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Acadian Redfish: QA/QC Exercise Results

Results of the QA/QC exercises for ageing Acadian Redfish.

Acadian Redfish, Sebastes fasciatus

Image
Left-facing side-view illustration of Acadian redfish, big black eye and spiky fins. NOAA Fisheries text along tail fin. Credit: NOAA Fisheries/Jack Hornady

Christine Kircun (CK) has been working with Acadian Redfish since 2012. Sectioned otoliths are viewed with transmitted light, except for small fish (<20 cm) which are cut in half 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 (%) Agreement (%) Bias
2021 Autumn Survey (202104) Precision 10/2022 CK 843 100 1.69 82.0 n/s
2005 Commercial Samples (Q1-4) Precision 2/2022 CK 374 70 3.23 55.7 n/s
2003 Commercial Samples (Q1-4) Precision 11/2021 CK 270 60 3.42 58.3 n/s
2017 Spring Survey (201702) Precision 8/2021 CK 472 83 1.72 80.7 n/s
2016 Commercial Samples (Q1-4) Precision 1/2021 CK 553 99 2.74 61.6 n/s
2019 Spring Survey (201902) Precision 6/2020 CK 336 80 1.35 80.0 n/s
2019 Autumn Survey (201904) Precision 4/2020 CK 768 77 1.92 74.0 n/s
2018 Spring Survey (201802) Precision 10/2019 CK 242 43 1.48 79.1 n/s
2018 Autumn Survey (201804) Precision 6/2019 CK 570 101 1.41 80.2 n/s
2017 Commercial Samples (Q1-4) Precision 12/2018 CK 514 98 3.26 49.0 n/s
2017 Autumn Survey (201704) Precision 6/2018 CK 321 67 1.81 71.6 n/s
2016 Autumn Survey (201604) Precision 1/2018 CK 925 100 2.70 70.0 n/s
2015 Autumn Survey (201504) Precision 10/2017 CK 984 99 1.40 80.8 n/s
2014 Autumn Survey (201404) Precision 3/2016 CK 897 97 2.24 71.1 n/s
2013 Autumn Survey (201304) Precision 2/2015 CK 946 98 2.14 74.5 n/s
2012 Autumn Survey (201204) Precision 8/2014 CK 1175 101 2.99 62.4 n/s
2011 Autumn Survey (201105) Precision 4/2014 CK* 827 97 2.36 71.1 n/s
2010 Autumn Survey (201004) Precision 2/2013 CL 862 100 3.16 75.0 n/s
2009 Autumn Survey (200904) Precision 7/2012 CL 1023 120 3.33 74.2 n/s
2008 Autumn Survey (200807) Precision 3/2012 CL 982 98 2.58 73.5 n/s
2007 Autumn Survey (200709) Precision 7/2008 JB 741 113 0.67 89.4 n/s
2006 Autumn Survey (200610) Precision 2/2007 JB 853 108 1.17 84.3 n/s
2005 Autumn Survey (200510) Precision 1/2007 JB 794 106 1.23 84.9 n/s
2004 Autumn Survey (200407) Calibration 1/2007 JB 140 1.15 86.4 n/s
2004 Autumn Survey (200407) Precision 3/2005 JB 867 142 0.99 89.4 n/s

 

*CL married to become CK in late 2013.

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