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American Plaice: QA/QC Exercise Results

Results of the QA/QC exercises for ageing American plaice.

American Plaice, Hippoglossoides platessoides

Image
American plaice illustration. Credit: Jack Hornady.

Josh Dayton (JD) has been working with American Plaice since 2010. Sectioned otoliths are viewed with reflected light.

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.

Sample Source Test Type Date Completed Age Reader Number Aged Number Tested CV (%) Agree-ment (%) Bias
2021 Commercial Samples (Q1-4) Precision 8/2022 JD 217 51 2.65 78.4 n/s
2021 Autumn Survey (202104) Precision 8/2022 JD 568 98 2.13 84.7 n/s
2021 Spring Survey (202102) Precision 8/2022 JD 578 100 2.73 82.0 n/s
2020 Commercial Samples (Q3-4) Precision 8/2021 JD 373 79 3.39 67.1 n/s
2020 Commercial Samples (Q2) Precision 8/2021 JD 303 64 4.12 51.6 n/s
2020 Commercial Samples (Q1) Precision 8/2021 JD 261 53 1.79 77.4 n/s
2019 Commercial Samples (Q4) Precision 8/2020 JD 190 40 3.03 67.5 n/s
2019 Commercial Samples (Q3) Precision 7/2020 JD 198 40 2.44 77.5 n/s
2019 Commercial Samples (Q2) Precision 7/2020 JD 520 100 3.15 65.0 n/s
2019 Autumn Survey (201904) Precision 6/2020 JD 638 100 4.66 73.0 n/s
2019 Commercial Samples (Q1) Precision 5/2020 JD 243 51 4.54 58.8 n/s
2019 Spring Survey (201902) Precision 9/2019 JD 639 97 3.94 73.2 P = 0.038
2018 Commercial Samples (Q3-4) Precision 6/2019 JD 470 96 3.79 63.5 n/s
2018 Commercial Samples (Q2) Precision 5/2019 JD 483 92 4.01 62.0 n/s
2018 Commercial Samples (Q1) Precision 5/2019 JD 509 101 2.45 76.2 n/s
2018 Autumn Survey (201804) Precision 3/2019 JD 477 74 3.15 78.4 n/s
2018 Spring Survey (201802) Precision 2/2019 JD 500 102 4.03 71.6 n/s
2017 Commercial Samples (Q4) Precision 6/2018 JD 468 91 4.61 63.7 n/s
2017 Commercial Samples (Q3) Precision 6/2018 JD 602 97 5.20 60.2 n/s
2017 Autumn Survey (201704) Precision 3/2018 JD 329 64 5.04 75.0 n/s
2017 Commercial Samples (Q2) Precision 3/2018 JD 581 95 4.71 61.1 n/s
2017 Commercial Samples (Q1) Precision 3/2018 JD 532 100 5.79 59.0 n/s
2017 Spring Survey (201702) Precision 7/2017 JD 914 99 3.76 71.7 n/s
2016 Autumn Survey (201604) Precision 6/2017 JD 913 97 5.83 70.1 n/s
2016 Commercial Samples (Q4) Precision 5/2017 JD 453 87 3.76 67.8 n/s
2016 Commercial Samples (Q3) Precision 5/2017 JD 499 100 5.80 53.0 n/s
2016 Commercial Samples (Q2) Precision 5/2017 JD 582 97 3.85 59.8 n/s
2016 Commercial Samples (Q1) Precision 4/2017 JD 583 97 3.63 66.0 n/s
2016 Spring Survey (201602) Precision 3/2017 JD 1237 97 2.62 82.5 n/s
2015 Commercial Samples (Q4) Precision 7/2016 JD 505 101 3.67 67.3 n/s
2015 Commercial Samples (Q3) Precision 7/2016 JD 409 80 5.08 58.8 n/s
2015 Autumn Survey (201504) Precision 6/2015 JD 1148 97 2.54 84.5 n/s
2015 Commercial Samples (Q2) Precision 5/2016 JD 420 88 4.02 63.6 n/s
2015 Commercial Samples (Q1) Precision 4/2016 JD 379 79 3.36 65.8 n/s
2015 Spring Survey (201502) Precision 7/2015 JD 1037 98 2.62 84.7 n/s
2014 Autumn Survey (201404) Precision 4/2015 JD 868 98 2.90 84.7 n/s
2014 Commercial Samples (Q3-4) Precision 4/2015 JD 587 103 3.88 65.1 n/s
2014 Commercial Samples (Q2) Precision 3/2015 JD 333 69 2.95 69.6 n/s
2014 Commercial Samples (Q1) Precision 2/2015 JD 378 80 2.72 68.8 n/s
2014 Spring Survey (201402) Precision 2/2015 JD 911 97 3.81 71.1 n/s
2013 Autumn Survey (201304) Precision 12/2014 JD 726 95 4.96 74.7 n/s
2012 Autumn Survey (201204) Precision 12/2014 JD 748 98 5.25 67.4 n/s
2012 and 2013 Spring Surveys (201202 & 201302)

