One side from each carcass was dissected into knifeseparable
components of subcutaneous fat, intermuscular
fat, internal fat, lean, and bone to determine physical
composition. Analysis followed a 2 × 2 factorial arrangement
with breed-type (Boer × Spanish and Spanish)
and feeding regimen (feedlot and range) as the
main effects. All data were analyzed with PROC GLM
(SAS, 1991). Analyses were conducted with a model
that included breed-type (Boer × Spanish and Spanish)
and feeding regimen (feedlot and range) as main effects
and the two-way interaction between them. Least
squares means were estimated, and mean separation
was performed using pairwise t-tests (α = .05). A second
model was used for carcass yield traits, which also included
live weight as a covariate in order to compare
carcass traits adjusted for differences in live weight