Results of butterfish inter-reader precision test
using randomly selected samples from the 2003 NEFSC spring survey. (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 NM; those
below the shaded boxes were given higher ages by LD-W. Total age
frequencies are given by age for both readers. (C) Results summary, indicating LD-W's results
relative to each of NM's ages.
2003 Spring Survey (200303)
LD-W vs. NM
*This test was between two experienced butterfish age readers.