Field Science - Researchers studied the effects of environmental variables on angling catch rates (fish caught per hour) of northern pike in a lake in Germany. Factors tested included water temperature, wind speed, wind direction, humidity, rain, hours of sunshine, atmospheric pressure, pressure change in the last 24 hours, lunar cycle, fishing pressure and time of day. The In-Fisherman featured a study by Kuparinen, A., Klefoth, T., and Arlinghaus, R. on what really impacts the catch rate on pike in lakes. The publication can be found here.