SacPAS: Central Valley Prediction & Assessment of Salmon

UW Columbia Basin Research
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SacPAS Fish Model v.2.7.4:   Egg to Fry (Spawning to Emergence) and In-river Migration  

Beta version for testing and evaluation This model is in a development phase. Currently it works best with a modern browser.

WARNING: Certain functionality may not be available in older browsers.

The SacPAS fish modeling process begins with egg deposition at the time of spawning. Development rate and survival can be modeled by various methods to determine fry emergence from the gravel. On this page you can control temperature inputs, redd counts/timing/location and survival details for egg development modeling.

Developed by:
W. Nicholas Beer CBR,SAFS,UW

⇨  See the framework of web-accessible salmon models.
Skip egg to fry modeling and input fish directly into the migration model.

Temperature data inputs
Current year and forecasts
from NOAA CV-Temp
Historic (KWK to CCR):
Input or upload
Use SHINY Tool to create temps.

Units: Centigrade Farenheit

Winter Chinook redds based on:
 Carcass survey
 Aerial survey
Multi select OK.
Forecast at:
of redds

Input or upload

Survival: Redds to RBDD
Temperature effect only for method

Stage-dependent mortality
End crit. window ATUs (°C days)
Compute hatching
TCrit: °C = °F
δ (days): in critical window
bδ (rate): b(rate) applies to "Stage-dependent mortality" when mortality occurs in a critical window of time.

This is daily mortality rate when the critical temperature is exceeded, but only applies during the critical window period.

°C-1d-1 = °F-1d-1
Density effects per kilometer:
B (Base rate): (background max. survival)
D (Carry cap): per KM (averaged by reach).

Stage-independent mortality
TCrit: °C = °F
b (rate): b(rate) applies to "Stage-independent mortality". This mortality rate is applied on any day during the entire incubation period when the temperature goes above the critical temperature.
°C-1d-1 = °F-1d-1
Density effects: (Beverton-Holt)
Base rate: (background max. survival)
Carrying capacity: redds total.
 A Heat Map here.

 A Temperature Plot here.

Generate Query
strings only.

Run egg model.
Graphic output controls:
Plot days to

RKM range to
Temp range °C:

Redd dewatering (optional)
NONE Observed KWK flows   User's flows
RBDD configuration:Boards Out Boards In

User's flows Upload or Input

Units: CFS KCFS.

More controls and information below.
-- Results --

Results summary

-- Download Input report after run. --

-- All Details --

Summary results

Redd distribution

Pre-hatching exposure (mean)

Pre-hatching exposure (max)

All incubation exposure

Emergence timing

Hatch timing

Survivals to emergence

-- Download CSV file after run--


Summary results

Redd distribution

Pre-hatching exposure (mean)

Pre-hatching exposure (max)

All incubation exposure

Survivals to emergence

Egg to emergence timing model
Mechanistic (Beer and Anderson 1997): Egg mass mg.
Empirical (Jensen et al. 1999)
Power law (Beacham/Murray 1990) Days = e10.404 - 2.043*log(T°C + 7.575)
Linear (Zeug et al. 2012): Target ATUs degree C days.

Additional inputs
Eggs per Redd Oppenheim (2014)
-- Further information --

Day-of-year and Date or Day-of-Leap-year and Date Look-up locations

Redd and Temp formats, and other details, usage, etc.

Version details

"Using river temperature to optimize fish incubation
metabolism and survival (Anderson 2018) (PDF)"

Methods to compute time to hatching (PDF)

Methods to infer redds from carcass survey (PDF)

Methods to forecast redd distribution (PDF)

Methods to forecast dewatering mortality (PDF)

Temperature profile maker (SHINY)

Explore Egg/Fry survival models (SHINY)

View egg growth models comparison (PNG)

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SacPAS: Central Valley Prediction & Assessment of Salmon, University of Washington, Columbia Basin Research,

Tuesday, 18-Jan-2022 10:48:37 PST