Committee of Age Reading Experts

Structure Exchanges

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. You can use this spreadsheet to calculate precision statistics between two age readers. Just enter the ages into the two columns on the first tab, and the other tabs will show the results.

Exchange IDExchange YearSpeciesStockOriginating AgencyCoordinatorCooperators
22-0012022Black rockfishAlaskaADFGKevin McNeelADFG
21-0022021Black rockfishSitkaADFGKevin McNeelADFG
21-0012021Pacific hakeCanadaCDFOAudrey TyNWFSC-PSMFC
20-0102020Vermillion rockfishOregonODFWMark TerwilligerNWFSC, WDFW, SWFSC
20-0092020Vermillion rockfishCA S. Pt. ConceptionNWFSC-PSMFCPatrick McDonaldWDFW, SWFSC, ODFW
20-0082020Vermillion rockfishCA North Pt. ConceptionSWFSCMelissa MonkWDFW, NWFSC, ODFW
20-0072020Vermillion rockfishWA CoastWDFWJenny ToppingNWFSC, ODFW, SWFSC
20-0062020Yelloweye rockfishAlaskaADF&G- HomerElisa RussADF&G - Juneau
20-0052020Rougheye rockfishGulf of AlaskaAFSCChris GburskiADF&G - Juneau
20-0042020Rougheye rockfishAlaskaADF&G - JuneauCathy MattsonAFSC
20-0032020SablefishGulf of AlaskaAFSCDelsa AnderlADFG-Juneau, NWFSC, DFO
20-0022020Dover soleAlaskaAFSCDelsa AnderlNWFSC
20-0012020Dover soleUS west coastNWFSC-PSMFCNikki AtkinsAFSC
19-0062019Yelloweye rockfishAlaskaADF&G - HomerElisa RussADF&G - Juneau
19-0052019Widow rockfishWashington StateWDFWJennifer ToppingNWFSC
19-0042019Black rockfishOregonODFWLisa KautziADFG -Homer
19-0032019CabezonWashington StateWDFWJennifer ToppingODFW
19-0022019CabezonOregonODFWLisa KautziWDFW
19-0012019Pacific codAlaskaADFG-JuneauJodi NeilAFSC
18-0102018Big skateUS west coastNWFSC-PSMFCTyler JohnsonAFSC
18-0092018Yelloweye rockfishAlaskaADF&G - HomerElisa RussADFG-Juneau
18-0082018SablefishW. coast vancouver is., w.coast queen charlotte is.CDFOBarb CampbellNWFSC, ADFG-Juneau, AFSC, CDFO
18-0072018SablefishS.E. AlaskaADF&G - JuneauKevin McNeel/JodiNWFSC, ADFG-Juneau, AFSC, CDFO
18-0062018Longnose skateAlaskaAFSCBeth Matta/Morgan ArringtonNWFSC
18-0052018Canary rockfishUS West CoastNWFSCPatrick McDonaldWDFW
18-0042018Canary rockfishWashingtonWDFWJennifer ToppingNWFSC
18-0032018SablefishAlaskaAFSCJohn BroganNWFSC, ADFG-Juneau, AFSC, CDFO
18-0022018Pacific codS.E. AlaskaADFG-JuneauJodi NeilAFSC
18-0012018SablefishUS West CoastNWFSCPatrick McDonaldNWFSC, ADFG-Juneau, AFSC, CDFO
17-0132017Pacific codWashingtonWDFWSandy RosenfieldAFSC
17-0122017LingcodCalifornia/OregonMLML (moss landing)Laurel LamPSMFC
17-0112017Petrale soleUS West CoastNWFSCPatrick McDonaldWDFW
17-0102017Pacific codPuget SoundWDFWSandy RosenfieldAFSC
17-0092017Yelloweye rockfishWDFWWDFWAndrew ClaiborneADF&G
17-0082017Yelloweye rockfishUS West CoastNWFSCPatrick McDonaldWDFW
17-0072017Yelloweye rockfishUS West CoastNWFSCPatrick McDonaldWDFW, NWFSC, and ADF&G
17-0062017LingcodWA CoastWDFWJennifer ToppingADF&G - Juneau
17-0052017Yelloweye rockfishSE AlaskaADF&G - JuneauKevin McNeelWDFW, NWFSC, and ADF&G
17-0042017Blue/Deacon rockfishOregonODFWLisa KautziSWFSC
17-0032017Rougheye rockfishCook InletADF&G - JuneauKevin McNeel
17-0022017Rougheye rockfishAlaskaADF&G - JuneauKevin McNeel
17-0012017Yelloweye rockfish3C/3D, 5A/5BCDFOBarbara CampbellNWFSC
