Table 2. Importance values, model-averaged parameter estimates, and associated unconditional standard errors (SE) and 95% confidence intervals (CI) for parameters predicting hatching success, chick survival, and overall reproductive success in Fork-tailed Storm-Petrel (Oceanodroma furcata) nests at Kasatochi Island, Alaska. Parameters are listed in order of importance for each success variable in each year based on importance values; only those appearing in competing models (ΔAICc < 2.0) are shown. Brooding duration data are available only for 2006.


Success Year Parameter Importance Estimate SE 95% CI
Hatching success
2005 DEP
TEMPR
SLP
RH
VEGH
EGGV
VEGC
Intercept
0.55
0.52
0.51
0.48
0.45
0.30
0.23
0.509
-0.200
-0.014
1.024
-1.084
-0.001
-0.004
8.602
1.321
0.288
0.014
1.458
1.161
0.050
0.010
10.122
2.589
0.565
0.028
2.858
2.276
0.100
0.020
19.839
2006 EGGV
VEGC
DEP
VEGH
Intercept
0.58
0.57
0.52
0.34
0.001
-0.047
-0.431
-0.399
15.312
0.026
0.062
1.743
0.819
7.864
0.050
0.122
3.416
1.605
15.413
Chick survival
2005 TEMP
EGGV
VIS
Intercept
1.00
0.26
0.16
5.513
0.002
0.017
12.833
0.918
0.003
0.027
8.423
1.799
0.004
0.053
16.510
2006 TEMP
BRD
VIS
Intercept
1.00
0.70
0.30
4.304
0.156
0.026
16.573
1.159
0.032
0.058
9.412
2.272
0.063
0.114
18.448
Overall reproductive success
2005 TEMP
VIS
EGGV
Intercept
1.00
0.56
0.46
3.395
0.015
0.001
7.630
0.577
0.023
0.030
8.547
1.131
0.045
0.059
16.751
2006 TEMP
BRD
VIS
Intercept
1.00
0.73
0.49
2.400
0.156
0.005
9.522
0.472
0.121
0.045
7.202
0.925
0.237
0.088
14.116

†BRD: brooding duration; DEP: chamber depth; EGGV: egg volume; RH: relative humidty; SLP: slope; TEMP: temperature; TEMPR: temperature range; VEGC: vegetation cover; VEGH: vegetation height; VIS: visitation rate