Results of all QA/QC Exercises
for Witch Flounder, Glyptocephalus cynoglossus

Glyptocephalus cynoglossus


Initials for each age reader are given. All samples were collected by the NEFSC. 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
2007 Commercial Samples (Q4) Precision 8/2008 JB 51 1.92 78.4 n/s
2007 Commercial Samples (Q3) Precision 8/2008 JB 50 1.60 80.0 n/s
2007 Commercial Samples (Q2) Precision 8/2008 JB 50 1.25 84.0 n/s
2007 Autumn Survey (200709) Precision 7/2008 JB 71 1.35 91.5  
2008 Spring Survey (200803) Precision 6/2008 JB 76 1.45 88.2 n/s
2007 Commercial Samples (Q1) Precision 11/2007 JB 86 1.68 77.9 n/s
2006 Commercial Samples (Q4) Precision 10/2007 JB 63 1.04 85.7 n/s
2006 Commercial Samples (Q3) Precision 10/2007 JB 59 1.43 83.1 n/s
2006 Commercial Samples (Q2) Precision 10/2007 JB 59 1.13 84.7 n/s
2006 Commercial Samples (Q1) Precision 10/2007 JB 62 1.03 83.9 n/s
2005 Commercial Samples (Q4) Precision 10/2007 JB 58 1.28 82.8 n/s
2005 Commercial Samples (Q3) Precision 10/2007 JB 52 0.96 86.5 n/s
2005 Commercial Samples (Q2) Precision 10/2007 JB 56 1.06 83.9 n/s
2005 Commercial Samples (Q1) Precision 10/2007 JB 47 0.95 87.2 n/s
2007 Spring Survey (200703) Precision 7/2007 JB 75 1.82 86.7 n/s
2006 Autumn Survey (200610) Precision 3/2007 JB 65 1.21 92.3  
2006 Spring Survey (200604) Precision 3/2007 JB 102 1.25 90.2  
2005 Spring Survey (200503) Calibration 2/2007 JB 76 2.08 80.3 n/s
2004 Commercial Samples (Q2 & Q4) and 2005 Spring Survey (200503) Precision 8/2005 JB 122 1.55 80.3 n/s


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