Atlantic Mackerel, Scomber scombrus
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Sandy Sutherland (SJS) has been working with Atlantic Mackerel since 2009. Whole otoliths are mounted in clear resin and 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.
| Sample Source | Test Type | Date Completed | Age Reader | Number Aged | Number Tested | CV (%) | Agree-ment (%) | Bias |
|---|---|---|---|---|---|---|---|---|
| 2023 Spring Survey (202302) | Precision | 11/2023 | SJS | 119 | 32 | 0.00 | 100.0 | |
| 2022 Autumn Survey (202204) | Precision | 2/2023 | SJS | 203 | 41 | 3.45 | 97.6 | |
| 2022 Spring Survey (202202) | Precision | 9/2022 | SJS | 516 | 89 | 0.00 | 100.0 | |
| 2021 Commercial Samples (Q1) | Precision | 7/2022 | SJS | 123 | 39 | 1.18 | 92.3 | |
| 2021 Autumn Survey (202104) | Precision | 5/2022 | SJS | 259 | 40 | 0.00 | 100.0 | |
| 2021 Spring Survey (202102) | Precision | 1/2022 | SJS | 383 | 40 | 0.00 | 100.0 | |
| 2020 Commercial Samples (Q1) | Precision | 1/2021 | SJS | 270 | 66 | 0.19 | 98.5 | |
| 2019 Autumn Survey (201904) | Precision | 2/2020 | SJS | 187 | 40 | 0.00 | 100.0 | |
| 2019 Commercial Samples (Q1) | Precision | 11/2019 | SJS | 190 | 40 | 0.51 | 97.5 | |
| 2018 Commercial Samples (Q3-4) | Precision | 8/2019 | SJS | 355 | 50 | 3.26 | 90.0 | |
| 2019 Spring Survey (201902) | Precision | 7/2019 | SJS | 533 | 100 | 1.10 | 97.0 | |
| 2018 Autumn Survey (201804) | Precision | 2/2019 | SJS | 156 | 38 | 0.00 | 100.0 | |
| 2018 Commercial Samples (Q2) | Precision | 2/2019 | SJS | 148 | 38 | 0.00 | 100.0 | |
| 2018 Commercial Samples (Q1) | Precision | 12/2018 | SJS | 245 | 55 | 0.57 | 96.4 | |
| 2018 Spring Survey (201802) | Precision | 6/2018 | SJS | 367 | 75 | 1.02 | 96.0 | |
| 2017 Commercial Samples (Q4) | Precision | 3/2018 | SJS | 656 | 97 | 0.21 | 99.0 | |
| 2017 Commercial Samples (Q2-3) | Precision | 2/2018 | SJS | 420 | 89 | 0.53 | 98.9 | |
| 2017 Spring Survey (201702) | Precision | 10/2017 | SJS | 676 | 100 | 0.48 | 98.0 | |
| 2017 Commercial Samples (Q1) | Precision | 8/2017 | SJS | 371 | 70 | 1.49 | 95.7 | |
| 2016 Commercial Samples (Q2 & 4) | Precision | 4/2017 | SJS | 614 | 100 | 1.05 | 96.0 | |
| 2016 Autumn Survey (201604) | Precision | 2/2017 | SJS | 348 | 70 | 0.40 | 98.6 | |
| 2016 Commercial Samples (Q1) | Precision | 10/2016 | SJS | 418 | 82 | 0.25 | 98.8 | |
| 2016 Spring Survey (201602) | Precision | 9/2016 | SJS | 639 | 90 | 1.57 | 96.7 | |
| 2015 Commercial Samples (Q4) | Precision | 4/2016 | SJS | 514 | 96 | 0.98 | 97.9 | |
| 2015 Autumn Survey (201504) | Precision | 4/2016 | SJS | 305 | 80 | 0.00 | 100.0 | |
| 2015 Commercial Samples (Q1) | Precision | 1/2016 | SJS | 476 | 90 | 1.30 | 96.7 | |
| 2014 Commercial Samples (Q1-Q4) | Precision | 10/2015 | SJS | 515 | 100 | 0.00 | 100.0 | |
| 2015 Spring Survey (201502) | Precision | 10/2015 | SJS | 640 | 100 | 0.00 | 100.0 | |
| 2014 Autumn Survey (201404) | Precision | 4/2015 | SJS | 275 | 58 | 0.00 | 100.0 | |
| 2014 Spring Survey (201402) | Precision | 9/2014 | SJS | 367 | 80 | 0.51 | 97.5 | |
| 2013 Spring Survey (201302) | Precision | 7/2013 | SJS | 820 | 100 | 0.00 | 100.0 | |
| 2012 Commercial Samples (Q1-Q4) | Precision | 3/2013 | SJS | 332 | 49 | 1.30 | 95.9 | |
| 2011 Commercial Samples (Q1-Q4) | Precision | 8/2012 | SJS | 256 | 75 | 0.00 | 100.0 | |
| 2012 Spring Survey (201202) | Precision | 7/2012 | SJS | 586 | 78 | 0.20 | 98.7 | |
| 2011 Autumn Survey (201105) | Precision | 7/2012 | SJS | 184 | 75 | 0.90 | 97.3 | |
| 2011 Spring Survey (201102) | Precision | 10/2011 | SJS | 481 | 122 | 0.39 | 99.2 | |
| 2010 Commercial Samples (Q1-Q4) | Precision | 9/2011 | SJS | 456 | 128 | 0.38 | 98.4 | |
| 2010 Autumn Survey (201004) | Precision | 5/2011 | SJS | 195 | 60 | 0.00 | 100.0 | |
| 2010 Spring Survey (201001) | Precision | 11/2010 | SJS | 468 | 105 | 0.00 | 100.0 | |
| 2009 Spring Survey (200902) | Calibration | 10/2010 | SJS | — | 200 | 0.24 | 99.5 | |
| 2009 Commercial Samples (Q3 and Q4) | Precision | 2/2010 | SJS | 55 | 50 | 0.00 | 100.0 | |
| 2009 Commercial Samples (Q1 and Q2) | Precision | 2/2010 | SJS | 614 | 80 | 0.79 | 97.5 | |
| 2009 Autumn Survey (200904) | Precision | 2/2010 | SJS | 141 | 50 | 0.57 | 98.0 | |
| 2009 Spring Survey (200902) | Precision | 9/2009 | SJS | 425 | 100 | 0.00 | 100.0 | |
| 2008 Commercial Samples (Q1) | Precision | 9/2009 | SJS | 678 | 172 | 0.26 | 97.7 | |
| 2008 Canadian (DFO) Commercial Samples (Q2) | Exchange | Spring 2009 | NS vs. FG | — | 100 | 0.50 | 96.0 | |
| 2008 Commercial Samples (Q1) | Exchange | Spring 2009 | NS vs. FG | — | 99 | 1.06 | 91.9 | |
| 2002 Spring Survey (200202), 2002 Commercial Samples (Q4), and 2004 Commercial Samples (Q2) | Precision | 10/2005 | NS | 519 | 100 | 0.68 | 95.0 |
