Fisheries Research Articles

DNA barcoding in Nautilus pompilius (Mollusca : Cephalopoda): evolutionary divergence of an ancient species in modern times

Document Type

Article

Publication Date

12-19-2012

Journal Title

Invertebrate Systematics

ISSN

Print: 1445-5226 Electronic: 1447-2600

Keywords

CoxI, Conservation, Population genetics

Disciplines

Aquaculture and Fisheries | Biology | Ecology and Evolutionary Biology | Environmental Monitoring | Physical and Environmental Geography | Population Biology | Structural Biology

Abstract

DNA barcoding studies to elucidate the evolutionary and dispersal history of the current populations of Nautilus pompilius allow us to develop a greater understanding of their biology, their movement and the systematic relationships between different groups. Phylogenetic analyses were conducted on Australian N. pompilius, and COI sequences were generated for 98 discrete accessions. Sequences from samples collected across the distribution were sourced from GenBank and included in the analyses. Maximum likelihood revealed three distinct clades for N. pompilius: (1) populations sourced from west Australia, Indonesia and the Philippines; (2) populations collected from east Australia and Papua New Guinea; (3) western Pacific accessions from Vanuatu, American Samoa and Fiji, supporting previous findings on the evolutionary divergence of N. pompilius. A minimum spanning tree revealed 49 discrete haplotypes for the 128 accessions, from a total of 16 discrete sampling locations. Population similarity reflects oceanic topographic features, with divergence between populations across the N. pompiliusrange mirroring geographical separation. This illustrates the success of DNA barcoding as a tool to identify geographic origin, and looks to the future role of such technology in population genetics and evolutionary biology

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Digital Object Identifier (DOI)

https://doi.org/10.1071/IS12023