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Winner/loser effects in tilapia as assessed by the percentage of victories in the second fights of previous winners and losers. The treated winners were injected with a high dose of KT and the treated losers were injected with CA 2 hours before the second fight. The dashed lines indicate the cut-off values to consider the occurrence of winner/loser effects according to Bégin et al. (1996) (black bars, control; white bars, treatment).
