Version 2.1.5 [2024-Jan-16]
Historical temperatures provided by CDEC. Redd and Carcass data provided by CDFW.
For more information, see the Version Details page, and the References - Notes - Data Disclaimer page.
New Content released January 16, 2024.
Temperature-Dependent Mortality (parameters are for °C temperatures)
Choose default calibration:
Pre-hatch egg: α = x 10- β = Post-hatch alevin: α = x 10- β = Choose default calibration:
α = Daily mortality rate: per °C above critical temperature. β = Critical temperature value °C.
(Jager 2011)
Eggs: TL: TU: kL: kU:
Alevin: TL: TU: kL: kU:
(Oppenheim 2014)
Threshold (USGS 2018a, Trinity/Klamath model) no longer available.
See References-Notes. |
Click to enlarge: |
: Target ATUs
°C days
(= 1724 °F days)
: Egg mass
mg. (Range: 100 - 400)
Days = 1 / e10.404 - 2.043*log(T°C + 7.575)
Days = 1 / e6.872 - log(T°C + 0.332)
Eggs per Redd (USGS,Trinity: 3000; Oppenheim,2014: 4925)
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SacPAS: Central Valley Prediction & Assessment of Salmon, University of Washington, Columbia Basin Research, www.cbr.washington.edu/sacramento/