Genetic variation, demographic history and phylogeography of tire track eel, Mastacembelus favus (Synbranchiformes: Mastacembelidae) in Southeast Asia

The complex climatic and geological history of Southeast Asia has been hypothesised to determine the most important aspects of the current phylogeographical structure and distribution of living organisms throughout the region. To test existing hypotheses, the genetic structure of the tire track eel,...

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Bibliographic Details
Published in:Hydrobiologia 2019-07, Vol.838 (1), p.163-182
Main Authors: Jamaluddin, Jamsari Amirul Firdaus, So, Nam, Tam, Bui Minh, Ahmad, Amirrudin, Grudpan, Chaiwut, Page, Lawrence M., Khaironizam, Md. Zain, Mohd Nor, Siti Azizah
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Catadromous fishes
Current distribution
Cytochrome b
Cytochromes
Demographics
Deoxyribonucleic acid
Dispersal
DNA
Drainage
Drainage patterns
Ecology
Eels
Fishes
Freshwater & Marine Ecology
Genetic aspects
Genetic diversity
Genetic research
Genetic structure
Geological history
Haplotypes
Life Sciences
Marine fishes
Mastacembelus favus
Mitochondrial DNA
Pleistocene
Population growth
Primary Research Paper
Rivers
Zoology
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Summary:The complex climatic and geological history of Southeast Asia has been hypothesised to determine the most important aspects of the current phylogeographical structure and distribution of living organisms throughout the region. To test existing hypotheses, the genetic structure of the tire track eel, Mastacembelus favus, was investigated using 823 bp of mitochondrial DNA cytochrome b from 469 individuals from 51 localities encompassing its native range. The results classified all haplotypes into two major lineages, Lineage 1, which was further divided into Lineages 1a (lower Mekong, eastern Gulf of Thailand and Malay—Thai Peninsula), 1b (Banpakong River), 1c (Chao Phraya, Gulf of Thailand and Malay—Thai Peninsula) and 1d (Khlang Yai River), and Lineage 2, the upper reaches of the lower Mekong and the middle Mekong. Strong genetic discontinuities dated approximately 5 MYA were discovered in the Mekong with limited geographical overlap, suggesting a historically dissected drainage between two sections and species colonisation via different routes. The widespread Lineage 1 showed a strong signature of population expansion during the Pleistocene climate oscillation. Haplotype characteristics in the Malay—Thai Peninsula are hypothesised to result from postglacial dispersal from the Mekong and Chao Phraya through an extended Pleistocene drainage network.
ISSN:0018-8158
1573-5117
DOI:10.1007/s10750-019-03987-3