Figure 4
Water temperature and thermal tolerance data for two subpopulations of P. popeii in the Devils River. Red lines = glochidia, blue lines = juveniles, solid lines = LT05, and dashed lines = LT50. (A) Comparison of maximum daily water temperature at Grass Patch from March 2018 to August 2020 and laboratory derived thermal tolerance of Grass Patch P. popeii glochidia (24-h). (B) Comparison of maximum daily water temperature at Ruthies from October 2015 to August 2020 and laboratory derived thermal tolerance of Ruthies P. popeii for both glochidia (24-h) and juveniles (96-h).
