Blar i forfatter "Hagen, Ørjan"

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    • Digestive tract morphology and enzyme activities of juvenile diploid and triploid Atlantic salmon (Salmo salar) fed fishmealbased diets with or without fish protein hydrolysates 

      Martinez-Llorens, Silvia; Peruzzi, Stefano; Falk-Petersen, Inger Britt; Godoy-Olmos, Sergio; Ulleberg, Lars-Olav; Tomas-Vidal, Ana; Puvanendran, Velmurugu; Kwame Odei, Derrick; Hagen, Ørjan; Fernandes, Jorge Manuel de Oliveira; Jobling, Malcolm (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-11)
      Triploid, sterile Atlantic salmon (Salmo salar) could make a contribution to the development of the farming industry, but uncertainties about the performance and welfare of triploids have limited their adoption by farmers. In this study, we compared the ontogeny of digestive tract morphology and enzyme activities (pepsin, trypsin, chymotrypsin, alkaline phosphatase and aminopeptidase) of diploid ...

    • Growth and development of skeletal anomalies in diploid and triploid Atlantic salmon (Salmo salar) fed phosphorus-rich diets with fish meal and hydrolyzed fish protein 

      Peruzzi, Stefano; Puvanendran, Velmurugu; Riesen, Guido; Ripman Seim, Rudi; Hagen, Ørjan; Martínez-Llorens, Silvia; Falk-Petersen, Inger-Britt; Fernandes, