The genetic signature of recent speciation in manta rays (Manta alfredi and M. birostris)

Kashiwagi, Tom, Marshall, Andrea D., Bennett, Michael B. and Ovenden, Jennifer R. (2012) The genetic signature of recent speciation in manta rays (Manta alfredi and M. birostris). Molecular Phylogenetics and Evolution, 64 1: 212-218. doi:10.1016/j.ympev.2012.03.020


Author Kashiwagi, Tom
Marshall, Andrea D.
Bennett, Michael B.
Ovenden, Jennifer R.
Title The genetic signature of recent speciation in manta rays (Manta alfredi and M. birostris)
Formatted title
The genetic signature of recent speciation in manta rays (Manta alfredi and M. birostris)
Journal name Molecular Phylogenetics and Evolution   Check publisher's open access policy
ISSN 1055-7903
1095-9513
Publication date 2012-07
Sub-type Article (original research)
DOI 10.1016/j.ympev.2012.03.020
Volume 64
Issue 1
Start page 212
End page 218
Total pages 7
Place of publication Maryland Heights, MO, United States
Publisher Academic Press
Collection year 2013
Language eng
Formatted abstract
Manta rays have been taxonomically revised as two species, Manta alfredi and M. birostris, on the basis of morphological and meristic data, yet the two species occur in extensive mosaic sympatry. We analysed the genetic signatures of the species boundary using a portion of the nuclear RAG1 (681 base pairs), mitochondrial CO1 (574. bp) and ND5 genes (1188. bp). The assay with CO1 sequences, widely used in DNA barcoding, failed to distinguish the two species. The two species were clearly distinguishable, however, with no shared RAG1 or ND5 haplotypes. The species were reciprocally monophyletic for RAG1, but paraphyletic for ND5 sequences. Qualitative evidence and statistical inferences using the 'Isolation-with-Migration models' indicated that these results were better explained with post-divergence gene flow in the recent past rather than incomplete lineage sorting with zero gene flow since speciation. An estimate of divergence time was less than 0.5. Ma with an upper confidence limit of within 1. Ma. Recent speciation of highly mobile species in the marine environment is of great interest, as it suggests that speciation may have occurred in the absence of long-term physical barriers to gene flow. We propose that the ecologically driven forces such as habitat choice played a significant role in speciation in manta rays.
Keyword Habitat choice
Hybridization
Lineage sorting
Mosaic sympatry
Pleistocene
Speciation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 5 April 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
Project Manta
School of Biomedical Sciences Publications
 
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Created: Tue, 22 May 2012, 15:43:42 EST by Bacsweet Kaur on behalf of School of Biomedical Sciences