Results of all QA/QC Exercises
for Winter Flounder, Pseudopleuronectes americanus

Pseudopleuronectes americanus


Initials for each age reader are given. All samples were collected by the Northeast Fisheries Science Center (NEFSC) except where indicated otherwise. Stock indicates which stock area samples were taken from: Southern New England (SNE), Georges Bank (GB), or the Gulf of Maine (GOM); if no stock area is specified, samples were from all areas combined. Structure indicates which age structure was used: either Scales, Otoliths, or a combination of both (S+O). In tests where agreement is below 90%, bias indicates either the P-value of a Bowker’s test or ‘n/s’ (test not significant at the α = 0.05 level).

Sample Source StockAge StructureTest Type Date Completed Age Reader Number Aged Number Tested CV (%) Agreement (%) Bias
2018 Spring Survey (201802)   Otoliths Precision 9/2018 CF 423 90 2.29 87.8 n/s
2018 Spring Survey (201802)   Otoliths Precision 9/2018 CF vs. ER 423 89 3.19 80.9 0.020
2018 Spring Survey (201802)   Otoliths Precision 8/2018 CF vs. ER -- 100 0.83 94.0  
2017 Spring Survey (201702)   Otoliths Precision 7/2018 ER 795 100 1.84 87.0 n/s
2017 Commercial Samples (Q4)   Otoliths Precision 5/2018 ER 460 89 1.91 86.5 n/s
2017 Commercial Samples (Q3)   Otoliths Precision 5/2018 ER 538 96 2.11 82.3 n/s
2017 Commercial Samples (Q2)   Otoliths Precision 5/2018 ER 814 101 2.79 79.2 n/s
2017 Commercial Samples (Q1)   Otoliths Precision 4/2018 ER 246 58 3.24 75.9 n/s
2016 Spring Survey (201602)   Otoliths Precision 10/2016 ER 902 96 1.92 87.5 n/s
2015 Autumn Survey (201504)   Otoliths Precision 4/2016 ER 552 96 2.08 84.4 n/s
2015 Commercial Samples (Q1-4)   Otoliths Precision 4/2016 ER 768 98 0.89 91.8  
2015 Spring Survey (201502)   Otoliths Precision 7/2015 ER 734 98 2.18 82.7 n/s
2014 Spring Survey (201402)   Otoliths Precision 4/2015 ER vs. GT -- 99 4.63 75.8 n/s
2014 Autumn Survey (201404)   Otoliths Precision 1/2015 GT 773 89 3.53 80.9 n/s
2014 Commercial Samples (Q2)   S+O Precision 11/2014 GT 1078 93 1.86 83.9 n/s
2014 Commercial Samples (Q1)   S+O Precision 9/2014 GT 391 78 3.85 69.2 n/s
2014 Spring Survey (201402)   Otoliths Precision 7/2014 GT 964 95 3.27 88.4 n/s
2013 Commercial Samples (Q3-4)   S+O Precision 2/2014 GT 946 95 3.09 79.0 n/s
2013 Autumn Survey (201304)   Otoliths Precision 1/2014 GT 654 84 7.68 78.6 n/s
2013 Commercial Samples (Q1-2)   S+O Precision 11/2013 GT 1121 97 3.56 72.2 n/s
2013 Spring Survey (201302)   Otoliths Precision 8/2013 GT 1138 98 4.80 76.5 n/s
2012 Commercial Samples (Q4)   S+O Precision 2/2013 GT 607 95 4.42 65.3 n/s
2012 Commercial Samples (Q1-3)   S+O Precision 1/2013 GT 1447 95 5.77 61.1 n/s
2012 Autumn Survey (201204)   Otoliths Precision 1/2013 GT 1078 99 7.52 66.7 0.007
2012 Spring Survey (201202)   Otoliths Precision 1/2013 GT 1209 99 5.20 73.7 n/s
2011 Spring Survey (201102)   Otoliths Precision 1/2013 GT 924 100 4.98 75.0 n/s
2011 Massachusetts Spring Survey (201191)   Otoliths Precision 11/2011 GT 512 91 4.38 75.8 n/s
2007 Autumn Survey (200709)   Otoliths Precision 6/2008 GT vs. JB 473 467 3.23 89.3 0.021
2007 Spring Survey (200703)   Otoliths Precision 8/2007 GT vs. JB 480 477 3.15 86.0 0.003
2004 Autumn Survey (200407) & 2005 Spring Survey (200503) SNE & GOM Otoliths Precision 8/2005 JB 580 110 1.59 93.6  
2004 Commercial Samples (Q1 & Q3)   Scales Precision 8/2005 JB 1475 115 2.81 79.1 n/s

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