S
Sigmund Sperstad
Researcher at Norwegian College of Fishery Science
Publications - 23
Citations - 2168
Sigmund Sperstad is an academic researcher from Norwegian College of Fishery Science. The author has contributed to research in topics: Antimicrobial peptides & Fish meal. The author has an hindex of 17, co-authored 22 publications receiving 1847 citations. Previous affiliations of Sigmund Sperstad include University of Kiel & University of Tromsø.
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Journal ArticleDOI
Effect of dietary components on the gut microbiota of aquatic animals. A never‐ending story?
Einar Ringø,Zhigang Zhou,Jose L. González Vecino,Simon Wadsworth,Jaime Romero,Åshild Krogdahl,Rolf Erik Olsen,Arkadios Dimitroglou,Andrew D. Foey,Simon J. Davies,Matthew A.G. Owen,Hélène L. Lauzon,L.L. Martinsen,P. De Schryver,Peter Bossier,Sigmund Sperstad,Daniel L. Merrifield +16 more
TL;DR: The effect of dietary components on the gut microbiota is important to investigate, as the gastrointestinal tract has been suggested as one of the major routes of infection in fish.
Journal ArticleDOI
Characterisation of the microbiota associated with intestine of Atlantic cod (Gadus morhua L.): The effect of fish meal, standard soybean meal and a bioprocessed soybean meal
TL;DR: The results showed that gut microbiota were affected by dietary manipulation, and several “new” bacterial species isolated from the alimentary tract of Atlantic cod were identified, suggesting that the GI tract microbiota of fish might not be as simple as believed.
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Effects of dietary soyabean meal, inulin and oxytetracycline on intestinal microbiota and epithelial cell stress, apoptosis and proliferation in the teleost Atlantic salmon (Salmo salar L.).
A.M. Bakke-McKellep,Michael H. Penn,Patricia Mora Salas,Ståle Refstie,Sigmund Sperstad,Thor Landsverk,Einar Ringø,Åshild Krogdahl +7 more
TL;DR: Soyabean meal-induced enteritis is accompanied by induction of distal intestinal epithelial cell protective responses and changes in microbiota, indicating induction of cellular repair and apoptosis in SBM-fed fish.
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Culturable autochthonous gut bacteria in Atlantic salmon (Salmo salar L.) fed diets with or without chitin. Characterization by 16S rRNA gene sequencing, ability to produce enzymes and in vitro growth inhibition of four fish pathogens
TL;DR: The most promising gut bacteria isolated in the present study with respect to enzyme production and in vitro growth inhibition showed high similarity to Bacillus thuringiensis by 16S rRNA gene sequencing.
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The effect of dietary inulin on aerobic bacteria associated with hindgut of Arctic charr (Salvelinus alpinus L.)
TL;DR: Electron microscopical analysis of hindgut regions confirmed traditional culture-based microbial analysis as fewer bacterial cells were observed between microvilli and associated with the surfaces of enterocytes of fish fed inulin rather than dextrin.