16-0042016Blue/Deacon rockfishOregonODFWLisa KautziSWFSC
16-0032016Arrowtooth flounderOregonNWFSC-PSMFCLance SullivanAFSC
16-0022016Pacific herringPuget SoundWDFWAndrew ClaiborneCDFO
16-0012016Pacific herring14 and 17CDFOJoanne GrootWDFW
15-0042015GeoduckBarkley Sound, WCVICDFOJudy McArthurADFG, WDFW
15-0032015GeoduckDungeness Central tract, WAWDFWBethany StevickADFG-ADU, CDFO
15-0022015GeoduckSouthern Southeast Alaska, InsideADFG-JuneauKristin PolitanoWDFW, CDFO
15-0012015Black RockfishOregonODFWLisa KautziNWFSC-PSMFC
14-0122014Spiny DogfishGulf of AlaskaABLCindy TribuzioAFSC
14-0112014Black RockfishOregonODFWLisa KautziWDFW
14-0102014LingcodKodiakADFG-KodiakSonya ElmejjatiADFG-Homer
14-0092014Shortraker RockfishAleutian Islands, Canadian WatersAFSCCharles HutchinsonADFG, CDFO
14-0082014Shortraker Rockfish5ECDFOJoanne GrootNMFS-AFSC
14-0072014Longnose SkateUS West CoastCDFOJackie KingAFSC, PSRC
14-0062014Longnose SkateUS West CoastCDFOJackie KingCDFO, AFSC, PSRC
14-0052014Big SkateUS West CoastCDFOJackie KingCDFO, AFSC, PSRC
14-0042014Big SkateUS West CoastCDFOJackie KingCDFO, AFSC, PSRC
14-0032014LingcodKodiakADFG-KodiakSonya ElmejjatiADFG-ADU
14-0022014Spiny DogfishGulf of AlaskaABLCindy TribuzioAFSC
14-0012014Rougheye rockfishWashingtonWDFWSandy RosenfieldNWFSC – PSMFC
13-0012013GeoduckSE AlaskaADFG-JuneauA. RebertCDFO, WDFW
12-0032012SablefishMixedADFG-JuneauK. MunkCDFO, NWFSC, AFSC
12-0022012SardinesBritish ColumbianCDFOV. HodesWDFW
12-0012012SardinesAstoria, ORWDFWS. RosenfieldCDFO
11-0042011Longnose SkateUS West CoastODFWJ. ThompsonAFSC
11-0032011Longnose SkateUS West CoastODFWJ. ThompsonAFSC
11-0022011Longnose SkateGulf of AlaskaAFSCC. GburskiADFG, ODFW
11-0012011Big SkateGulf of AlaskaAFSCC. GburskiADFG, ODFW
10-0072010Yelloweye rockfishAlaskaADFG – HomerE. RussADFG-Juneau
10-0062010Longnose SkateGulf of AlaskaAFSCC. GburskiCDFO
10-0052010Big SkateGulf of AlaskaAFSCC. GburskiCDFO
10-0042010Pacific hakeUS West CoastCAP/PSMFCO. RodriguezCDFO
10-0032010Pacific Ocean PerchPacific Northwest CoastWDFWS. RosenfieldCDFO
10-0022010LingcodGulf of AlaskaADFGK. MunkODFW
10-0012010Pacific hakePacific Northwest CoastCDFOJ. GrootNWFSC
09-0092009SablefishAlaskaAFSCD. AnderlCDFO, NWFSC, ADFG-Juneau
09-0082009Pacific CodAleutian IslandsADFGS. El MejjatiAFSC
09-0072009Pacific CodGulf of AlaskaADFGS. El MejjatiAFSC
09-0062009Pacific hakePacific Northwest CoastNWFSCO. RodriguezCDFO
09-0052009Pacific hakePacific Northwest CoastCDFOJ. GrootNWFSC
09-0042009SablefishPacific Northwest CoastAFSCD. AnderlNWFSC, CDFO, ADFG
09-0032009SablefishPacific Northwest CoastNWFSCP. McDonaldAFSC, CDFO, ADFG
09-0022009SablefishBritish ColumbianCDFOS. MacLellanADFG, NWFSC, AFSC
09-0012009SablefishAlaskaADFGJ. NielCDFO, NWFSC, AFSC
08-0032008Yelloweye RockfishSoutheast AlaskaADFG-JuneauK. MunkCDFO, WDFW
08-0022008SablefishPacific Northwest CoastNWFSCP. McDonaldAFSC, ADFG-Juneau, CDFO
08-0012008SablefishBCCDFOS. MacLellanAFSC, ADFG-Juneau
07-0062007Pacific hakePacific Northwest CoastNWFSCO. RodriguezCDFO
07-0052007Pacific hakeBCCDFOS. MacLellanNWFSC
07-0042007Vermillion rockfishPacific Northwest CoastODFWJ. ThompsonADFG-Juneau
07-0032007LingcodBCCDFOS. MacLellanADFG-Homer
07-0022007LingcodAlaskaADFG-HomerC. RussCDFO
