and data for endangered livestock breeds in Spain.

Improvements in storage of genetic and reproductive materials offer an alternative for endangered livestock breed conservation. This paper presents a dataset for current collections and population for 179 Spanish livestock breeds of seven species, cattle, sheep, pig, chicken, goat, horse and donkey. data was obtained via survey administered to 18 functioning gene banks in Spain and relates to the reproductive genetic materials (semen doses) of 210 livestock breeds distributed across the gene banks. data combines CENSUS information with linear regression techniques and relates to the geographic distribution of 179 Spanish autochthonous livestock breeds (2009-2018), and population projections and extinction probabilities (2019-2060). We use a decision variable defining an "acceptable level of risk" that allows decision makers to specify tolerable levels of breed endangerment when taking collection and storage decisions.