Restoration of a Threatened Species in a Fluvial Headwater - - PowerPoint PPT Presentation

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Restoration of a Threatened Species in a Fluvial Headwater - - PowerPoint PPT Presentation

Jan 30, 2024 146 likes •354 views

Lahontan Cutthroat Trout in the Upper Truckee River: Restoration of a Threatened Species in a Fluvial Headwater Environment Project Area N Expansion Area 2008 -2011: beginning of manual removal of brook trout in additional 10 miles stream

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Lahontan Cutthroat Trout in the Upper Truckee River: Restoration of a Threatened Species in a Fluvial Headwater Environment

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Project Area

Meiss Meadows

  • 1988-1990: rotenone to remove brook trout
  • early 1990s: LCT re-introduced & brook trout found
  • mid 1990s: manual removal of brook trout in

upper 5 miles stream & 8 acres lake

  • 2007-2009: no brook trout found, resting treatment
  • one of the only high meadow LCT populations

in Sierra Nevada

Expansion Area

  • 2008 -2011: beginning of manual removal of brook

trout in additional 10 miles stream

  • Future - 2023: continue implementation in streams

and begin removal of brook trout in 85 acres of lake N

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Project Area

Expansion Area Meiss Meadows

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Manual Removal Methods

  • Late August thru October
  • Delineated reaches by natural barriers

(low water barriers, falls, and beaver dams)

  • 3-pass depletion, on varying reach

lenght

  • Species identified and measured to

size class

  • Brook and Rainbow trout sacrificed
  • Speckled dace returned to upstream

reach

  • LCT returned upstream of Barrier

T1BA4 in RL trib and 36B in UTR; sacrificed below due to hybridization threats

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10 20 30 40 1 2 3 # of fish Pass

Depletion B34-B33 (254 m)

LCT BKT RBT 10 20 30 1 2 3 # of fish Pass

Depletion B37-B36A (307 m)

LCT BKT SPD

3 Pass Depletion

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SLIDE 6

Meiss Meadows

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SLIDE 7

2009 2007 2005 2003 2001 1999 1997

YEAR

500 1000 1500 2000

NUMBER OF FISH OBSERVED Adult Juveniles

Upper Truckee River 1996 - 2009

LCT in Meiss Meadows

1996-2009

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2009 2006 2003 2000 1997 1 . 5 2 . 5 3 . 5 4 . 5 5 . 5 6 . 5 7 . 5 8 . 5 9 . 5 1 . 5 1 1 . 5 Total Length (Inches) 50 100 150 200 250 300 Frequency

Brook Trout Catch in Meiss Meadows

1996-2009

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SLIDE 9

Expansion Area

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Accomplishment Summary

  • 2008
  • 0.8 miles treated
  • 3 passes completed
  • 230 brook trout removed
  • 213 speckled dace sampled
  • 194 LCT sampled
  • 2009
  • 1.1 miles treated
  • 2-3 passes completed
  • 100 brook trout removed
  • 353 speckled dace sampled
  • 369 LCT sampled
  • 2010
  • 5.8 miles treated
  • 1-3 pass completed
  • 9,252 brook trout removed
  • 82 rainbow trout removed
  • 211 speckled dace sampled
  • 509 LCT sampled

Round Lake

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SLIDE 11

2011

  • 3.6 miles treated
  • 1-3 passes completed
  • 729 brook trout removed
  • 27 rainbow trout removed
  • 337 speckled dace sampled
  • 820 LCT sampled

– 734 returned upstream of T1BA4 and 36B – 86 removed below T1BA4 and 36B

Round Lake Round Lake

Hybrids sampled in 2010 (thanks USFWS & M. Peacock!)

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Upper Truckee River

0-5cm 5-10cm 10-15cm 15-20cm 20-25cm 25-30cm 30+cm LCT 22 116 84 85 37 3 BKT 39 68 96 83 18 2 SPD 123 5 1 RBT 7 3 6 1 20 40 60 80 100 120 140 # of fish

Species

Rainbow trout LCT Speckled dace Brook trout

N

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SLIDE 13

Round Lake tributary

Round Lake

Species

Rainbow trout LCT Speckled dace Brook trout

0-5cm 5-10cm 10- 15cm 15- 20cm 20- 25cm 25- 30cm 30+cm LCT 52 196 153 54 12 BKT 29 86 162 122 24 SPD 162 46 RBT 9 1 20 40 60 80 100 120 140 160 180 200 # of fish

  • LCT had last been planted in Round Lake in 2008
  • CDFG surveyed Round Lake in summer 2010, and found only LCT and dace

N

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2011 Round Lake tributary

LCT BKT SPD RBT

2011: TOTAL FISH = 1,193

2010 Round Lake tributary

brook trout Lahontan cutthroat trout rainbow trout speckled dace

2011 UTR mainstem

LCT BKT SPD RBT

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Progress

Reach B41-B41A = the most upstream reach in the Expansion Area

1 2 3 4 5 6 7 8 9 10 BKT

Brook Trout B41-B41A

2008 2009 2010 2011 5 10 15 20 25 30 35

LCT B41-B41A

2008 2009 2010 2011

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UTR Fish Assessment

  • CTC, CalTrout, CDFG, UC Davis, City SLT
  • Late July and August
  • Survey mouth to headwaters of perennial

streams (where possible)

  • 1 pass electro-shocking
  • 100 meter reaches where possible
  • Record species and size class
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SLIDE 17

UTR Fish Assessment

Species Total bluegill 44 brook trout 6 brown bullhead 9 brown trout 1954 Lahontan cutthroat trout 2 Lahontan redside shiner 108 mountain sucker 119 mountain whitefish 12 Paiute sculpin 1613 rainbow trout 971 speckled dace 7528 Tahoe sucker 118 unknown sucker 37

bluegill brown bullhead brown trout Lahontan redside shiner mountain sucker Paiute sculpin rainbow trout speckled dace Tahoe sucker

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SLIDE 18

UTR Fish Assessment

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