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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