Results of all QA/QC Exercises
for Silver Hake, Merluccius bilinearis

Merluccius bilinearis


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
2016 Commercial Samples (Q3) Precision 12/2017 CK 625 85 3.13 88.2 n/s
2016 Commercial Samples (Q2) Precision 11/2017 CK 808 83 0.91 95.2  
2016 Spring Survey (201602) Precision 11/2017 CK 1802 90 0.57 96.7  
2016 Commercial Samples (Q1) Precision 3/2017 CK 1100 91 2.12 90.1  
2015 Autumn Survey (201504) Precision 11/2016 CK 1319 93 1.92 91.4  
2015 Commercial Samples (Q4) Precision 9/2016 CK 656 88 2.17 93.2  
2015 Commercial Samples (Q3) Precision 8/2016 CK 675 99 1.85 91.9  
2015 Commercial Samples (Q2) Precision 6/2016 CK 757 95 2.25 90.5  
2015 Spring Survey (201502) Precision 12/2015 CK 1481 91 1.95 92.3  
2015 Commercial Samples (Q1) Precision 11/2015 CK 990 93 0.69 96.8  
2014 Commercial Samples (Q4) Precision 5/2015 CK 476 87 2.56 92.0  
2014 Autumn Survey (201404) Precision 4/2015 CK 1161 101 1.68 96.0  
2014 Spring Survey (201402) Precision 10/2014 CK* 1440 97 1.90 91.8  
2013 Autumn Survey (201304) Precision 2/2014 CK* 1101 99 2.49 92.9  
2013 Spring Survey (201302) Precision 1/2014 CK* 1297 100 2.03 91.0  
2012 Spring Survey (201202) Precision 1/2014 CK* 1451 100 1.99 93.0  
2012 Autumn Survey (201204) Precision 11/2013 CK* 1246 99 5.25 86.9 n/s
2011 Autumn Survey (201105) Precision 8/2013 CL 1089 99 3.05 92.9  
2011 Spring Survey (201102) Precision 12/2011 CL 1176 100 2.16 91.0  
2010 Autumn Survey (201004) Precision 7/2011 CL 934 109 6.28 86.2 n/s
2006 Spring Survey (200604) Precision 10/2010 LDW 769 134 2.05 92.5  
2005 Autumn Survey (200510) Precision 10/2010 LDW 717 117 2.91 93.2  
2004 Spring Survey (200402) Precision 10/2005 KL vs. NS 1076 99 5.21 76.8 0.002
2004 Spring Survey (200402) Precision 10/2005 KL 1076 99 1.83 91.9  

*CL married to become CK in late 2013.


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(File Modified Dec. 05 2017)