Silver Hake, Merluccius bilinearis
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Christine Kircun (CK) has been working with Silver Hake since 2011. Sectioned 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.
| Sample Source | Test Type | Date Completed | Age Reader | Number Aged | Number Tested | CV (%) | Agree-ment (%) | Bias |
|---|---|---|---|---|---|---|---|---|
| 2019 Observer Samples (Q1-Q4) | Precision | 1/2024 | CK | 427 | 62 | 1.29 | 95.5 | |
| 2023 Commercial Samples (Q3) | Precision | 12/2023 | CK | 324 | 50 | 1.21 | 94.0 | |
| 2023 Commercial Samples (Q2) | Precision | 11/2023 | CK | 514 | 67 | 0.60 | 97.0 | |
| 2023 Spring Survey (202302) | Precision | 7/2023 | CK | 382 | 70 | 2.85 | 90.0 | |
| 2023 Commercial Samples (Q1) | Precision | 6/2023 | CK | 160 | 41 | 0.77 | 95.1 | |
| 2022 Autumn Survey (202204) | Precision | 6/2023 | CK | 612 | 100 | 1.64 | 94.0 | |
| 2022 Commercial Samples (Q4) | Precision | 5/2023 | CK | 504 | 64 | 4.00 | 90.6 | |
| 2022 Commercial Samples (Q3) | Precision | 4/2023 | CK | 574 | 74 | 0.27 | 98.6 | |
| 2022 Commercial Samples (Q2) | Precision | 1/2023 | CK | 478 | 86 | 0.77 | 95.3 | |
| 2022 Spring Survey (202202) | Precision | 12/2022 | CK | 1265 | 100 | 0.97 | 96.0 | |
| 2022 Commercial Samples (Q1) | Precision | 10/2022 | CK | 305 | 40 | 0.00 | 100.0 | |
| 2021 Autumn Survey (202104) | Precision | 7/2022 | CK | 561 | 55 | 6.48 | 85.5 | n/s |
| 2021 Commercial Samples (Q4) | Precision | 6/2022 | CK | 580 | 60 | 0.73 | 96.7 | |
| 2021 Commercial Samples (Q3) | Precision | 6/2022 | CK | 264 | 40 | 4.66 | 85.0 | n/s |
| 2021 Commercial Samples (Q2) | Precision | 6/2022 | CK | 303 | 40 | 2.12 | 92.5 | |
| 2021 Spring Survey (202102) | Precision | 12/2021 | CK | 1250 | 100 | 2.89 | 90.0 | |
| 2021 Commercial Samples (Q1) | Precision | 11/2021 | CK | 692 | 62 | 0.00 | 100.0 | |
| 2020 Spring Survey (202002) | Precision | 5/2021 | CK | 242 | 50 | 0.00 | 100.0 | |
| 2020 Commercial Samples (Q4) | Precision | 5/2021 | CK | 954 | 100 | 0.28 | 99.0 | |
| 2020 Commercial Samples (Q3) | Precision | 1/2021 | CK | 621 | 70 | 1.57 | 95.7 | |
| 2020 Commercial Samples (Q2) | Precision | 12/2020 | CK | 599 | 55 | 0.00 | 100.0 | |
| 2020 Commercial Samples (Q1) | Precision | 9/2020 | CK | 460 | 58 | 0.00 | 100.0 | |
| 2019 Commercial Samples (Q4) | Precision | 4/2020 | CK | 542 | 43 | 2.85 | 93.0 | |
| 2019 Autumn Survey (201904) | Precision | 3/2020 | CK | 1126 | 100 | 2.45 | 96.0 | |
| 2019 Commercial Samples (Q3) | Precision | 2/2020 | CK | 548 | 100 | 2.72 | 90.0 | |
| 2019 Commercial Samples (Q2) | Precision | 12/2019 | CK | 498 | 76 | 1.17 | 94.7 | |
| 2019 Spring Survey (201902) | Precision | 11/2019 | CK | 1305 | 100 | 2.21 | 93.0 | |
| 2019 Commercial Samples (Q1) | Precision | 10/2019 | CK | 912 | 70 | 0.00 | 100.0 | |
| 2018 Commercial Samples (Q4) | Precision | 8/2019 | CK | 713 | 82 | 4.63 | 85.4 | n/s |
| 2018 Commercial Samples (Q3) | Precision | 7/2019 | CK | 862 | 100 | 2.49 | 88.0 | n/s |
| 2018 Autumn Survey (201804) | Precision | 2/2019 | CK | 514 | 69 | 1.09 | 97.1 | |
| 2018 Commercial Samples (Q2) | Precision | 2/2019 | CK | 774 | 98 | 1.12 | 94.9 | |
| 2018 Commercial Samples (Q1) | Precision | 8/2018 | CK | 695 | 74 | 0.00 | 100.0 | |
| 2018 Spring Survey (201802) | Precision | 7/2018 | CK | 841 | 94 | 1.00 | 97.9 | |
| 2017 Autumn Survey (201704) | Precision | 5/2018 | CK | 394 | 78 | 0.42 | 97.4 | |
| 2017 Commercial Samples (Q4) | Precision | 5/2018 | CK | 471 | 88 | 0.41 | 97.7 | |
| 2017 Commercial Samples (Q3) | Precision | 4/2018 | CK | 700 | 93 | 1.64 | 93.5 | |
| 2017 Spring Survey (201702) | Precision | 3/2018 | CK | 1341 | 88 | 1.21 | 95.5 | |
| 2017 Commercial Samples (Q2) | Precision | 2/2018 | CK | 549 | 89 | 2.30 | 89.9 | n/s |
| 2017 Commercial Samples (Q1) | Precision | 1/2018 | CK | 839 | 89 | 1.57 | 94.4 | |
| 2016 Autumn Survey (201604) | Precision | 12/2017 | CK | 838 | 89 | 2.06 | 93.3 | |
| 2016 Commercial Samples (Q4) | Precision | 12/2017 | CK | 560 | 68 | 1.82 | 94.1 | |
| 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.
