This book describes long-term trends in population density for Yellowstone cutthroat trout (YCT) in the upper Snake River watershed, Wyoming, USA. All YCT data were provided by the Wyoming Game and Fish Department. Our goals are to describe long-term trends in YCT population density using multiple datasets (mark-recapture population estimates, redd counts, and spawning population enumeration using a weir) and evaluate variation in trends among populations.
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.
Project team: Jeff Baldock and Annika Walters
Code
sessionInfo()
R version 4.4.3 (2025-02-28 ucrt)
Platform: x86_64-w64-mingw32/x64
Running under: Windows 11 x64 (build 22631)
Matrix products: default
locale:
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[2] LC_CTYPE=English_United States.utf8
[3] LC_MONETARY=English_United States.utf8
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.utf8
time zone: America/Denver
tzcode source: internal
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
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[9] knitr_1.48 jsonlite_1.8.9 xfun_0.49 digest_0.6.37
[13] rlang_1.1.4 evaluate_1.0.1
Source Code
# IntroductionThis book describes long-term trends in population density for Yellowstone cutthroat trout (YCT) in the upper Snake River watershed, Wyoming, USA. All YCT data were provided by the Wyoming Game and Fish Department. Our goals are to describe long-term trends in YCT population density using multiple datasets (mark-recapture population estimates, redd counts, and spawning population enumeration using a weir) and evaluate variation in trends among populations. *This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.*Project team: Jeff Baldock and Annika Walters------------------------------------------------------------------------<button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne">Session Information</button>:::: {#collapseOne .accordion-collapse .collapse}<div>```{r}sessionInfo()```</div>::::