Table 4 Capture rates (captures per minute) and capture efficiencies (captures per attempt) of great egrets in 2009 and 2010 in Water Conservation Area 3A of the Everglades, USA.
From: Foraging Wading Bird (Ciconiiformes) Attraction to Prescribed Burns in an Oligotrophic Wetland
Variable | Â | 2009 | Â | 2010 |
|---|---|---|---|---|
Burn | Slough Adj. Burna | Burn | Slough Adj. Burna | |
Number of observations | 17 | 43 | 14 | 24 |
Mean capture rate (±SD) | 0.30 (0.3) | 0.71 (0.9) | 0.07 (0.1) | 0.24 (0.2) |
Range of capture rate | 0 to 0.9 | 0 to 3.2 | 0 to 0.4 | 0 to 0.8 |
Mean capture efficiency (±SD)b | 0.46 (0.4) | 0.38 (0.3) | 0.18 (0.3) | 0.45 (0.4) |
Mean attempts per minute (±SD) | 0.6 (0.5) | 1.3 (1.2) | 0.3 (0.3) | 0.5 (0.4) |
Water depth (cm) (±SD) | 12.1 (8.9) | 16.5 (4.6) | 13.9 (4.9) | 22.7 (4.4) |
Range of water depth (cm) | 0 to 21 | 8 to 25 | 7 to 21 | 14 to 30 |
Mean days since burn (±SD) | 9.9 (7.8) | 18.3 (11.4) | 12.1 (13.4) | 21.3 (7.5) |
Range of days since burn | 2 to 28 | 2 to 36 | 1 to 27 | 12 to 28 |
Mean flock size (±SD) | 19 (17) | 44 (33) | 21 (17) | 8 (14) |
Range of flock size | 3 to 60 | 1 to 111 | 1 to 46 | 1 to 48 |