2017 Lynn Canal (District 15) Commercial Drift Gillnet Fishery - - PowerPoint PPT Presentation

2017 Lynn Canal (District 15) Commercial Drift Gillnet Fishery Season Summary

Mark Sogge Area Management Biologist 2017 Drift Gillnet Task Force Meeting November 29, 2017 Ketchikan, Alaska

Summer Management Fall Management

• Stat. Week

Days Open Boats Boat Days Chinook Sockeye Coho Pink Chum 25 2 126 252 177 1,358 3 100 78,564 26 2(2) 169 676 357 2,623 32 3,791 350,356 27 4 169 676 332 1,743 123 28,655 498,579 28 4 152 608 140 759 122 18,807 219,518 29 2 106 212 87 6,077 68 42,823 194,024 30 2(1) 93 279 66 5,834 219 30,998 96,496 31 2 69 138 24 5,590 179 29,312 45,341 32 2 67 134 10 5,772 186 17,492 23,996 33 2 56 112 2,171 311 3,579 5,630 34 1(1) 51 102 4 1,985 136 2,219 3,101 35 3 55 165 2 4,034 1,746 12,673 7,767 36 3 54 162 5 812 2,725 748 14,049 37 3 76 228 1 767 8,278 52 15,667 38 2 63 126 164 7,870 2 12,942 39 2 56 112 24 5,481 6,541 40 2 38 76 3 2,311 2,468 41 Not Open Fishery Total: 42 218 4,058 1,205 39,716 29,790 191,251 1,575,039 2007-2016 Average: 52 198 4,839 1,073 139,371 39,454 224,018 1,076,203 2017 % of Average: 81% 110% 84% 112% 28% 76% 85% 146%

2017 District 15 Commercial Drift Gillnet Effort and Harvest

200,000 400,000 600,000 800,000 1,000,000 1,200,000 1,400,000 1,600,000

Chinook Sockeye Coho Pink Chum D-15 Drift Gillnet Harvest, 2017 vs. Previous 10-year Average

Number of Fish

2017 1,205 39,716 29,790 191,251 1,575,039 Average 1,073 139,371 39,454 224,018 1,076,203

500,000 1,000,000 1,500,000 2,000,000 2,500,000

60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 00 02 04 06 08 10 12 14 16

Number of Fish Year

Commercial Harvests of Pacific Salmon in District 15 1960-2017

Chinook Sockeye Coho Pink Chum

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$0 $2,000,000 $4,000,000 $6,000,000 $8,000,000 $10,000,000 $12,000,000 $14,000,000 $16,000,000 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Dollars Year

Lynn Canal Drift Gillnet Salmon Fishery Value, 1995-2017

Average $5,105,000 2017 $11,374,000

$0 $2,000,000 $4,000,000 $6,000,000 $8,000,000 $10,000,000 $12,000,000 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Dollars Year

Lynn Canal Drift Gillnet Fishery Value by Species, 2007-2017

Chum Sockeye Coho Pink Chinook

District 15 Chinook Conservation Actions

The 2017 preseason Inriver forecast was 694 large Chilkat River Chinook salmon. Goal is 1,850 — 3600 large Chinook Conservation measures implemented in District 15 fisheries in 2017

• Gillnet
• Section 15A
• Western half of 15A closed in 1st through 5th week (SW 25-29)
• Six inch maximum mesh restriction in 1st through 3rd week (SW 25-27)
• Night closures between 10:00pm and 4:00am in 1st through 3rd week (SW 25-27)
• Section 15C
• Limit time and area open to two days per week south of the latitude of Pt. Bridget with any extensions

limited to the “postage stamp” in 1st and 2nd weeks (SW 25-26)

• Six inch maximum mesh restriction in 1st and 2nd weeks (SW 25-26)
• Boat Harbor THA
• Limit the THA boundaries to one mile off the west shore
• Delay the 7 day a week fishery in the outside waters of the THA until at least the 4th week (SW 28),
• pening this area for a maximum of four days per week.
• Six inch maximum mesh restriction in 1st and 2nd weeks (SW 25-26)
• Sport
• Closed northern Chilkat Inlet and north of the ADF&G regulatory marker immediately north of Seduction Point

to king salmon sport fishing April 15 – July 15

• In Section 15-A, the waters of Lynn Canal north of the latitude of Sherman Rock were closed to king salmon

retention April 15 – December. 31.

• Subsistence
• Closed Chilkat Inlet to subsistence fishing through July 14
• Reduced Chilkat Inlet open area through July 28
• Limit the time allowed to subsistence fish in the Chilkat River to 4 days a week, June 15 and July 31.

218 unique permits fished D-15 in 2017. 1980-2016 average is 212. 2006-2016 average is 204.

