Fig. 5. Ratios of hsp72 to hsp74 levels in three Tegula congeners field-acclimatized (July 1997) and laboratory-acclimated to 13, 18 or 23°C for 30–34 days. Values are means +1 S.E.M. (N=5 for all data points except for T. brunnea at 18°C, for which N=4). For further details, see Fig. 3.