Project 200007900: Assess Resident Fish Stocks of the Owyhee/Bruneau Basin on the Duck

Valley Indian Reservation

Mattie Allen, Shoshone Paiute Tribes

Duck Valley Indian Reservation

Coastal Rainbow Trout and Redband Trout Distributions

Redband Trout Distribution and Status in the Owyhee Subbasin

Past Activities in the East Fork Owyhee River Basin

Grazing Practices Hatchery Releases

• Hatchery coastal rainbow trout stocked over a period of several decades

•Riparian corridors remained unprotected despite heavy grazing pressure

Goal: Preserve native redband trout populations in East Fork Owyhee River and its tributaries.

Objectives

• Evaluate the genetic variation within and among putative native redband trout populations from 14 locations in the upper East Fork Owyhee River watershed

• Evaluate whether Fx progeny from events of introgression between hatchery rainbow trout and native redband trout or subsequent introgressed generations are present in 14 locations in the upper East Fork Owyhee River watershed

Location of Upper East Fork Owyhee River Collection Sites

Genetic Analyses

mtDNA

• Gene regions:

CytB and ND2

• Restriction enzymes:

Ava I, Dde I, Hae III

Dpn II, Hha I, Hinf I,

Mse I, Msp I, Rsa I,

Taq I,

Microsatellites

• Primers:

Omy 7

Omy 8

Omy 10

Omy 34

OMM 1020

Composite Mitochondrial Haplotype Frequencies for Putative Redband Trout Populations from Upper East Fork Owyhee River

Population I II III IV V VI

Fawn Creek, Upper (N=60) 0.65 0.35 0 0 0 0

Fawn Creek, Lower (N=60) 0.55 0.333 0.05 0.033 0.033 0

Highline Canal (N=15) 0.667 0.333 0 0 0 0

Jones Creek (N=27) 0.704 0.037 0.111 0.074 0.037 0.037

Miller Creek (N=44) 0.568 0.273 0.068 0.091 0 0

Reed Creek (N=14) 0.643 0.357 0 0 0 0

Sheep Creek (N=52) 0.462 0.385 0.077 0.058 0 0.019

Skull Creek, Upper (N=27) 0.667 0.259 0.074 0 0 0

Skull Creek, Lower (N=39) 0.641 0.256 0.103 0 0 0

Skull Creek, N.F. Lower (N=42) 0.619 0.357 0.024 0 0 0

Spring Creek (N=60) 0.6 0.317 0.017 0.017 0.05 0

Summit Creek (N=46) 0.478 0.261 0.152 0.022 0.087 0

Composite Mitochondrial Haplotypes

  I II III IV V

II 0.620

III 1.080 1.160

IV 2.130 1.770 1.590

V 1.560 1.900 1.770 1.320

VI 1.160 1.540 1.900 0.760 1.090

Percentage Sequence Divergence Among Observed mtDNA Haplotypes from the Upper East Fork

Owyhee River

01.02.0

II

I

III

IV

VI

V

Inferred Evolutionary Relationships Among mtDNA Haplotypes in the Upper East Fork Owyhee River

Percent Sequence Divergence

Composite Mitochondrial Haplotype Frequencies for Putative Redband Trout Populations from Upper East Fork Owyhee River

Population I II III IV V VI

Fawn Creek, Upper (N=60) 0.65 0.35 0 0 0 0

Fawn Creek, Lower (N=60) 0.55 0.333 0.05 0.033 0.033 0

Highline Canal (N=15) 0.667 0.333 0 0 0 0

Jones Creek (N=27) 0.704 0.037 0.111 0.074 0.037 0.037

Miller Creek (N=44) 0.568 0.273 0.068 0.091 0 0

Reed Creek (N=14) 0.643 0.357 0 0 0 0

Sheep Creek (N=52) 0.462 0.385 0.077 0.058 0 0.019

Skull Creek, Upper (N=27) 0.667 0.259 0.074 0 0 0

Skull Creek, Lower (N=39) 0.641 0.256 0.103 0 0 0

Skull Creek, N.F. Lower (N=42) 0.619 0.357 0.024 0 0 0

Spring Creek (N=60) 0.6 0.317 0.017 0.017 0.05 0

Summit Creek (N=46) 0.478 0.261 0.152 0.022 0.087 0

Composite Mitochondrial Haplotypes

Management Implications and Emerging Issues

?