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Yellowtail Flounder: QA/QC Exercise Results

Results of the QA/QC exercises for ageing yellowtail flounder.

Yellowtail Flounder, Limanda ferruginea

Image
Right-facing, right-eyed yellowtail flounder fish illustration. This flatfish has a reddish brown body with rusty red spots and yellow fins. Credit: NOAA Fisheries/Jack Hornady

Sarah Emery (SE) has been working with Yellowtail Flounder at NOAA since 2009, and has 5 years of prior experience. Whole otoliths are viewed with reflected light. Until 2019, scales were impressed in plastic and viewed with a projector.

In tests where agreement is below 90%, bias indicates either the P-value of a symmetry test or ‘n/s’ (test not significant at the α = 0.05 level). The Evans & Hoenig test was used to test bias starting 1/2022; prior to that, a Bowker's test was used. Structure indicates which part of the fish was used: Scales, Otoliths, or comparisons between the two structures.

Sample SourceStructureTest TypeDate Com-pletedAge ReaderNumber AgedNumber TestedCV (%)Agree-ment (%)Bias
2024 Spring Survey (202402)OtolithsPrecision6/2024SE456641.2790.5 
2023 Commercial Samples (Q2-4)OtolithsPrecision2/2024SE250562.1182.1n/s
2022 Observer Samples (Q1-Q4)OtolithsPrecision1/2024SE319601.6089.8n/s
2023 Massachusetts Autumn Survey (202392)OtolithsPrecision1/2024SE152421.1692.9 
2023 Autumn Survey (202304)OtolithsPrecision12/2023SE410601.2893.3 
2021 Observer Samples (Q1-Q4)OtolithsPrecision12/2023SE261491.1489.8n/s
2023 Massachusetts Spring Survey (202391)OtolithsPrecision9/2023SE281651.1392.3 
2023 Commercial Samples (Q1)OtolithsPrecision5/2023SE123421.0490.5 
2022 Autumn Survey (202204)OtolithsPrecision1/2023SE284581.1193.1 
2022 Massachusetts Autumn Survey (202292)OtolithsPrecision1/2023SE193501.3590.0 
2022 Massachusetts Spring Survey (202291)OtolithsPrecision11/2022SE197491.1489.8n/s
2022 Commercial Samples (Q2)OtolithsPrecision9/2022SE128421.0190.5 
2022 Spring Survey (202202)OtolithsPrecision6/2022SE373711.4491.5 
2021 Massachusetts Autumn Survey (202192)OtolithsPrecision4/2022SE129331.1490.9 
2021 Commercial Samples (Q1-Q4)OtolithsPrecision3/2022SE126321.8287.5n/s
2021 Autumn Survey (202104)OtolithsPrecision1/2022SE274451.9291.1 
2021 Massachusetts Spring Survey (202191)OtolithsPrecision9/2021SE117292.0386.2n/s
2021 Spring Survey (202102)OtolithsPrecision7/2021SE574741.9989.2n/s
2020 Commercial Samples (Q2)OtolithsPrecision11/2020SE196632.0185.7n/s
2019 Massachusetts Autumn Survey (201992)OtolithsPrecision2/2020SE179441.0095.5 
2019 Autumn Survey (201904)OtolithsPrecision12/2019SE433821.4389.0n/s
2019 Massachusetts Spring Survey (201991)OtolithsPrecision9/2019SE184362.0486.1n/s
2019 Spring Survey (201902)ScalesPrecision6/2019SE463831.9488.0n/s
2019 Spring Survey (201902)OtolithsPrecision6/2019SE463830.3797.6 
2018 Commercial Samples (Q4)OtolithsPrecision5/2019SE121401.4292.5 
