Abstracts - Deutsche Zoologische Gesellschaft

48 Evolutionary Biology SymposiumO EB.20 (Mo) - ENSex-specific selection in common vole hybrid zonesGerald Heckel, Andreas SutterCMPG, Zoological Institute, University of Bern, SwitzerlandHybrid zones provide excellent opportunities to study evolutionary processes underlying speciation.The width of a contact zone relative to the species’ dispersal ability provides information on theextent of reproductive isolation, and comparison of different character clines allows identificationof characters affected by selection. In this study, we investigated the position and width of threesecondary contact zones among old evolutionary lineages of the common vole (Microtus arvalis).Contact zones are expected to be broader for paternal than for maternal markers given male baseddispersal in the common vole and neutral diffusion. Maximum likelihood cline fitting analyses detectedin all transects a shift of paternal relative to maternal clines. All transects displayed a completelack of one of the two potential male hybrid classes. One of the paternal lineages occurred almostexclusively on the maternal background of the same lineage. Contact zones were generally verynarrow, but in contrast to the neutral expectation paternal clines were significantly narrower or atmost equal in width to maternal clines. These patterns suggest partial reproductive isolation betweenthese old evolutionary lineages and strong sex-specific selection against particular hybrids. Potentialmechanisms include lineage-specific assortative mating mediated through female choice or cytogeneticincompatibilities associated with an unusual manifestation of Haldane’s rule in a mammal.O EB.21 (Mo) - ENMolecular phylogeny of Andean Eois moths – implications for the evolution of wingpatterns and host plant usePatrick Strutzenberger 1 , Gunnar Brehm 2 , Florian Bodner 1 , Manuela Zimmermann 1 , Martin Wiemers1 , Konrad Fiedler 11Department of Population Ecology, University of Vienna, Austria; 2 Institut für Spezielle Zoologieund Evolutionsbiologie mit Phyletischem Museum, Friedrich-Schiller-Universität JenaThe genus Eois (Geometridae: Larentiinae) comprises an important part of a megadiverse assemblageof moths in the mountain rainforests of southern Ecuador. We aim to elucidate phylogenetictrajectories of wing-pattern evolution and of the relationships with larval food plants in the genusPiper. Elongation factor 1-alpha sequences and cytochrome oxidase subunit I sequences of at least70 Eois species were acquired, amounting to a combined sequence dataset of ~2200 bp. Maximumparsimony and Bayesian inference of phylogeny were employed to estimate relationships withinEois. Phylogenetic trees reveal that most wing-pattern types represented in our sample evolved butonce. The only exception to this rule occurs in the most basal clade whose species closely resemblethose in a clade higher up in the tree. This may represent an ancestral character state or the result ofconvergent evolution. Species known to feed on Piper are spread over most of the major clades withinEois, suggesting that the trophic relationship with Piper is a trait found all over the neotropicalmembers of the genus and not just in certain subclades. Within the Larentiinae, Eois has traditionallybeen placed close to the Eupitheciini. However, our analyses failed to recover a stable associationwith Eupithecia or any other included outgroup taxon.