Author: troyal

Lower Elwha, Partners Studying Chinook Salmon Returning to Dam-Free Elwha River

The Lower Elwha Klallam Tribe, in cooperation with Washington Department of Fish and Wildlife and Olympic National Park, is determining how many hatchery-origin and natural-origin chinook salmon are returning to the Elwha River since two fish-blocking dams were removed. The tribe and partners have been counting returning chinook adults from summer through early fall, and surveying chinook redds (egg nests) and collecting ear bones from salmon carcasses in mid-to-late September. When an ear bone, or otolith, is removed from a carcass and placed under a microscope at the state’s lab, scientists look for a mark on the bone that...

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Testing Low Dissolved Oxygen Levels on Chum Salmon Eggs

The Port Gamble S’Klallam Tribe is studying how low dissolved oxygen (DO) levels affect salmon egg development. The tribe took 18 adult female chum salmon that returned to the tribe’s Little Boston hatchery this past fall and exposed groups of them to tanks of fresh water with various DO levels. One group of fish was exposed to 10 milligrams of DO per liter of water, representing the preferred water conditions for healthy streams around Hood Canal. A second group was exposed to 2 milligrams of DO per liter and a third group was exposed to 3 milligrams of DO per liter. Each group was exposed in its assigned tank for 36 hours. “The brief exposure mimics...

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Lake Sutherland Kokanee, Elwha River Sockeye Possible Cousins

The Lower Elwha Klallam Tribe has discovered that Lake Sutherland kokanee is a unique population, possibly related to Elwha River sockeye. For nearly 15 years, the tribe has been studying the genetics and health of Lake Sutherland kokanee before, during and after the removal of the Elwha River’s two fish-blocking dams in 2011-2014. Lake Sutherland is connected to the river by Indian Creek. Aside from annual testing for parasites, bacteria and viruses, scientists from the National Oceanic and Atmospheric Administration and the University of Washington studied the kokanee’s genetics and egg sizes. “A genetics baseline showed that the Lake Sutherland kokanee population didn’t match up with other stocks...

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Shellfish, Tribe, Community Benefit from Port Gamble Bay Clean Up

Collaborative efforts to clean up an old lumber mill has paid off for shellfish in Port Gamble Bay. The Port Gamble S’Klallam Tribe and Pope Resources made sure the removal of nearly 8,600 pilings and 110,000 cubic yards of wood waste and sediment from the former Port Gamble Mill site had minimal effects on shellfish in the bay. “It was important to us that this work be done in a good way, not only for the tribe but for everyone who uses these beaches,” said Jeromy Sullivan, the Port Gamble S’Klallam Tribe chairman. The tribe worked with the state...

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Narrowing Down Pre-spawning Mortality Factors for Coho Salmon

The annual pre-spawning salmon mortality study at the Suquamish Tribe’s Grovers Creek Hatchery takes a different twist each year. After six years of learning how coho and chum salmon are affected by runoff from urban streets, scientists are narrowing down which pollutant is killing fish. This year, they focused on how tire residue in water affects juvenile and adult coho and chum salmon. “We want to figure out which concentration of the tire residue in the water will kill fish and how long after exposure do the fish become sick and die,” said Jen McIntyre, aquatic ecotoxicologist for Washington...

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    • Northwest Treaty Tribes is a service of Northwest Indian Fisheries Commission
    • Northwest Treaty Tribes Magazine for Fall 2017 Available Now
    • Billy Frank Jr Memorial Edition of the NWIFC Magazine Available Here
    • Treaty Rights at Risk

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