50 100 150 200 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

Number of Boats Statistical Week

Number of Boats in the D-115 DGN Fishery, 2017

2017 Boats 10 YearAverage

1 2 3 4 5 100 200 300 400 500 600 700 800

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

Days Boat-Days Statistical Week

Days and Boat-days in the D-115 DGN Fishery, 2017

2017 Days Average Days 2017 Boat-Days Average Boat-Days

2017 days 42 Average days 52.2

1 2 3 4

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

Days Stat Week 2017 Section 15A Openings and Extensions

Opening Extension 10 year Avg

1 2 3 4 5

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

Days Stat Week 2017 Section 15C Openings and Extensions

Opening Extension 10 year Avg

2017 District 15 Gillnet Harvest by Sub-District

11510 Lower Lynn 11511 Boat Harbor 11531 Mid Lynn 11532 Chilkat Inlet 11533 Lutak 11534 Chilkoot Inlet 95% 5%

Chinook

66% 30% 3% 1%

Chum

52% 20% 14% 7% 1% 4%

Sockeye

54% 2% 21% 16% 7%

Coho

29% 56% 7% 2% 4% 2%

Pink

2017 District 15 Sockeye Harvest (based on Genetic Stock Identification)

Total sockeye = 39,716 28% of the 10-year average Chilkoot Lake = 1,986 (5% of Total) 3% of the 10-year average Chilkat Lake = 5,910 (15% of Total) 13% of the 10-year average Others = 31,820 (80% of Total) 113% the 10-year average

10 20 30 40 50 60 70 80 5,000 10,000 15,000 20,000 25,000 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

CPUE Harvest Statistical Week

2017 District 15 Weekly Sockeye Harvest and CPUE

2017 Harvest 10 Yr avg Harvest 2017 CPUE 10 Yr avg CPUE

1000 2000 3000 4000 5000 6000 7000 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Number of Fish Statistical Week

2017 District 15 Sockeye Harvest by Stock (Genetic Stock Identification)

Speel/Snett Taku/Stikine Chilkat Lake NSEAK Chilkoot Chilkat Main

Total Harvest by Stock Speel/Snettisham 16,718 Taku/Stikine 10,777 Chilkat Lake 5,910 Northern SE 4,093 Chilkoot Lake 1,986 Chilkat Mainstem 222

2,000 4,000 6,000 8,000 10,000 12,000 14,000 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

Number o Fish Statistical Week

Chilkoot Lake Sockeye Weir Counts

2017 07-16 Average

10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

Number of Fish Statistical Week

Cumulative Chilkoot Lake Sockeye Weir Counts

2017 07-16 Average

10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000 100,000 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Number of Fish Statistical Week

2017 Chilkoot Weir Counts Compared to Escapement Goals

Lower Bound Goal Upper Bound Goal 2017 Cumulative Escapement Lower Bound 38,000 Upper Bound 86,000 Escapement 43,098

2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

Number of Fish Statistical Week

Chilkat Lake DIDSON Counts

2017 2008-2016 DIDSON Average 20,000 40,000 60,000 80,000 100,000 120,000 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

Number of Fish Statistical Week

Chilkat Lake DIDSON Cumulative Counts

2017 2008-2016 DIDSON Average

0.00 20,000.00 40,000.00 60,000.00 80,000.00 100,000.00 120,000.00 140,000.00 160,000.00 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

Number of Fsh Statistical Week

2017 Chilkat Weir DIDSON Count and Escapement Goals

Lower Bound Goal Upper Bound Goal 2017 Lower Bound 70,000 Upper Goal 150,000 Escapement 88,197

2017 District 15 Chum Harvest Summer Chum Harvest = 1,512,504 (1.4 times the 10-year average, 1.5 times the 2016 harvest) Fall Chum Harvest = 62,535 (99% of the 10-year average) Total Chum Harvest = 1,575,039 (1.5 times the 10-year average)

100 200 300 400 500 600 700 800 900 1,000 100,000 200,000 300,000 400,000 500,000 600,000

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

CPUE Harvest Statistical Week

2017 District 15 Weekly Chum Harvest and CPUE

2017 Harvest 10 Yr avg Harvest 2017 CPUE 10 Yr avg CPUE

1 1 1 1 50 100 150 200 250 300 350 400

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

CPUE Harvest Statistical Week

2017 District 15 Weekly Chinook Harvest and CPUE

2017 Harvest 10 Yr avg Harvest 2017 CPUE 10 Yr avg CPUE

Total Harvest 1,205 Section 15 A 8 Section 15C 1,197

10 20 30 40 50 60 70

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

Harvest Statistical Week

2017 Section 15A Weekly Chinook Harvest

2017 Harvest 10 Yr avg Harvest

50 100 150 200 250 300 350 400

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

Harvest Statistical Week

2017 Section 15C Weekly Chinook Harvest

2017 Harvest 10 Yr avg Harvest

1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Number of Fish Year

Chilkat River Chinook Inriver Abundance (age 1.3+), 1991-2017

Inriver Abundance Upper Goal Lower Goal

Lower Goal 1,850 Upper Goal 3,600 Abundance 1,173

The 2017 inriver forecast was for a return of 634 large Chilkat Chinook salmon. The 2018 Inriver Abundance forecast for Chilkat Chinook salmon is 928 large (age 1.3+ ) fish.

