First Nations groups in the Yukon Territory and Alaska GOP Gov. Mike Dunleavy's administration are advancing discussions about whether hatcheries could help stem a steep crash in salmon populations on the Yukon River.

“Dramatic”, says researcher Henrik H. Berntsen. The Norwegian Environment Agency has launched a major offensive to get rid of the invasive species. But, despite more fishing, there appear to be ever more humpback salmon arriving in Norwegian rivers. Currently, around 70,000 pink salmon have been caught in Norwegian watercourses this year.

'Unprecedented numbers' of pink salmon were seen in 2017 and the fish have been spotted again this year.

After learning about catches of pink salmon near Salluit, Quebec wildlife officials are urging any fishers who net the newcomers to report their catch. Two pink salmon were netted in Nunavik during the summer of 2019 in the Ungava Bay region, one near Kangirsuk.

One theory is the pinks were traveling somewhere else to spawn, and taking a longer than usual route to avoid warming water.

Only one, located in British Columbia's Thompson River, is considered stable.

Drought and high temperatures have dried the creek and caused thousands of pink salmon and Dolly Varden to die before they could spawn. The event raises questions about vulnerability of area salmon streams to climate change, and for local residents food security.

Study finds genetic evidence of climate-change adaptation.