are necessary for realistic predictions of that impact. In this context, preliminary appraisals that are based on a range of seemingly realistic parameter values may be helpful in identifying critical information that may be missing.

The above examples are aimed at illustrating some of the basic genetic problems associated with supportive breeding, rather than providing an inventory of all the factors that should be considered when designing a breeding program. Situations not discussed include unsuccessful supportive breeding (i.e., μc < μw), declining wild populations (μw < 2), variable number of captive breeders, preferentially selecting individuals of wild or captive origin for captive breeding, overlapping generations, and populations that crash when the support program is terminated. Some of these aspects have been discussed in the literature, and in addition to the citations given above, interested parties should consult the papers by Duchesne and Bernatchez (2002), Hedrick et al. (2000), Lynch and O’Hely (2001), Waples and Do (1994), and references therein.

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