“…Significant heterozygote deficiency was also found in this study, and corroborate by the positive Fis (0.29, P) which indicates and excess of homozygous animals within each population. There are several possible explanations (relatively high levels of inbreeding, null alleles, aneuploidy, molecular imprinting, selection, Wahlund effect) which have been discussed extensively elsewhere (Fujio et al, 1983;Zouros and Foltz, 1984;Mallet et al, 1985;Gaffney et al, 1990;Beaumont, 1991;Toro and Vergara, 1995). No one of these seems either sufficient or plausible alone for M. chilensis, and the overall deficit probably results from several small effects, all tending to reduce heterozygosity, which add to a significant overall deficit.…”