High CO2 concentrations can turn fish into daredevils
High carbon dioxide concentrations in the ocean may turn fish into reckless daredevils, according to a study published in PNAS this week. When scientists exposed two different species of fish larvae to elevated carbon dioxide levels, the fish began to ignore the smell of predators, multiplying their mortality rate up to nine times the current level. The oceans are predicted to have high enough concentrations to completely impair the fishes' predator detection as early as the end of this century.
