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Table 2 Correlations between eggshell colouration and haematological and reproductive traits in first, unmanipulated clutches

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

Trait Mean BGC
N R P
Female mass 63 0.27 0.03
Haematocrit 55 −0.16 0.23
Haemoglobin 55 −0.18 0.20
Laying date 63 0.00 0.97
Mean egg mass 63 −0.01 0.95
Clutch size 63 0.01 0.97
  1. Analyses include females that were not observed to produce a replacement clutch. For all traits except for female mass, analyses include female mass as a partial variable in the CORR procedure