Structure Exchanges – Committee of Age Reading Experts

CARE members participate in structure exchanges in order to better understand the ageing process and to compare alternate interpretations of growth patterns. Exchanges can be done for training purposes (a group that is beginning to age a new species can request structure exchanges from a group that has experience with that particular species) or in order to calibrate ages between two experienced ageing groups.

Refer to the CARE Charter for structure exchange protocols (PDF).

Click here for the structure exchange CASE invoice (Excel).

In the table below, you’ll find a list of CARE exchanges dating back to 1998 with links to the results, if available.

To calculate precision statistics between two age readers, use this spreadsheet. Just enter the ages into the two columns on the first tab, and the other tabs will show the results. For calculating the precision of multiple readers (up to six), use this spreadsheet.

Exchange ID	Exchange Year	Species	Stock	Originating Agency	Coordinator	Cooperators
23-005	2023	Rougheye/ Blackspotted rockfish	Alaska	ADFG	Josh Dore	AFSC, NWFSC
23-004	2023	Rougheye/ Blackspotted rockfish	Alaska	AFSC	John Brogan	ADFG, WDFW, NWFSC
23-003	2023	Rougheye/ Blackspotted rockfish	US West Coast	NWFSC-PSMFC	Patrick McDonald	AFSC, WDFW, ADFG
23-002	2023	Rougheye/ Blackspotted rockfish	Washington	WDFW	Andrew Claiborne	AFSC, NWFSC, ADFG
23-001	2023	Rougheye/ Blackspotted rockfish	Alaska	ADFG	Josh Dore	AFSC, WDFW, NWFSC
22-014	2022	Canary rockfish	Washington	WDFW	Andrew Claiborne	NWFSC
22-013	2022	Canary rockfish	West Coast	NWFSC	Patrick McDonald	WDFW
22-012	2022	Petrale sole	West Coast	NWFSC	Patrick McDonald	WDFW
22-011	2022	Petrale sole	Washington	WDFW	Andrew Claiborne	NWFSC
22-010	2022	Lingcod	West Coast	AFSC	Brenna Groom	ADFG -Homer
22-009	2022	Sablefish	Alaska	AFSC	John Brogan	ADFG, CDFO, NWFSC
22-008	2022	Black rockfish	California	NWFSC	Patrick McDonald	ADFG, WDFW, ODFW
22-007	2022	Black rockfish	Oregon	ODFW	Mark Terwilliger	ADFG, WDFW, NWFSC
22-006	2022	Black rockfish	Washington	WDFW	Andrew Claiborne	ADFG, ODFW, NWFSC
22-005	2022	Black rockfish	Alaska	ADFG	Chris Hinds	WDFW, NWFSC,ODFW
22-004	2022	Rougheye rockfish	West Coast	NWFSC-PSMFC	Betty Kamikawa	AFSC
22-003	2022	Rougheye rockfish	Alaska	AFSC	Chris Gburski	NWFSC-PSMFC
22-002	2022	Yelloweye rockfish	Alaska	ADFG	Catherine Mattson	Jessica Randall University of Melbourne
22-001	2022	Black rockfish	Alaska	ADFG	Kevin McNeel	ADFG
