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Bluefish: QA/QC Exercise Results

Results of the QA/QC exercises for ageing bluefish

Bluefish, Pomatomus saltatrix

 

Image
Side-profile illustration of bluefish with shiny white and light blue body. Credit: NOAA Fisheries/Jack Hornady

Eric Robillard (ER) has been working with Bluefish since 2015; before that, the age reader was Nicole Calabrese (NC). Sectioned otoliths are viewed with transmitted 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
2022 Commercial Samples (Q1-Q2) Precision 11/2022 ER 218 45 1.61 91.1  
2021 Commercial Samples (Q1-4) Precision 5/2022 ER 456 87 2.86 86.2 n/s
2020 Commercial Samples (Q4) Precision 4/2021 ER 329 59 1.02 96.6  
2020 Commercial Samples (Q3) Precision 3/2021 ER 397 71 6.13 87.3 n/s
2020 Commercial Samples (Q1-2) Precision 12/2020 ER 304 60 2.44 83.3 n/s
2019 Commercial Samples (Q4) Precision 4/2020 ER 274 61 1.82 90.2  
2019 Commercial Samples (Q3) Precision 2/2020 ER 221 45 1.61 93.3  
2019 Commercial Samples (Q1-2) Precision 11/2019 ER 264 50 0.98 94.0  
2018 Commercial Samples (Q4) Precision 5/2019 ER 290 66 2.57 92.4  
2018 Commercial Samples (Q3) Precision 3/2019 ER 260 57 5.26 86.0 n/s
2015 Commercial Samples (Q1-4) Precision 3/2016 ER 560 100 2.69 86.0 n/s
2014 Autumn Survey (201404) Precision 7/2015 NC 117 40 14.14 80.0 n/s

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

Age and Growth