Salmon Snapshots

San Lorenzo River

2014/15 Population

Estimate of Ocean Returning Fish

Coho

Oncorhynchus kisutch

Steelhead

Oncorhynchus mykiss

What We Have  
25
188
What We Need  
3,800
3,200
Notes:

Population estimates (derived from redd counts) are provided by California Department of Fish and Wildlife. No coho salmon redds observed although three coho salmon were observed. The California Coastal Salmonid Monitoring Program for San Lorenzo River initiated in 2010/11. The 95th % confidence interval is 1 to 49 for coho and 76 to 400 for steelhead. Monitoring ended prior to end of steelhead migration. Thus, accurate estimates could not be determined. Sample size too small to make population estimates at watershed scale. Sample size was set for the regional scale. Data are preliminary and subject to change.

Coho salmon are federally listed as endangered. 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 2012, NMFS 2016).

The 2014/15 snapshot is defined as fall 2014 to spring 2015, as per when salmon and steelhead return from the ocean to spawn. Fall Chinook spawning season is fall 2014. Coho season is fall through early January 2015. Steelhead season can start in fall 2014 but is primarily winter and spring 2015. Spring Chinook return in spring 2015 and spawn in fall 2015.

References

National Marine Fisheries Service. 2012. Final Recovery Plan for Central California Coast Coho Salmon Evolutionarily Significant Unit. National Marine Fisheries Service, Southwest Region, Santa Rosa, California.

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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