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Temperature and Westslope Cutthroat Trout Survival

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Species Common Name
Westslope Cutthroat Trout
Latin Name (Genus species)
Oncorhynchus lewisi
Stressor Name
Temperature
Specific Stressor Metric
Tank Temperature
Stressor Units
°C
Vital Rate (Process)
Survivorship

Life Stage

Detailed SR Function Description
Percent survival of juvenile westslope cutthroat trout (white circles, black line in image) in relation to test temperature during a 60-d experiment. Mean survival of westslope cutthroat trout declined significantly (P , 0.05) to 35.7% at 20C, 12.5% at 22C, and 0% at 24C.
In this laboratory experiment, Westslope cutthroat trout were either eggs or age-0 fish from a wild stock at Rogers Lake, Montana, or age-0 fish from wild stock maintained at the Westslope Trout Company, a private fish hatchery near Ronan, Montana. Both sources are derived from a mixture of pure populations of westslope cutthroat trout from Montana.

The survival rate is as follows:
Survival = 97.8846/1+e^-((temperature-24.3522)/-0.5033)
Function Derivation
laboratory experiment
Function Type
continuous
Stressor Scale
linear
Citation(s)
Bear, E. A., McMahon, T. E., & Zale, A. V. (2007). Comparative thermal requirements of westslope cutthroat trout and rainbow trout: implications for species interactions and development of thermal protection standards. Transactions of the American Fisheries Society, 136(4), 1116.
Citation Link
Bear et al.
File Upload
Excel file graphing the provided formula (426.36 KB)
Images
Fig 1 screenshot from Bear et al paper
Stressor Response csv data
Bear et al 1. Westslope cutthroat survival_0.csv (704 bytes)
Stressor (X) Mean System Capacity (%) SD low.limit up.limit
8 99.07679939 5.8 63.75 99.96
9 99.07679688 5.8 63.75 99.96
10 99.07678415 5.8 63.75 99.96
11 99.07671946 6.16 63.75 99.96
12 99.07639066 6.52 63.75 99.96
13 99.07471965 6.52 63.75 100
14 99.06622808 7.23 63.75 100
15 99.02309436 7.23 63.75 100
16 98.80445774 6.88 63.75 100
17 97.70805061 6.88 63.39 100
18 92.49185485 12.59 55.89 97.46
19 72.75272938 18.3 15.54 94.24
20 34.89967684 2.23 0.54 66.03
21 9.576574791 1.16 0 44.96
22 2.042933961 0.09 0 38.53
23 0.408745022 0.98 0 33.88
24 0.080693572 2.59 0 33.88
25 0.015887957 2.59 0 33.53
26 0.003126576 2.59 0 33.88
27 0.000615212 3.66 0 33.88
28 0.000121052 3.66 0 34.6

Stressor Response Chart