Samples in 1999 from fall chinook salmon in the Columbia River's Hanford Reach show that four-fifths of ... The mating of a genetically altered female and a normal male could then produce males ...

For the first time in years the number of Chinook salmon returning to spawn in the Yukon River is above the minimum set out in a Canada-U.S. treaty, but there are still concerns about the health and ...

The Fall-run Chinook salmon is much lower this year than ... Creek are too young and predominantly male. This year, 60% of the salmon are 2 years old and ... 2,500 female chinook salmon, ...

For every male salmon that doesn’t make it to their natal stream, at least two, sometimes three female salmon die. “This is causing skewed sex ratios in their spawning grounds, something that has been ...

Every year, rivers of chinook—the Pacific’s largest salmon—leave the ocean for an upstream trek into the streams of their birth. When these 4-to-6-year-olds reach home, they spawn and die ...

Experiment 1 (hormonal sex manipulation) Four sexually mature 3-year-old female and four sexually mature 2-year-old male (‘jack’) chinook salmon were randomly selected from broodstock held at ...

A Chinook salmon at Dagger Falls near the Middle Fork of the Salmon River in Idaho. There are 13 species of salmon and steelhead in the Columbia River drainage that are endangered.

KENWOOD — A female Chinook salmon swam steadily against the current in a shallow section of Sonoma Creek as several male fish splashed about behind her, jockeying for position, waiting for her ...

So far more than 500 Chinook salmon have made it to the Whitehorse hydro dam's fish ladder. Lawrence Vano, who manages a fish hatchery program at the fish ladder, is congratulating everyone who ...

For every male salmon that doesn't make it to their natal stream, at least two, sometimes three female salmon die. ... 2023 — Not all Chinook salmon are created equal, ...

Female adult sockeye from the Fraser River are dying at significantly higher rates than their male counterparts on the journey back to their spawning grounds, finds new UBC research. For every ...