In my research, I use different teleost models (salmonids, zebrafish, medaka, California killifish) to study neuro - and cardiovascular physiology. In short, I study various biological factors (e.g. stress, parasites, immune responsiveness, early-life experience) affecting phenotypic traits like behavior, physiology, organ plasticity, disease and the welfare of fish.
During my PhD and later postdoc research, my main research focus was related to individual variation in stress responsiveness and how that affects neuronal and cardiac plasticity in salmonid fishes. Perhaps the most important contribution to this field of research, was the identification of stress and stress hormones as important contributors to the development of cardiac disease in salmonids. In addition to my PhD and postdoc research, I have been fortunate to be involved in several projects ranging from depression-like syndromes in Atlantic salmon to anoxia-tolerance in crucian carp and metabolic dysfunction in heart failure.
Currently, salmonid cardiovascular physiology and pathology is an important research focus in my group. The salmonid heart is an extraordinarily plastic organ, well known for its ability to change (i.e. remodel) and grow in response to physiologic stimulation. Our research focuses on factors that stimulate adaptive (i.e. beneficial) and maladaptive (i.e. pathological) remodelling of the salmonid heart, with a particular focus on pathological remodelling and heart disease in farmed Atlantic salmon. To study cardiovascular physiology and pathology in salmonids we use different techniques to assess gross morphology (e.g. imaging, MRI, histology), expression of molecular disease markers (qPCR, RNAseq) and cardiac performance (in vivo recordings of heart function).
I also study interactions between pathogens and hosts and explore mechanisms behind host manipulation. I work with several parasite-host models, including California Killifish infected with the trematode Euhaplorchis Californiensis, Arctic charr infected with several parasite species and zebrafish infected with the parasitic microsporidium Pseudoloma neurophilia. To study how parasites influence host physiology and behaviour, we combine several techniques including monoamine neurochemistry, brain-region specific gene expression (i.e. qPCR and RNAseq), histology, mass spectrometry, pharmacological manipulation of neural signalling systems (e.g. receptor agonist and antagonist), hormone analysis (e.g. ELISA and RIA) and behavioural analysis (both manual and automated).