Table 39. Linear regression values between broods per year and percent of wet basins during 1-15 May duck counts, Woodworth Study Area, 1965-81. |
Species | r-valuesa |
Dabbling ducks | |
Mallard | 0.0363 |
Gadwall | 0.1197 |
Northern pintail | 0.5066 |
Green-winged teal | 0.4720 |
Blue-winged teal | 0.7035 |
Northern shoveler | 0.6823 |
American wigeon | -0.0374 |
Total dabbling ducks | 0.6226 |
Diving ducks | |
Redhead | 0.0631 |
Canvasback | -0.0548 |
Lesser scaup | -0.1654 |
Ruddy duck | 0.5048 |
Ring-necked duck | 0.2851 |
Total diving ducks | 0.2814 |
Total broods | 0.6417 |
ar-values > 0.48 were significant, 16df. |