Inter-Research > MEPS > v517 > p251-263  

MEPS 517:251-263 (2014)  -  DOI: https://doi.org/10.3354/meps11061

Population genetic structure of Lepidonotothen larseni revisited: cyb and microsatellites suggest limited connectivity in the Southern Ocean

Malte Damerau1,*, Walter Salzburger2, Reinhold Hanel

1Thünen Institute of Fisheries Ecology, Palmaille 9, 22767 Hamburg, Germany
2Zoological Institute, University of Basel, Vesalgasse 1, 4051 Basel, Switzerland
*Corresponding author:

ABSTRACT: Antarctic fishes (Notothenioidei) are characterized by unusually long pelagic larval stages of up to more than 1 yr, and population genetic studies on notothenioids have often revealed insignificant population differentiations over large geographic scales. Hence, gene flow by passive larval dispersal with ocean currents is often assumed to be predominant among notothenioid populations. We re-examined the genetic population structure of the semi-pelagic painted notothen Lepidonotothen larseni in the Atlantic sector of the Southern Ocean based on cytochrome b gene sequences and microsatellite markers, for which absence of population structure had been inferred in a preliminary study. Our new results suggest restricted gene flow between populations and low levels of successful dispersal with the currents. Hence, long pelagic larval phase durations do not translate into high genetic exchanges. In addition, we provide evidence based on Bayesian skyline plots of increasing population sizes in this sub-Antarctic species since the last glacial maximum.


KEY WORDS: Notothenioidei · Antarctic icefishes · Larval dispersal · Gene flow · Bayesian skyline plots


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Cite this article as: Damerau M, Salzburger W, Hanel R (2014) Population genetic structure of Lepidonotothen larseni revisited: cyb and microsatellites suggest limited connectivity in the Southern Ocean. Mar Ecol Prog Ser 517:251-263. https://doi.org/10.3354/meps11061

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