Fisheries play an increasingly important role in addressing global food and nutritional deficits , especially as climate change has already reduced global yields from key crops . Antarctic and Arctic systems support some of the world's largest fisheries, including those for Antarctic krill and Arctic walleye pollock , which constitute a critical source of protein and macronutrients to a growing population of seafood consumers, as well as various aquaculture and livestock feeds   . Marine sources of protein and nutrition are important in transformational future scenarios where dietary shifts and provisioning policies provide multiple co-benefits to equity, food security and carbon mitigation . Shifting spatial distributions of fish stocks have led to transboundary management challenges in the Atlantic, Bering Sea and Arctic areas previously inaccessible due to sea ice  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report