Incipient sympatric speciation in Midas cichlid fish from the youngest and one of the smallest crater lakes in Nicaragua due to differential use of the benthic and limnetic habitats?

A. F. Kautt was supported by the Landesgraduiertenförderung (LGFG) of the State of Baden-Württemberg and the International Max Planck Research School (IMPRS) for Organismal Biology. G. Machado-Schiaffino was supported by the Alexander von Humboldt Foundation and a grant from the Deutsche Forschungsgemeinschaft (MA 6144/1-1). J. Torres-Dowdall was supported by an EU FP7 Marie Curie Zukunftskolleg Incoming Fellowship Program of the University of Konstanz (grant number 291784) and a grant from the Deutsche Forschungsgemeinschaft (TO 914/2-1). The study was funded by support of the University of Konstanz and a European Research Council advanced grant (ERC “GenAdap” 293700) to A. Meyer.