Butterfish, Peprilus triacanthus
Image
Josh Dayton (JD) has been working with Butterfish since 2012. 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.
| Sample Source | Test Type | Date Completed | Age Reader | Number Aged | Number Tested | CV (%) | Agree-ment (%) | Bias |
|---|---|---|---|---|---|---|---|---|
| 2024 Commercial Samples (Q3) | Precision | 3/2025 | JD | 518 | 40 | 3.10 | 90.0 | |
| 2024 Autumn Survey (202404) | Precision | 3/2025 | JD | 844 | 43 | 4.97 | 86.0 | n/s |
| 2024 Commercial Samples (Q2) | Precision | 9/2024 | JD | 421 | 40 | 4.04 | 85.0 | n/s |
| 2024 Commercial Samples (Q1) | Precision | 8/2024 | JD | 300 | 40 | 2.93 | 87.5 | n/s |
| 2024 Spring Survey (202402) | Precision | 7/2024 | JD | 573 | 54 | 2.29 | 92.6 | |
| 2023 Commercial Samples (Q4) | Precision | 2/2024 | JD | 325 | 45 | 3.20 | 88.9 | n/s |
| 2023 Commercial Samples (Q3) | Precision | 1/2024 | JD | 372 | 59 | 3.25 | 88.1 | n/s |
| 2023 Commercial Samples (Q2) | Precision | 1/2024 | JD | 371 | 45 | 2.51 | 91.1 | |
| 2023 Autumn Survey (202304) | Precision | 1/2024 | JD | 876 | 74 | 3.97 | 89.2 | n/s |
| 2023 Commercial Samples (Q1) | Precision | 1/2024 | JD | 196 | 40 | 2.42 | 90.0 | |
| 2023 Spring Survey (202302) | Precision | 10/2023 | JD | 158 | 40 | 1.57 | 95.0 | |
| 2022 Commercial Samples (Q3-4) | Precision | 8/2023 | JD | 323 | 67 | 4.80 | 86.6 | n/s |
| 2022 Commercial Samples (Q1-2) | Precision | 8/2023 | JD | 185 | 40 | 2.57 | 92.5 | |
| 2022 Autumn Survey (202204) | Precision | 8/2023 | JD | 975 | 57 | 2.44 | 93.0 | |
| 2022 Spring Survey (202202) | Precision | 8/2022 | JD | 832 | 61 | 2.80 | 90.2 | |
| 2020 Commercial Samples (Q1-Q4) | Precision | 5/2022 | JD | 299 | 45 | 4.95 | 86.7 | n/s |
| 2021 Commercial Samples (Q1-Q4) | Precision | 4/2022 | JD | 370 | 70 | 4.66 | 85.7 | n/s |
| 2021 Autumn Survey (202104) | Precision | 4/2022 | JD | 873 | 50 | 15.33 | 74.0 | n/s |
| 2021 Spring Survey (202102) | Precision | 2/2022 | JD | 611 | 45 | 2.50 | 88.9 | n/s |
| 2020 Spring Survey (202002) | Precision | 2/2022 | JD | 282 | 40 | 6.63 | 77.5 | 0.020 |
| 2019 Commercial Samples (Q1-Q4) | Precision | 9/2020 | JD | 321 | 65 | 6.95 | 84.6 | n/s |
| 2019 Autumn Survey (201904) | Precision | 2/2020 | JD | 702 | 58 | 4.88 | 86.2 | n/s |
| 2019 Spring Survey (201902) | Precision | 9/2019 | JD | 495 | 82 | 3.42 | 87.8 | n/s |
| 2018 Commercial Samples (Q1-Q4) | Precision | 7/2019 | JD | 579 | 82 | 10.17 | 79.3 | n/s |
| 2018 Autumn Survey (201804) | Precision | 4/2019 | JD | 704 | 64 | 6.50 | 82.8 | n/s |
| 2018 Spring Survey (201802) | Precision | 8/2018 | JD | 612 | 63 | 2.86 | 90.5 | |
