|Breed name||Transboundary / brand name||Country||Year of earliest report||No. of breeding ♀ in most earliest report||Year of most recent report||No. of breeding ♀ in most recent report||Year of report used for growth rate estimate||No. of breeding ♀ of report used for growth rate estimate||Annual growth rate||Years to reach 1000 breeding ♀||Years to reach 100 breeding ♀||Expected inbreeding rate per year||Risk status (EAAP - National level)||Risk status (FAO - National level)||Risk status (FAO - Global level)|
1) Transboundary/brand name: the Transboundary name groups two or more breeds/populations highly genetically related, to avoid overestimation of erosion (see Empty Breed Data Sheet). It is used to determine the "Risk status FAO - Global level".
2) Report used for growth rate estimate - No. of breeding ♀ of report used for growth rate estimate: Information used to estimate Annual growth rate.
3) Annual growth rate: estimated as: anti-log((log(no. of breeding ♀ in most recent year of reporting) -log(no. of breeding ♀ of report used for growth rate estimate))/((year of most recent report)-(year of report used for growth rate estimate))). The report used for growth rate estimate is the report at least 5 years back from, and closest to, the most recent report.
4) Years to reach 1000 / 100 breeding ♀: are computed assuming constant annual growth rate, with a deterministic density independent growth model. Annual growth rate is blank if insufficient data are available to estimate it.
5) Expected inbreeding rate per year: is calculated as (1/(2xNe)) x (1/generation interval), where Ne is the effective population size computed assuming mass selection (see Notes in the Reports "Single breed population structure & inbreeding, through time" or "Comparing breeds on population structure & inbreeding, through time"). Inbreeding rate is not shown if insufficient data are available to estimate it.
6) Risk status: is currently computed in different ways, depending on criteria and thresholds considered. A revision of current systems is underway in order to achieve a uniform system across institutions. At this point of time, the table shows risk status following the criteria currently used by FAO and risk status following the criteria used by EAAP. Risk status is blank if insufficient data are available to estimate it. "Risk status FAO - Global level" is computed considering all breeds with the same transboundary name as one breed.
The EAAP criteria is based on expected cumulated inbreeding in the next 50 years and is applicable only to the Cattle, Buffalo, Sheep, Goat, Horse, Ass and Pigs breeds. A breed is classified as:
In case the number of herds is less than 10 and the number of breeding females is below 500 the breed is assigned to the upper class. In the number of breeding females is below 1000 and decreasing the breed is classified to the upper level. Alternatively, if the number of breeding females is below 1000 and annual growth rate is below 1 the breed is classified to the next higher EAAP endangerment class.