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Upper Flathead River system hybrid and rainbow trout suppression

Data Categories Fish Distribution
Dates of Data 2016 TO 2020
Data Set Status Complete
Data Set Update Schedule Annually
Date Data Set Published on StreamNet Data Store 11-22-2021
Project Name & Number 1991-019-03
Purpose of Data Set See Contract Summary.
Summary / Abstract This data set contains information collected from hybrid (westslope cutthroat trout x rainbow trout) and rainbow trout captured by trapping and jet boat-based electrofishing during spring of 2016 in the upper Flathead River system. Fish were captured in an ongoing suppression effort to stem the upstream spread of hybridization.
Broad Biological Groups Fishes
Taxa Oncorhynchus clarki lewisi
Oncorhynchus mykiss
Oncorhynchus hybrids
Location Flathead River, Montana
NPCC Subbasins (2001 Subbasins) Provincial (Mountain Columbia/Flathead)
Keywords Flathead River
rainbow trout
Lead Person and Organization That Created the Data Set Montana Fish, Wildlife and Parks (MFWP)
Other Participating Organizations Funding provided by Bonneville Power Administration
Contact Person for Questions About the Data Name:  Rick Hunt
Organization:  FWP
Address:  490 N Meridian Rd
Kalispell, MT  59901
Phone:  406-751-4572
Broad Category of Methods Field
Data Collection Methods Migrant traps were deployed in 2016 in three tributary streams of the Flathead River to capture upstream migrating trout (Abbot, Rabe, and Ivy). A migrant trap was deployed in Abbot Creek downstream of the barrier and about 75 m upstream of the confluence with the Mainstem Flathead River to capture hybrid and rainbow trout spawners. An additional trap was installed about 15 m above the confluence of Ivy Creek with the Mainstem. A third trap was placed in Rabe Creek about 100 m above the Mainstem confluence. Each trap was checked at least once per week and total length (mm), sexual maturity, and genetic samples (fin clips) were taken from all captured fish. Rainbow trout and hybrids were removed and transported to a community fishing pond (Pine Grove Pond) in Kalispell.

Spawning rainbow trout and hybrid fish were also captured near tributary mouths by electrofishing from an 18’ jet boat rigged with fixed-boom anodes during 2016. The Coffelt M22 rectifying unit produced straight DC at 3 to 5 amperes. Effort was concentrated in the Mainstem Flathead river within 50 m of the mouths of Abbot, Rabe, Ivy, Third creeks, and Sekokini Springs. Fish were also collected using backpack electrofishing units within some tributaries. All rainbow trout and hybrids captured were treated identically to trap-caught fish.
File Formats Microsoft Excel 2000 or later
Data structure description See data set files.
URL where updated data may be available
Some data sets are intrinsically linked to software, tools, models, or statistical procedures, and must be used in association in order to be of value. If this applies to this data set then the following information will apply:
Relationship between the data set and the software, model, etc. Microsoft Excel
Where the software, tools, models, etc. can be obtained if they are not included with the data download.
Contact person for questions about the software, tools, models, etc. Name:  

Papers, reports, and presentations that were done under this project. Steed, A., S. Bourret, L. Fried, M. Schnee, J. Deraleau, G. Michael, D. Belcer, R. Hunt, F. Ingelfinger, and M. Boyer. 2017. Annual Report of the Hungry Horse Mitigation Program, 1/1/2016 – 12/31/2016 Annual Report, 1991-019-03.
Restrictions or legal prerequisites for accessing and using this data set. No

File Size: 120 KB