| 2017 Commercial Samples (Q1-Q4) | Precision | 5/2018 | JD | 152 | 36 | 4.66 | 86.1 | n/s |
| 2016 Commercial Samples (Q1-Q4) | Precision | 1/2018 | JD | 271 | 57 | 6.29 | 82.5 | n/s |
| 2017 Spring Survey (201702) | Precision | 12/2017 | JD | 632 | 65 | 1.98 | 90.8 | |
| 2016 Autumn Survey (201604) | Precision | 3/2017 | JD | 794 | 65 | 1.16 | 96.9 | |
| 2016 Spring Survey (201602) | Precision | 1/2017 | JD | 905 | 80 | 3.70 | 87.5 | n/s |
| 2015 Commercial Samples (Q1-Q4) | Precision | 3/2016 | JD | 226 | 48 | 4.55 | 87.5 | n/s |
| 2015 Autumn Survey (201504) | Precision | 2/2016 | JD | 814 | 76 | 2.85 | 93.4 | |
| 2015 Spring Survey (201502) | Precision | 2/2016 | JD | 580 | 72 | 1.43 | 95.8 | |
| 2014 Commercial Samples (Q1-Q4) | Precision | 1/2016 | JD | 450 | 80 | 3.39 | 90.0 | |
| 2014 Autumn Survey (201404) | Precision | 4/2015 | JD | 945 | 100 | 5.29 | 91.0 | |
| 2014 Spring Survey (201402) | Precision | 4/2015 | JD | 404 | 81 | 2.30 | 93.8 | |
| 2013 Autumn Survey (201304) | Precision | 2/2015 | JD | 836 | 86 | 5.07 | 90.7 | |
| 2013 Spring Survey (201302) | Precision | 11/2013 | JD | 571 | 92 | 1.44 | 93.5 | |
| 2009, 2010, 2011, 2012 Autumn Surveys (200904, 201004, 201105, 201204) | Precision | 5/2013 | JD | 3709 | 101 | 5.86 | 90.1 | |
| 2010, 2011, 2012 Spring Surveys (201001, 201102, 201202) | Precision | 4/2013 | JD | 1953 | 98 | 5.36 | 80.6 | n/s |
| 2009 Spring Survey (200902) | Precision | 9/2009 | LDW | 385 | 75 | 3.80 | 85.3 | n/s |
| 2003 Autumn Survey (200306) | Precision | 6/2009 | LDW | 837 | 75 | 4.08 | 85.3 | 0.040 |
| 2004 Autumn Survey (200407) | Precision | 5/2009 | LDW | 715 | 72 | 13.51 | 80.6 | n/s |
| 2005 Autumn Survey (200510) | Precision | 4/2009 | LDW | 760 | 73 | 14.01 | 72.6 | 0.035 |
| 2006 Autumn Survey (200610) | Precision | 4/2009 | LDW | 1052 | 100 | 3.49 | 93.0 | |
| 2007 Autumn Survey (200709) | Precision | 4/2009 | LDW | 750 | 74 | 8.47 | 83.8 | n/s |
| 2003 Spring Survey (200303) | Precision | 4/2009 | LDW vs. NM | 218 | 156 | 5.60 | 84.0 | n/s |
| 2005 Spring Survey (200503) | Precision | 4/2009 | LDW | 203 | 49 | 5.48 | 77.6 | 0.012 |
| 2006 Spring Survey (200604) | Precision | 4/2009 | LDW | 286 | 49 | 4.00 | 85.7 | n/s |
| 2008 Autumn Survey (200807) | Precision | 3/2009 | LDW | 888 | 73 | 11.94 | 75.3 | n/s |
| 2008 Spring Survey (200803) | Precision | 3/2009 | LDW | 355 | 75 | 2.17 | 93.3 | |
| 2007 Spring Survey (200703) | Precision | 3/2009 | LDW | 338 | 49 | 7.04 | 75.5 | n/s |
| 1984 Spring Survey (198402), 1984 Autumn Survey (198405), and 1984 Commercial Samples (all quarters) | Calibration | 1/2009 | LDW | — | 769 | 2.74 | 93.4 |
