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DFO Data on Repeat Spawning Grilse
Northwest Miramichi |
| The following data was collected by DFO at both their Millerton (Main SW) and Cassilis (NW) trap net facilities. The 2011 tables are compiled from data published by DFO in Report #3042, Table 18. (View Report) They show a detailed analysis of the actual spawning contribution of grilse (1 Sea Winter). Note that the maiden (first return) 2 SW and 3 SW salmon are primarily females, which is why Miramichi anglers have been actively releasing them, by law, since 1984. |
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| Northwest Miramichi River |
| 2011 Cassilis data - 390 'large' salmon of known sex, plus age and spawning history from scale analysis |
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Females |
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Males |
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1 Sea Winter Maidens |
0 |
0.0% |
7 |
19.4% |
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2 Sea Winter Maidens |
330 |
93.2% |
15 |
41.7% |
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3 Sea Winter Maidens |
0 |
0.0% |
0 |
0.0% |
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1 SW repeats from 2010 ( first time back - consecutive yr. spawners ) |
2 |
0.6% |
6 |
16.7% |
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1 SW repeats from 2009 and earlier (2nd time, or more, back - consecutive yr. spawners ) |
1 |
0.3% |
3 |
8.3% |
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1 SW repeats from 2009 and earlier ( first time back -alternate yr. spawners ) |
2 |
0.6% |
2 |
5.6% |
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1 SW repeats from 2007 ( 2nd time back - alternate yr. spawners ) |
1 |
0.3% |
0 |
0.0% |
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2 SW repeats from 2010 ( first time back - consecutive yr. spawners ) |
6 |
1.7% |
1 |
2.8% |
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2 SW repeats from 2009 and earlier ( 2nd time, or more, back - consecutive yr. spawners ) |
4 |
1.1% |
0 |
0.0% |
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2 SW repeats from 2009 ( first time back -alternate yr. spawners ) |
8 |
2.3% |
2 |
5.6% |
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2 SW repeats from 2007 ( 2nd time back - alternate yr. spawners ) |
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0.0% |
0 |
0.0% |
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354 |
100.0% |
36 |
100.0% |
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Repeat spawning female grilse numbered 6 fish |
1.69% |
56 out of 354 is 1.69% ( 2% for a round figure ) |
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| Northwest Miramichi River |
| 2012 Cassilis data - 207 'large' salmon of known sex, plus age and spawning history from scale analysis |
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Females |
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Males |
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1 Sea Winter Maidens |
0 |
0.0% |
0 |
0.0% |
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2 Sea Winter Maidens |
146 |
74.9% |
3 |
25.0% |
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3 Sea Winter Maidens |
1 |
0.5% |
0 |
0.0% |
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1 SW repeats from 2011 ( first time back - consecutive yr. spawners ) |
2 |
1.0% |
5 |
41.7% |
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1 SW repeats from 2010 and earlier ( 2nd time, or more, back - consecutive yr. spawners )" |
0 |
0.0% |
0 |
0.0% |
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1 SW repeats from 2010 and earlier ( first time back -alternate yr. spawners ) |
4 |
2.1% |
4 |
33.3% |
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1 SW repeats from 2008 ( 2nd time back - alternate yr. spawners ) |
0 |
0.0% |
0 |
0.0% |
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2 SW repeats from 2011 ( first time back - consecutive yr. spawners ) |
34 |
17.4% |
0 |
0.0% |
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2 SW repeats from 2010 and earlier ( 2nd time, or more, back - consecutive yr. spawners ) |
1 |
0.5% |
0 |
0.0% |
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2 SW repeats from 2010 ( first time back -alternate yr. spawners ) |
3 |
1.5% |
0 |
0.0% |
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2 SW repeats from 2008 ( 2nd time back - alternate yr. spawners ) |
4 |
2.1% |
0 |
0.0% |
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195 |
55.1% |
12 |
33.3% |
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Repeat spawning female grilse numbered 6 fish |
3.08% |
6 out of 195 is 3.08% ( 3% for a round figure ) |
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Repeat Spawning Grilse Numbers for the Main Southwest Miramichi |
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