Fig. 2. Temperature dependence of mitochondrial respiration in body wall tissue of Arenicola marina winter (A) and pre-spawning summer (B) animals. Data are means ± S.D.; N=5–10 isolations. Black bars, 10°C; hatched bars, 1°C. All 10°C values differ significantly from the values at 1°C (P<0.001); ^*All 1°C values are significantly different from the 10°C measurement in summer animals (P<0.001); significantly different from summer animals at the same experimental temperature and in the same respiratory state (P<0.014) (ANOVA; Newman–Keuls test).