Spawning pink salmon are shown in Anan Creek near Wrangell, Alaska, in 1991. In 2019, wild populations of pink salmon are flourishing. Their numbers are enhanced by the annual release of 1.8 billion fish from Alaska hatcheries and critics say they’re having an effect on other species. (Alaska Department of Fish and Game via AP)

Spawning pink salmon are shown in Anan Creek near Wrangell, Alaska, in 1991. In 2019, wild populations of pink salmon are flourishing. Their numbers are enhanced by the annual release of 1.8 billion fish from Alaska hatcheries and critics say they’re having an effect on other species. (Alaska Department of Fish and Game via AP)

Scientists warn of too many pink salmon in North Pacific

Comprise nearly 70 percent of what’s now the largest number of salmon populating the North Pacific.

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