Results of all QA/QC Exercises
for Yellowtail Flounder, Limanda ferruginea

Limanda ferruginea


Initials for each age reader are given. All samples were collected by the Northeast Fisheries Science Center (NEFSC) except where indicated otherwise. 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 Structure Test Type Date Completed Age Reader Number Aged Number Tested CV (%) Agreement (%) Bias
2018 Massachusetts Spring Survey (201891) Scales Precision 9/2018 SE 345 68 2.44 86.8 n/s
2018 Commercial Samples (Q1) Otoliths Precision 8/2018 SE 236 54 1.58 92.6  
2018 Commercial Samples (Q1) Scales Precision 8/2018 SE 387 74 1.30 91.9  
2018 Spring Survey (201802) Otoliths Precision 6/2018 SE 115 50 1.91 88.0 n/s
2018 Spring Survey (201802) Scales Precision 6/2018 SE 274 59 1.04 93.2  
2017 Commercial Samples (Q4) Scales Precision 3/2018 SE 337 67 0.57 95.5  
2017 Commercial Samples (Q3) Scales Precision 2/2018 SE 406 83 1.94 88.0 n/s
2017 Massachusetts Autumn Survey (201792) Scales Precision 2/2018 SE 274 48 1.55 91.7  
2017 Autumn Survey (201704) Scales Precision 1/2018 SE 307 59 2.97 88.1 n/s
2017 Commercial Samples (Q2) Scales Precision 12/2017 SE 848 97 2.85 83.5 n/s
2017 Commercial Samples (Q1) Scales Precision 8/2017 SE 555 97 0.90 94.8  
2017 Massachusetts Spring Survey (201791) Scales Precision 8/2017 SE 264 57 1.13 94.7  
2017 Spring Survey (201702) Scales Precision 6/2017 SE 551 95 1.30 93.7  
2016 Massachusetts Autumn Survey (201692) Scales Precision 4/2017 SE 147 35 0.81 97.1  
2016 Commercial Samples (Q4) Scales Precision 4/2017 SE 854 100 2.40 89.0 n/s
2016 Commercial Samples (Q3) Scales Precision 2/2017 SE 235 53 3.57 84.9 n/s
2016 Autumn Survey (201604) Scales Precision 1/2017 SE 563 99 2.70 93.9  
2016 Commercial Samples (Q2) Scales Precision 12/2016 SE 996 100 1.94 88.0 n/s
2016 Massachusetts Spring Survey (201691) Scales Precision 10/2016 SE 370 65 0.44 98.5  
2016 Commercial Samples (Q1) Scales Precision 10/2016 SE 1106 100 1.60 91.0  
2016 Spring Survey (201602) Scales Precision 8/2016 SE 672 97 1.55 92.8  
2016 Canadian (DFO) Spring Survey (TEL2016002) Scales Precision 5/2016 SE 153 30 0.52 96.7  
2015 Commercial Samples (Q4) Scales Precision 4/2016 SE 905 98 2.59 85.7 n/s
2015 Massachusetts Autumn Survey (201592) Scales Precision 3/2016 SE 249 54 2.79 92.6  
2015 Commercial Samples (Q3) Scales Precision 3/2016 SE 640 96 1.92 90.6  
2015 Autumn Survey (201504) Scales Precision 12/2015 SE 459 88 2.14 97.7  
2015 Commercial Samples (Q2) Scales Precision 10/2015 SE 812 100 1.36 92.0  
2015 Massachusetts Spring Survey (201591) Scales Precision 8/2015 SE 247 55 0.73 96.4  
2015 Commercial Samples (Q1) Scales Precision 8/2015 SE 650 91 1.55 91.2  
2015 Spring Survey (201502) Scales Precision 6/2015 SE 638 98 1.14 92.9  
Yellowtail Reference Collection Scales Accuracy 4/2015 SE -- 68 1.93 86.8  
2014 Massachusetts Autumn Survey (201492) Scales Precision 4/2015 SE 183 45 1.68 95.6  
2014 Commercial Samples (Q4) Scales Precision 3/2015 SE 627 92 2.52 87.0 n/s
2014 Commercial Samples (Q3) Scales Precision 2/2015 SE 208 45 1.33 93.3  
2014 Autumn Survey (201404) Scales Precision 1/2015 SE 580 87 1.21 94.3  
