these four commands download the pink salmon genotype data files (in Plink format: bed/bim/fam) and the census population size estiamtes.
wget http://people.binf.ku.dk/cetp/popgen/pink_salmon/pink_salmon.bed --directory-prefix ./data
wget http://people.binf.ku.dk/cetp/popgen/pink_salmon/pink_salmon.bim --directory-prefix ./data
wget http://people.binf.ku.dk/cetp/popgen/pink_salmon/pink_salmon.fam --directory-prefix ./data
wget http://people.binf.ku.dk/cetp/popgen/pink_salmon/Nc_estimates.txt --directory-prefix ./data