Five of the six native Lahontan cutthroat trout (Oncorhynchus
clarki henshawi)populations in Oregon exist in the Coyote
Lakes basin of southeast Harney County. The major drainages
in the Coyote Lakes Basin are Willow and Whitehorse Creeks. Both
drainages originate on the north slope of Trout Creek Mountain,
terminate in the dry Coyote lake bed and are currently isolated from
each other or any other basin. Populations of Lahontan cutthroat in
Willow and Whitehorse Creeks have been protected under the ESA as a
threatened species since 1991 and are also listed as threatened under
State of Oregon statute.
Along with changes in management and land use
activities, the federal recovery plan for Lahontan cutthroat trout
requires the assessment of habitat conditions and population abundance
at five year intervals. Population monitoring
of cutthroat in Willow and Whitehorse creeks was initiated in 1985 and
has occurred on a five year interval since then.
In 2005 the Native Fish
Investigations Project continued population monitoring by obtaining an
estimate of Lahontan cutthroat trout in Willow Creek and Whitehorse
Creek, and tested the application of the EMAP sampling design to obtain this estimate. Additionally, we determined
distribution of cutthroat trout in tributaries where presence was
suspected but not verified, and monitored changes in distribution of the Antelope
Annual Reports and Publications:
Gunckel, S.L., and S.E. Jacobs. 2006.
Population Assessment of Lahontan Cutthroat Trout, 2005.
Oregon Department of Fish and Wildlife, Annual Progress Report,
Fish Research Project E-2-38, Salem.
Oregon Native Fish Status Report (2005)
Jones, K.K., J.M. Dambacher, B.G. Lovatt, A.G. Talabere and W. Bowers . 1998.
Status of Lahontan cutthroat trout in the Coyote Lake Basin, southeast Oregon. North
American Journal of Fisheries Management 18:308-317.