Results of all QA/QC Exercises
for Atlantic Herring, Clupea harengus

Clupea harengus


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 Test Type Date Completed Age Reader Number Aged Number Tested CV (%) Agreement (%) Bias
2018 Spring Survey (201802) Precision 7/2018 KR 522 87 0.91 90.8  
2017 Commercial Samples (Q1 & 4) Exchange Spring 2018 KR vs. DK -- 154 1.24 90.9  
2017 Autumn Survey (201704) Precision 2/2018 KR 406 85 0.80 94.1  
2017 Spring Survey (201702) Precision 12/2017 KR 1020 102 0.56 95.1  
2016 Autumn Survey (201604) Precision 3/2017 KR 662 93 1.25 90.3  
2016 Spring Survey (201602) Precision 12/2016 KR vs. BJ 793 95 2.31 84.2 n/s
2016 Spring Survey (201602) Precision 11/2016 BJ 793 95 0.68 95.8  
2015 Autumn Survey (201504) Precision 5/2016 BJ 941 96 0.33 97.9  
2015 Spring Survey (201502) Precision 1/2016 BJ 839 100 0.00 100.0  
2014 Autumn Survey (201404) Precision 4/2015 BJ 828 98 0.24 98.0  
2014 Spring Survey (201402) Precision 1/2015 BJ 1152 98 1.00 92.9  
2013 Autumn Survey (201304) Precision 10/2014 BJ 675 99 0.76 97.0  
2013 Spring Survey (201302) Precision 8/2014 BJ 1521 101 2.95 83.2 0.005
2012 Autumn Survey (201204) Precision 7/2014 BJ 704 98 1.57 90.8  
2012 Spring Survey (201202) Precision 6/2014 BJ 1154 99 0.98 91.9  
2012 Acoustic Survey (201206) Precision 6/2014 BJ 540 98 0.92 93.9  
2011 Autumn Survey (201105) Precision 8/2012 BJ 579 100 3.12 81.0 n/s
2011 Acoustic Survey (201106) Precision 6/2012 BJ 657 98 1.32 91.8  
2011 Spring Survey (201102) Precision 1/2012 BJ 1713 100 1.14 93.0  
2010 Autumn Survey (201004) Precision 12/2011 BJ 861 104 0.59 95.2  
2010 Spring Survey (201001) Precision 12/2010 BJ 1802 106 3.30 80.2 0.007
2009 Autumn Survey (200904) Precision 6/2010 BJ 895 115 0.92 93.0  
2009 Acoustic Survey (200905) Precision 5/2010 BJ 387 112 1.72 90.2  
2009 Spring Survey (200902) Precision 4/2010 BJ 1609 130 2.15 86.2 n/s
2008 Autumn Survey (200807) Precision 2/2009 SE vs. BJ 726 197 2.34 84.3 n/s
2008 Spring Survey (200803) Precision 2/2009 SE vs. BJ 801 210 3.09 79.5 n/s
2007 Autumn Survey (200709) Precision 1/2009 SE vs. BJ 938 255 1.93 86.7 n/s
2006 Autumn Survey (200610) Precision 1/2009 SE vs. BJ 623 173 2.54 80.3 0.020
2006 Spring Survey (200604) Precision 1/2009 SE vs. BJ 960 270 1.38 88.9 n/s
2006 Winter Survey (200603) Precision 1/2009 SE vs. BJ 318 285 0.99 91.6  
2008 Acoustic Survey (200813) Precision 1/2009 SE vs. BJ 494 139 3.46 76.3 0.017
2007 Acoustic Survey (200710) Precision 12/2008 SE vs. BJ 295 84 1.15 90.5  
2006 Acoustic Survey (200611) Precision 12/2008 SE vs. BJ 302 80 1.85 83.8 n/s
2005 Acoustic Survey (200511) Precision 12/2008 SE vs. BJ 371 107 3.20 78.5 n/s
2007 Spring Survey (200703) Precision 9/2007 SE vs. BJ 1039 1039 1.45 88.7 n/s
2007 Winter Survey (200702) Precision 7/2007 SE vs. BJ 448 451 1.92 85.4 n/s
2005 Autumn Survey (200510) Precision 3/2006 BJ 1055 103 3.22 72.8 0.011
2004-2005 Maine DMR Commercial Samples (Q1-4) Precision 2/2006 BJ -- 84 2.12 81.0 n/s


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