2014 Commercial Samples (Q2) Scales Precision 12/2014 SE 648 96 0.89 94.8  
2014 Commercial Samples (Q1) Scales Precision 11/2014 SE 515 98 0.61 96.9  
2014 Massachusetts Spring Survey (201491) Scales Precision 9/2014 SE 194 48 2.52 89.6 n/s
2014 Spring Survey (201402) Scales Precision 7/2014 SE 713 96 0.51 97.9  
2013 Massachusetts Autumn Survey (201392) Scales Precision 5/2014 SE 179 44 0.92 95.5  
2013 Massachusetts Spring Survey (201391) Scales Precision 4/2014 SE 192 46 1.06 93.5  
2013 Commercial Samples (Q4) Scales Precision 4/2014 SE 559 97 1.71 88.7 n/s
2013 Commercial Samples (Q3) Scales Precision 3/2014 SE 597 96 1.08 93.8  
2013 Autumn Survey (201304) Scales Precision 2/2014 SE 586 95 1.98 91.6  
2013 Commercial Samples (Q2) Scales Precision 1/2014 SE 867 99 1.17 93.9  
2013 Yellowtail Cooperative Survey (201350 & 201351) Scales Precision 12/2013 SE 993 100 3.11 86.0 n/s
2013 Commercial Samples (Q1) Scales Precision 9/2013 SE 913 101 1.59 90.1  
2013 Canadian (DFO) Spring Survey (NED2013002) Scales Precision 8/2013 SE 159 43 2.99 83.7 n/s
2013 Spring Survey (201302) Scales Precision 7/2013 SE 973 100 2.12 88.0 n/s
2012 Massachusetts Autumn Survey (201292) Scales Precision 2/2013 SE 153 51 1.26 94.1  
2012 Commercial Samples (Q4) Scales Precision 2/2013 SE 1387 102 2.48 87.3 n/s
2012 Autumn Survey (201204) Scales Precision 2/2013 SE 712 108 2.58 87.0 n/s
2012 Commercial Samples (Q3) Scales Precision 12/2012 SE 742 99 2.15 88.9 n/s
2012 Commercial Samples (Q2) Scales Precision 11/2012 SE 763 97 2.13 87.6 n/s
2012 Massachusetts Spring Survey (201291) Scales Precision 9/2012 SE 162 51 1.41 92.2  
2012 Commercial Samples (Q1) Scales Precision 8/2012 SE 1253 100 2.55 83.0 n/s
2011 Massachusetts Autumn Survey (201192) Scales Precision 6/2012 SE 201 54 1.12 94.4  
2012 Spring Survey (201202) Scales Precision 6/2012 SE 606 98 1.54 90.8  
2012 Canadian (DFO) Spring Survey (NED2012002) Scales Precision 5/2012 SE 505 97 3.04 82.5 n/s
2011 Autumn Survey (201105) Scales Precision 4/2012 SE 775 100 1.82 92.0  
2011 Commercial Samples (Q4) Scales Precision 3/2012 SE 1047 99 0.77 96.0  
2011 Commercial Samples (Q3) Scales Precision 2/2012 SE 703 100 1.38 93.0  
2011 Commercial Samples (Q2) Scales Precision 12/2011 SE 1177 99 1.00 93.9  
2011 Massachusetts Spring Survey (201191) Scales Precision 11/2011 SE 281 75 2.20 89.3 n/s
2011 Commercial Samples (Q1) Scales Precision 7/2011 SE 1496 103 1.88 86.4 n/s
2011 Spring Survey (201102) Scales Precision 6/2011 SE 428 95 2.01 88.4 n/s
2010 Massachusetts Autumn Survey (201092) Scales Precision 4/2011 SE 288 75 2.05 92.0  
2011 Canadian (DFO) Spring Survey (NED2011002) Scales Precision 4/2011 SE 359 100 3.32 82.0 n/s
2010 Commercial Samples (Q4) Scales Precision 3/2011 SE 1042 96 1.04 94.8  
2010 Commercial Samples (Q3) Scales Precision 2/2011 SE 816 100 3.79 78.0 n/s
2010 Commercial Samples (Q2) Scales Precision 1/2011 SE 1212 104 2.30 86.5 n/s
2010 Commercial Samples (Q1) Scales Precision 2/2011 SE 1206 99 1.54 89.9 n/s
2010 Autumn Survey (201004) Scales Precision 1/2011 SE 707 98 1.64 92.9  
2010 Spring Survey (201001) Scales Precision 6/2010 SE 1348 99 0.50 96.0  
2010 Massachusetts Spring Survey (201091) Scales Precision 11/2010 SE 422 73 1.35 94.5  
