Dormouse population fragmentation has created genetically isolated groups, with genetic management through translocation being important for both conservation and individual welfare outcomes.
Dormouse population genetic welfare links individual animal welfare to population genetics in ways that are not always immediately apparent. Inbreeding in small, isolated populations leads to expression of deleterious recessive alleles - genetic variants that reduce fitness through compromised immune function, reduced reproductive success, and increased susceptibility to disease. Individual dormice in highly inbred populations may experience welfare harm through these fitness-reducing effects over their lifetimes, quite separate from direct welfare harms from habitat quality or predation. Translocation of genetically diverse individuals from source populations into isolated recipient groups introduces genetic diversity that reduces inbreeding depression - a welfare benefit to future generations of dormice in the recipient population. The welfare of translocated animals during the process (capture, handling, transport, release) represents an acute welfare cost that must be managed carefully and weighed against the long-term genetic welfare benefit. Non-invasive genetic monitoring using hair samples collected from nest tubes avoids the welfare cost of capture while providing population genetic data, representing an excellent example of the 3Rs (Replacement of invasive methods) applied to wildlife conservation welfare.