Table 2. Estimated minimum approaching distances (MAD) and buffer areas (BA) for the three study areas and seasons following two methods. Method 1 (Rodgers and Smith 1995, 1997) estimates MAD as (AFID+1.6495*SD)+AAD, where AFID is the mean FID, SD is the standard deviation of AFID, and AAD is the mean AD. Method 2 (Vos et al. 1985) estimates MAD as the maximum FID recorded +AAD, where AAD is the mean AD. Buffer areas for both methods are calculated as Π * MAD2.
(a) Method 1
| |
| |
|
Study area |
Season |
MAD (m) |
BA (ha) |
| |
|
Anaheim Bay |
Non-breeding |
59.06 |
1.09 |
|
Anaheim Bay |
Pre-nesting |
56.76 |
1.01 |
|
Bolsa Chica Wetlands |
Non-breeding |
47.36 |
0.70 |
|
Bolsa Chica Wetlands |
Pre-nesting |
47.15 |
0.70 |
|
Los Cerritos Wetlands |
Non-breeding |
44.36 |
0.62 |
|
Los Cerritos Wetlands |
Pre-nesting |
48.39 |
0.74 |
|
| |
(b) Method 2
| |
| |
|
Study area |
Season |
MAD (m) |
BA (ha) |
| |
|
Anaheim Bay |
Non-breeding |
60.85 |
1.16 |
|
Anaheim Bay |
Pre-nesting |
63.48 |
1.27 |
|
Bolsa Chica Wetlands |
Non-breeding |
49.74 |
0.78 |
|
Bolsa Chica Wetlands |
Pre-nesting |
51.61 |
0.84 |
|
Los Cerritos Wetlands |
Non-breeding |
48.72 |
0.75 |
|
Los Cerritos Wetlands |
Pre-nesting |
58.06 |
1.06 |
|
| |
|