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Table 1 Summary statistics for selected attributes of ARN coupes harvested since 2003

From: Variable retention in Tasmania, Australia: trends over 16 years of monitoring and adaptive management

Attribute Mean sd Number Min Max
Coupe area (ha) 38.6 25.3 89 4.7 139.2
Harvest area (ha) 24.3 13.8 115 3.6 74.4
Perimeter length (m) 4728 2313 115 773 11,662
Perimeter-to-area ratio (m ha−1) 210 71 115 117 543
Influence (%) 68 14 115 34 97
Retention (%) 29 20 89 0 75
Burnt seedbed (%) 64 24 82 0 100
Disturbed seedbed (%) 26 20 82 0 93
Unburnt/undisturbed seedbed (%) 10 15 82 0 1
Age 1 stocking (%) 70 17 80 26 100
Age 1 density (%) 2507 1724 78 348 9500
  1. Number varies due to incomplete survey records or unfinished post-harvest mapping updates for some coupes. Also given are the mean, standard deviation (sd), and minimum (min) and maximum (max) value