Browsing Brage IMR by Author "Sæle, Øystein"
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A novel system to quantify intestinal lipid digestion and transport
Sæle, Øystein; Rød, Kari Elin Langeland; Quinlivan, Vanessa H; Li, Shengrong; Farber, Steven A (Journal article; Peer reviewed, 2018)The zebrafish larva is a powerful tool for the study of dietary triglyceride (TG) digestion and how fatty acids (FA) derived from dietary lipids are absorbed, metabolized and distributed to the body. While fluorescent FA ... -
A single meal containing phytosterols does not affect the uptake or tissue distribution of cholesterol in zebrafish (Danio rerio)
van Spankeren, Michel; Sibinga, Nathaniel; Reinshol, Øyvind Hagerup; Torstensen, Bente Elisabeth; Sæle, Øystein; Liland, Nina Sylvia (Journal article; Peer reviewed, 2019)Increased plant oil inclusion in aquaculture feeds has led to higher dietary phytosterol concentrations and speculation about whether this affects the metabolism and health of the fish. The mechanisms of cholesterol ... -
Developmental stages of the ballan wrasse from first feeding through metamorphosis: Cranial ossification and the digestive system
Norland, Sissel; Sæle, Øystein; Rønnestad, Ivar (Peer reviewed; Journal article, 2022)We have described six developmental stages for the ballan wrasse, from the first feeding until the juvenile stage, supported by specific descriptions of cranial ossification, maturation of the digestive tract, and ... -
Dietary Lipid Modulation of Intestinal Serotonin in Ballan Wrasse (Labrus bergylta)—In Vitro Analyses
Etayo, Angela; Le, Hoang Thi My Dung; Araujo, Pedro; Lie, Kai Kristoffer; Sæle, Øystein (Peer reviewed; Journal article, 2021)Serotonin (5-HT) is pivotal in the complex regulation of gut motility and consequent digestion of nutrients via multiple receptors. We investigated the serotonergic system in an agastric fish species, the ballan wrasse ... -
Effect of dietary electrolyte balance on the interplay between water fluxes and digestive functioning along the gastrointestinal tract of freshwater rainbow trout (Oncorhynchus mykiss)
Ciavoni, Elisa; Maas, Roel M.; Koppelaars, Marc; Sæle, Øystein; Schrama, Johan W.; Prabhu, P. Antony Jesu (Peer reviewed; Journal article, 2023)Aquaculture feed formulation is shifting from fish meal and fish oil toward other ingredients, such as plant-based ingredients, which lead to different levels and forms of minerals in diets. Dietary minerals are essential ... -
Effects of cholecystokinin (CCK) on gut motility in the stomachless fish ballan wrasse (Labrus bergylta)
Le, Hoang Thi My Dung; Lie, Kai Kristoffer; Giroud-Argoud, Justine; Rønnestad, Ivar; Sæle, Øystein (Journal article; Peer reviewed, 2019)Cholecystokinin (CCK) is well-known as a key hormone that inhibits stomach emptying and stimulates midgut motility in gastric species. However, the function of CCK related to gut motility in agastric fish, especially in ... -
Ernæringsbehov og fôring for optimal helse og overlevelse av rensefisk - Del 2 Rognkjeks
Lein, Ingrid; Berge, Gerd Marit; Bogevik, André Sture; Hamre, Kristin; Aas, Grete Hansen; Kortner, Trond M.; Kousoulaki, Katerina; Krogdahl, Åshild; Remø, Sofie C.; Sæle, Øystein (Nofima rapportserie, Research report, 2021)Rognkjeks har et velutviklet tarmsystem, men pH i magen faller først ved 1,0-1,5 gram. Rognkjeksen bør derfor tilbys agglomerert eller kaldekstrudert fôr fram til denne størrelsen. Fôr med 55 % protein, 17 % fett og 6 % ... -
Intestinal function of the stomachless fish, ballan wrasse (Labrus bergylta)
Le, Hoang Thi My Dung; Shao, Xinting; Krogdahl, Åshild; Kortner, Trond Moxness; Lein, Ingrid; Kousoulaki, Katerina; Lie, Kai Kristoffer; Sæle, Øystein (Journal article; Peer reviewed, 2019)Little is known about the digestion of nutrients in stomachless (agastric) fishes with short intestines, such as wrasse. This study describes the digestion, absorption and evacuation rates in ballan wrasse (Labrus bergylta) ... -
Intracellular trafficking of fatty acids in the fish intestinal epithelial cell line RTgutGC
Selvam, Chandrasekar; Saito, Takaya; Sissener, Nini; Prabhu, P. Antony Jesu; Sæle, Øystein (Peer reviewed; Journal article, 2022)The shift towards higher inclusion of vegetable oils (VOs) in aquafeeds has resulted in major changes in dietary fatty acid composition, especially increased amounts of monounsaturated fatty acids (MUFAs) and decreased ... -
Iodine nutrition and toxicity in Atlantic cod (Gadus morhua) larvae
Penglase, Samuel; Harboe, Torstein; Sæle, Øystein; Helland, Synnøve; Nordgreen, Andreas Hoel; Hamre, Kristin (Journal article; Peer reviewed, 2013-02-19)Copepods as feed promote better growth and development in marine fish larvae than rotifers. However, unlike rotifers, copepods contain several minerals such as iodine (I), at potentially toxic levels. Iodine is an essential ... -
Loss of stomach, loss of appetite? Sequencing of the ballan wrasse (Labrus bergylta) genome and intestinal transcriptomic profiling illuminate the evolution of loss of stomach function in fish