10 20 30 40 50 60 70 2,000 4,000 6,000 8,000 10,000

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

CPUE Harvest Statistical Week

2017 District 15 Weekly Coho Harvest and CPUE

2017 Harvest 10 Yr avg Harvest 2017 CPUE 10 Yr avg CPUE Total Harvest 29,790

50 100 150 200 250 10,000 20,000 30,000 40,000 50,000

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

CPUE Harvest Statistical Week

2017 District 15 Weekly Pink Harvest and CPUE

2017 Harvest 10 Yr avg Harvest 2017 CPUE 10 Yr avg CPUE Total Harvest 191,251

50,000 100,000 150,000 200,000 250,000 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Number of Fish Year

Chilkat River Coho Salmon Escapement, 1998-2017

Escapement Lower Goal Upper Goal

Lower Goal 30,000 Upper Goal 70,000 Escapement 34,742

5,000 10,000 15,000 20,000 25,000 30,000 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Number of Fish Year

Berners River Coho Salmon Counts, 1998-2017

Survey Count Lower Goal Upper Goal

Lower Goal 4,000 Upper Goal 9,200 Count 7,040

Chilkat and Klehini River Chum Salmon

• Below average return to the Klehini River and Chilkat River spawning

areas.

• Total 2017 Chum Escapement estimated to be 128,500 fish.

100,000 200,000 300,000 400,000 500,000 600,000 700,000 800,000 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Number of Fish Year

Chilkat River Drainage Fall Chum Escapement and Harvest 1999-2017

Escapement Harvest Lower Goal Upper Goal

Lower Goal 75,000 Upper Goal 250,000

2018 Projection

Chilkat Lake Sockeye – Average Return Strength for 2018

• Parental year escapements were near the midpoint of the goal range in 2012 and 2013 (brood years for 2017 return).
• Total zooplankton levels were well above average of 172,633 organisms/m² in Chilkat Lake for rearing fry in 2013 through

2015, the years when sockeye salmon returning in 2018 were rearing in the lake. Age 2.3 fish reared in the lake in 2013 and 2014. Age 2.2 fish reared in 2014 and 2015, and age 1.3 fish reared in 2014.

• The proportion of age-2.2 fish in the 2017 escapement was 9%, well below average (24%). The escapement in the

parent year (2012) for this cohort was good (122,000), but the low proportion of the age-2.2 fish could indicate a below average return of age-2.3 fish in 2018. This could be balanced by a stronger return of age 1.3 and age 2.2 fish returning from the 2013 escapement ((116,000). 50,000 100,000 150,000 200,000 250,000 300,000 350,000 400,000 450,000

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

Organisms/m2 Year

Chilkat Lake Total Zooplankton Density 1998-2016

Total Copepod Cladoceran 20000 40000 60000 80000 100000 120000 140000 160000 180000 200000

1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Number of Fish Year

Chilkat Lake Escapement , 1999-2017

Escapement Lower Goal Upper Goal

2018 Projection

Chilkoot Lake Sockeye – Average Return Strength for 2018

• An average of 71% of the Chilkoot sockeye are age-1.3 fish, and for the 2018 return these will have

spawned in 2013.

• 2013 weir count of 46,329 sockeye was within the goal range of 38,000 - 86,000 fish.
• Lake productivity in 2014 (zooplankton density and rearing smolt density) increased, indicating

improved rearing conditions for fry present in the lake. This could result in an increase in the return per spawner for fry rearing in that year.

20,000 40,000 60,000 80,000 100,000 120,000 140,000 160,000 200,000 400,000 600,000 800,000 1,000,000 1,200,000 1,400,000 1,600,000 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015

Zooplankton Desity (#org./M2) Number of Presmolt Year

Chilkoot Lake Hydroacoustic Presmolt Estimate and Zooplankton Density, 1995-2016

Hydroacoustic Presmolt Estimate Zooplankton Density

20000 40000 60000 80000 100000 120000 140000 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016

Number of Fish Year

Chilkoot Lake Escapement, 1998-2017

Escapement Lower Goal Upper Goal

Questions?