  We have investigated the evolution of the electronic properties of the t-t'-U
Hubbard model with hole doping and temperature. Due to the shape of the Fermi
surface, scattering from short wavelength spin fluctuations leads to strongly
anisotropic quasi-particle scattering rates at low temperatures near
half-filling. As a consequence, significant variations with momenta near the
Fermi surface emerge for the spectral functions and the corresponding ARPES
signals. This behavior is quite in contrast to the intermediate doping regime
and we discuss the possible relevance of our results for the interpretation of
photoemission spectra in cuprate superconductors at different hole doping
levels.
