Preserving a living population

A landrace may retain useful variation that is poorly captured by one ideal photograph. Preservation questions therefore include which surviving families are represented and which local husbandry knowledge is associated with them. The goal is to retain the population's inherited resource, not merely reproduce a dark duck with a white breast patch.

The breed's limited foundation makes changes in breeding representation important, but an exact present census should not be inferred from historical anecdotes. FAO's framework distinguishes the size of a population from the way breeding contributions are distributed. This library can explain that distinction now while leaving later record collection and formal population assessment to properly documented work.