“Global warming to affect fish guts – The gastrointestinal system of fish is much more sensitive to rises in sea temperatures than previously thought, according to new research”
“When the temperature of the water rises, the fish’s body temperature climbs, activity in the gut increases, and more energy is needed to stay healthy,” said Mr Gräns. “Since changes in body temperature affect virtually all of a fish’s organs, it’s surprising that we know so little about how temperature changes impact on their physiology.”
While some fish species could benefit from rising water temperatures, other may find it harder to absorb nutrients.
Homeothermmorphism.
The fish doesn’t care what the temperature is.
Total agenda-driven speculation. From the link, “While some fish species could benefit from rising water temperatures, other may find it harder to absorb nutrients.”
“other (fish species) may find it harder to absorb nutrients”?
Obvious speculation, not science.
The Arrhenius Equation is science. It shows that kinetic chemical reaction rates increase with temperature. The rate approximately doubles for an increase of 10° C, and for a temperature change of 1 ° C it will increase only about 7%. This will NOT slow down a fish’s digestion system.
Obviously the fish has a better understanding of chemical kinetics than some of the wise men. However, salmon seem to think that 55F is ideal for the digestion of alewives.