January 30, 2024 — Marine heat waves appear to trigger earlier reproduction in juvenile Pacific cod, leading to higher mortality in the species’ early life stages and fewer juvenile fish surviving in the Gulf of Alaska, according to research from the Oregon State University.
During 2014 to 2016 and again in 2019, unusually high ocean temperatures were followed by steep declines in adult Gulf of Alaska cod. The fishery was closed in 2020, and a federal fishery disaster was declared in 2022.