Abstract
AbstractMovement of animals and plants from mainland populations contributes to the genetic diversity and viability of geographically isolated island biota, but also carries risks of pathogen introductions. The bat fauna of the island of Trinidad reflects species diversity on the neighbouring South American mainland and includes the common vampire bat (Desmodus rotundus). We determined relationships between Trinidad and mainland vampire bat populations and the extent of mainland-island movement by comparing the genetic structure (nuclear and mitochondrial) and morphology of the TrinidadianD. rotunduspopulation to populations in neighbouring regions of the South American mainland and estimating evolutionary histories and patterns of gene flow.Results indicate that TrinidadianD. rotundusare genetically and morphologically distinct from mainland populations, although limited unidirectional male-biased mainland to island gene flow occurs at an estimated rate of 3.3 migrants per year. Two geographically-definedDesmoduscytochromebclades were identified within Trinidad (i.e., one restricted to the South-Western peninsula which grouped with Venezuelan sequences and the other found throughout the rest of the island which grouped with sequences from Suriname and Guyana) suggesting long-standing female philopatry. The geographic distribution of these clades mirrors that of two previously identified geographically defined rabies virus (RABV) lineages introduced to Trinidad from the mainland. This finding suggests that bat dispersals and RABV introductions occur via both the northern and south-western island peninsulas, with subsequent male-driven intra-island viral spread enabled by bat nuclear homogeneity of these populations. These study findings will contribute to the development of contemporary evidence-based vampire bat population control and rabies prevention programs within island populations.
Publisher
Cold Spring Harbor Laboratory
Reference119 articles.
1. Koopman KF. Order Chiroptera. In: Wilson DE, Reeder DM, editors. Mammal species of the world: a taxonomic and geographic reference. Washington, D.C.: Smithsonian Institution Press; 1993. p. 137-241.
2. American Society of Mammalogists. The Mammal Diversity Database online 2022 [Available from: https://www.mammaldiversity.org/taxa.html.
3. Bats and zoonotic viruses: can we confidently link bats with emerging deadly viruses?
4. Rodriguez F. Animals of South America. Roe PG, editor. London: Orbis Publishers; 1978.
5. Phylogeographic population structure of Red-winged Blackbirds assessed by mitochondrial DNA