Results of the 2009 haddock DFO/NEFSC ageing exchange
using randomly selected samples from the 2009 DFO spring survey.
(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: |
Haddock
| Test Type: |
2009 DFO/NEFSC Ageing Exchange
| | Sample Source: |
2009 DFO Spring Survey (NED2009841)
| Stock Area: |
Georges Bank
| | Age Reader*: |
SJS vs. LVE
| Date Completed: |
Spring 2009
| | Sample Size: |
54
| CV: |
0.52%
| | Agreement: |
98.1%
| Bowker's test: |
Not applicable
| | *The NEFSC age reader is listed first; this does not imply that either reader's ages are expected to be more reliable.
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A. Age-Bias Plot
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B. Age-Frequency Table
| Age | Age (SJS) | | | (LVE) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | Total | | Total | | 11 | 6 | 3 | 6 | | 19 | | | 7 | | 1 | | 1 | 54 | | 0 | |
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| 19 | | 7 |
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C. Results Summary
| Age (LVE) |
N |
N Agreed |
Percent Agreed |
Average Age (SJS) | | 1 | 11 | 11 | 100 % | 1.00 | | 2 | 7 | 6 | 86 % | 2.14 | | 3 | 2 | 2 | 100 % | 3.00 | | 4 | 6 | 6 | 100 % | 4.00 | | 5 | | | | | | 6 | 19 | 19 | 100 % | 6.00 | | 7 | | | | | | 8 | | | | | | 9 | 7 | 7 | 100 % | 9.00 | | 10 | | | | | | 11 | 1 | 1 | 100 % | 11.00 | | 12 | | | | | | 13 | 1 | 1 | 100 % | 13.00 |
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