2018 Commercial Samples (Q3)Otoliths vs. ScalesInter-Structure3/2019SE78781.9091.0 
2018 Commercial Samples (Q3)OtolithsPrecision3/2019SE117394.3674.4n/s
2018 Massachusetts Autumn Survey (201892)OtolithsPrecision3/2019SE180440.9495.5 
2018 Autumn Survey (201804)OtolithsPrecision12/2018SE487851.7990.6 
2018 Autumn Survey (201804)ScalesPrecision12/2018SE487872.1492.0 
2018 Commercial Samples (Q2)Otoliths vs. ScalesInter-Structure11/2018SE2062063.8677.7n/s
2018 Commercial Samples (Q2)OtolithsPrecision11/2018SE227542.2488.9n/s
2018 Commercial Samples (Q2)ScalesPrecision11/2018SE445882.0088.6n/s
2018 Massachusetts Spring Survey (201891)ScalesPrecision9/2018SE345682.4486.8n/s
2018 Commercial Samples (Q1)OtolithsPrecision8/2018SE236541.5892.6 
2018 Commercial Samples (Q1)ScalesPrecision8/2018SE387741.3091.9 
2018 Spring Survey (201802)OtolithsPrecision6/2018SE115501.9188.0n/s
2018 Spring Survey (201802)ScalesPrecision6/2018SE274591.0493.2 
2017 Commercial Samples (Q4)ScalesPrecision3/2018SE337670.5795.5 
2017 Commercial Samples (Q3)ScalesPrecision2/2018SE406831.9488.0n/s
2017 Massachusetts Autumn Survey (201792)ScalesPrecision2/2018SE274481.5591.7 
2017 Autumn Survey (201704)ScalesPrecision1/2018SE307592.9788.1n/s
2017 Commercial Samples (Q2)ScalesPrecision12/2017SE848972.8583.5n/s
2017 Commercial Samples (Q1)ScalesPrecision8/2017SE555970.9094.8 
2017 Massachusetts Spring Survey (201791)ScalesPrecision8/2017SE264571.1394.7 
2017 Spring Survey (201702)ScalesPrecision6/2017SE551951.3093.7 
2016 Massachusetts Autumn Survey (201692)ScalesPrecision4/2017SE147350.8197.1 
2016 Commercial Samples (Q4)ScalesPrecision4/2017SE8541002.4089.0n/s
2016 Commercial Samples (Q3)ScalesPrecision2/2017SE235533.5784.9n/s
2016 Autumn Survey (201604)ScalesPrecision1/2017SE563992.7093.9 
2016 Commercial Samples (Q2)ScalesPrecision12/2016SE9961001.9488.0n/s
2016 Massachusetts Spring Survey (201691)ScalesPrecision10/2016SE370650.4498.5 
2016 Commercial Samples (Q1)ScalesPrecision10/2016SE11061001.6091.0 
2016 Spring Survey (201602)ScalesPrecision8/2016SE672971.5592.8 
2016 Canadian (DFO) Spring Survey (TEL2016002)ScalesPrecision5/2016SE153300.5296.7 
2015 Commercial Samples (Q4)ScalesPrecision4/2016SE905982.5985.7n/s
2015 Massachusetts Autumn Survey (201592)ScalesPrecision3/2016SE249542.7992.6 
2015 Commercial Samples (Q3)ScalesPrecision3/2016SE640961.9290.6 
2015 Autumn Survey (201504)ScalesPrecision12/2015SE459882.1497.7 
2015 Commercial Samples (Q2)ScalesPrecision10/2015SE8121001.3692.0 
2015 Massachusetts Spring Survey (201591)ScalesPrecision8/2015SE247550.7396.4 
2015 Commercial Samples (Q1)ScalesPrecision8/2015SE650911.5591.2 
2015 Spring Survey (201502)ScalesPrecision6/2015SE638981.1492.9 
Yellowtail Reference CollectionScalesAccuracy4/2015SE681.9386.8n/a
2014 Massachusetts Autumn Survey (201492)ScalesPrecision4/2015SE183451.6895.6 
2014 Commercial Samples (Q4)ScalesPrecision3/2015SE627922.5287.0n/s
