Juvenile Monitoring

Summer 2018 salmon and steelhead snorkel counts

Sea Grant biologists conduct snorkel surveys each summer in order to document the presence and distribution of salmon and steelhead and to establish a minimum count of wild coho. This summer we counted nearly 5,000 wild coho young-of-the-year (yoy) and more than 20,000 steelhead yoy in all tributaries surveyed. Snorkel surveys were conducted in every second pool and expanded counts were generated by doubling the observed count. The table below lists the results by stream. 

snorkeler underwater
Sea Grant Fish Biologist Nick Bauer is ready to head off in search of juvenile fish

snorkeler in a stream
Sea Grant Fish Biologist Nick Bauer snorkels through a pool on Green Valley Creek, counting juvenile salmon and steelhead
juvenile coho salmon
Wild juvenile coho salmon on Felta Creek

Observed and expanded counts of wild coho salmon and steelhead trout young-of-the-year in Russian River tributaries: Summer 2018

Tributary 

Number of Pools Snorkeled 1

Coho Salmon yoy

Expanded Coho Salmon yoy

Steelhead yoy

Expanded Steelhead yoy

Willow Creek 99 982 1,964 94 188
Sheephouse Creek 92 49 98 66 132
Freezeout Creek 23 295 590 29 58
Austin Creek 130 22 44 1,088 2,176
- Kidd Creek 37 17 34 18 36
- East Austin Creek 136 1 2 3,200 6,400
 - - Black Rock Creek 25 41 82 148 296
 - - Gilliam Creek 36 32 64 326 652
   - - - Schoolhouse Creek 9 0 0 32 64
 - - Thompson Creek 17 0 0 95 190
 - - Gray Creek 95 361 722 692 1,384
 - - Devil Creek 23 0 0 78 156
- Ward Creek 42 0 0 922 1,844
Dutch Bill Creek 100 190 380 310 620
- Perenne Creek 10 3 6 13 26
- Grub Creek 7 1 2 0 0
Hulbert Creek 63 301 602 520 1,040
- Mission Creek 2 0 0 0 0 0
Green Valley Creek 83 883 1,766 752 1,504
- Purrington Creek 76 63 126 867 1,734
- Little Green Valley Creek 17 12 24 13 26
- Nutty Valley Creek 3 16 32 2 4
- Harrison Creek 3 8 16 0 0
Santa Rosa Creek 54 0 0 861 1,722
Mark West Creek 171 3 6 1,965 3,930
- Porter Creek (Mark West) 58 1 2 749 1498
Porter Creek 107 475 950 1,215 2,430
- Press Creek 8 0 0 13 26
Mill Creek 151 383 766 1,588 3,176
- Felta Creek 58 81 162 123 246
- Wallace Creek 28 0 0 181 362
- Palmer Creek 45 10 20 332 664
Crane Creek 22 0 0 94 188
Grape Creek 52 315 630 62 124
- Wine Creek 19 10 20 10 20
Pena Creek 103 19 38 3,445 6,890
- Pechaco Creek 23 0 0 56 112
- Woods Creek 59 312 624 203 406
 - - Dead Coyote Creek 11 0 0 0 0
Redwood Creek 39 26 52 115 230
- Yellowjacket Creek 32 0 0 36 72
Total   4,912 9,824 10,313 40,626

1 Number varies based on presence of wet pools in accessible stream length at time of survey.

2 All pools in reach dry at time of survey.