Lecture 17 - BIO220

1998 science 282 1695 1698 prairie habitat is

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Unformatted text preview: ur interrupted by decreasing population size -Introduction of novel genotypes is increasing population size Translocations from diverse populations 22 Westemeier et al. 1998 Science 282: 1695 1698 -Prairie habitat is declining -Remaining individuals are becoming more and more related Wolves in Scandinavia: hunted to near extinction • As of 1960’s: thought to be extirpated from the region •New pack/family discovered in 1983, with ~10 individuals •Inbreeding depression, low Ne should be seen • Egg hatching and male population size declining • Translocations began in 1992 – Egg hatching and breeding male numbers began to improve 100 12 50 8 4 0 0 1983 23 -Red arrow: male population is declining -Yellow arrow: lower % of eggs are hatching -Introduction of individuals from other remaining populations in 1992 helps: Male population begins to increase and the egg h atching % also increases! 1991 Number of breeding packs Estimated population size •A single immigrant wolf arrives in 1991... •What are the consequences? 2001 Vila et al. 2003 Proc Roy Soc B 270: 91 97 24 -After the immigrant was introduced , the population size i mmediately increased 4 13/03/2013 Genetic and behavioral effects Wolves in Scandinavia: hunted to near extinction Founding Mother of Population • As of 1960’s: thought to be extirpated from the region •New pack/family discovered in 1983, with ~10 individuals •Inbreeding depression,...
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