21-002	2021	Black rockfish	Sitka	ADFG	Kevin McNeel	ADFG
21-001	2021	Pacific hake	Canada	CDFO	Audrey Ty	NWFSC-PSMFC
20-010	2020	Vermillion rockfish	Oregon	ODFW	Mark Terwilliger	NWFSC, WDFW, SWFSC
20-009	2020	Vermillion rockfish	CA S. Pt. Conception	NWFSC-PSMFC	Patrick McDonald	WDFW, SWFSC, ODFW
20-008	2020	Vermillion rockfish	CA North Pt. Conception	SWFSC	Melissa Monk	WDFW, NWFSC, ODFW
20-007	2020	Vermillion rockfish	WA Coast	WDFW	Jenny Topping	NWFSC, ODFW, SWFSC
20-006	2020	Yelloweye rockfish	Alaska	ADF&G- Homer	Elisa Russ	ADF&G - Juneau
20-005	2020	Rougheye rockfish	Gulf of Alaska	AFSC	Chris Gburski	ADF&G - Juneau
20-004	2020	Rougheye rockfish	Alaska	ADF&G - Juneau	Cathy Mattson	AFSC
20-003	2020	Sablefish	Gulf of Alaska	AFSC	Delsa Anderl	ADFG-Juneau, NWFSC, DFO
20-002	2020	Dover sole	Alaska	AFSC	Delsa Anderl	NWFSC
20-001	2020	Dover sole	US west coast	NWFSC-PSMFC	Nikki Atkins	AFSC
19-006	2019	Yelloweye rockfish	Alaska	ADF&G - Homer	Elisa Russ	ADF&G - Juneau
19-005	2019	Widow rockfish	Washington State	WDFW	Jennifer Topping	NWFSC
19-004	2019	Black rockfish	Oregon	ODFW	Lisa Kautzi	ADFG -Homer
19-003	2019	Cabezon	Washington State	WDFW	Jennifer Topping	ODFW
19-002	2019	Cabezon	Oregon	ODFW	Lisa Kautzi	WDFW
19-001	2019	Pacific cod	Alaska	ADFG-Juneau	Jodi Neil	AFSC
18-010	2018	Big skate	US west coast	NWFSC-PSMFC	Tyler Johnson	AFSC
18-009	2018	Yelloweye rockfish	Alaska	ADF&G - Homer	Elisa Russ	ADFG-Juneau
18-008	2018	Sablefish	W. coast vancouver is., w.coast queen charlotte is.	CDFO	Barb Campbell	NWFSC, ADFG-Juneau, AFSC, CDFO
18-007	2018	Sablefish	S.E. Alaska	ADF&G - Juneau	Kevin McNeel/Jodi	NWFSC, ADFG-Juneau, AFSC, CDFO
18-006	2018	Longnose skate	Alaska	AFSC	Beth Matta/Morgan Arrington	NWFSC
18-005	2018	Canary rockfish	US West Coast	NWFSC	Patrick McDonald	WDFW
18-004	2018	Canary rockfish	Washington	WDFW	Jennifer Topping	NWFSC
18-003	2018	Sablefish	Alaska	AFSC	John Brogan	NWFSC, ADFG-Juneau, AFSC, CDFO
18-002	2018	Pacific cod	S.E. Alaska	ADFG-Juneau	Jodi Neil	AFSC
18-001	2018	Sablefish	US West Coast	NWFSC	Patrick McDonald	NWFSC, ADFG-Juneau, AFSC, CDFO
17-013	2017	Pacific cod	Washington	WDFW	Sandy Rosenfield	AFSC
17-012	2017	Lingcod	California/Oregon	MLML (moss landing)	Laurel Lam	PSMFC
17-011	2017	Petrale sole	US West Coast	NWFSC	Patrick McDonald	WDFW
17-010	2017	Pacific cod	Puget Sound	WDFW	Sandy Rosenfield	AFSC
17-009	2017	Yelloweye rockfish	WDFW	WDFW	Andrew Claiborne	ADF&G
17-008	2017	Yelloweye rockfish	US West Coast	NWFSC	Patrick McDonald	WDFW
