Mitochondrial DNA Polymorphism (CO1) of Three Dominant
Copepod Species in the South Atlantic

A. N. Stupnikova^a, D. N. Kulagin^a, T. V. Neretina^b, and N. S. Mugue^c

^a Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia

^b White Sea Biological Station, Department of Biology, Moscow State University, Primorsky Settlement,
Murmansk oblast, Russia

^c Russian Federal Research Institute of Fisheries and Oceanography (VNIRO), Moscow, Russia

e-mail: astupnikova@gmail.com

Received May 05, 2012

Abstract—The Southern Ocean is characterized by the complex system of oceanic fronts that maintain the lat-
itudinal zonality of biotopes. These fronts are boundaries of water masses with different hydrophysical charac-
teristics. We explore the genetic differentiation of the dominant zooplankton species in regards to the complex
hydrophysical zonality of the Southern Ocean. The barcoding region of mitochondrial CO1 gene was
sequenced for three copepod species, Calanus simillimus, Rhincalanus gigas, and Metridia lucens. These spe-
cies are the most abundant in the Southern Ocean and form the basis of the zooplankton community. Genetic
differentiation was found neither for Calanus simillimus nor for Rhincalanus gigas. The mitochondrial haplo-
types of Metridia lucens cluster in two genetically distant groups (Subantarctic and Antarctic) found together
only in the Polar Front Zone.

DOI: 10.1134/S0001437013040140

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