Molecular evidence for genetic subdivision of Antarctic krill (Euphausia superba Dana) populations.

Antarctic krill (Euphausia superba Dana) is a key species in the Antarctic food web and occurs on a circumcontinental scale. Population genetic structure of this species was investigated by sequence analysis of the ND1 mitochondrial gene in four population samples collected at different geographical...

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Bibliographic Details
Main Authors: Zane, L, Ostellari, L, Maccatrozzo, L, Bargelloni, L, Battaglia, B, Patarnello, T
Format: Text
Language:English
Published: 1998
Subjects:
Research Article
Antarctic
The Antarctic
Antarc*
Antarctic Krill
Euphausia superba
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1689534
http://www.ncbi.nlm.nih.gov/pubmed/9921678
Description
Summary:Antarctic krill (Euphausia superba Dana) is a key species in the Antarctic food web and occurs on a circumcontinental scale. Population genetic structure of this species was investigated by sequence analysis of the ND1 mitochondrial gene in four population samples collected at different geographical localities around the Antarctic continent. Results indicate the existence of significant genetic differences between samples, and we suggest that oceanographic barriers could be sufficiently strong and temporally stable to restrict gene flow between distinct areas. Moreover, our data indicate that Antarctic krill is not at mutation-drift equilibrium and that the species possibly has a low effective population size as compared to the census size.

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