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Black Sea Bass: QA/QC Exercise Results

Results of the QA/QC exercised for ageing black sea bass.

Josh Dayton (JD) has been working with Black Sea Bass at NOAA since 2008, and has 2 years of prior experience. Whole otoliths are viewed with reflected light.

In tests where agreement is below 90%, bias indicates either the P-value of a symmetry test or ‘n/s’ (test not significant at the α = 0.05 level). The Evans & Hoenig test was used to test bias starting 1/2022; prior to that, a Bowker's test was used. Structure indicates which part of the fish was used: Scales, Otoliths, or a combination of both (S+O); one test compared the two structures.

Sample Source Struc-ture Test Type Date Com-pleted Age Reader Number Aged Number Tested CV (%) Agree-ment (%) Bias
2022 Commercial Samples (Q1) Otoliths Precision 1/2023 JD 463 90 1.73 87.8 n/s
2022 Spring Survey (202202) Otoliths Precision 8/2022 JD 332 66 0.97 93.9  
2021 Commercial Samples (Q4) Otoliths Precision 8/2022 JD 505 94 3.32 75.5 n/s
2021 Commercial Samples (Q2-3) Otoliths Precision 8/2022 JD 325 53 3.66 77.4 n/s
2021 Commercial Samples (Q1) Otoliths Precision 8/2022 JD 905 100 4.15 74.0 n/s
2021 Autumn Survey (202104) Otoliths Precision 5/2022 JD 407 80 4.87 86.3 n/s
2021 Spring Survey (202102) Otoliths Precision 5/2022 JD 279 50 5.88 70.0 n/s
2020 Spring Survey (202002) Otoliths Precision 11/2021 JD 269 52 1.46 90.4  
2020 Commercial Samples (Q4) Otoliths Precision 11/2021 JD 465 93 2.57 84.9 n/s
2020 Commercial Samples (Q3) Otoliths Precision 11/2021 JD 741 100 4.49 69.0 0.04
2020 Commercial Samples (Q2) Otoliths Precision 11/2021 JD 340 63 3.65 76.2 n/s
2020 Commercial Samples (Q1) Otoliths Precision 11/2021 JD 613 95 1.68 87.4 n/s
2019 Commercial Samples (Q4) Otoliths Precision 8/2020 JD 747 100 3.48 75.0 n/s
2019 Commercial Samples (Q3) Otoliths Precision 4/2020 JD 808 100 1.02 92.0  
2019 Commercial Samples (Q2) Otoliths Precision 2/2020 JD 843 100 1.25 90.0  
2019 Commercial Samples (Q1) Otoliths Precision 11/2019 JD 726 100 2.36 84.0 n/s
2019 Spring Survey (201902) Otoliths Precision 7/2019 JD 175 43 1.20 93.0  
2018 Commercial Samples (Q4) Otoliths Precision 5/2019 JD 949 81 2.42 86.4 n/s
2018 Commercial Samples (Q3) Otoliths Precision 4/2019 JD 738 90 2.11 84.4 n/s
2018 Autumn Survey (201804) Otoliths Precision 3/2019 JD 390 82 0.62 96.3  
2018 Commercial Samples (Q2) Otoliths Precision 12/2018 JD 762 83 2.32 85.5 n/s
2018 Commercial Samples (Q1) Otoliths Precision 12/2018 JD 638 78 2.22 88.5 n/s
2018 Spring Survey (201802) Otoliths Precision 6/2018 JD 153 35 1.47 91.4  
2017 Commercial Samples (Q4) Otoliths Precision 6/2018 JD 526 84 4.55 77.4 n/s
2017 Commercial Samples (Q3) Otoliths Precision 3/2018 JD 311 75 3.28 76.0 n/s
2017 Commercial Samples (Q2) Otoliths Precision 2/2018 JD 416 72 3.02 83.3 n/s
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 Inter-Structure 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

Last updated by Northeast Fisheries Science Center on January 30, 2023

Age and Growth