Windowpane Flounder, Scophthalmus aquosus
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Sandy Sutherland (SJS) has been working with Windowpane Flounder since 2015. Whole otoliths viewed with reflected light, except for large fish (>30cm) which are cut in half and viewed with reflected light. Only samples from Georges Bank (GB) are currently aged.
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 | Stock | Test Type | Date Completed | Age Reader | Number Aged | Number Tested | CV (%) | Agree-ment (%) | Bias |
|---|---|---|---|---|---|---|---|---|---|
| 2022 Spring & Autumn Surveys (202202 & 202204) | GB | Precision | 6/2023 | SJS | 178 | 44 | 6.87 | 70.5 | n/s |
| 2019 & 2021 Spring Surveys (201902 & 202102) | GB | Precision | 5/2022 | SJS | 280 | 50 | 12.43 | 70.0 | 0.017 |
| 2016 Autumn Survey (201604) | GB | Precision | 7/2020 | SJS | 217 | 39 | 8.98 | 71.8 | n/s |
| 2014 & 2015 Autumn Surveys (201404 & 201504) | GB | Precision | 9/2016 | SJS | 368 | 61 | 4.72 | 77.0 | n/s |
| 2004 & 2005 Autumn Surveys (200407 & 200510) | GB | Precision | 11/2015 | SJS | 189 | 45 | 2.93 | 82.2 | n/s |
