Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in the Southeastern District Mainland, Alaska

Peninsula Management Area, 2010-2012

Tyler H. Dann, Mark J. Witteveen, Serena D. Rogers Olive, Christopher Habicht, Matthew B. Foster, Heather

L. Liller, and William D. Templin RC 7, Tab X 1

Background • SEDM during WASSIP years (2006-2008)

– Small Chignik runs -> Fishery closures -> limited opportunities for genetic stock composition estimates

• Precipitated continuation of fishery sampling – 2010 Area M Board of Fisheries meeting – Paired commercial and test fishery sampling in case of

similar fishery closures • Experimental design:

– 3 sections of SEDM – 3 temporal strata – 3 years: 2010-2012 – Sample both test and commercial fisheries

2

Background • SEDM during WASSIP years (2006-2008)

– Small Chignik runs -> Fishery closures -> limited opportunities for genetic stock composition estimates

• Precipitated continuation of fishery sampling – 2010 Area M Board of Fisheries meeting – Paired commercial and test fishery sampling in case of

similar fishery closures • Experimental design:

– 3 sections of SEDM – 3 temporal strata – 3 years: 2010-2012 – Sample both test and commercial fisheries

2

Background • SEDM during WASSIP years (2006-2008)

– Small Chignik runs -> Fishery closures -> limited opportunities for genetic stock composition estimates

• Precipitated continuation of fishery sampling – 2010 Area M Board of Fisheries meeting – Paired commercial and test fishery sampling in case of

similar fishery closures • Experimental design:

– 3 sections of SEDM – 3 temporal strata – 3 years: 2010-2012 – Sample both test and commercial fisheries

2

3

4

Management Plan

• Relation to Chignik sockeye salmon abundance – SEDM can open when the harvestable surplus of

Chignik runs are expected to exceed 600,000, the run appears strong as predicted and escapement goals are met (or other scenarios < 600,000)

– Number of harvested fish in SEDM destined for Chignik River should approach as near as possible 7.6% of the CMA harvest

– During June, 80% of SEDM harvests assumed destined for Chignik River (historical tagging study)

– June 26 – July 8 overlap period, fishing restricted – In July, Chignik contribution differs by section

5

Management Plan

• Relation to Chignik sockeye salmon abundance – SEDM can open when the harvestable surplus of

Chignik runs are expected to exceed 600,000, the run appears strong as predicted and escapement goals are met (or other scenarios < 600,000)

– Number of harvested fish in SEDM destined for Chignik River should approach as near as possible 7.6% of the CMA harvest

– During June, 80% of SEDM harvests assumed destined for Chignik River (historical tagging study)

– June 26 – July 8 overlap period, fishing restricted – In July, Chignik contribution differs by section

5

Management Plan

• Relation to Chignik sockeye salmon abundance – SEDM can open when the harvestable surplus of

Chignik runs are expected to exceed 600,000, the run appears strong as predicted and escapement goals are met (or other scenarios < 600,000)

– Number of harvested fish in SEDM destined for Chignik River should approach as near as possible 7.6% of the CMA harvest

– During June, 80% of SEDM harvests assumed destined for Chignik River (historical tagging study)

– June 26 – July 8 overlap period, fishing restricted – In July, Chignik contribution differs by section

5

Management Plan

• Relation to Chignik sockeye salmon abundance – SEDM can open when the harvestable surplus of

Chignik runs are expected to exceed 600,000, the run appears strong as predicted and escapement goals are met (or other scenarios < 600,000)

– Number of harvested fish in SEDM destined for Chignik River should approach as near as possible 7.6% of the CMA harvest

– During June, 80% of SEDM harvests assumed destined for Chignik River (historical tagging study)

– June 26 – July 8 overlap period, fishing restricted – In July, Chignik contribution differs by section

5

Management Plan

• Relation to Chignik sockeye salmon abundance – SEDM can open when the harvestable surplus of

Chignik runs are expected to exceed 600,000, the run appears strong as predicted and escapement goals are met (or other scenarios < 600,000)

– Number of harvested fish in SEDM destined for Chignik River should approach as near as possible 7.6% of the CMA harvest

– During June, 80% of SEDM harvests assumed destined for Chignik River (historical tagging study)