Lie, Kai Kristoffer; Tørresen, Ole K.; Solbakken, Monica Hongrø; Rønnestad, Ivar; Tooming-Klunderud, Ave; Nederbragt, Alexander Johan; Jentoft, Sissel; Sæle, Øystein (Journal article; Peer reviewed, 2018)The ballan wrasse (Labrus bergylta) belongs to a large teleost family containing more than 600 species showing several unique evolutionary traits such as lack of stomach and hermaphroditism. Agastric fish are found throughout ... -
Optimization of the Balance between Protein, Lipid and Carbohydrate in Diets for Lumpfish (Cyclopterus lumpus)
Hamre, Kristin; Berge, Gerd Marit; Sæle, Øystein; Holen, Elisabeth; Kousoulaki, Katerina; Remø, Sofie Charlotte; Krogdahl, Åshild; Lein, Ingrid (Peer reviewed; Journal article, 2022)The aim of this study was to investigate how the dietary balance between protein, lipid, and carbohydrate affects growth, welfare, and health with focus on immune responses, in lumpfish of body weight ranges 1.7-10 g and ... -
Ossification of Atlantic cod (Gadus morhua) – Developmental stages revisited
Sæle, Øystein; Haugen, Trine; Karlsen, Ørjan; van der Meeren, Terje; Bæverfjord, Grete; Hamre, Kristin; Rønnestad, Ivar; Moren, Mari; Lie, Kai Kristoffer (Peer reviewed; Journal article, 2017)In studies of marine larvae, it is common to use days post-hatch as a developmental reference point. We show that age is a poor measure of morphological and physiological development in Atlantic cod. Therefore, we propose ... -
Ossification of Atlantic cod (Gadus morhua) – Developmental stages revisited
Sæle, Øystein; Haugen, Trine; Karlsen, Ørjan; van der Meeren, Terje; Bæverfjord, Grete; Hamre, Kristin; Rønnestad, Ivar; Moren, Mari; Lie, Kai Kristoffer (Peer reviewed; Journal article, 2017)In studies of marine larvae, it is common to use days post-hatch as a developmental reference point. We show that age is a poor measure of morphological and physiological development in Atlantic cod. Therefore, we propose ... -
Physical and nutrient stimuli differentially modulate gut motility patterns, gut transit rate, and transcriptome in an agastric fish, the ballan wrasse
Le, Hoang Thi My Dung; Lie, Kai Kristoffer; Etayo, Angela; Rønnestad, Ivar; Sæle, Øystein (Peer reviewed; Journal article, 2021)The effects of nutrient and mechanical sensing on gut motility and intestinal metabolism in lower vertebrates remains largely unknown. Here we present the transcriptome response to luminal stimulation by nutrients and an ... -
A Screening Study on Effects Varying Dietary Macronutrient Composition on Gut Functions in Lumpfish (Cyclopterus lumpus)
Zhou, Weiwen; Hamre, Kristin; Chikwati, Elvis Mashingaidze; Kousoulaki, Katerina; Lein, Ingrid; Berge, Gerd Marit; Sæle, Øystein; Kortner, Trond M.; Krogdahl, Åshild (Peer reviewed; Journal article, 2022)Cultivation of lumpfish (Cyclopterus lumpus) as lice cleaner fish for salmon is now expanding. For successful cultivation of a new species, understanding the basic biology of digestive functions is vital to facilitate and ... -
Soya saponins and prebiotics alter intestinal functions in Ballan wrasse (Labrus bergylta)
Zhou, Weiwen; Lie, Kai Kristoffer; Chikwati, Elvis Mashingaidze; Kousoulaki, Katerina; Lein, Ingrid; Sæle, Øystein; Krogdahl, Åshild; Kortner, Trond M. (Peer reviewed; Journal article, 2023)A 5-week feeding trial was conducted in the cleaner fish Ballan wrasse (Labrus bergylta) for a better understanding of the basic biology of the intestinal functions and health in this stomach less species. During the trial, ... -
T cell receptor alpha chain genes in the teleost Ballan wrasse (Labrus bergylta) are subjected to somatic hypermutation
Bilal, Sumaira; Lie, Kai Kristoffer; Sæle, Øystein; Hordvik, Ivar (Journal article; Peer reviewed, 2018)Previously, somatic hypermutation (SHM) was considered to be exclusively associated with affinity maturation of antibodies, although it also occurred in T cells under certain conditions. More recently, it has been shown ... -
Technical feed quality influences health, digestion patterns, body mineralization and bone development in farming of the stomachless cleaner fish ballan wrasse (Labrus bergylta)
Kousoulaki, Katerina; Grøtan, Espen; Kortner, Trond M.; Berge, Gerd Marit; Haustveit, Gunhild; Krogdahl, Åshild; Nygaard, Halvor; Sæle, Øystein; Chikwati, Elvis Mashingaidze; Lein, Ingrid (Peer reviewed; Journal article, 2021)Farmed ballan wrasse (Labrus bergylta) is an efficient cleaner fish used for non-medicinal delicing of Atlantic salmon in sea cages replacing to an increasing degree wild wrasse due to considerations for biodiversity and ... -
Technical feed quality influences health, digestion patterns, body mineralization and bone development in farming of the stomachless cleaner fish ballan wrasse (Labrus bergylta)
Kousoulaki, Katerina; Grøtan, Espen; Kortner, Trond M.; Berge, Gerd Marit; Haustveit, Gunhild; Krogdahl, Åshild; Nygaard, Halvor; Sæle, Øystein; Chikwati, Elvis Mashingaidze; Lein, Ingrid (Peer reviewed; Journal article, 2021)Farmed ballan wrasse (Labrus bergylta) is an efficient cleaner fish used for non-medicinal delicing of Atlantic salmon in sea cages replacing to an increasing degree wild wrasse due to considerations for biodiversity and ...