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the interaction (Table 2). When data for constant and fluctuating regimes were combined, <br />hatch was higher at 18°C than at 22 or 26°C. Hatch at 30°C was 39%. <br />Survival.--Mean survival of larvae to d 7 in the 18-26°C treatments was 52-88% <br />(Table 1), and the overall ANOVA F-test was significant for both main effects <br />(temperature and regime), but not for the interaction (Table 2). Survival was highest at <br />26°C and was significantly different from the 18 and 22°C treatments; neither of the latter <br />temperature treatments were significantly different from each other. Survival was higher <br />in each fluctuating temperature treatment than in the corresponding constant temperature. <br />Most of the signif cance of the overall F-test for regimes was due to higher survival in the <br />18°C fluctuating than in the 18°C constant treatment. Survival of larvae to d 7 in the 30°C <br />treatment was 12.5%. <br />Abnormalities.--Abnormalities in the 18-26°C treatments was 2-22% (Table 1), <br />and the overall F-test was significant due to temperature level but not to regime or <br />interaction effects (Table 2). Lowest incidence of abnormalities was in the 26°C (4%, <br />regime combined) and 18°C (12.5%) treatments, which were not significantly different. <br />Mean percent abnormalities was higher in the 22°C treatments (19%); this rate was <br />significantly different only from that observed in the 26°C treatments. All larvae hatched <br />in 30°C were abnormal. <br />Timing of developmental events.--At a given temperature level, times to first <br />hatch, 50% hatch, and 100% hatch were generally similar for fluctuating and constant <br />regimes (Table 1). For example, time to initiation of hatching differed by 41 h between <br />18 and 26°C treatments (regimes combined). However, times for each hatching event <br />interval between the 18 and 26°C treatments (regimes combined) were nearly equal (41- <br />14 <br />