Results of summer flounder inter-reader precision test against randomly selected samples from the 2016 NEFSC spring survey. Otoliths were used for age determinations. (A) Agreement plot, showing the ages attained by each reader. A small amount of noise was added to the data to improve visibility of overlapping data points. (B) Age-frequency table, showing each reader's ages. Numbers in the shaded boxes indicate agreement between the two readers. Numbers above this diagonal indicate fish which were given higher ages by BJ; those below the shaded boxes were given higher ages by ER. Total age frequencies are given by age for both readers. (C) Results summary, indicating ER's results relative to each of BJ's ages.

Species: Summer Flounder Test Type: Inter-reader Precision
Sample Source: 2016 Commercial Samples (Q1) Structure: Otoliths
Age Reader: ER* vs. BJDate Completed: November 2016
Number Aged: 379 Number Tested: 68
CV: 4.61% Agreement: 76.5%
Bowker's test: Not significant
  *ER will become the summer flounder age reader after BJ's retirement.


A. Agreement Plot

Summer Flounder Agreement Plot

B. Age-Frequency Table

Test Production Age
Age 0 1 2 3 4 5 6 7 8 9 10 Total
Total 4 11 13 10 10 8 6 4 1 1 68
0
1 4 2 6
2 9 1 10
3 11 2 13
4 1 8 2 11
5 6 6
6 2 5 1 1 9
7 3 5 1 9
8 2 2
9 1 1
10 1 1


C. Results Summary

Production Age N N Agreed Percent Agreed Average Test Age
1 4 4 100 % 1.00
2 11 9 82 % 1.82
3 13 11 85 % 3.00
4 10 8 80 % 3.80
5 10 6 60 % 5.00
6 8 5 62 % 6.38
7 6 5 83 % 6.83
8 4 2 50 % 7.25
9 1 1 100 % 9.00
10 1 1 100 % 10.00


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