Gerrit Timmerhaus

Biologist with molecular biology and bioinformatics background. Now working with welfare and heart health of salmonids, using data analysis and image analysis. Strong interest in technology and development of efficient methods.

My Projects

Harnessing cross-species variation in sea lice resistance

New frontiers in salmonid biology

Monitoring and optimising the crowding of Atlantic salmon using emerging health and welfare indicators (CrowdMonitor)

Investigating Urea for Enhanced Welfare in Farmed Salmon

Novel tools and knowledge for a future with no lice infestations in Norwegian aquaculture

Adapting spectral and molecular tools to improve fish welfare assessments

Enhanced fish performance and biosecurity by manipulation of the natural microbiome of Atlantic salmon

Gene editing for CMS resistance in salmon

Predictive fish health under changing environment

Farmed animals welfare toolbox

Programming Fish for Robustness

My publications

Interplay between disinfection and the enigmatic diplomonad parasite Spironucleus salmonicida in Atlantic salmon

Intestinal morphology and host‑ and system‑associated microbiome dynamics during short‑term fasting and refeeding of Atlantic salmon in recirculating aquaculture systems

Transmission and host response of Atlantic salmon to Moritella viscosa in winter ulcer disease

Performance, skin and gut health, and fillet quality in Arctic-farmed Atlantic salmon – Effects of increased EPA + DHA and organic zinc source in feed

Salinity acclimatization enhances Atlantic salmon resistance to Tenacibaculum finnmarkense: Skin infection and host response

Welfare Indicators for Aquaculture Research: Toolboxes for Five Farmed European Fish Species

The CrowdMonitor handbook for commercial tanks v0.1: an updated welfare indicator toolbox and crowding intensity scale for measuring and monitoring Atlantic salmon welfare during crowding operations

The CrowdMonitor handbook for commercial net pens v0.1: an updated welfare indicator toolbox and crowding intensity scales for measuring and monitoring Atlantic salmon welfare during crowding operations

Dietary trace mineral (Cu, Fe, Mn, Zn, and Se) source and levels on production parameters, fillet quality, mineralization, and skin morphology of 1+ and 0+ Atlantic salmon across regions in Norway

Enhanced fish performance and biosecurity by manipulation of the natural microbiome of Atlantic salmon

Local inflammation at the salmon louse (Lepeophtheirus salmonis) attachment site contributes to copepodid rejection in coho salmon (Oncorhynchus kisutch)

Characterisation of Lumpfish (Cyclopterus lumpus L.) Skin and Development of a Digital Histomorphometric Tool to Analyse It

Regnbueørret responderer ikke som en laks under termisk behandling

Dietary trace mineral (Cu, Fe, Mn, Zn, and Se) source and levels on production parameters, fillet quality, mineralization, and skin morphology of 1+ and 0+ Atlantic salmon across regions in Norway

Effects of prolonged application of peracetic acid-based disinfectant on recirculating aquaculture systems stocked with Atlantic salmon parr

Evaluating a crowding intensity scale and welfare indicators for Atlantic salmon in sea cages

Mucosal and systemic physiological changes underscore the welfare risks of environmental hydrogen sulphide in post-smolt Atlantic salmon (Salmo salar)

Temperature acclimation and response to acute thermal stress in the adults of the snow crab Chionoecetes opilio Fabricius, 1788 (Decapoda: Brachyura: Oregoniidae)

Fast and slow releasing sulphide donors engender distinct transcriptomic alterations in Atlantic salmon hepatocytes

Climate change with increasing seawater temperature will challenge the health of farmed Atlantic Cod (Gadus morhua L.)

Regulation of the molecular repertoires of oxidative stress response in the gills and olfactory organ of Atlantic salmon following infection and treatment of the parasite Neoparameoba perurans

Recurrent oxidant treatment induces dysregulation in the brain transcriptome of Atlantic salmon (Salmo salar) smolts

Mucosal immune and stress responses of Neoparamoeba perurans-infected Atlantic salmon (Salmo salar) treated with peracetic acid shed light on the host-parasite-oxidant interactions

Crowding reshapes the mucosal but not the systemic response repertoires of Atlantic salmon to peracetic acid

Deep neural network analysis – a paradigm shift for histological examination of health and welfare of farmed fish

The optimum velocity for Atlantic salmon post-smolts in RAS is a compromise between muscle growth and fish welfare

Transcriptome Responses of Atlantic Salmon (Salmo salar L.) to Viral and Bacterial Pathogens, Inflammation, and Stress

Multiomics provide insights into the key molecules and pathways involved in the physiological adaptation of atlantic salmon (Salmo salar) to chemotherapeutic-induced oxidative stress

Responses to Mineral Supplementation and Salmon Lice (Lepeophtheirus salmonis) Infestation in Skin Layers of Atlantic Salmon (Salmo salar L.)

