title: High connectivity in Rastrelliger kanagurta: influence of historical signatures and migratory behaviour inferred from mtDNA cytochrome b.
abstract: Phylogeographic patterns and population structure of the pelagic Indian mackerel, Rastrelliger kanagurta were examined in 23 populations collected from the Indonesian-Malaysian Archipelago (IMA) and the West Indian Ocean (WIO). Despite the vast expanse of the IMA and neighbouring seas, no evidence for geographical structure was evident. An indication that R. kanagurta populations across this region are essentially panmictic. This study also revealed that historical isolation was insufficient for R. kanagurta to attain migration drift equilibrium. Two distinct subpopulations were detected between the WIO and the IMA (and adjacent populations); interpopulation genetic variation was high. A plausible explanation for the genetic differentiation observed between the IMA and WIO regions suggest historical isolation as a result of fluctuations in sea levels during the late Pleistocene. This occurrence resulted in the evolution of a phylogeographic break for this species to the north of the Andaman Sea.
authors.affiliation: Centre for Global Sustainability Studies, Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Noor Adelyna Mohammed
authors.initials: NA
authors.lastname: Akib
authors.affiliation: College of Aquaculture and Fisheries, Can Tho University, Can Tho city, Vietnam.
authors.forename: Bui Minh
authors.initials: BM
authors.lastname: Tam
authors.affiliation: Faculty of Science and Fisheries and Technology, Rajamangala University of Technology Srivijaya Trang Campus, Trang, Thailand.
authors.forename: Preeda
authors.initials: P
authors.lastname: Phumee
authors.affiliation: Department of Aquaculture, Faculty of Marine and Fishery, Universitas Syiah Kuala, Jl. T. Nyak Arief Darussalam, Banda Aceh, Indonesia.
authors.forename: Muchlisin Zainal
authors.initials: MZ
authors.lastname: Abidin
authors.affiliation: Persian Gulf and Oman Sea Ecological Research Institute, Bandar Abbass, Iran.
authors.forename: Saied
authors.initials: S
authors.lastname: Tamadoni
authors.affiliation: Earth, Environmental and Biological Sciences, Queensland University of Technology, Brisbane, Queensland, Australia.
authors.forename: Peter B
authors.initials: PB
authors.lastname: Mather
authors.affiliation: School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia; Centre for Marine & Coastal Studies, Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Siti Azizah Mohd
authors.initials: SA
authors.lastname: Nor
mesh_terms: D025041:Animal Migration; D000818:Animals; D045303:Cytochromes b / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000235:genetics*; D019143:Evolution, Molecular; D006239:Haplotypes; D010473:Perciformes / Q000235:genetics*; D058974:Phylogeography
chemical_list: D004272:DNA, Mitochondrial; D045303:Cytochromes b