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Improving the management of a highly inbred species: the case of the white-winged wood duck Cairina scutulata in captivity

1993; Elsevier BV; Volume: 64; Issue: 1 Linguagem: Inglês

10.1016/0006-3207(93)90410-3

1873-2917

C. Tomlinson, Georgina M. Mace, Jeffrey M. Black, Nigel Hewston,

Animal Nutrition and Physiology

Studbook data on captive White-winged Wood Duck were analysed to help in the forward planning o f an ongoing breeding programme.Conservative assumptions were made to fill gaps in the data set and enable analyses.The population growth rate seems to have declined since 1985, but this is due at least in part to deliberate management decisions and to missing data.The present population o f 70 individuals is descended from just seven founders with a founder genome equivalent score o f2.58.This score could be improved only slightly by breeding to equalise the genetic contributions o f individual founders.The data were analysed to assess the minimum viable population size required to maintain a population with 90% heterozygosity retainedfor 200 years.A realistic minimum population size o f 500 to 600 could achieve this goal only with an increase in the number o f founders to between ten and 20, and an increase in the ratio o f effective to census population size.The planned establishment o f an international studbook will improve the data available and may lead to more optimistic analyses.