Salmon Snapshots

Redwood Creek (Humboldt County)

2015/16 Population

Estimate of Ocean Returning Fish

Coho

Oncorhynchus kisutch

Chinook

Oncorhynchus tshawytscha

Steelhead

Oncorhynchus mykiss

What We Have  
206 redds
740 redds
unknown
What We Need  
4,900
3,400
5,800
Notes:

Estimate of the number of spawning fish nests (called redds) provided by the California Department of Fish and Wildlife. Population estimates of the number of fish will be based on these redd estimates. The California Coastal Salmonid Monitoring Program for Redwood Creek initiated in 2008/09. The 95th % confidence interval is 145 redds to 313 redds for coho and 427 redds to 1,200 redds for fall chinook. Monitoring ended prior to end of steelhead migration; accurate estimates could not be determined. Data are preliminary and subject to change.

Coho, Chinook and steelhead are federally listed as threatened. The “What We Need” spawner population abundance targets shown above represent just one of several criteria that the National Marine Fisheries Service considers when determining whether a species should be removed from the Federal List of Endangered and Threatened Wildlife and Plants (50 CFR 223.102). Recovering any of the species entails meeting criteria for abundance, productivity, diversity, and spatial structure across multiple watersheds, as well as criteria for alleviating threats (NMFS 2014, NMFS 2016). Steelhead adult spawning target is sum of 3,200 spawners for Lower Redwood Creek population and 2,600 spawners for Upper Redwood Creek population.

The 2015/16 snapshot is defined as fall 2015 to spring 2016, as per when salmon and steelhead return from the ocean to spawn. Fall Chinook spawning season is fall 2015. Coho season is fall through early January 2016. Steelhead season can start in fall 2015 but is primarily winter and spring 2016.  
 

References

National Marine Fisheries Service. 2014. Final Recovery Plan for the Southern Oregon Northern California Coast Evolutionarily Significant Unit of Coho Salmon (Oncorhynchus kisutch). September 2014.

National Marine Fisheries Service. 2016. Final Coastal Multispecies Recovery Plan. National Marine Fisheries Service, West Coast Region, Santa Rosa, California.

 

fish images © Joe Tomelleri

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