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Table 1 Carry-over effects on body mass, immune parameters and reproductive measures in the year following the experiment

From: Offspring pay sooner, parents pay later: experimental manipulation of body mass reveals trade-offs between immune function, reproduction and survival

Parameter

Control mean ± se

Experimental mean ± se

N (Control/ Experimental)

F/Chisq

P

Body mass (g)

32.5 ± 1.3

34.6 ± 1.1

11(5/6)

2.54

0.15

Lysis (titer)

0.45 ± 0.23

1.54 ± 0.43

11(5/6)

4.43

0.06

Agglutination (titer)

3.8 ± 0.2

4.5 ± 0.4

11(5/6)

1.77

0.22

Haptoglobin (mg/ml)

0.33 ± 0.04

0.39 ± 0.03

11(5/6)

0.65

0.44

H/L ratio

0.27 ± 0.06

0.61 ± 0.23

11(5/6)

0.98

0.36

Heterophils

17.2 ± 2.4

24.6 ± 5.7

11(5/6)

2.27

0.17

Lymphocytes

67 ± 5.6

50 ± 6.5

11(5/6)

1.28

0.30

Monocytes

4.6 ± 2.2

5.2 ± 0.7

11(5/6)

2.66

0.29

Eosinophils

11.2 ± 3.5

13.2 ± 3.2

11(5/6)

0.00

0.98

Nest success/attempt

27.8%

42.1%

37(18/19)

1.20

0.27

Fledglings/successful brood

3.4 ± 0.40

3.75 ± 0.16

13(5/8)*

0.72

0.40

Nestling body mass

23.1 ± 0.55

22.4 ± 0.52

44(17/27) [13(5/8)1]

0.85

0.36

Nestling agglutination (titer)

2.0 ± 0.45

1.6 ± 0.36

40(15/25) [13(5/8)1]

1.17

0.28

Nestling haptoglobin (mg/ml)

0.23 ± 0.01

0.24 ± 0.02

42(15/27) [13(5/8)1]

0.24

0.63

  1. Shown are mean values, standard errors and sample sizes per treatment group. Statistical analyses can be found in Results and in Additional file 1: Table S3. *Number of successful nests, not number of fledglings; 1number of nests.