2010 Canadian (DFO) Spring Survey (NED2010001) Scales Precision 2010 SE 384 75 2.70 84.0 n/s
2009 Commercial Samples (Q4) Scales Precision 5/2010 SE 675 99 3.57 82.8 0.037
2009 Commercial Samples (Q3) Scales Precision 2/2010 SE 1027 104 2.12 89.4 n/s
2009 Autumn Survey (200904) Scales Precision 1/2010 SE 1007 100 1.69 92.0  
2009 Commercial Samples (Q2) Scales Precision 12/2009 SE 1246 123 1.39 91.9  
2009 Commercial Samples (Q1) Scales Precision 1/2010 SE 1194 100 1.48 92.0  
2008 Commercial Samples (Q4) Scales Precision 5/2009 SM* 1056 105 4.48 81.9 n/s
2008 Commercial Samples (Q3) Scales Precision 4/2009 SM* 1225 100 4.55 80.0 0.016
2008 Commercial Samples (Q2) Scales Precision 3/2009 SE vs. SM* 1087 99 3.12 82.8 n/s
2008 Commercial Samples (Q2) Scales Precision 3/2009 SM* 1087 99 3.42 81.8 0.003
2008 Commercial Samples (Q1) Scales Precision 12/2008 SP 1090 102 2.84 85.3 n/s
2008 Autumn Survey (200807) Scales Precision 12/2008 SP 508 75 5.51 78.7 0.024
Yellowtail Reference Collection Scales Accuracy 6/2008 SP -- 79 1.62 91.1  
2008 Spring Survey (200803) Scales Precision 5/2008 SP 483 75 2.05 89.3 n/s
2007 Commercial Samples (Q4) Scales Precision 5/2008 SP 1370 100 1.83 91.0  
2007 Commercial Samples (Q3) Scales Precision 5/2008 SP 1140 100 6.54 75.0 0.006
2007 Commercial Samples (Q2) Scales Precision 4/2008 SP 969 100 3.29 82.0 n/s
2007 Commercial Samples (Q1) Scales Precision 4/2008 SP 1143 93 3.72 80.6 0.006
2007 Autumn Survey (200709) Scales Precision 12/2007 SP 499 75 3.93 80.0 n/s
Yellowtail Reference Collection Scales Accuracy 5/2007 SP -- 75 1.16 93.3  
2007 Spring Survey (200703) Scales Precision 5/2007 SP 540 75 2.41 88.0 n/s
2006 Commercial Samples (Q4) Scales Precision 5/2007 SP 1010 70 4.94 78.6 0.005
2006 Commercial Samples (Q3) Scales Precision 5/2007 SP 1184 75 1.97 90.7  
2006 Commercial Samples (Q2) Scales Precision 4/2007 SP 789 75 2.35 84.0 n/s
2006 Commercial Samples (Q1) Scales Precision 3/2007 SP 1175 70 3.25 78.6 n/s
2006 Autumn Survey (200610) Scales Precision 2/2007 SP 569 75 3.57 88.0 n/s
2006 Spring Survey (200604) Scales Precision 5/2006 SP 347 50 1.56 90.0  
2005 Commercial Samples (Q1-4) Scales Precision 5/2006 SP 2785 79 2.48 87.3 n/s
2005 Autumn Survey (200510) Scales Precision 3/2006 SP 246 54 5.05 81.5 n/s
2004 Commercial Samples (Q1-4), 2004 Autumn Survey (200407), & 2005 Spring Survey (200503) Scales Precision 6/2005 SP 3022 100 6.11 73.0 n/s
2004 Commercial Samples (Q1-4), 2004 Autumn Survey (200407), & 2005 Spring Survey (200503) Scales Precision 6/2005 VS 3022 100 6.64 71.0 n/s
2005 Canadian (DFO) Spring Survey (NED2005001) Scales Precision 4/2005 VS 427 100 1.79 92.0  
2004 Canadian (DFO) Commercial Samples Scales Precision 1/2005 SP vs. VS 162 162 4.83 74.7 n/s
2004 Canadian (DFO) Commercial Samples Scales Precision 1/2005 VS 167 167 2.52 86.2 n/s
2004 Canadian (DFO) Spring Survey (TEM2004004) Scales Precision 2004 VS -- 97 3.97 79.4 n/s
2004 Winter Survey (200401) Scales Precision 5/2004 VS 164 18 0.87 94.4  
2003 Autumn Survey (200306) Scales Precision 5/2004 VS 290 82 4.36 81.7 n/s

*SP married to become SM early in 2009.


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