Results of all QA/QC Exercises
for Black Sea Bass, Centropristis striata

Centropristis striata


Initials for each age reader are given. All samples were collected by the Northeast Fisheries Science Center (NEFSC). Structure indicates which age structure was used: either Scales, Otoliths, or a combination of both (S+O); one test was conducted to determine comparability of the two structures. 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 StructureTest Type Date Completed Age Reader Number Aged Number Tested CV (%) Agreement (%) Bias
2017 Commercial Samples (Q1) Otoliths Precision 12/2017 JD 625 68 2.46 85.3 n/s
2017 Spring Survey (201702) Otoliths Precision 7/2017 JD 420 79 1.47 91.1  
2016 Commercial Samples (Q3-4) Otoliths Precision 7/2017 JD 400 77 5.01 74.0 n/s
2016 Autumn Survey (201604) Otoliths Precision 1/2017 JD 348 67 0.00 100.0  
2016 Spring Survey (201602) Otoliths Precision 12/2016 JD 456 84 1.60 91.7  
2016 Commercial Samples (Q2) Otoliths Precision 11/2016 JD 817 96 2.31 86.5 n/s
2016 Commercial Samples (Q1) Otoliths Precision 11/2016 JD 961 54 2.41 85.2  
2015 Commercial Samples (Q3-4) S+O Precision 4/2016 JD 400 79 1.48 91.1  
2015 Commercial Samples (Q2) Scales Precision 3/2016 JD 410 76 1.05 94.7  
2015 Commercial Samples (Q1) Scales Precision 3/2016 JD 428 68 1.27 92.7  
2015 Autumn Survey (201504) Otoliths Precision 2/2016 JD 502 98 6.68 85.7 n/s
2014 Commercial Samples (Q3-4) Scales Precision 1/2016 JD 825 95 4.19 73.7 n/s
2014 Commercial Samples (Q2) Scales Precision 1/2016 JD 843 90 3.49 82.2 n/s
2014 Commercial Samples (Q1) Scales Precision 12/2015 JD 313 60 0.49 96.7  
2015 Spring Survey (201502) Otoliths Precision 11/2015 JD 166 36 2.09 88.9 n/s
2013 & 2014 Autumn Surveys (201304 & 201404) Otoliths Precision 8/2015 JD 688 91 2.38 87.9 n/s
2014 Spring Survey (201402) S+O Precision 3/2015 JD 264 61 1.08 93.4  
2013 Commercial Samples (Q3-4) Scales Precision 1/2015 JD 624 98 4.06 76.5 n/s
2013 Spring Survey (201302) S+O Precision 8/2014 JD 441 89 0.54 97.8  
2013 Commercial Samples (Q2) Scales Precision 7/2014 JD 685 95 2.19 89.5 n/s
2013 Commercial Samples (Q1) Scales Precision 5/2014 JD 525 96 1.60 90.6  
2012 Autumn Survey (201204) S+O Precision 5/2014 JD 466 86 0.71 96.5  
2012 Commercial Samples (Q1-Q4) Scales Precision 12/2013 JD 2481 101 3.97 78.2 n/s
2012 Spring Survey (201202) Otoliths vs. Scales Compare Structures 4/2013 JD -- 85 4.55 75.3 n/s
2012 Spring Survey (201202) Scales Precision 2/2013 JD 270 96 2.75 85.4 n/s
2011 Commercial Samples (Q1-Q4) Scales Precision 5/2012 JD 2027 143 1.75 91.6  
2011 Spring Survey (201102) S+O Precision 3/2012 JD 140 60 3.29 86.7 0.047
2010 Spring Survey (201001) Scales Precision 2/2011 JD 305 50 0.51 96.0  
1999, 2002, & 2006 Winter Surveys Scales Precision 2/2011 JD 720 98 3.89 81.6 n/s


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(File Modified Dec. 13 2017)