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Fig. 3. (A) Change in relative ventricular mass in warm-acclimated rainbow trout
induced by four phenylhydrazine hydrochloride injections at weeks 0, 2, 4 and
6 (solid line and triangles) 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. +Significant difference
(P<0.05) from the pre-treatment control value at week 0, as
detected by ANOVA and Dunnett's test. *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). (B) A linear relationship exists between wet and dry
rMV, indicating constant water content among treatment
groups.