February 1, 2022 — Scientific markers used to predict the health and productivity of marine species such as juvenile salmon were positive in 2021, the second most favorable since 1998, according to analysis from the National Oceanic and Atmospheric Administration (NOAA). Fisheries biologists are cautiously optimistic that those conditions will persist into the near future, supporting the health of juvenile, ocean-run salmon off the coasts of Washington and Oregon.
The report looked at a number of oceanic health markers: atmospheric conditions, water temperature, salinity, oxygen levels, current movement, and biomass of Chinook and Coho salmon, along with food sources such as plankton and small crustaceans. Many of those indicators were more favorable than every year in the last 24, outside of 2008.
“Every once in a while, things are in alignment. … In 2021, everything from water temperatures to phytoplankton, zooplankton, and larval fishes were pointing in the same direction,” Brian Burke, a fishery biologist with NOAA, told MyNorthwest.
Burke attributes those conditions to a strong upwelling in the Pacific along the 45-degree parallel north, a term which refers to atmospheric and ocean conditions that bring cold, nutrient rich water from the deep ocean toward the surface.