Figure 4.

Overlays of proportion of individuals at Arrhenius breakpoint temperatures (T_AB) and temperatures where heart rate is maximized (T_peak) and experience arrhythmia (T_Arr) reveal a temperature range where the proportion of individuals at T_AB relative to T_peak or T_Arr is maximized. Overlay of the proportion of individuals at T_AB and that have reached T_peak (A-C) and T_Arr (D-F) for 9°C (A,D), 12°C (B,E), and 15°C (C,F) incubation temperature groups. Smooths of proportion of individuals at T_AB are kernel density estimates of proportion of individuals at T_AB. Dashed and dotted curves are logistic curves of the proportion of individuals at T_peak and T_Arr. Logistic curves are the same as in Fig. 3. Hashed areas under curve indicate the temperature ranges where T_AB-T_peak and T_AB-T_Arr are maximized. Dark gray shaded area indicates temperature range that longfin smelt larvae are cultured at the Fish Conservation and Culture Laboratory (Supplementary Table 3), and light gray shaded areas indicate temperatures where larvae are most abundant in the San Francisco Estuary. Dotted lines indicate the temperature beyond which longfin smelt larvae are no longer observed in the field and dashed lines indicate the temperature where reduced larval growth rates have been measured.