07-0012007SablefishAlaskaADFG-JuneauK. MunkNWFSC, CDFO
06-0062006Pacific hakeWest Coast Vancouver IslandCDFOS. MacLellanNWFSC
06-0052006Pacific hakePacific Northwest CoastNWFSCO. RodriguezCDFO
06-0042006SablefishAlaskaAFSCD. AnderlNWFSC, CDFO, ADFG-Juneau
06-0032006SablefishWest CoastCDFOS. MacLellanNWFSC, AFSC, ADFG-Juneau
06-0022006SablefishWest CoastNWFSCP. McDonaldAFSC, CDFO, ADFG-Juneau
06-0012006SablefishAlaskaADFG-JuneauK. MunkNWFSC, AFSC, CDFO
05-0042005Pacific Ocean PerchPacific Northwest CoastNWFSCS. ConcettiAFSC
05-0032005Pacific hakePacific Northwest CoastNWFSCO. RodriguezCDFO
05-0022005Pacific hakePacific Northwest CoastCDFOO. RodriguezNWFSC
05-0012005Pacific hakePacific Northwest CoastCDFOO. RodriguezNWFSC
04-0072004Pacific hakePacific Northwest CoastNWFSCO. RodriguezCDFO
04-0062004Pacific hakePacific Northwest CoastCDFOO. RodriguezNWFSC
04-0052004Pacific hakePacific Northwest CoastNWFSCO. RodriguezCDFO
04-0042004Dover solePacific Northwest CoastODFWB. MikusCDFG, NWFSC
04-0032004Darkblotched rockfishPacific Northwest CoastNWFSCJ. MenkelAFSC
04-0022004sablefishPacific Northwest CoastNWFSCP. McDonaldAFSC
04-0012004PollockShelikof st.AFSCC. KastelleADFG-Juneau
03-0042003Pacific CodAlaskaADFG-KodiakJ. BrodieAFSC
03-0032003Pacific hakePacific Northwest CoastCDFOS. MacLellanNWFSC
03-0022003Pacific hakePacific Northwest CoastNWFSCO. RodriguezCDFO
03-0012003Dover soleODFWB. MikusCDFG, NWFSC
02-0042002sablefishPacific Northwest CoastODFWP. McDonaldAFSC, CDFO, ADFG-Juneau
02-0022002Dover solePacific Northwest CoastODFWB. MillerAFSC, CDFG, IPHC
02-0012002Sablefish(known-age)Gulf of AlaskaAFSCD.AnderlADFG-Juneau
01-0042001Pacific hakePacific Northwest CoastODFWP. McDonaldAFSC
01-0032001Pacific hakePacific Northwest CoastAFSCD. AnderlODFW
01-0022000LingcodPacific Northwest CoastWDFWJ. SnevaCDFO, ODFW
01-0012001Yelloweye RockfishSoutheast AlaskaADFG-JuneauK. MunkCDFO
00-0062000Thornyhead rockfishSouthcentral AlaskaADFG-JuneauK. MunkCDFO
00-0052000PollockGulf of AlaskaADFG-JuneauK. MunkAFSC
00-0042000Dover Sole(3)Gulf of AlaskaODFWB. MikusCDFG, IPHC, AFSC
00-0032000Dover Sole(2)Pacific Northwest CoastODFWB. MikusCDFG, IPHC, AFSC, CDFO
00-0022000Dover Sole(1)Pacific Northwest CoastODFWB. MikusCDFG, IPHC, CDFO, AFSC
00-0012000SablefishSoutheast AlaskaADFG-JuneauK. MunkODFW, AFSC
99-0121999Pacific hakeBritish ColumbianCDFOS. MacLellanAFSC
99-0111999LingcodAlaskaADFG-HomerC. StockCDFO
99-0101999Dusky RockfishSoutheast and Southcentral AlaskaADFG-JuneauK. MunkCDFO, ODFW, WDFW
99-0091999Quillback RockfishSoutheast and Southcentral AlaskaADFG-JuneauK. MunkCDFO, ODFW, WDFW
99-0081999Thornyhead rockfishSoutheast and Southcentral AlaskaADFG-JuneauK. MunkCDFO, ODFW
99-0071999Yelloweye RockfishSoutheast and Southcentral AlaskaADFG-JuneauK. MunkCDFO, ODFW, WDFW
99-0061999Rougheye RockfishSoutheast and Southcentral AlaskaADFG-JuneauK. MunkCDFO, ODFW
99-0051999LingcodPacific Northwest CoastWDFWJ. SnevaCDFO, NMFS-Tiburon
99-0041999HalibutAlaskaADFG-HomerS. MeyerIPHC
99-0011999Dover SolePacific Northwest CoastODFWB. MikusCDFG, IPHC, NMFS
98-0021998Black RockfishPacific Northwest CoastWDFWJ. SnevaODFW
98-0011998English SolePacific Northwest CoastWDFWJ. SnevaODFW