– June 26 – July 8 overlap period, fishing restricted – In July, Chignik contribution differs by section

5

Management Plan

• Relation to Chignik sockeye salmon abundance – SEDM can open when the harvestable surplus of

Chignik runs are expected to exceed 600,000, the run appears strong as predicted and escapement goals are met (or other scenarios < 600,000)

– Number of harvested fish in SEDM destined for Chignik River should approach as near as possible 7.6% of the CMA harvest

– During June, 80% of SEDM harvests assumed destined for Chignik River (historical tagging study)

– June 26 – July 8 overlap period, fishing restricted – In July, Chignik contribution differs by section

5

East Stepovak and Stepovak Flats sections

6

East Stepovak and Stepovak Flats sections

6

Perc

ent o

f cat

ch

020

4060

8010

0

Regulatory allocation

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Northwest Stepovak Section – June

7

Perc

ent o

f cat

ch

020

4060

8010

0

Regulatory allocation

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Northwest Stepovak Section – July

8

Perc

ent o

f cat

ch

020

4060

8010

0

Regulatory allocation

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Southwest Stepovak, Balboa Bay and Beaver Bay sections

9

Perc

ent o

f cat

ch

020

4060

8010

0

Regulatory allocation

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

East Stepovak and Stepovak Flats sections

10

Perc

ent o

f cat

ch0

2550

7510

00

2550

7510

00

2550

7510

0

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

East Stepovak and Stepovak Flats sections

10

Perc

ent o

f cat

ch0

2550

7510

02010June 1-25

025

5075

100

025

5075

100

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

East Stepovak and Stepovak Flats sections

10

Perc

ent o

f cat

ch0

2550

7510

02010June 1-25July 9-25

025

5075

100

2011June 1-25June 26-July 8July 9-25

025

5075

100

2012June 1-25June 26-July 8July 9-25

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

Num

ber o

f fis

h ha

rves

ted

(thou

sand

s)0

1020

3040

2010June 1-25July 9-25

010

2030

40

2011June 1-25June 26-July 8July 9-25

010

2030

40

2012June 1-25June 26-July 8July 9-25

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

11

East Stepovak and Stepovak Flats sections

Northwest Stepovak Section

12

Perc

ent o

f cat

ch0

2550

7510

02010June 1-25

025

5075

100

2011June 1-25June 26-July 8

025

5075

100

2012June 1-25June 26-July 8

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

Num

ber o

f fis

h ha

rves

ted

(thou

sand

s)0

510

1520

252010June 1-25

05

1015

2025

2011June 1-25June 26-July 8

05

1015

2025

2012June 1-25June 26-July 8

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

Northwest Stepovak Section

13

Southwest Stepovak, Balboa Bay and Beaver Bay sections

14

Perc

ent o

f cat

ch0

2550

7510

02010June 1-25July 9-25

025

5075

100

2011June 1-25June 26-July 8July 9-25

025

5075

100

2012June 1-25June 26-July 8July 9-25

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

Num

ber o

f fis

h ha

rves

ted

(thou

sand

s)0

1020

302010June 1-25July 9-25

010

2030

2011June 1-25June 26-July 8July 9-25

010

2030

2012June 1-25June 26-July 8July 9-25

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

Southwest Stepovak, Balboa Bay and Beaver Bay sections

15

Southeastern District Mainland

16 Note: experimental design did not mirror management plan.

Perc

ent o

f SED

M h

arve

st0

2550

7510

0201020112012

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

Southeastern District Mainland

16 Note: experimental design did not mirror management plan.

Perc

ent o

f SED

M h

arve

st0

2550

7510

0201020112012

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

Num

ber o

f fis

h ha

rves

ted

(thou

sand

s)0

3570

105

140

201020112012

NortonSound

KuskokwimBay

BristolBay

NorthPeninsula

SouthPeninsula

Chignik East ofWASSIP

Orzinski Non-OrzinskiSouth Peninsula

BlackLake

ChignikLake

Regional Reporting Group Subregional Reporting Group

Southeastern District Mainland

Southeastern District Mainland

17 Note: experimental design did not mirror management plan.

All results publically available

Collaborative project funded by the State of Alaska and Aleutians East Borough.

http://www.adfg.alaska.gov/sf/publications/

Google: SEDM genetic stock composition

18

Questions

19