Population Bottleneck Calculator

Calculate genetic diversity loss and recovery after population bottleneck events.

Bottleneck Parameters

Original Population

Bottleneck Size

Bottleneck Duration (generations)

Initial Heterozygosity

Initial Alleles

Recovery Rate (r)

Recovery Time (generations)

Mild Bottleneck

99.5%

Population Reduced

4.90%

Heterozygosity Lost

Post-Bottleneck Heterozygosity

After 5 generations

0.6657

Alleles Retained

Of 20 original

19.9

Alleles Lost

0.6% of diversity

0.1

Inbreeding Coefficient (F)

Due to bottleneck

0.0490

Time to 90% Recovery>50 generations

Final Heterozygosity0.6054

Total Het Loss13.51%

Long-term Ne181.9

Genetic Load13.51%

Gen 0N=50, H=0.6657

Gen 5N=80, H=0.6411

Gen 10N=129, H=0.6265

Gen 15N=206, H=0.6177

Gen 20N=328, H=0.6123

Gen 25N=518, H=0.6092

Gen 30N=812, H=0.6073

Gen 35N=1250, H=0.6062

Gen 40N=1881, H=0.6057

Gen 45N=2738, H=0.6054

Gen 50N=3813, H=0.6054