2014 Commercial Samples (Q3)ScalesPrecision2/2015SE208451.3393.3 
2014 Autumn Survey (201404)ScalesPrecision1/2015SE580871.2194.3 
2014 Commercial Samples (Q2)ScalesPrecision12/2014SE648960.8994.8 
2014 Commercial Samples (Q1)ScalesPrecision11/2014SE515980.6196.9 
2014 Massachusetts Spring Survey (201491)ScalesPrecision9/2014SE194482.5289.6n/s
2014 Spring Survey (201402)ScalesPrecision7/2014SE713960.5197.9 
2013 Massachusetts Autumn Survey (201392)ScalesPrecision5/2014SE179440.9295.5 
2013 Massachusetts Spring Survey (201391)ScalesPrecision4/2014SE192461.0693.5 
2013 Commercial Samples (Q4)ScalesPrecision4/2014SE559971.7188.7n/s
2013 Commercial Samples (Q3)ScalesPrecision3/2014SE597961.0893.8 
2013 Autumn Survey (201304)ScalesPrecision2/2014SE586951.9891.6 
2013 Commercial Samples (Q2)ScalesPrecision1/2014SE867991.1793.9 
2013 Yellowtail Cooperative Survey (201350 & 201351)ScalesPrecision12/2013SE9931003.1186.0n/s
2013 Commercial Samples (Q1)ScalesPrecision9/2013SE9131011.5990.1 
2013 Canadian (DFO) Spring Survey (NED2013002)ScalesPrecision8/2013SE159432.9983.7n/s
2013 Spring Survey (201302)ScalesPrecision7/2013SE9731002.1288.0n/s
2012 Massachusetts Autumn Survey (201292)ScalesPrecision2/2013SE153511.2694.1 
2012 Commercial Samples (Q4)ScalesPrecision2/2013SE13871022.4887.3n/s
2012 Autumn Survey (201204)ScalesPrecision2/2013SE7121082.5887.0n/s
2012 Commercial Samples (Q3)ScalesPrecision12/2012SE742992.1588.9n/s
2012 Commercial Samples (Q2)ScalesPrecision11/2012SE763972.1387.6n/s
2012 Massachusetts Spring Survey (201291)ScalesPrecision9/2012SE162511.4192.2 
2012 Commercial Samples (Q1)ScalesPrecision8/2012SE12531002.5583.0n/s
2011 Massachusetts Autumn Survey (201192)ScalesPrecision6/2012SE201541.1294.4 
2012 Spring Survey (201202)ScalesPrecision6/2012SE606981.5490.8 
2012 Canadian (DFO) Spring Survey (NED2012002)ScalesPrecision5/2012SE505973.0482.5n/s
2011 Autumn Survey (201105)ScalesPrecision4/2012SE7751001.8292.0 
2011 Commercial Samples (Q4)ScalesPrecision3/2012SE1047990.7796.0 
2011 Commercial Samples (Q3)ScalesPrecision2/2012SE7031001.3893.0 
2011 Commercial Samples (Q2)ScalesPrecision12/2011SE1177991.0093.9 
2011 Massachusetts Spring Survey (201191)ScalesPrecision11/2011SE281752.2089.3n/s
2011 Commercial Samples (Q1)ScalesPrecision7/2011SE14961031.8886.4n/s
2011 Spring Survey (201102)ScalesPrecision6/2011SE428952.0188.4n/s
2010 Massachusetts Autumn Survey (201092)ScalesPrecision4/2011SE288752.0592.0 
2011 Canadian (DFO) Spring Survey (NED2011002)ScalesPrecision4/2011SE3591003.3282.0n/s
2010 Commercial Samples (Q4)ScalesPrecision3/2011SE1042961.0494.8 
2010 Commercial Samples (Q3)ScalesPrecision2/2011SE8161003.7978.0n/s
2010 Commercial Samples (Q2)ScalesPrecision1/2011SE12121042.3086.5n/s
2010 Commercial Samples (Q1)ScalesPrecision2/2011SE1206991.5489.9n/s
2010 Autumn Survey (201004)ScalesPrecision1/2011SE707981.6492.9 
2010 Spring Survey (201001)ScalesPrecision6/2010SE1348990.5096.0 
