Scientist (PhD)

Irja Sunde Roiha

Irja Sunde Roiha ×

Scientist in seafood microbiology at the section of contaminants and biohazards.

Subject area
Selected publications
Projects
Scientific publications

Seafood microbiology, food safety, teaching at laboratory courses, quality assurance of microbiological methods and implementation of new methodology.

Qualifish: The Norwegian white fish industry is based on the harvest of marine resources and is characterised by the seasonal variations in amounts of landings throughout the year. This is especially the case regarding the large fisheries of cod, with a short four-month commercial season, from mid-January to mid-April. During this period, the large volumes of fish caught at the same time leads to production capacity problems in the land-based industry regarding landing and processing. A major challenge of the industry is that while most of the whitefish is caught and processed during the winter; both national and international markets demand stable all-year deliveries of high-quality and safe cod products. Through technological development of equipment in the fishing fleet and in the land-based factories, the challenge goal is to guarantee a stable delivery of fish products. The technology involves gentle and effective loading of catch, and the correct methods of freezing/thawing to retain a best possible quality. In this project, NIFES contributes with competence and analytical capacity within seafood microbiology, for the documentation of how the new technology affects the seafood quality.

The primary objective of the project is to develop necessary knowledge and a flexible technology to increase profitability and sustainability throughout the value chain of cod production in Norway, enabling actors to meet market demands for safe products with high quality and at sufficient volumes all year around. In this project, NIFES aims to contribute with competence in seafood microbiology and analytical capacity throughout the value chain of cod production. This includes activities both on-board fishing vessels and in land-based factories.


Roiha, Irja Sunde. Bioencapsulation of florfenicol in Artemia franciscana and Brachionus plicatilis for treatment of bacterial diseases of Atlantic cod (Gadus morhua) and Atlantic halibut (Hippoglossus hippoglossus) larvae.: University of Bergen 2011 (ISBN 978-82-308-1713-1)

Roiha, Irja Sunde; Samuelsen, Ole Bent; Harboe, Torstein. Efficacy of florfenicol in the treatment of bacterial infections in halibut, Hippoglossus hippoglossus (L.), larvae. Journal of Fish Diseases 2011; Volum 34 (12) pp. 927-930

Roiha, Irja Sunde; Otterlei, Erling; Samuelsen, Ole Bent. Evaluating bioencapsulation of florfenicol in rotifers (Brachionus plicatilis). Aquaculture Research 2011; Volum 42 (8) pp. 1110-1116

Roiha, Irja Sunde; Otterlei, Erling; Litlabø, Amund; Samuelsen, Ole Bent. Uptake and elimination of florfenicol in Atlantic cod (Gadus morhua) larvae delivered orally through bioencapsulation in the brine shrimp Artemia franciscana. Aquaculture 2010; Volum 310 (1-2) pp. 27-31

Roiha, Irja Sunde; Otterlei, Erling; Samuelsen, Ole Bent. Bioencapsulation of florfenicol in brine shrimp, Artemia franciscana, nauplii. Bioanalysis & Biomedicine 2010; Volum 2 (3) pp. 60-64

Roiha, Irja Sunde. Enrichment, isolation, and phylogenetic characterisation of hydrocarbon-degrading bacteria from oil-contaminated tundra. Bergen: Universitetet i Bergen 2005 104 pages.

  • 2015


    Cecilie Smith Svanevik, Irja Sunde Roiha, Arne Levsen, Bjørn Tore Lunestad

    Microbiological assessment along the fish production chain of the Norwegian pelagic fisheries sector - Results from a spot sampling programme

    Food microbiology (Print); Volum 51. S. 144-153
    • År: 2015

    Bjørn Tore Lunestad, Sylvia Frantzen, Cecilie Smith Svanevik, Irja Sunde Roiha, Arne Duinker

    Time trends in the prevalence of Escherichia coli and enterococci in bivalves harvested in Norway during 2007-2012

    Food Control; Volum 60. S. 289-295
    • År: 2015
  • 2011


    Irja Sunde Roiha, Ole Bent Samuelsen, Torstein Harboe

    Efficacy of florfenicol in the treatment of bacterial infections in halibut, Hippoglossus hippoglossus (L.), larvae

    Journal of Fish Diseases; Volum 34.(12) S. 927-930
    • År: 2011

    Irja Sunde Roiha, Erling Otterlei, Ole Bent Samuelsen

    Evaluating bioencapsulation of florfenicol in rotifers (Brachionus plicatilis)

    Aquaculture Research; Volum 42.(8) S. 1110-1116
    • År: 2011
  • 2010


    Irja Sunde Roiha, Erling Otterlei, Amund Litlabø, Ole Bent Samuelsen

    Uptake and elimination of florfenicol in Atlantic cod (Gadus morhua) larvae delivered orally through bioencapsulation in the brine shrimp Artemia franciscana

    Aquaculture; Volum 310.(1-2) S. 27-31
    • År: 2010

    Irja Sunde Roiha, Erling Otterlei, Ole Bent Samuelsen

    Bioencapsulation of florfenicol in brine shrimp, Artemia franciscana, nauplii.

    Bioanalysis & Biomedicine; Volum 2.(3) S. 60-64
    • År: 2010

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