CQUniversity
Browse

File(s) not publicly available

Genetic diversity of isolated populations of Nautilus pompilius (Mollusca, Cephalopoda) in the Great Barrier Reef and Coral Sea

journal contribution
posted on 2017-12-06, 00:00 authored by W Sinclair, Leica Briskey, William Aspden, Graham Pegg
Nautilus species are the only remaining cephalopods with an external shell. Targeted heavily by the shell trade across their distribution area, these species have a poorly known population structure and genetics. Molecular techniques have been used to assess levels of inter- and intrapopulation genetic diversity in isolated populations of Nautilus in the northern sections of theGreat Barrier Reef (GBR), Australia and in the Coral Sea. Distinct populations, physically separated by depths in excess of 1,000 m were examined. RAPD analysis of genetic differences showed limited differentiation of the ‘‘Northern GBR’’ populations and the ‘‘Coral Sea’’ populations. Discrimination between the two geographic groups was observed from these data. In addition, partial sequencing of the CoxI gene region, yielded 575 bp of sequence, which was aligned for 43 samples and phylogenetic trees constructedto examine genetic relationships. Two distinct clades were resolved in the resulting trees, representingthe ‘‘Northern GBR’’ and ‘‘Coral Sea’’population groups. Inter- and intra-population relationships are presented and discussed. The differentiation of the Nautilus populations from the Northern section of the Great Barrier Reef and those from the Coral Sea were supported by two distinctly different methodologies and the significance of this separation and the potential evolutionary divergence of these two population groups is discussed.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

17

Start Page

223

End Page

235

Number of Pages

13

eISSN

1573-5184

ISSN

0960-3166

Location

Netherlands

Publisher

Springer

Language

en-aus

Peer Reviewed

  • Yes

Open Access

  • No

External Author Affiliations

Faculty of Sciences, Engineering and Health; Marine Molecular Genetics Group; TBA Research Institute;

Era Eligible

  • Yes

Journal

Reviews in fish biology and fisheries.