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Table 1 Haematological and eggshell colour differences between treatment groups, pre- and post-treatment

From: Haematocrit, eggshell colouration and sexual signaling in the European starling (Sturnus vulgaris)

Trait

N

F

Df

P

PHZ

Control

Additional terms in model

Pre-treatment Hct (%)

29

1.09

1,27

0.31

50.8 ± 1.1

49.2 ± 1.0

 

Pre-treatment Hb (g/dl)

26

0.52

1,24

0.48

14.5 ± 0.6

13.9 ± 0.5

Pre-treatment mean BGC

29

1.70

1,27

0.20

0.473 ± 0.003

0.478 ± 0.002

Post-treatment Hct (%)

29

0.03

1,26

0.86

51.2 ± 1.1

51.5 ± 1.0

Pre-treatment Hct, F1,26 = 3.43, P = 0.08

Post-treatment Hb (g/dl)

26

6.89

1,23

0.015

17.3 ± 0.5

15.6 ± 0.4

Pre-treatment Hb, F1,23 = 7.17, P = 0.013

Post-treatment mean BGC

28

0.96

1,25

0.34

0.470 ± 0.002

0.468 ± 0.002

Pre-treatment BGC, F1,25 = 14.47, P = 0.0008

BGC of first egg of replacement clutch

20

0.01

1,17

0.92

0.467 ± 0.002

0.467 ± 0.002

Pre-treatment BGC, F1,17 = 17.44, P = 0.0006

  1. Means are least-squares means ± standard errors from general linear models.For post-treatment traits, including laying interval in the model yielded similar results (Additional file 2: Table S2)