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Fig. 4. Effects of a rapid increase in environmental salinity (FW to 21 p.p.t.; 605
mOsm kg1) on (A) plasma osmolality (mOsm
kg1), (B) blood haematocrit (%) and (C) plasma angiotensin
concentration (pmol l1) of river lampreys (N=8 at
each time point: 0 h, 2 h, 4 h, 8 h and 24 h after transfer). Groups with
different letters differ significantly (ANOVA and post-hoc multiple
comparison tests). Asterisks signify groups that differ significantly from
time 0 h(*P<0.05, **P<0.01,
ANOVA followed by linear contrast analyses).