Climate change is one of the most important global processes that the Biosphere is
experiencing, and fish as a part of the Biosphere are not indifferent to this process.
Coldwater fish and, particularly the Brown trout (Salmo trutta), are very sensitive to the
predicted changes in temperature of rivers and streams. Fish are poikilotherms and their
body temperature and physiological rates are dependent on the environmental temperature,
as this is a key factor of their ecological niche. Gill surface is directly related to respiratory …