Results of all QA/QC Exercises
for Butterfish, Peprilus triacanthus

Peprilus triacanthus

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
2009 Spring Survey (200902) Precision 9/2009 LD-W 75 3.80 85.3 n/s
2003 Autumn Survey (200306) Precision 6/2009 LD-W 75 4.08 85.3 0.04
2004 Autumn Survey (200407) Precision 5/2009 LD-W 72 13.51 80.6 n/s
2005 Autumn Survey (200510) Precision 4/2009 LD-W 73 14.01 72.6 0.035
2006 Autumn Survey (200610) Precision 4/2009 LD-W 100 3.49 93.0  
2007 Autumn Survey (200709) Precision 4/2009 LD-W 74 8.47 83.8 n/s
2003 Spring Survey (200303) Precision 4/2009 LD-W vs. NM 156 5.60 84.0 n/s
2005 Spring Survey (200503) Precision 4/2009 LD-W 49 5.48 77.6 0.012
2006 Spring Survey (200604) Precision 4/2009 LD-W 49 4.00 85.7 n/s
2008 Autumn Survey (200807) Precision 3/2009 LD-W 73 11.94 75.3 n/s
2008 Spring Survey (200803) Precision 3/2009 LD-W 75 2.17 93.3  
2007 Spring Survey (200703) Precision 3/2009 LD-W 49 7.04 75.5 n/s
1984 Spring Survey (198402), 1984 Autumn Survey (198405), and 1984 Commercial Samples (all quarters) Calibration 1/2009 LD-W 769 2.74 93.4  


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