Fig. 2

Categorized abiotic conditions per 1 m depth for each day of the year for A 2016, B 2017, and C 2018. Black shading is hypoxic (< 3 mg/L), green represents physiologically optimal for walleye (Sander vitreus; 18–23 °C, > 5 mg/L), and white is suitable (all temperatures, > 3 mg/L)