Contrasting population genetic structure of Siganus sutor between mainland coastal and oceanic island populations
(English)Manuscript (preprint) (Other academic)
Studies on genetic connectivity are important for the management of fisheries. In this study we used AFLP to investigate population structure of the endemic Spinefoot shoemaker, Siganus sutor, from 6 countries, Kenya, Tanzania, Comoros, Seychelles and Mauritius in the Western Indian Ocean. We collected 506 samples from 20 fish landing sites, 171 variable loci were used in the statistical analysis. Global FST was significant and showed a pattern of isolation by distance, mostly influenced by remote oceanic islands. In a previous study we have described the temporal variation of Siganus sutor to be about 1/5 of the global variation, and by applying a 1/5 of the global variation cut of value for the pair-wise comparisons we were able to account some of the pair- wise genetic variation as temporal fluctuations. A STRUCTURE analysis was also preformed that corroborates the pair-wise FST comparisons. Overall these results show that S. sutor is genetically diverse and subdivided throughout the region, but also that the current management regime might not be optimal.
AFLP, siganu sutor, east africa, populations
Research subject Animal Ecology
IdentifiersURN: urn:nbn:se:su:diva-92575OAI: oai:DiVA.org:su-92575DiVA: diva2:639918
FunderSida - Swedish International Development Cooperation Agency