Ne (Tamanho efetivo)

The effective population size (Ne) calculator estimates the number of individuals contributing genetically to a population. The formula used is Ne = 4 × Nm × Nf / (Nm + Nf), where Nm and Nf represent male and female population sizes. This metric is critical in population genetics to assess genetic diversity and inbreeding risks.

This formula assumes ideal conditions like random mating, no natural selection, or migration. However, real populations often deviate from these assumptions, affecting accuracy. For example, imbalances between Nm and Nf, such as in sex-biased populations, reduce Ne, increasing genetic variability loss.

This tool is valuable in conservation studies, population genetics, and livestock management. It is commonly used to compare genetic sustainability across groups or design biodiversity strategies. Caution: avoid use in very small populations (under 50 individuals) or complex family structures, as the calculation may underestimate real risks.

Although simple, the formula has limitations. It does not account for population size fluctuations over time, mutations, or gene flow. In real-world scenarios, complement it with other metrics like allelic diversity or inbreeding analysis for a more robust assessment.