Threatened by warming waters, brook trout may be able to adapt to hotter weather

Brook trout may have a genetic trick up their scales when it comes to adapting, with limitations, to heatwaves that threaten their existence. A novel study led by researchers at Penn State suggests that brook trout — an iconic coldwater fish species native to streams and lakes in the eastern United States and Canada — are capable of mounting a protective genetic response to thermal stress that can be passed on from one generation to the next.