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 Migratory Patterns of Rainbow Trout and Chinook Salmon in the Saugeen River Watershed

 

The main objective of this study was to provide valuable baseline data to identify migration corridors, spawning areas and potential barriers to upstream and downstream migration in the Saugeen River watershed, with a focus on the impacts of the Truax Dam in Walkerton, Ontario. These data will be used for comparisons and assessments of future restoration and conservation initiatives designed to enhance fish production in the Saugeen River. Fifty Rainbow Trout were captured at the Denny's Dam fishway in Southampton and implanted with coded radio transmitters in April 2018.  Fifty additional Chinook Salmon will be tagged and tracked in the fall of 2018. Individual fish locations will be determined using mobile telemetry, fixed tracking stations, and aerial telemetry surveys for several years along the river and its tributaries.

 

Preliminary Results

  • 34 % passed Truax Dam  - 82 km upstream (17 fish)

  • 28 % passed Carrick Dam - 85 km upstream (14 fish)

  • 8 % passed Maple Hill Dam - 96 km upstream (4 fish)

  • 26 % of fish were detected in close proximity to or immediately downstream of the Truax Dam, but did not pass upstream

Location Date Discharge (m3/s)
Truax Passage April 27 - May 5 74-182, avg. 144.18
Carrick Passage April 30 - May 11 40.1-149, avg. 79.89
Maple Hill Passage May 1 - May 9 44.8-72, avg. 63.78

 

 

 

 
 

Table 1: Vital statistics of Rainbow Trout captured and implanted with radio transmitters in 2018

 

Tx CODE   FLOY TAG  TL (MM) WEIGHT (KG) SEX HATCHERY
1 2000 677 3.35 F Y
2 2001 570 1.99 M N
3 2002 624 2.45 M N
4 2003 684 3.69 F N
5 2004 636 2.88 F N
6 2005 619 2.79 F N
7 2006 716 2.78 M Y
8 2007 735 3.46 M N
9 2008 722 4.90 F Y
10 2009 727 3.21 M N
11 2010 691 3.10 M Y
12 2011 721 3.84 F N
13 2012 598 2.35 F Y
14 2013 704 2.98 M N
15 2014 741 3.30 F Y
16 2015 620 2.66 F Y
17 2016 588 1.86 F N
18 2017 703 3.48 F Y
19 2018 616 2.17 F N
20 2019 734 3.96 M Y
21 2020 571 2.00 F Y
22 2021 675 2.88 F N
23 2022 686 3.40 M Y
24 2024 612 2.78 F Y
25 2025 662 3.50 F N
26 2026 690 3.57 F N
27 2027 596 2.67 M N
28 2028 599 2.10 M Y
29 2029 542 1.42 M N
30 2030 663 2.41 M N
31 2031 681 2.92 M N
32 2032 726 4.37 F Y
33 2033 682 3.15 M Y
34 2034 728 3.80 M Y
35 2035 665 2.69 F N
36 2036 640 2.64 M Y
37 2037 622 2.95 F Y
38 2038 644 3.23 F Y
39 2049 608 2.30 M Y
40 2040 706 3.01 M N
41 2041 768 3.49 M Y
42 2042 524 1.39 M N
43 2043 677 2.95 M N
44 2044 735 3.46 M Y
45 2045 615 2.24 M Y
46 2046 649 2.41 M N
47 2047 656 2.78 M N
48 2048 702 3.29 M Y
49 2049 690 3.37 M N
50 2050 656 2.98 M Y

 

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Funding support for this project was provided by:


 

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