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Figure 4


Fig. 4. Relationship between glycerol turnover (Ra glycerol) and glycerol concentration in resting trout during administration of saline (stars), norepinephrine (unfilled circles) or epinephrine (filled circles). Only values measured during the final 10 min of administration of saline, epinephrine and norepinephrine are included (110–120 min in Figs 1, 2, 3). Lines were fitted by linear regression for saline (y=4.326–0.375x), continuous line, r2=0.03, slope not different from 0 (P=0.905); for norepinephrine (y=2.750+0.860x), broken line, r2=0.05, slope not different from 0 (P=0.830); and for epinephrine (y=4.286+5.944x), dotted line, r2=0.48, slope different from 0 (P<0.05). Values are means ± s.e.m. (N=4 for saline and N=8 for catecholamines).





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