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Founders of the Mexican Wolf SSP The captive population represents three distinct lineages or captive lines: McBride or Certified lineage (which has been managed the longest under the SSP) founders 5, 11, and Wild1; Aragon lineage-founders 209 and 210, and the Ghost Ranch lineage-founders 293 and 294. McBride lineage #5, #11 and the unknown wild sire of #6, #7, #8, #9 and #10. Multilocus DNA fingerprint data, and age and capture location information suggest that the wild-caught #2 is not a founder but is related to the other founders of this lineage. The most likely scenario is that #2 is the offspring of #5 and the unknown wild sire noted above. (See McBride 1980, Fain et al. 1995, Hedrick 1995). Ghost Ranch lineage #293 and #294. (See Ames 1980) Aragon lineage #209, #210 These two wolves were not wild-caught, but were “found in captivity.” Based on genetic evaluation, this captive lineage is not known to share common ancestors with the other two captive Mexican wolf lineages. (See López-Islas and Vázquez-Gonzáles 1993, Hedrick 1995, Vázquez-Gonzáles and López-Islas 1995). The Goal The original goal for representation from the three lineages when they were initially combined was 80% McBride, 10% Ghost Ranch and 10% Aragon. The reason for the original representation goal was that the McBride lineage has been managed the longest under the guidelines of the SSP, to maintain gene diversity and equalize founder representation, where as both the Ghost Ranch and Aragon lineages have been heavily inbred over time and actually represent less than two founders for each lineage. After these levels were reached it was determined that the Ghost Ranch and Aragon lineages will slowly increase their percentages within the population as their lines continued to be crossed and back crossed.
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