2010 Massachusetts Spring Survey (201091)ScalesPrecision11/2010SE422731.3594.5 
2010 Canadian (DFO) Spring Survey (NED2010001)ScalesPrecision2010SE384752.7084.0n/s
2009 Commercial Samples (Q4)ScalesPrecision5/2010SE675993.5782.80.037
2009 Commercial Samples (Q3)ScalesPrecision2/2010SE10271042.1289.4n/s
2009 Autumn Survey (200904)ScalesPrecision1/2010SE10071001.6992.0 
2009 Commercial Samples (Q2)ScalesPrecision12/2009SE12461231.3991.9 
2009 Commercial Samples (Q1)ScalesPrecision1/2010SE11941001.4892.0 
2008 Commercial Samples (Q4)ScalesPrecision5/2009SM*10561054.4881.9n/s
2008 Commercial Samples (Q3)ScalesPrecision4/2009SM*12251004.5580.00.016
2008 Commercial Samples (Q2)ScalesPrecision3/2009SE vs. SM*1087993.1282.8n/s
2008 Commercial Samples (Q2)ScalesPrecision3/2009SM*1087993.4281.80.003
2008 Commercial Samples (Q1)ScalesPrecision12/2008SP10901022.8485.3n/s
2008 Autumn Survey (200807)ScalesPrecision12/2008SP508755.5178.70.024
Yellowtail Reference CollectionScalesAccuracy6/2008SP791.6291.1 
2008 Spring Survey (200803)ScalesPrecision5/2008SP483752.0589.3n/s
2007 Commercial Samples (Q4)ScalesPrecision5/2008SP13701001.8391.0 
2007 Commercial Samples (Q3)ScalesPrecision5/2008SP11401006.5475.00.006
2007 Commercial Samples (Q2)ScalesPrecision4/2008SP9691003.2982.0n/s
2007 Commercial Samples (Q1)ScalesPrecision4/2008SP1143933.7280.60.006
2007 Autumn Survey (200709)ScalesPrecision12/2007SP499753.9380.0n/s
Yellowtail Reference CollectionScalesAccuracy5/2007SP751.1693.3 
2007 Spring Survey (200703)ScalesPrecision5/2007SP540752.4188.0n/s
2006 Commercial Samples (Q4)ScalesPrecision5/2007SP1010704.9478.60.005
2006 Commercial Samples (Q3)ScalesPrecision5/2007SP1184751.9790.7 
2006 Commercial Samples (Q2)ScalesPrecision4/2007SP789752.3584.0n/s
2006 Commercial Samples (Q1)ScalesPrecision3/2007SP1175703.2578.6n/s
2006 Autumn Survey (200610)ScalesPrecision2/2007SP569753.5788.0n/s
2006 Spring Survey (200604)ScalesPrecision5/2006SP347501.5690.0 
2005 Commercial Samples (Q1-4)ScalesPrecision5/2006SP2785792.4887.3n/s
2005 Autumn Survey (200510)ScalesPrecision3/2006SP246545.0581.5n/s
2004 Commercial Samples (Q1-4), 2004 Autumn Survey (200407), & 2005 Spring Survey (200503)ScalesPrecision6/2005SP30221006.1173.0n/s
2004 Commercial Samples (Q1-4), 2004 Autumn Survey (200407), & 2005 Spring Survey (200503)ScalesPrecision6/2005VS30221006.6471.0n/s
2005 Canadian (DFO) Spring Survey (NED2005001)ScalesPrecision4/2005VS4271001.7992.0 
2004 Canadian (DFO) Commercial SamplesScalesPrecision1/2005SP vs. VS1621624.8374.7n/s
2004 Canadian (DFO) Commercial SamplesScalesPrecision1/2005VS1671672.5286.2n/s
2004 Canadian (DFO) Spring Survey (TEM2004004)ScalesPrecision2004VS973.9779.4n/s
2004 Winter Survey (200401)ScalesPrecision5/2004VS164180.8794.4 
2003 Autumn Survey (200306)ScalesPrecision5/2004VS290824.3681.7n/s

 

*SP married to become SM early in 2009.

Last updated by Northeast Fisheries Science Center on June 26, 2024

Age and Growth