Precision
(fish <20cm)

12/2014 JD 487 72 4.82 84.7 n/s
2013 Spring Survey (201302) Precision 12/2014 JD 781 98 4.49 67.4 n/s
2012 Spring Survey (201202) Precision 11/2014 JD 1006 97 6.16 57.7 n/s
2013 Commercial Samples (Q4) Precision 11/2014 JD 472 94 4.50 66.0 n/s
2013 Commercial Samples (Q3) Precision 9/2014 JD 411 82 3.92 65.9 n/s
2011 Autumn Survey (201105) Precision 9/2014 JD 732 99 5.75 67.7 n/s
2013 Commercial Samples (Q2) Precision 8/2014 JD 437 84 4.37 59.5 n/s
2013 Commercial Samples (Q1) Precision 8/2014 JD 449 93 2.43 77.4 n/s
2012 Commercial Samples (Q4) Precision 7/2014 JD 428 87 6.00 56.3 n/s
2012 Commercial Samples (Q3) Precision 6/2014 JD 528 101 4.98 59.4 n/s
2012 Commercial Samples (Q2) Precision 5/2014 JD 292 63 1.72 79.4 n/s
2012 Commercial Samples (Q1) Precision 5/2014 JD 289 61 4.09 59.0 n/s
2011 Commercial Samples (Q4) Precision 4/2014 JD 364 74 3.26 71.6 n/s
2011 Commercial Samples (Q3) Precision 3/2014 JD 413 85 4.07 65.9 n/s
2011 Commercial Samples (Q2) Precision 3/2014 JD 463 95 2.71 68.4 n/s
2011 Commercial Samples (Q1) Precision 1/2014 JD 300 60 4.32 63.3 n/s
2011 Spring Survey (201102) Precision 1/2012 JD 709 97 5.60 69.1 n/s
2010 Autumn Survey (201004) Precision 9/2011 JD 605 100 4.68 72.0 n/s
2010 Commercial Samples (Q1) Precision 8/2011 JD 726 92 6.41 50.0 n/s
2008 Commercial Samples (Q1) Precision 11/2010 JD 266 57 2.87 77.2 n/s
2010 Spring Survey (201001) Precision 11/2010 JD 783 100 5.24 69.0 n/s
2009 Autumn Survey (200904) Precision 10/2010 JD vs. JB 650 179 0.67 96.1  
2009 Autumn Survey (200904) Precision 10/2010 JD 650 179 3.93 78.2 n/s
2007 Commercial Samples (Q4) Precision 8/2008 JB 296 76 2.02 80.3 n/s
2007 Commercial Samples (Q3) Precision 8/2008 JB 386 77 1.59 83.1 n/s
2007 Commercial Samples (Q2) Precision 8/2008 JB 233 78 1.33 85.9 n/s
2007 Commercial Samples (Q1) Precision 8/2008 JB 322 75 1.84 78.7 n/s
2006 Commercial Samples (Q4) Precision 8/2008 JB 264 77 1.60 84.4 n/s
2006 Commercial Samples (Q3) Precision 8/2008 JB 325 78 1.27 84.6 n/s
2006 Commercial Samples (Q2) Precision 8/2008 JB 336 77 1.39 87.0 n/s
2006 Commercial Samples (Q1) Precision 8/2008 JB 313 78 2.24 73.1 n/s
2005 Commercial Samples (Q4) Precision 8/2008 JB 330 78 2.04 78.2 n/s
2005 Commercial Samples (Q3) Precision 8/2008 JB 320 75 1.54 82.7 n/s
2005 Commercial Samples (Q2) Precision 8/2008 JB 237 77 1.98 79.2 n/s
2005 Commercial Samples (Q1) Precision 8/2008 JB 265 78 1.53 80.8 n/s
2008 Spring Survey (200803) Precision 8/2008 JB 615 69 2.00 84.1 n/s
2007 Autumn Survey (200709) Precision 8/2008 JB 598 70 2.42 85.7 n/s
2007 Spring Survey (200703) Precision 8/2008 JB 662 74 2.24 86.5 n/s
2006 Autumn Survey (200610) Precision 8/2008 JB 702 67 2.01 89.6 n/s
2006 Spring Survey (200604) Precision 8/2008 JB 715 72 1.35 91.7  
2005 Autumn Survey (200510) Precision 8/2008 JB 509 69 2.03 87.0 n/s
2004 Commercial Samples (Q4) & 2004 Autumn Survey (200407) Precision 8/2004 JB 432 161 1.69 85.7 n/s

Last updated by Northeast Fisheries Science Center on December 23, 2022

Age and Growth