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Red Hake: QA/QC Exercise Results

Results of the QA/QC exercises for ageing red hake.

Red Hake, Urophycis chuss

Jillian Price (JP) has been working with Red Hake since 2015; before that, the age reader was Grace Thornton (GT). 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
2021 Spring Survey (202102) Precision 8/2022 JP 863 100 2.06 89.0 0.03
2021 Autumn Survey (202104) Precision 6/2022 JP 730 100 0.83 95.0  
2019 Autumn Survey (201904) Precision 10/2020 JP 661 100 0.49 96.0  
2019 Spring Survey (201902) Precision 11/2019 JP 857 100 2.33 89.0 n/s
2018 Autumn Survey (201804) Precision 6/2019 JP 541 91 1.28 92.3  
2018 Spring Survey (201802) Precision 10/2018 JP 495 94 3.13 84.0 0.020
2017 Autumn Survey (201704) Precision 8/2018 JP 227 54 6.14 81.5 n/s
2017 Spring Survey (201702) Precision 1/2018 JP 947 91 2.74 84.6 n/s
2016 Autumn Survey (201604) Precision 12/2017 JP 748 94 1.46 91.5  
2016 Spring Survey (201602) Precision 10/2017 JP 986 87 2.17 89.7 n/s
2015 Autumn Survey (201504) Precision 9/2016 JP 1063 96 4.34 85.4 n/s
2015 Spring Survey (201502) Precision 3/2016 JP 1133 99 4.15 77.8 0.038
2014 Spring Survey (201402) Precision 6/2015 JP 427 79 2.91 83.5 n/s
2014 Autumn Survey (201404) Precision 3/2015 JP 543 94 10.45 77.7 n/s
2013 Autumn Survey (201304) Precision 6/2014 GT 797 93 9.61 65.6 n/s
2013 Spring Survey (201302) Precision 6/2014 GT 857 97 8.57 66.0 n/s

Last updated by Northeast Fisheries Science Center on December 27, 2022

Age and Growth