Summary
A small, isolated tiger population in Thailand's Dong Phayayen-Khao Yai Forest Complex faces significant genetic decline without intervention. Research using individual-based, spatially-explicit population modeling reveals that frequent translocations of four females every generation or every other generation are necessary to prevent substantial loss of heterozygosity and allelic richness. Female-biased introductions consistently produce higher population size and genetic diversity compared to equal numbers of males. Despite potential population increases through translocations, long-term genetic diversity may not be preserved unless applied frequently, underscoring the importance of incorporating realistic genetic processes in conservation strategies for small populations.
Citation
Ash, E., Cushman, S., Kaszta, Ż., Landguth, E., Redford, T., & Macdonald, D. W. (2023). Female-biased introductions produce higher predicted population size and genetic diversity in simulations of a small, isolated tiger (Panthera tigris) population. Scientific Reports, 13(1). https://doi.org/10.1038/s41598-023-36849-z