17-007	2017	Yelloweye rockfish	US West Coast	NWFSC	Patrick McDonald	WDFW, NWFSC, and ADF&G
17-006	2017	Lingcod	WA Coast	WDFW	Jennifer Topping	ADF&G - Juneau
17-005	2017	Yelloweye rockfish	SE Alaska	ADF&G - Juneau	Kevin McNeel	WDFW, NWFSC, and ADF&G
17-004	2017	Blue/Deacon rockfish	Oregon	ODFW	Lisa Kautzi	SWFSC
17-003	2017	Rougheye rockfish	Cook Inlet	ADF&G - Juneau	Kevin McNeel
17-002	2017	Rougheye rockfish	Alaska	ADF&G - Juneau	Kevin McNeel
17-001	2017	Yelloweye rockfish	3C/3D, 5A/5B	CDFO	Barbara Campbell	NWFSC
16-004	2016	Blue/Deacon rockfish	Oregon	ODFW	Lisa Kautzi	SWFSC
16-003	2016	Arrowtooth flounder	Oregon	NWFSC-PSMFC	Lance Sullivan	AFSC
16-002	2016	Pacific herring	Puget Sound	WDFW	Andrew Claiborne	CDFO
16-001	2016	Pacific herring	14 and 17	CDFO	Joanne Groot	WDFW
15-004	2015	Geoduck	Barkley Sound, WCVI	CDFO	Judy McArthur	ADFG, WDFW
15-003	2015	Geoduck	Dungeness Central tract, WA	WDFW	Bethany Stevick	ADFG-ADU, CDFO
15-002	2015	Geoduck	Southern Southeast Alaska, Inside	ADFG-Juneau	Kristin Politano	WDFW, CDFO
15-001	2015	Black Rockfish	Oregon	ODFW	Lisa Kautzi	NWFSC-PSMFC
14-012	2014	Spiny Dogfish	Gulf of Alaska	ABL	Cindy Tribuzio	AFSC
14-011	2014	Black Rockfish	Oregon	ODFW	Lisa Kautzi	WDFW
14-010	2014	Lingcod	Kodiak	ADFG-Kodiak	Sonya Elmejjati	ADFG-Homer
14-009	2014	Shortraker Rockfish	Aleutian Islands, Canadian Waters	AFSC	Charles Hutchinson	ADFG, CDFO
14-008	2014	Shortraker Rockfish	5E	CDFO	Joanne Groot	NMFS-AFSC
14-007	2014	Longnose Skate	US West Coast	CDFO	Jackie King	AFSC, PSRC
14-006	2014	Longnose Skate	US West Coast	CDFO	Jackie King	CDFO, AFSC, PSRC
14-005	2014	Big Skate	US West Coast	CDFO	Jackie King	CDFO, AFSC, PSRC
14-004	2014	Big Skate	US West Coast	CDFO	Jackie King	CDFO, AFSC, PSRC
14-003	2014	Lingcod	Kodiak	ADFG-Kodiak	Sonya Elmejjati	ADFG-ADU
14-002	2014	Spiny Dogfish	Gulf of Alaska	ABL	Cindy Tribuzio	AFSC
14-001	2014	Rougheye rockfish	Washington	WDFW	Sandy Rosenfield	NWFSC – PSMFC
13-001	2013	Geoduck	SE Alaska	ADFG-Juneau	A. Rebert	CDFO, WDFW
12-003	2012	Sablefish	Mixed	ADFG-Juneau	K. Munk	CDFO, NWFSC, AFSC
12-002	2012	Sardines	British Columbian	CDFO	V. Hodes	WDFW
12-001	2012	Sardines	Astoria, OR	WDFW	S. Rosenfield	CDFO
11-004	2011	Longnose Skate	US West Coast	ODFW	J. Thompson	AFSC
11-003	2011	Longnose Skate	US West Coast	ODFW	J. Thompson	AFSC
11-002	2011	Longnose Skate	Gulf of Alaska	AFSC	C. Gburski	ADFG, ODFW
11-001	2011	Big Skate	Gulf of Alaska	AFSC	C. Gburski	ADFG, ODFW
10-007	2010	Yelloweye rockfish	Alaska	ADFG – Homer	E. Russ	ADFG-Juneau
10-006	2010	Longnose Skate	Gulf of Alaska	AFSC	C. Gburski	CDFO
