Jan Josef Olli

NOFIMA Norwegian Institute of Food, Fisheries and Aquaculture Research | NOFIMA

Two fish oils, varying in origin, species and catching season, were decontaminated in a commercial scale short-path distillation equipment, aided by a working fluid (distilled ethyl esters of marine fatty acids). The processing conditions for the two oils varied by different processing temperature and pressure in the distillation column. The concen...

Atlantic salmon were fed diets with fish oil, either normal (control group) or cleansed for persistent organic pollutants (POPs) as the sole lipid source from smolt stage to harvest size. The POPs were removed using short-path distillation, aided by a working fluid, and were highly efficiently removed resulting in low dietary levels. Each diet was...

A commercially available soybean molasses (alcohol extract from soybean meal) was included at levels of 0. 5,10,15 and 20% in a fish meal based diet for Atlantic salmon, Salmo salar L., weighing about 75 g. These inclusion levels supplied dietary alcohol soluble components corresponding to levels that would have been obtained if a standard soybean...

Consumptive coagulopathy was induced within 4 h in Atlantic salmon, Salmo salar L., by injecting purified serine protease from Aeromonas salmonicida into the dorsal aorta. Pretreatment with a bolus intravascular injection of (human) antithrombin (AT) or (bovine) 2-macroglobulin (2M) just prior to injection of the protease alleviated the in vivo pro...

Bacterial protein meal (BPM) produced on natural gas was evaluated with respect to growth, survival, body composition and histopathological indices in Atlantic salmon during the freshwater stage. In the diets, experimentally produced bacterial protein accounted for 0%, 6.25%, 12.5%, 25% and 50% of total dietary amino acids gradually replacing high-...

This study investigated how partial dietary replacement of fish meal (FM) by a novel fish protein hydrolysate (FPH) affected feed intake, growth, feed efficiency, nutrient retention, and nutrient digestibility by Atlantic salmon in the early seawater stage. FM was replaced by FPH in increments, producing four extruded diets containing 0%, 5%, 10%,...

Atlantic salmon (average weight: 199 g, group size: 55) and rainbow trout (average weight: 565 g, group size: 25) of the same age, kept in freshwater (FW) or full-strength seawater (SW), were fed diets containing 7% (LCH) or 23% (HCH) precooked maize starch, replacing dietary protein. The fish were fed ad libitum in triplicate groups. Feed intake w...

Fifteen experimental diets with five levels of medium chain triglycerides (MCT) (0, 39, 78, 117 and 156 g kg−1) and three levels of cysteine supplementations (0.0, 2.5 and 5.0 g kg−1) were fed ad libitum to Atlantic salmon (mean weight at start 846 g) in sea water for 71 days. Nutrient digestibilities and protein retention improved significantly wi...

Atlantic salmon with an average initial weight of 180 g were fed either a control diet containing 25% fish oil or a diet with 15% fish oil and 10% of an oil based on medium-chain fatty acid triglycerides (MCTs). The fish were kept in tanks supplied with saltwater for 65 days. The fish group with the lowest feed intake determined feeding level in th...

Atlantic salmon, kept in seawater (8–11°C), initial weight 180 g, were pair-fed four high energy, low protein diets for 65 days in triplicate. The diets were supplemented isonitrogenously with amino acids: methionine (6.2 g kg−1), cysteine (5.0 g kg−1) or alanine (3.7 g kg−1) (control). In the fourth diet, also supplemented with alanine, medium cha...

Willow ptarmigan Lagopus l. lagopus is a popular game bird which fluctuates in abundance. The causes of these fluctuations, however, remain controversial, but several studies have emphasised the effect of predation. Predation not only reduces the number of breeding birds, but does it in such a way that genetic variation among chicks at hatching bec...

Two cold-pelleted diets containing either 36.9 or 35.4 mg kg−1 of predominantly all-E-astaxanthin (97% of total astaxanthin) or a mixture of all-E- and Z-astaxanthin (64 and 36%, respectively), were fed to duplicate groups of rainbow trout (Oncorhynchus mykiss) in freshwater (initial weight 0.4 kg) for 69 days. Average final weight was ca. 1.0 kg f...

Standard soybean meal, heat treated to differing degrees and containing varying levels of soybean lectin and trypsin inhibitor, was used to study the effect of soybean-containing diets on the morphology of the distal intestine in Atlantic salmon, Salmo salar L. A reference diet based on fish meal and a fish meal diet mixed with an alcohol extract o...

Diets, containing dehulled, solvent-extracted soybean meal in amounts corresponding to 0. 20 and 40% soybean protein of total protein, were fed for 10 months to duplicate groups of Atlantic salmon, Salmo salar L., weighing about 900 g, held in sea water. Fish fed the diet containing 20% soybean protein grew as well as fish fed the diet with high-qu...

Atlantic salmon (Salmo salar, L), 180 g, were fed diets containing a crude trypsin inhibitor from soybean at five levels. The five levels resulted in trypsin inhibitor activities (TIA) corresponding to an inclusion of 0 to about 100% commercial soybean meal. Digestibility of protein and fat, weight gain and trypsin activity in intestinal content we...

Several soybean products were evaluated as protein sources for rainbow trout reared in fresh water: solvent-extracted soybean meal (SBM44), dehulled and solvent-extracted soybean meal (SBM50), dehulled full-fat soybean meal (FFSBM) and soybean concentrate (SBC). The soybean products replaced high-quality fish meal at levels corresponding to 0, 14,...

Four processed soybean products were evaluated as protein sources for Atlantic salmon: solvent-extracted soybean meal (SBM44), dehulled and solvent-extracted soybean meal (SBM50), dehulled full-fat soybean meal (FFSBM) and soybean concentrate (SBC). The soybean products replaced high-quality fish meal at levels corresponding to 0, 14, 28, 42 and 56...

Rainbow trout (Oncorhynchus mykiss), 265 g kept in fresh water, 1 m2 surface area tanks, 10 kg per tank were fed diets based on high quality fish meal added 0.00, 0.37, 0.74, 1.11 and 1.48% soybean proteinase inhibitors, and chromic oxide as internal marker. After 10 days, 10 fish were dissected to obtain total contents of intestinal segments, and...

The morphology of the proximal and distal intestine of Atlantic salmon (Salmo salar) was studied after prolonged feeding with diets containing full-fat soybean meal (FFSB) or soybean protein concentrate (SBPC) and compared with fish fed a standard herring meal (HM) diet. To avoid possible changes due to decreased food intake, dietary inclusions of...

To test for possible toxicity of soybean lectin for salmon, the location of soybean agglutinin binding sites in the small intestinal brush border membranes (BBM) was determined quantitatively by an enzyme-linked lectin sorbent assay (ELLSA). The assay revealed substantial binding in both the proximal (Bmax 1764±170 nM per mg BBM protein; Kd 2.16±0....