Performance and welfare of Atlantic salmon, Salmo salar L. post-smolts in recirculating aquaculture systems: Importance of salinity and water velocity

The Atlantic Salmon Gill Transcriptome Response in a Natural Outbreak of Salmon Gill Pox Virus Infection Reveals New Biomarkers of Gill Pathology and Suppression of Mucosal Defense

Oxidant-induced modifications in the mucosal transcriptome and circulating metabolome of Atlantic salmon

Piscine orthoreovirus-1 isolates differ in their ability to induce heart and skeletal muscle inflammation in Atlantic salmon (Salmo salar)

Morphomolecular alterations in the skin mucosa of Atlantic salmon (Salmo salar) after exposure to peracetic acid-based disinfectant

Antiviral Responses and Biological Concequences of Piscine orthoreovirus Infection in Salmonid Erythrocytes

Wound healing in post-smolt Atlantic salmon (Salmo salar L.)

Forebyggende ernæring mot lus på laks – forsøk og dokumentasjon på betydning av samvirkning mellom aktive tilsetninger og grunnfôr. Faglig delrapport

Peracetic acid as a potential treatment for amoebic gill disease (AGD) in Atlantic salmon – Stage 1

High fish density delays wound healing in Atlantic salmon (Salmo salar)

Atlantic salmon skin barrier functions gradually enhance after seawater transfer

Training the salmon’s genes: influence of aerobic exercise, swimming performance and selection on gene expression in Atlantic salmon

Hypoxia tolerance and responses to hypoxic stress during heart and skeletal muscle inflammation in Atlantic salmon (Salmo salar)

Resolving the complexity of vitellogenins and their receptors in the tetraploid Atlantic salmon (Salmo salar): Ancient origin of the phosvitin-less VtgC in chondrichthyean fishes

Short-term starvation at low temperature prior to harvest does not impact the health and acute stress response of adult Atlantic salmon

Experimental Piscine orthoreovirus infection mediates protection against pancreas disease in Atlantic salmon (Salmo salar)

Smoltification and seawater transfer of Atlantic salmon (Salmo salar L.) is associated with systemic repression of the immune transcriptome

Styrt fettsyresammensetning i fôr for å forebygge utbrudd av viktige virussykdommer i laks

Domestication compromises athleticism and respiratory plasticity in response to aerobic exercise training in Atlantic salmon (Salmo salar)

Impact of fish density and specific water flow on skin properties in Atlantic salmon (Salmo salar L.) post-smolts

Differences in gene expression in Atlantic salmon parr and smolt after challenge with Piscine orthoreovirus (PRV)

Effects of crude oil exposure and elevated temperature on the liver transcriptome of polar cod (Boreogadus saida)

Transcriptome analyses of Atlantic salmon (Salmo salar L.) erythrocytes infected with piscine orthoreovirus (PRV)

Association between swimming performance, cardiorespiratory morphometry, and thermal tolerance in Atlantic salmon (Salmo salar L.)

Cardiac responses to elevated seawater temperature in Atlantic salmon

Dietary cholesterol supplementation to a plant-based diet suppresses the complete pathway of cholesterol synthesis and induces bile acid production in Atlantic salmon (Salmo salar L.)

Induced erythropoiesis during acute anemia in Atlantic salmon: A transcriptomic survey

Genomic analysis of the host response to nervous necrosis virus in Atlantic cod (Gadus morhua) brain

Comparison of Atlantic salmon individuals with different outcomes of cardiomyopathy syndrome (CMS)

Kunnskap- og metodeutvikling for å styrke laksens robusthet og helse

Cardiomyopathy syndrome (CMS) in Atlantic salmon, Salmo salar L.: functional genomics studies of host-pathogen responses and disease markers / Kardiomyopatisyndrom (CMS) hos Atlantisk laks, Salmo salar L.: funksjonell genomikk studier av vert-patogen responser og sykdomsmarkører

Development and assessment of oligonucleotide microarrays for Atlantic salmon (Salmo salar L.)

Genomic survey of early responses to viruses in Atlantic salmon, Salmo salar L

IPNV with high and low virulence: host immune responses and viral mutations during infection