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Division of Population Genetics Stockholm Ilniversity S-106 9 1 Stockholm, Sweden LINDA LAIKRE Division of Population Genetics Stockholm University S-106 91 Stockholm,Sweden Introduction The genetically effective population size ( N E , )is a key parameter in conservation biology, because the rate o f inbreeding ( AF),and thereby the rate of loss of genetic heterozygosity, is proportional to the inverse of the effective number (AF = 1/2Ne; e.g., Crow & Kimura 1970). The importance of maintaining large effective sizes of natural and captive populations is reflected by the considerable fraction of the literature on biological conservation that focuses on that issue (e.g., Flesness 1977; Ryman & S t a l 1980; Ryman et al. 1981; Frankel & Soule 1981; Soule et al. 1986; Allendorf & Ryman 1987; Lande & Barrowclough 1987). This note addresses a problem in conservation genetics that, to our knowledge, has not been previously recognized: the reduction of the genetically effective population size that may result from breeding-release programs aimed at supporting natural populations. Typically, in such programs a fraction of the wild parents (or their offspring) are brought into captivity for reproduction or preferential survival, and the offspring are released into the natural habitat
Conservation Biology – Wiley
Published: Sep 1, 1991
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