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. 2014 Feb 4;9(2):e88030. doi: 10.1371/journal.pone.0088030

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).