Table 1. Ranking of six general linear models relating temporal trends in nest success of dabbling ducks as a function of latitude, longitude of study site, country (Canada vs. United States), and year of study between 1935 and 2006. n = sample size; K = number of parameters; AICc = Akaike’s Information Criterion, corrected for small sample sizes; ΔAICc = the difference in AICc between each model and the model with the minimum AICc; w = Akaike weight; and r² = the proportion of the total variation in nest success explained by each model (Xu 2003).
| |
| |
|
Model |
Fixed effects |
-2*LL |
n |
K |
AICc |
ΔAICc |
w |
r² |
| |
|
1 |
Latitude Longitude |
248.6 |
507 |
4 |
-489.0 |
26.8 |
0.00000 |
0.06 |
|
2 |
Latitude Longitude Country |
253.0 |
507 |
5 |
-496.0 |
19.9 |
0.00003 |
0.08 |
|
3 |
Latitude Longitude Country Year |
255.6 |
507 |
6 |
-499.0 |
16.9 |
0.0001 |
0.09 |
|
4 |
Latitude Longitude Country Year Country*Year |
263.0 |
507 |
7 |
-511.7 |
4.2 |
0.07 |
0.11 |
|
5 |
Latitude Longitude Country Year Year² |
264.7 |
507 |
7 |
-515.2 |
0.6 |
0.39 |
0.12 |
|
6 |
Latitude Longitude Country Year Year² Country*Year Country*Year² |
267.1 |
507 |
9 |
-515.8 |
0.0 |
0.54 |
0.13 |
|
| |
|