Figure 5
Water temperature and discharge data from two sites in the Devils River overlaid with thermal tolerance data for P. popeii and its host fish. Blue circles = maximum daily water temperature, black polygon = mean daily discharge, red lines = thresholds for glochidia, blue lines = thresholds for juveniles, solid lines = LT05, dashed lines = LT50, and pink rectangle = host fish lethal tolerance range. (A) Comparison of maximum daily water temperature at Grass Patch from March 2018 to August 2020 to laboratory derived thermal tolerance of Grass Patch P. popeii and its presumptive host fish. (B) Comparison of maximum daily water temperature at Ruthies from October 2015 to August 2020 to laboratory derived thermal tolerance of Ruthies P. popeii and its presumptive host fish.