10-005	2010	Big Skate	Gulf of Alaska	AFSC	C. Gburski	CDFO
10-004	2010	Pacific hake	US West Coast	CAP/PSMFC	O. Rodriguez	CDFO
10-003	2010	Pacific Ocean Perch	Pacific Northwest Coast	WDFW	S. Rosenfield	CDFO
10-002	2010	Lingcod	Gulf of Alaska	ADFG	K. Munk	ODFW
10-001	2010	Pacific hake	Pacific Northwest Coast	CDFO	J. Groot	NWFSC
09-009	2009	Sablefish	Alaska	AFSC	D. Anderl	CDFO, NWFSC, ADFG-Juneau
09-008	2009	Pacific Cod	Aleutian Islands	ADFG	S. El Mejjati	AFSC
09-007	2009	Pacific Cod	Gulf of Alaska	ADFG	S. El Mejjati	AFSC
09-006	2009	Pacific hake	Pacific Northwest Coast	NWFSC	O. Rodriguez	CDFO
09-005	2009	Pacific hake	Pacific Northwest Coast	CDFO	J. Groot	NWFSC
09-004	2009	Sablefish	Pacific Northwest Coast	AFSC	D. Anderl	NWFSC, CDFO, ADFG
09-003	2009	Sablefish	Pacific Northwest Coast	NWFSC	P. McDonald	AFSC, CDFO, ADFG
09-002	2009	Sablefish	British Columbian	CDFO	S. MacLellan	ADFG, NWFSC, AFSC
09-001	2009	Sablefish	Alaska	ADFG	J. Niel	CDFO, NWFSC, AFSC
08-003	2008	Yelloweye Rockfish	Southeast Alaska	ADFG-Juneau	K. Munk	CDFO, WDFW
08-002	2008	Sablefish	Pacific Northwest Coast	NWFSC	P. McDonald	AFSC, ADFG-Juneau, CDFO
08-001	2008	Sablefish	BC	CDFO	S. MacLellan	AFSC, ADFG-Juneau
07-006	2007	Pacific hake	Pacific Northwest Coast	NWFSC	O. Rodriguez	CDFO
07-005	2007	Pacific hake	BC	CDFO	S. MacLellan	NWFSC
07-004	2007	Vermillion rockfish	Pacific Northwest Coast	ODFW	J. Thompson	ADFG-Juneau
07-003	2007	Lingcod	BC	CDFO	S. MacLellan	ADFG-Homer
07-002	2007	Lingcod	Alaska	ADFG-Homer	C. Russ	CDFO
07-001	2007	Sablefish	Alaska	ADFG-Juneau	K. Munk	NWFSC, CDFO
06-006	2006	Pacific hake	West Coast Vancouver Island	CDFO	S. MacLellan	NWFSC
06-005	2006	Pacific hake	Pacific Northwest Coast	NWFSC	O. Rodriguez	CDFO
06-004	2006	Sablefish	Alaska	AFSC	D. Anderl	NWFSC, CDFO, ADFG-Juneau
06-003	2006	Sablefish	West Coast	CDFO	S. MacLellan	NWFSC, AFSC, ADFG-Juneau
06-002	2006	Sablefish	West Coast	NWFSC	P. McDonald	AFSC, CDFO, ADFG-Juneau
06-001	2006	Sablefish	Alaska	ADFG-Juneau	K. Munk	NWFSC, AFSC, CDFO
05-004	2005	Pacific Ocean Perch	Pacific Northwest Coast	NWFSC	S. Concetti	AFSC
05-003	2005	Pacific hake	Pacific Northwest Coast	NWFSC	O. Rodriguez	CDFO
05-002	2005	Pacific hake	Pacific Northwest Coast	CDFO	O. Rodriguez	NWFSC
05-001	2005	Pacific hake	Pacific Northwest Coast	CDFO	O. Rodriguez	NWFSC
04-007	2004	Pacific hake	Pacific Northwest Coast	NWFSC	O. Rodriguez	CDFO
04-006	2004	Pacific hake	Pacific Northwest Coast	CDFO	O. Rodriguez	NWFSC
