My research tends to focus on evolutionary genetics, specifically the the genetic and developmental correlates of adaptive changes and neutral modifications of populations and species undergoing evolutionary changes. For the last 13 years I have been working with Arctic charr and also recently the related Brown trout. With our colleagues at University of Iceland we have addressed questions of adaptive divergence in the sympatric morphs in Lake Thingvallavatn, using population genomics and developmental transcriptomics. Out of the large set of interconnected projects that the group works on, we have been contributing mainly to studies of the population genetics of anadromous charr in Iceland, stream charr and their connectivity with landlocked populations and relationship of plasticity and divergence. The last project involves experimental work to study the levels of developmental plasticity in Arctic charr and how this relates to trophic specializations. We are comparing developmental responses between two sympatric charr pairs, and use anadromous population as a reference group to represent the ancestral plasticity and traits. The experimental treatment was administration of pelagic vs. benthic diet, which mimics the dietary specializations of sympatric charr and diverging salmonids in many systems. We are conducting analyses of external morphology, internal feeding structures and gene expression in fish reared in this experiment. This work is done in collaborations with researchers in Canada and Iceland.