The contributions of distinct populations to annual harvests provide key insights to conservation, especially in migratory species that return to specific reproductive areas. In this context, genetic stock identification (GSI) requires reference samples from source populations to assign harvested individuals, yet sampling might be challenging as reproductive areas could be remote and/or unknown. To investigate intraspecific va...

Effective population size ( N e ) is a particularly useful metric for conservation as it affects genetic drift, inbreeding and adaptive potential within populations. Current guidelines recommend a minimum N e of 50 and 500 to avoid short‐term inbreeding and to preserve long‐term adaptive potential respectively. However, the extent to which wild populations reach these thresholds globally has not been investigated, nor has the...

Foraging decisions shape the structure of food webs. Therefore, a behavioural shift in a single species can potentially modify resource‐flow dynamics of entire ecosystems. To examine this, we conducted a field experiment to assess foraging niche dynamics of semi‐arboreal brown anole lizards in the presence/absence of predatory ground‐dwelling curly‐tailed lizards in a replicated set of island ecosystems. One year after experim...

Many populations are small and isolated with limited genetic variation and high risk of mating with close relatives. Inbreeding depression is suspected to contribute to extinction of wild populations, but the historical and demographic factors that contribute to reduced population viability are often difficult to tease apart. Replicated introduction events in non‐native species can offer insights into this problem because they...

Hybridisation is increasingly recognised as an important cause of diversification and adaptation. Here, we show how divergence in male secondary sexual characters between two lineages of the common wall lizard ( Podarcis muralis ) gives rise to strong asymmetries in male competitive ability and mating success, resulting in asymmetric hybridisation upon secondary contact. Combined with no negative effects of hybridisation on su...

Establishing the introduction pathways of alien species is a fundamental task in invasion biology. The common wall lizard, Podarcis muralis, has been widely introduced outside of its native range in both Europe and North America, primarily through escaped pets or deliberate release of animals from captive or wild populations. Here, we use Bayesian clustering, approximate Bayesian computation ( ABC ) methods and network analyse...