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Fig. 2. Changes in haematocrit in warm-acclimated rainbow trout induced by four
phenylhydrazine hydrochloride injections (syringe symbol) at weeks 0, 2, 4 and
6 (solid line and triangles) and compared with sham-injected control fish
receiving saline (solid line and circles). The dotted lines represent the
recovery periods. Mean values ± s.e.m. at weeks 0, 2, 4, 6, 8 and 12
represent N=6 fish and all other sample times represent N=3
fish. *Significant difference (P<0.05) between a
time-matched PHZ-treated and sham-injected group, as determined by Student's
t-test statistic (P<0.05).