3.4 Individual-level environmental control

For female Sakhalin taimen, between-year correlations of water temperature reached a maximum in the critical time window of 160–200 h (6.7–8.3 days) prior to each spawner’s arrival at a tributary site (r = 0.665, P = 0.001, Fig. 4a). The maximum correlation of water level occurred in the critical time window of 80–224 h (3.3–9.3 days) for the females (r = 0.602, P = 0.014, Fig. 4b). For males, however, neither water temperature nor water level produced significant maximum correlations (r = 0.484 and 0.508, respectively; P > 0.05).