Orcas are Hungry
One of the things that distinguishes Southern Residents from other orcas is what they eat. Unlike other orcas which eat different kinds of fish, seals, octopus, and other marine mammals, Southern Residents eat mostly Chinook salmon. Scientists estimate that 80 percent of their diet comes from this once plentiful fish.1
The declines in the number of salmon began in the late 1800s. As cities and towns grew, salmon habitat was destroyed. Logging, farming, dams, pollution, and water use damaged the places salmon live. By the end of the 1900s, salmon species were listed as threatened or endangered across three-fourths of Washington State, with Chinook being the least abundant. Not only are there fewer of them, but Chinook, which are the largest of the Pacific Salmon species, are getting smaller.2
To improve salmon populations, hatcheries were built to produce salmon so there would be enough for industries, for food, and for recreational fishing, and now for conservation and orca recovery purposes.
In 1999, the State wrote its first Statewide Strategy for Recovering Salmon: Extinction is not an Option. The strategy recommended creating a network of organizations in seven salmon recovery regions across the state. Those recovery organizations wrote plans for the salmon, steelhead, and bull trout in their areas, and today are implementing those plans. The strategy was updated in 2021: Governor’s Salmon Strategy Update.
The work to date, has slowed some of the declines but far more needs to be done. Experts estimate that only 22 percent of the projects needed is being funded today. The chart below provides an overview of how salmon and steelhead are doing in Washington.
To see more details about salmon recovery efforts and how salmon are faring in your community, visit the State of Salmon in Watersheds Web site.
The task force developed several recommendations for increasing the number of salmon. Learn more about these recommendations and the progress being made.
Photograph by the National Oceanic and Atmospheric Administration
1M. J. Ford, J. Hempelmann, M. B. Hanson, K. L. Ayres, R. W. Baird, C. K. Emmons, J. I. Lundin, G. S. Schorr, S. K. Wasser and L. K. Park, “Estimation of a Killer Whale (Orcinus orca) Population’s Diet Using Sequencing Analysis of DNA from Feces,” PLoS ONE, p. 11(1):e0144956. Doi:10.1371/journal.pone.0144956, 2016.
2Ohlberger, E. J. Ward, D. E. Schindler and B. Lewis, “Demographic changes in Chinook salmon across the Northeast Pacific Ocean,” Fish and Fisheries, pp. 533-546, 2018.
Task Force Recommendations
Significantly increase investment in restoration and acquisition of habitat in areas where Chinook stocks most benefit Southern Resident orca.
Immediately fund acquisition and restoration of nearshore habitat to increase the abundance of forage fish for salmon sustenance.
Apply and enforce laws that protect habitat.
Immediately strengthen protection of Chinook and forage fish habitat through legislation that amends existing statutes, agency rulemaking, and/or agency policy.
Develop incentives to encourage voluntary actions to protect habitat.
Significantly increase hatchery production and programs to benefit Southern Resident orcas consistent with sustainable fisheries and stock management, available habitat, recovery plans, and the Endangered Species Act. Hatchery increases need to be done in concert with significantly increased habitat protection and restoration measures.
Prepare an implementation strategy to reestablish salmon runs above existing dams, increasing prey availability for Southern Resident orcas.
Increase spill to benefit Chinook for Southern Residents by adjusting total dissolved gas allowances at the Snake and Columbia River dams.
Establish a stakeholder process to discuss potential breaching or removal of the lower Snake River Dams for the benefit of Southern Resident orcas.
Support full implementation and funding of the 2019–28 Pacific Salmon Treaty.
Reduce Chinook bycatch in West Coast commercial fisheries.
Direct the appropriate agencies to work with tribes and the National Oceanic and Atmospheric Administration to determine if pinniped (harbor seal and sea lion) predation is a limiting factor for Chinook in Puget Sound and along Washington’s outer coast and evaluate potential management actions.
Support authorization and other actions to more effectively manage pinniped predation of salmon in the Columbia River.
Reduce populations of nonnative predatory fish species that prey upon or compete with Chinook.
Monitor forage fish populations to inform decisions on harvest and management actions that provide for sufficient feedstocks to support increased abundance of Chinook.
Support the Puget Sound zooplankton sampling program as a Chinook and forage fish management tool.
Increased funding to expand monitoring of fishing