n = 18).