Results of pollock age-reader precision test
against randomly selected samples from all quarters of the 2013 NEFSC commercial samples.
plot, showing both of the reader's ages. A small amount of noise was added to the data to improve visibility of overlapping data points. (B) Age-frequency table, showing the first set of ages across the top and the second set of ages on the left. Numbers in the shaded boxes indicate agreement between the two
ages. Numbers above this diagonal indicate fish which were over-aged the second time; those below the shaded boxes were under-aged. Total age
frequencies are given by age for both ages. (C) Results summary, indicating results of the test
in relation to the first set of ages.
2013 Commercial Samples (Q1-4)
*JP = trainee; each fish was aged twice as part of training.