Incorporating non-baseline characters into genetic mixture analyses

•Population-specific differences in non-baseline characters can be estimated from a mixture.•Non-baseline characters only slightly improved estimates of population proportions in a mixture.•Non-baseline characters are more useful in assigning population identities to individuals.•Non-baseline characteristics may be useful in other ways; e.g., age and size is related to mortality.•Individual assignment allows better spatio-temporal resolution than mixture analysis.