Willow Creek Weir Trapping Summary 10/17/2015


Willow Creek Weir Trapping Summary Update 10/8/2015-10/14/2015


Total combined Chinook decreased from 114 to 65.

Total combined Steelhead increased from 110 to 331.

Chinook Coho Steelhead
Trap Grilse Adults Combined Grilse Adults Combined 1/2 lbers Adults Combined
Week Inclusive dates Days Total Ads Total Ads Total Ads Total RMs Total RMs Total RMs Total Ads Total Ads Total Ads
35 27-Aug —- 2-Sep 5 6 0 18 1 24 1 0 0 0 0 0 0 3 2 52 34 55 36
36 3-Sep 9-Sep 5 7 0 18 1 25 1 0 0 0 0 0 0 2 2 19 18 21 20
37 10-Sep 16-Sep 3 1 0 2 0 3 0 0 0 0 0 0 0 2 1 31 27 33 28
38 17-Sep 23-Sep 5 36 0 62 7 98 7 7 6 4 4 11 10 8 8 110 87 118 95
39 24-Sep 30-Sep 5 62 7 88 14 150 21 11 9 2 1 13 10 8 8 99 84 107 92
40 1-Oct 7-Oct 5 23 0 91 12 114 12 14 12 35 26 49 38 7 6 103 89 110 95
41 8-Oct 14-Oct 5 13 1 52 6 65 7 52 47 107 89 159 136 20 18 311 263 331 281
42 15-Oct 21-Oct 0 0 0 0 0 0
43 22-Oct 28-Oct 0 0 0 0 0 0
44 29-Oct 4-Nov 0 0 0 0 0 0
45 5-Nov 11-Nov 0 0 0 0 0 0
46 12-Nov 18-Nov 0 0 0 0 0 0
47 19-Nov 25-Nov
48 26-Nov 2-Dec
49 3-Dec 9-Dec
50 10-Dec 16-Dec
2015 Season Totals: 33 148 8 331 41 479 49 84 74 148 120 232 194 50 45 725 602 775 647
2014 Season Totals: 43 163 4 908 134 1,071 138 293 284 803 729 1,096 1,013 103 83 1,004 432 1,107 515

Notes:
1/ Summary based on real time unedited data. Not to be used for analysis.
2/ Provisionally, Chinook and coho grilse are < 56 cm, FL. Steelhead 3/ Ads denote adipose fin-clipped fish; RMs denote right maxillary clipped fish. Both clip counts are a subset of the total shown.
4/ Totals are for entire season.

1. The Willow Creek weir is designed to capture and estimate the population of spring Chinook salmon and is typically operated from June or early July (depending on river flow) through September. The weir is “fished” Sunday evening through Friday afternoon. The weir is not fished on weekends and afternoons to allow fish passage.
2. Fall Chinook, steelhead, coho and brown trout are also captured at Willow Creek weir. We do not attempt make population estimates for these species at Willow Creek weir.
3. Chinook salmon are tagged with a “spaghetti tag” which is pvc tubing placed behind the dorsal fin. Each tag has a number and is inscribed with CDFW address.
4. Brown trout and steelhead are tagged with a “floy” tag which is inserted below the dorsal fin. Floy tags are short pieces of tubing inserted into the side of the fish and are also inscribed with our address.

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