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Fig. 2. Glycogen levels in rainbow smelt Osmerus mordax. (A) Glycogen
levels in various tissues of fish maintained at 8°C and sampled on 15
January 2004, immediately prior to the temperature decrease. Note the break in
axis that separates liver from other tissues. Values are means ±
s.e.m., N=4. Different letters over bars indicate a statistically
significant difference between tissues. (B) Glycogen levels in liver of fish
subjected to a controlled decrease in water temperature with either feeding
(open circles) or food deprivation (filled circles). The date at which the
temperature decrease was initiated (i.e. 15 January 2004) is used as day 0.
Filled square, liver glycogen content in fish maintained at ambient
temperature. Values are means ± s.e.m., N=4. Different letters
indicate a statistically significant difference between time points for the
fed group. Water temperature (°C) is shown in parentheses.