|Results of summer flounder age-reader precision test
against randomly selected samples from the 2012 Massachusetts state spring survey.
Scales were used for age determinations for fish under 60 cm; otoliths were aged for larger fish. (A) Agreement
plot, showing both the production and test ages. A small amount of noise was added to the data to improve visibility of overlapping data points. (B) Age-frequency table, showing the test ages
across the top and the production ages on the
left. Numbers in the shaded boxes indicate agreement between the two
ages. Numbers above this diagonal indicate fish which were under-aged during the test; those below the shaded boxes were over-aged. Total age
frequencies are given by age for both the test and
production ages. (C) Results summary, indicating results of the test
for each production age.
2012 Massachusetts Spring Survey (201291)
||Scales and Otoliths|