Biologists expect a record number of pink salmon to return to Puget Sound and Washington rivers and streams this year. And while that may seem like a good signal about salmon habitat, it's also ...

In addition, the salmon population has remained stable over the past 40 years, suggesting that the changes “have aided in the resilience of the population to environmental change”, says Kovach.

Chum salmon, a migratory species widely consumed in Japan, is losing out to a relative in a battle over food resources in the Northern Pacific Ocean triggered by global warming, a study found.