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Comparison Of Standard And Environmental Dna Methods For Estimating Chinook Salmon Smolt Abundance In The Klamath River, California, Doyle Joseph Coyne
Comparison Of Standard And Environmental Dna Methods For Estimating Chinook Salmon Smolt Abundance In The Klamath River, California, Doyle Joseph Coyne
Cal Poly Humboldt theses and projects
Evaluating abundance of juvenile salmonids is critical to conservation and management. Current abundance estimation involves use of rotary screw traps and mark-recapture studies. Use of environmental DNA (eDNA) in water samples offers a noninvasive and less expensive approach that may potentially improve or eventually replace traditional monitoring. Here I evaluate the utility of eDNA to predict weekly abundance estimates of outmigrating Chinook salmon (Oncorhynchus tshawytscha) smolts in the Klamath River, California. A total of 15 water samples were collected per week over the 17-week smolt outmigration in both 2019 and 2020. Chinook salmon eDNA concentration in each water …
Seasonal Comparison Of Environmental Dna And Traditional Sampling Techniques For Detecting Coastal Tailed Frogs (Ascaphus Truei) In Northern California, Lauren Smith
Cal Poly Humboldt theses and projects
While environmental DNA (eDNA) sampling has been shown to provide higher detection rates for aquatic amphibians compared to traditional sampling, the effect of season and stream characteristics on the efficacy of eDNA sampling remains unclear. The pH, turbidity, water temperature, and flow rate of streams may affect eDNA concentrations, and consequently influence detection rate. The purpose of this research was to (1) compare the detection rates of eDNA and traditional sampling techniques during different seasons, (2) observe the effects of stream characteristics on eDNA concentrations, and (3) review the relationship between animal abundance and eDNA concentrations at specific sampling sites. …