on samples from two brown-egg strains between 1967 and 1979 , `` '' residual '' '' food consumption ( i.e . food consumption corrected for body weight , weight change and egg mass ) of laying hens was investigated with respect to variation between sire families and phenotypic correlations with production traits , egg traits , morphological and physiological variables .
C0005910
r body weig
C0005911
, weight chan