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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.