Part of a series of articles titled The Midden - Great Basin National Park: Vol. 24, No. 2, Winter 2024.
Article • The Midden - Great Basin National Park: Vol. 24, No. 2, Winter 2024
Post-Fire Bonneville Cutthroat Trout Recovery in Strawberry Creek
This article was originally published in The Midden – Great Basin National Park: Vol. 24, No. 2, Winter 2024.

NPS/ P. Brannon
On August 8th, 2016, a wildfire broke out in Strawberry Creek, burning 2,790 acres (41%) of the drainage in Great Basin National Park (GRBA), 1,769 acres of BLM land, and 97 acres of private land equaling 4,656 total acres. The fire was especially severe in the riparian area of the creek, negatively affecting local vegetation, fish, and wildlife. To help salvage the remaining population, 251 Bonneville Cutthroat Trout (Oncorhynchus clarkii utah) (BCT) were captured, transported, and released into nearby Silver Creek. An additional 27 BCT were captured and released in the headwaters of Strawberry Creek above the burn perimeter. This recovery was performed within days after the fire due to BCT susceptibility to changes in water chemistry, increased stream siltation, and potential flash flooding.
Before the fire, Strawberry Creek was considered the park’s most productive BCT stream. During a population survey in 2011, BCT were present at 8 of 9 survey sites with an average population density of 755 fish per mile and a max density of 1,867 fish per mile. Immediately after the fire, a set of population and habitat surveys were conducted. Only 2 of 9 sites contained BCT with an average population density of 114 fish per mile and a max density of 805 fish per mile. This represents a 75% decrease in distribution and 85% decrease in population. The 2016 General Aquatic Wildlife Survey (GAWS) produced a Habitat Condition Index (HCI) score of 48.6, which showed a 22% decrease from the last survey taken in 2009 (HCI=62.0).


Our results and observations suggest that BCT populations are steadily increasing throughout Strawberry Creek and returning to areas that they occupied pre-fire. More evidence pointing towards successful recruitment include the observation of 7 young of year (YOY, <50mm) BCT as well as several juvenile fish (between 50 and 150mm). In 2024, BCT were present at 8/9 survey sites with an average population density of 511 fish per mile and a max density of 2,092 fish per mile. This is the highest estimate post-fire, and the second-highest estimate since we began Strawberry fisheries surveys in 2009.
Captured fish looked to be in good health. We primarily caught juvenile-adult fish ranging from 60-150 millimeters in length and 5-50 grams in weight, and we also observed multiple YOYs. The largest individual was seen at R3S1 weighing 300 grams with a total length of 293 millimeters (11.5 inches). Our smallest individual was seen at R2S4 weighing 0.45 grams with a total length of only 38 millimeters (1.5 inches).
Last updated: December 5, 2024