Population genetic structure of the pseudo-crab Aegla uruguayana Schmitt, 1942 (Decapoda, Aeglidae) in the central region of Argentina.

GIRI FEDERICO; OJEDA GUILLERMO; RUEDA EVA; AMAVET PATRICIA; WILLINER VERONICA; COLLINS PABLO AGUSTIN

CRUSTACEANA

BRILL ACADEMIC PUBLISHERS

Lugar: Leiden; Año: 2014 vol. 87 p. 414 - 429

0011-216X

Aeglidae is the only family of freshwater group Anomura. Aegla uruguayana Schmitt, 1942 is one of the most widely distributed species in Argentina and found different kinds of environments making it a kind of great interest for population genetic studies. The main objective of this work was to analyze the genetic structure of the population of A. uruguayana along a gradient for four populations that were studied in the central region of east-west Argentina, with a range of 1100 km in the Plata basin. The studied populations were: Río Tercero Reservoir; Setúbal Lagoon; Doll Stream; Urquiza Stream. Crab DNA was extracted using a commercial kit that was amplified with ISSR markers. Of the 10 primers tested, we selected four that showed the best resolution and reproducible results. Our studies revealed a mean He of 0.3479 (±0.1383) and a global FST = 0.35832 (p <0.0001), showing that there is genetic differentiation among populations while the gene flow is low. The Urquiza Stream population showed genetic structure and a clear differentiation from the other populations. However, Río Tercero, Setúbal and Doll populations were observed well grouped, showing one effective connection among them. The geomorphologic history of the basin provides evidence for the hypothesis of isolation. It shows the importance of know geoclimatic history in the region of study and the importance to use, as evidence, a complete population distribution were the species live. These data permits interpret that the different populations have, in minor or major degree, relatively independently history delineated by the geomorphologic events occurred in the history of earth.