Tag Archives: physiological changes in fish

New study suggests catching the slowest swimmers, commercial fishermen are inadvertently helping fish species evolve to swim faster.

Dr. Killen and his colleagues investigated whether commercial fishing was prompting physiological changes, as faster fish had better chances of evading capture by . “Over time, the selective removal of poor-swimming fish could alter the fundamental physiological makeup of descendant populations that avoid fisheries capture,” explains Killen.  “Fish being trawled will try to swim at a steady pace ahead of the mouth of the net for as long as possible, but a proportion will eventually tire and fall back into the net,” said Killen Read the rest here 12:24