  Using over 3000 compact groups (CGs) of galaxies extracted from mock
catalogues built from semi-analytical models of galaxy formation (SAMs), we
study whether the CG assembly channel affects the z=0 properties of galaxies
and their evolution. The evolution of CG galaxy properties with time is a clear
function of their stellar masses. For instance, high-stellar-mass CG galaxies
have lived their last 8 Gyr with little cold gas content while maintaining
their reservoir of hot gas, while low-mass CG galaxies still preserve some of
their cold gas content at the present but they have completely drained their
hot gas reservoir. Beyond that, we find that the evolution of CG galaxies is
also a function of the assembly history of the CGs: with more extreme losses of
gas content, faster mass gain rates for black holes and more marked suppression
of star formation as a function of cosmic time as we go from recent to early CG
assembly. Thus, CGs constitute another laboratory for galaxy assembly bias, as
the later assembling groups have later star formation. Our results show that
classifying CGs according to their assembly channel is a way of distinguishing
different paths by which galaxies transform their properties throughout their
history.
