PRODUCED BY TIEN NGUYEN FOR KNOWABLE MAGAZINE

Humans catch more fish than we ever have before. This ever-growing haul affects the size of the fish population, and over generations, the size of the fish. When fisheries go after mostly large fish, they create evolutionary pressure that favors the survival of smaller ones. Eventually, impacts from intense fishing could lead to food supply issues. In this video, Mikko Heino, a biologist at the University of Bergen, explains how this evolutionary effect works and what we can do to minimize human impacts on fish evolution.

READ MORE: The human hand in fish evolution