Results of all QA/QC Exercises
for Pollock, Pollachius virens

Pollachius virens


Initials for each age reader are given. All samples were collected by the Northeast Fisheries Science Center (NEFSC). 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 Test Type Date Completed Age Reader Number Aged Number Tested CV (%) Agreement (%) Bias
2017 Commercial Samples (Q4) Precision 5/2018 JP 401 78

1.34

87.2 n/s
2017 Commercial Samples (Q3) Precision 4/2018 JP 681 99

0.00

100.0  
2017 Commercial Samples (Q2) Precision 3/2018 JP 568 101

0.13

98.0  
2017 Commercial Samples (Q1) Precision 3/2018 JP 631 96

0.61

92.7  
2017 Spring Survey (201702) Precision 8/2017 JP 171 44 0.00 100.0  
2016 Commercial Samples (Q4) Precision 4/2017 JP 427 80

0.00

100.0  
2016 Commercial Samples (Q3) Precision 4/2017 JP 684 93

0.22

98.9  
2016 Autumn Survey (201604) Precision 2/2017 JP 163 54 0.37 98.2  
2016 Commercial Samples (Q2) Precision 1/2017 JP 619 94

0.31

96.8  
2016 Commercial Samples (Q1) Precision 10/2016 JP 620 92

1.05

88.0 n/s
2016 Spring Survey (201602) Precision 9/2016 JP 391 78 0.14 98.7  
2015 Commercial Samples (Q4) Precision 4/2016 JP 745 101

0.19

98.0  
2015 Commercial Samples (Q3) Precision 4/2016 JP 693 104

1.06

89.4 n/s
2015 Autumn Survey (201504) Precision 3/2016 JP 270 58 0.00 100.0  
2015 Commercial Samples (Q2) Precision 1/2016 JP 682 99

0.51

92.9  
2015 Commercial Samples (Q1) Precision 12/2015 JP 724 96

1.05

88.5 n/s
2015 Spring Survey (201502) Precision 7/2015 JP 200 45 0.63 97.8  
2014 Commercial Samples (Q4) Precision 3/2015 JP 636 97

1.66

84.5 n/s
2014 Commercial Samples (Q3) Precision 3/2015 JP 549 99

2.96

79.8 0.011
2014 Autumn Survey (201404) Precision 3/2015 JP 234 51 0.00 100.0  
2014 Commercial Samples (Q2) Precision 12/2014 JP 604 97

2.17

79.4 n/s
2014 Commercial Samples (Q1) Precision 9/2014 JP 815 92

1.80

81.5 n/s
2013 Commercial Samples (Q1-4) Precision 8/2014 JP -- 93 1.69 81.9 n/s
2013 Commercial Samples (Q4) Precision 8/2014 JP vs. WD -- 147

2.49

79.6 n/s
2013 Commercial Samples (Q3) Precision 8/2014 JP vs. WD -- 148

2.95

72.3 n/s
2013 Commercial Samples (Q2) Precision 8/2014 JP vs. WD -- 148

3.44

68.9 n/s
2013 Commercial Samples (Q1) Precision 7/2014 JP vs. WD -- 109

3.84

62.4 n/s
2014 Spring Survey (201402) Precision 7/2014 JP 154 43 5.85 81.4 0.047
2013 Spring Survey (201302) Precision 7/2014 JP vs. WD 162 50 7.22 62.0 n/s
2013 Commercial Samples (Q4) Precision 3/2014 WD 629 99 1.85 84.9 n/s
2013 Commercial Samples (Q3) Precision 3/2014 WD 773 99 0.82 89.9 n/s
2013 Commercial Samples (Q2) Precision 2/2014 WD 569 100 1.68 79.0 0.025
2013 Commercial Samples (Q1) Precision 2/2014 WD 421 93 1.38 83.9 n/s
2012 Autumn Survey (201204) Precision 1/2014 WD 212 49 2.12 93.9  
2013 Spring Survey (201302) Precision 1/2014 WD 162 45 2.17 84.4 n/s
2012 Commercial Samples (Q4) Precision 10/2013 WD 575 95 1.10 88.4 n/s
2012 Commercial Samples (Q3) Precision 9/2013 WD 533 98 1.66 84.7 n/s
2012 Commercial Samples (Q2) Precision 8/2013 WD 512 98 1.71 81.6 n/s
2012 Commercial Samples (Q1) Precision 7/2013 WD 419 86 1.20 84.9 n/s
2011 Commercial Samples (Q4) Precision 6/2013 WD 485 97 1.80 81.4 n/s
2011 Commercial Samples (Q3) Precision 6/2013 WD 636 99 2.16 75.8 n/s
2011 Commercial Samples (Q2) Precision 4/2013 WD 570 95 1.43 84.2 n/s
2011 Commercial Samples (Q1) Precision 3/2013 WD 508 90 2.05 77.8 n/s
2011 Autumn Survey (201105) Precision 3/2013 WD 178 49 2.05 91.8  
2011 Spring Survey (201102) Precision 3/2013 WD 163 46 1.64 84.8 n/s
2010 Commercial Samples (Q4) Precision 10/2011 WD 633 105 3.28 70.5 n/s
2010 Commercial Samples (Q3) Precision 10/2011 WD 643 102 2.28 76.5 n/s
2010 Autumn Survey (201004) Precision 10/2011 WD 118 54 6.70 70.4 n/s
2010 Commercial Samples (Q2) Precision 7/2011 WD 486 98 2.44 77.6 n/s
2010 Commercial Samples (Q1) Precision 6/2011 WD 619 99 3.24 67.7 n/s
2010 Spring Survey (201001) Precision 1/2011 WD 118 60 2.59 85.0 n/s
2009 Spring Survey (200902) Precision 12/2010 WD 163 41 4.17 80.5 n/s
2009 Commercial Samples (Q1-4) Precision 4/2010 WD 1032 95 2.75 72.6 n/s
2008 Commercial Samples (Q1-4) Precision 4/2010 WD 1159 99 2.71 74.7 n/s
2007 Commercial Samples (Q4) Precision 3/2010 WD 534 99 3.80 66.7 n/s
2007 Commercial Samples (Q3) Precision 3/2010 WD 456 99 1.62 83.8 n/s
2007 Commercial Samples (Q2) Precision 3/2010 WD 296 80 2.21 77.5 n/s
2007 Commercial Samples (Q1) Precision 3/2010 WD 452 99 3.08 68.7 0.067
2006 Commercial Samples (Q4) Precision 3/2010 WD 545 100 3.03 69.0 n/s
2006 Commercial Samples (Q3) Precision 2/2010 WD 387 80 0.77 92.5  
2006 Commercial Samples (Q2) Precision 2/2010 WD 658 100 3.28 66.0 n/s
2006 Commercial Samples (Q1) Precision 2/2010 WD 395 80 3.74 62.5 n/s
2005 Commercial Samples (Q4) Precision 2/2010 WD 477 100 1.54 87.0 n/s
2005 Commercial Samples (Q3) Precision 2/2010 WD 536 100 3.07 73.0 n/s
2005 Commercial Samples (Q2) Precision 1/2010 WD 327 80 4.72 60.0 n/s
2005 Commercial Samples (Q1) Precision 1/2010 WD 256 70 4.29 65.7 n/s
2007 Spring Survey (200703) Precision 8/2007 WD 210 25 2.01 84.0 n/s
2006 Autumn Survey (200610) Precision 8/2007 WD 106 25 6.46 68.0 0.046

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