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"Northwest Fisheries Science Center"

Northwest Fisheries Science Center Results

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Estimating the Age of Endangered Southern Resident Killer Whales Using an Epigenetic Clock

A new molecular technique, known as an epigenetic clock, can help us understand killer whales’ population size, age structure, and reproductive rates. Southern Resident Connections - Post 31
April 07, 2023 - Feature Story ,
West Coast
Killer whales at sea. Photo shows two killer whales surfacing.

Inbreeding Contributes to Decline of Endangered Killer Whales

New genome sequencing shows Southern Residents are highly inbred. Southern Resident Connections - Post 30
March 20, 2023 - Feature Story ,
West Coast
An adult orca is swimming underwater, and a calf is next to its dorsal fin. The calf is surfacing from the water.

Inbreeding and Inbreeding Depression in Southern Resident Killer Whales

Information on inbreeding in Southern Resident killer whales and how it affects the population.
West Coast

Southern Residents Work Harder For Prey, But Catch Fewer Fish, New Research Finds

Researchers compared foraging of two resident killer whale populations. Southern Resident Connections - Post 29
March 07, 2023 - Feature Story ,
West Coast
Southern Resident killer whale jumping out of the water

Unsettled Pacific Ocean Offers Surprises as Climate Change Alters Ecosystem

New Ecosystem Status Report cites shakeup of familiar ecological relationships.
March 06, 2023 - Feature Story ,
West Coast
Big Sur coastline

West Coast Species on the Move as Climate Change Drives Ecological Shifts, Analysis Shows

New vulnerability assessment finds vulnerable species have complex habitat needs.
February 21, 2023 - Feature Story ,
West Coast
Run of salmon

Retrospective analysis of measures to reduce large whale entanglements in a lucrative commercial fishery

Marine mammal bycatch is a significant anthropogenic threat to recovering populations. Gear reduction in Washington (USA) crab fishery decreased entanglement risk to whales.
January 30, 2023 - Peer-Reviewed Research ,
West Coast

Over two decades of active wood reintroduction changes stream channel features and aquatic habitats of a forested river system

This study evaluated the geomorphic response of a dynamic gravelbed river to 23 years of wood additions.
December 19, 2022 - Peer-Reviewed Research ,
West Coast

2022 Summary of Ocean Ecosystem Indicators

Long-term monitoring of ocean conditions and their effect on juvenile Pacific salmon survival off Oregon and Washington.
West Coast

The CALFISH database: A century of California's non-confidential fisheries landings and participation data

Scientists curated 100 years worth of data describing landings and participation in California’s fisheries and made it available to the public.
December 13, 2022 - Peer-Reviewed Research ,
West Coast