Results of the 2009 Atlantic mackerel DFO/NEFSC aging exchange using randomly selected samples from the second quarter of the 2008 DFO commercial samples.
(A) Age-bias plot, showing the average age attained by the DFO age reader
versus the ages attained by the NEFSC age reader. Error bars indicate
95% confidence intervals. (B) Age-frequency table, showing each reader's ages. Numbers in the shaded boxes indicate agreement between the two ages. Numbers above this diagonal indicate fish which were given higher ages by the DFO age reader; those below the shaded boxes were given higher ages by the NEFSC age reader. Total age frequencies are given by age for both readers. (C) Results summary, indicating results for the NEFSC reader relative to each age for the DFO reader.
| Species: |
Atlantic Mackerel
| Test Type: |
2009 DFO/NEFSC Aging Exchange
| | Sample Source: |
2008 DFO Commercial Samples (Q2)
| Age Reader*: |
NS vs. FG
| | Date Completed: |
Spring 2009
| Sample Size: |
100
| | CV: |
0.50%
| Agreement: |
96.0%
| | Bowker's test: |
Not applicable
| | *The NEFSC age reader is listed first; this does not imply that reader's ages are expected to be more reliable.
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