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 NEFSC unless otherwise noted. Bowker’s test results either show the P-value, ‘n/s’ (not significant at the α = 0.05 level), or are left blank where the test was not applicable.

Sample Source Test Type Date Completed Age Reader Sample Size CV (%) Agreement (%) Bowker's test
2008 Autumn Survey (200807) Precision 2/2009 SE vs. BJ 197 2.34 84.3 n/s
2008 Spring Survey (200803) Precision 2/2009 SE vs. BJ 210 3.09 79.5 n/s
2007 Autumn Survey (200709) Precision 1/2009 SE vs. BJ 255 1.93 86.7 n/s
2006 Autumn Survey (200610) Precision 1/2009 SE vs. BJ 173 2.54 80.3 0.02
2006 Spring Survey (200604) Precision 1/2009 SE vs. BJ 270 1.38 88.9 n/s
2006 Winter Survey (200603) Precision 1/2009 SE vs. BJ 285 0.99 91.6  
2008 Acoustic Survey (200813) Precision 1/2009 SE vs. BJ 139 3.46 76.3 0.02
2007 Acoustic Survey (200710) Precision 12/2008 SE vs. BJ 84 1.15 90.5  
2006 Acoustic Survey (200611) Precision 12/2008 SE vs. BJ 80 1.85 83.8 n/s
2005 Acoustic Survey (200511) Precision 12/2008 SE vs. BJ 107 3.20 78.5 n/s
2007 Spring Survey (200703) Precision 9/2007 SE vs. BJ 1039 1.45 88.7 n/s
2007 Winter Survey (200702) Precision 7/2007 SE vs. BJ 451 1.92 85.4 n/s
2005 Autumn Survey (200510) Precision 3/2006 BJ 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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 (Modified May. 07 2009)