Atlantic Mackerel, Scomber scombrus
Image
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 Autumn Survey (202304) | Precision | 3/2024 | SJS | 432 | 61 | 0.93 | 96.7 | |
| 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 |
