DSC Publications

Core Information
Title: A possible explanation for the population size discrepancy in tuna (genus Thunnus) estimated from mitochondrial DNA and microsatellite data
Abstract: A recent study using both mitochondrial DNA (mtDNA) and microsatellite data reported on a population size discrepancy in the eastern tiger salamander where the effective population size (Ne) estimate of the former exceeded that of the latter. That study suggested, among other hypotheses, that homoplasy of microsatellite alleles is responsible for the discrepancy. In this investigation, we report 10 new cases of a similar discrepancy in five species of tuna. These cases derive from our Bayesian inferences using data from Pacific Bluefin Tuna (Thunnus orientalis) and Yellowfin Tuna (Thunnus albacares), as well as from published estimates of genetic diversity for additional populations of Yellowfin Tuna and three other tuna species. Phylogenetic character analyses of inferred genealogies of Pacific Bluefin and Yellowfin Tuna reveal similar reduced levels of mtDNA and microsatellite homoplasy. Thus, the discrepancy between inferred population sizes from mtDNA and microsatellite data in tuna is most likely not an artifact of the chosen mutation models used in the microsatellite analyses, but may reflect behavioral differences between the sexes such as female-biased philopatry and male-biased dispersal. This explanation now warrants critical testing with more local populations of tuna and with other animal and plant groups that have different life histories.
Keywords: Effective population size, Tuna, Genealogy, Homoplasy, Male-biased dispersal, Natal homing
Author Information
1. Qiu, Fan[ UF/Biology ]Graduate
2. Kitchen, Andrew[ Penn State ]Post doc
3. Beerli, Peter[ FSU/DSC ]Neither
4. Miyamoto, Michael M[ UF/Biology ]Neither
Detailed Scientific Article Information
Journal Name: Molecular Phylogenetics and Evolution
Volume: -
Page Range: -
Article Number: Not Provided
Number of Pages: Not Provided
Year of Publication: 2012
Refereed: Yes
Digital Object Identifier (DOI), if available: 10.1016/j.ympev.2012.05.002
Official Url: http://www.sciencedirect.com/science/article/pii/S1055790312001674
ISSN: Not Provided
Subjects Information
1. Biology

Contact: pubs@sc.fsu.edu