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Table 2 Least-squares (LS) means (kg) and adjustment factors for effects of birth type, dam age class, and their interaction on lamb birth weights

From: Effects of birth-rearing type on weaning weights in meat sheep are systematically associated with differences in mean performance among flocks

Data set Dam age class, years LS means for birth type Additive adjustment (kg) for birth type Multiplicative adjustment for birth type
1 2 3 Average 1 3 1 3
Core 2 6.31 ± 0.04 5.22 ± 0.03 4.44 ± 0.05 5.33 ± 0.03 −1.09 0.78 0.83 1.18
  3 to 6 6.61 ± 0.03 5.71 ± 0.03 4.90 ± 0.03 5.74 ± 0.02 −0.90 0.81 0.86 1.17
Yearlinga 1 5.67 ± 0.04 4.53 ± 0.04 - 5.10 ± 0.04c −1.14 - 0.80 -
  3 to 6 6.59 ± 0.04 5.66 ± 0.03 - 6.06 ± 0.03c −0.91 - 0.86 -
Aged damsb 3 to 6 6.51 ± 0.03 5.64 ± 0.03 4.83 ± 0.03 5.66 ± 0.03 −0.87 0.81 0.87 1.17
  >6 6.48 ± 0.06 5.56 ± 0.04 4.68 ± 0.06 5.57 ± 0.04 −0.92 0.88 0.86 1.19
  1. aIncludes flocks from the core dataset that also have at least 50 records on yearling dams
  2. bincludes flocks from the core dataset that also have at least 50 records on aged dams
  3. cexcludes triplet lambs