04-005	2004	Pacific hake	Pacific Northwest Coast	NWFSC	O. Rodriguez	CDFO
04-004	2004	Dover sole	Pacific Northwest Coast	ODFW	B. Mikus	CDFG, NWFSC
04-003	2004	Darkblotched rockfish	Pacific Northwest Coast	NWFSC	J. Menkel	AFSC
04-002	2004	sablefish	Pacific Northwest Coast	NWFSC	P. McDonald	AFSC
04-001	2004	Pollock	Shelikof st.	AFSC	C. Kastelle	ADFG-Juneau
03-004	2003	Pacific Cod	Alaska	ADFG-Kodiak	J. Brodie	AFSC
03-003	2003	Pacific hake	Pacific Northwest Coast	CDFO	S. MacLellan	NWFSC
03-002	2003	Pacific hake	Pacific Northwest Coast	NWFSC	O. Rodriguez	CDFO
03-001	2003	Dover sole		ODFW	B. Mikus	CDFG, NWFSC
02-004	2002	sablefish	Pacific Northwest Coast	ODFW	P. McDonald	AFSC, CDFO, ADFG-Juneau
02-002	2002	Dover sole	Pacific Northwest Coast	ODFW	B. Miller	AFSC, CDFG, IPHC
02-001	2002	Sablefish(known-age)	Gulf of Alaska	AFSC	D.Anderl	ADFG-Juneau
01-004	2001	Pacific hake	Pacific Northwest Coast	ODFW	P. McDonald	AFSC
01-003	2001	Pacific hake	Pacific Northwest Coast	AFSC	D. Anderl	ODFW
01-002	2000	Lingcod	Pacific Northwest Coast	WDFW	J. Sneva	CDFO, ODFW
01-001	2001	Yelloweye Rockfish	Southeast Alaska	ADFG-Juneau	K. Munk	CDFO
00-006	2000	Thornyhead rockfish	Southcentral Alaska	ADFG-Juneau	K. Munk	CDFO
00-005	2000	Pollock	Gulf of Alaska	ADFG-Juneau	K. Munk	AFSC
00-004	2000	Dover Sole(3)	Gulf of Alaska	ODFW	B. Mikus	CDFG, IPHC, AFSC
00-003	2000	Dover Sole(2)	Pacific Northwest Coast	ODFW	B. Mikus	CDFG, IPHC, AFSC, CDFO
00-002	2000	Dover Sole(1)	Pacific Northwest Coast	ODFW	B. Mikus	CDFG, IPHC, CDFO, AFSC
00-001	2000	Sablefish	Southeast Alaska	ADFG-Juneau	K. Munk	ODFW, AFSC
99-012	1999	Pacific hake	British Columbian	CDFO	S. MacLellan	AFSC
99-011	1999	Lingcod	Alaska	ADFG-Homer	C. Stock	CDFO
99-010	1999	Dusky Rockfish	Southeast and Southcentral Alaska	ADFG-Juneau	K. Munk	CDFO, ODFW, WDFW
99-009	1999	Quillback Rockfish	Southeast and Southcentral Alaska	ADFG-Juneau	K. Munk	CDFO, ODFW, WDFW
99-008	1999	Thornyhead rockfish	Southeast and Southcentral Alaska	ADFG-Juneau	K. Munk	CDFO, ODFW
99-007	1999	Yelloweye Rockfish	Southeast and Southcentral Alaska	ADFG-Juneau	K. Munk	CDFO, ODFW, WDFW
99-006	1999	Rougheye Rockfish	Southeast and Southcentral Alaska	ADFG-Juneau	K. Munk	CDFO, ODFW
99-005	1999	Lingcod	Pacific Northwest Coast	WDFW	J. Sneva	CDFO, NMFS-Tiburon
99-004	1999	Halibut	Alaska	ADFG-Homer	S. Meyer	IPHC
99-001	1999	Dover Sole	Pacific Northwest Coast	ODFW	B. Mikus	CDFG, IPHC, NMFS
98-002	1998	Black Rockfish	Pacific Northwest Coast	WDFW	J. Sneva	ODFW
98-001	1998	English Sole	Pacific Northwest Coast	WDFW	J. Sneva	ODFW