Overall, Cheung said total fish catches from the world???s oceans would be little changed by mid-century despite the shifts.???It???s more about reshuffling the catch,??? he said.The study made computer models for the movements of 1,066 species ??? 836 types of fish and 230 invertebrates, such as crabs and lobsters.Some species could die off, such as fish that thrive in cold waters and would have