Table 4 Factors that might influence the food amount delivered by males or females per feeding bout in the Grey-backed Shrike
From: The Grey-backed Shrike parents adopt brood survival strategy in both the egg and nestling phases
Parameters | Male | Female | ||||||
|---|---|---|---|---|---|---|---|---|
Fixed effects | β ± SE | t | n | P | β ± SE | t | n | P |
Intercept | 0.74 ± 0.83 | 0.89 | 1470 | 0.37 | 1.00 ± 0.76 | 1.31 | 1817 | 0.19 |
Brood size | 0.36 ± 0.06 | 6.03 | 1470 |  < 0.001 | 0.21 ± 0.06 | 3.50 | 1817 |  < 0.001 |
Nestling age | 0.01 ± 0.01 | 0.75 | 1470 | 0.46 | 0.27 ± 0.01 | 2.76 | 1817 | 0.006 |
Provisioning rate | – 0.02 ± 0.01 | – 4.08 | 1470 |  < 0.001 | – 0.02 ± 0.03 | – 9.14 | 1817 |  < 0.001 |
Random effects | β ± SD | Results of VCA (%) | β ± SD | Results of VCA (%) |
|---|---|---|---|---|
Year | 0.02 ± 0.14 | 2.17 | 0.04 ± 0.19 | 5.01 |
Nest identity | 0.14 ± 0.37 | 14.30 | 0.03 ± 0.17 | 4.06 |
Residual | 0.80 ± 0.89 | 83.53 | 0.68 ± 0.82 | 90.93 |