Sustut Weir Steelhead Index 19862001 - PowerPoint PPT Presentation

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Sustut Weir Steelhead Index 19862001

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Sustut Weir Steelhead Index 19862001 – PowerPoint PPT presentation

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Title: Sustut Weir Steelhead Index 19862001


1
Wild Steelhead Stock S


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BC 2004
2
British Columbia in Perspective
  • 1200 km (720 mi) south to north
  • 500-1000 km (300 600 mi) wide
  • 950,000 sq km (367,000 sq mi)
  • 75 mountains 60 forested
  • 10 farmland and lakes lt2 rivers
  • 7000 km (4200 mi) of coastline

3
Population Details
  • 4.0Million total
  • 60 Vancouver
  • 16 Vancouver Island
  • 24 elsewhere but only 4 in northern half
  • lt4 Aboriginal

4
B C (Wild) Steelhead Facts
  • About 580 steelhead rivers (3rd order or
    larger)
  • About 630 stocks (85 WSH, 12 ISSH, 3 CSSH)
  • About 1/3 of rivers along remote mid N coast
    (seldom, if ever, fished)
  • About 1/4 of rivers on Vancouver Island

5
Guesstimates of Abundance
6
Abundance (contd)
7
Hatcheries in Perspective
8
Number of Streams Stocked with Steelhead
Juveniles Originating From Wild Brood Stock

(Ffry, Ssmolt)
  • Time Island Mainland
    Thompson Cariboo Skeena All
    Period F S
    F S F S F S
    F S F S
  • lt 1975 1 3 2 2
    0 0 0 0 0
    0 3 5
  • 197584 11 15 14 8
    1 1 2 0 4 1
    32 25
  • 198594 19 17 18 19
    1 1 3 0 8 1
    49 38
  • 199501 11 10 6 14
    1 0 0 0 0 1
    18 25
  • 2002 9 9 0? 8
    0 0 0 0 0
    1 9 18

9
Steelhead Releases 1975 - 2001
  • Period Av Fry Av Smolts
  • 1975-79 .07M .07M
  • 1980-84 1.03M .60M
  • 1985-89 1.59M .91M
  • 1990-94 .73M .82M
  • 1995-99 .26M .63M
  • 2000-01 .09M .38M

10
Stock Assessment Methods
  • Total Counts
  • Weirs/resistivity counters (Keogh, Deadman,
    Sustut, Kitwanga)
  • Indices of Abundance
  • Gillnet test fisheries (Fraser, Skeena)
  • Fishwheels (Nass)
  • Snorkel observations (some total counts)
  • Aerial Counts (Chilko)
  • Juvenile sampling

11
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12
Nass River Watershed
13
Fishwheel Locations
14
Nass River Fishwheels
  • 6 wheels operated annually
  • Mainly for stock assessment
  • Late May to late September
  • Now operated as the sole in-season salmon
    indicator for the Nass

15
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16
Nass Steelhead Escapement (1994-2003)
17
Tyee Test Fishery Location
18
Tyee Test Fishing Site
19
Skeena Test Fishery Index 1956-2003
20
Tyee Test Fishery 2003
21
Upper Sustut River Watershed
22
Upper Sustut River Weir
23
Sustut Weir Counts
Estimated K 1100
24
Albion Test Fishery
25
Trends in Chilko
26
Deadman Creek Resistivity Counter
27
Trends in Deadman
28
Trends in Bonaparte
29
Trends in Nicola
30
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31
Central Coast Index Bella Coola
32
Lower Fraser CSSH Index
33
WILD STEELHEAD RETURNS TO THE KEOGH RIVER 1976
to 2003
34
Keogh River Steelhead Smolt counts, 1977 to 2003
  • The capacity for smolts dropped from 7,000
    (gt10,000 with nutrient addition) to lt2000
  • recent increases in smolts can be attributed to
    WRP

35
Smolt-to-adult survival trends
SAS has dropped from average of 15 to lt4 Like
wild coho, SAS increased in 97 and 98, but
recently declined based on returns thus far of
2001 smolts
2001 estimate based on partial returns.
36
Steelhead smolt yield and adult returns at the
Keogh River, B.C.
37
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38
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39
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40
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41
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42
Englishman River WSH Snorkel Counts 1982-2003
43
West Coast Van Isle WSH Index
44
Mainland Coast WSH Index
45
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46
In Summary
  • The red zone is not diminishing in size or
    severity
  • All the kings horses and all the kings men are
    not putting Humpty together again
  • Mother nature is a b_ _ _ _!
  • Fish culture in all its forms is not reversing
    anything
  • We arent fixing the broken habitat and
    diminished productivity on anywhere near a scale
    that will make a difference
  • Those who degraded the habitat are not held
    accountable
  • Fisheries managers are becoming as rare as
    steelhead

47
(Hopefully not) The End
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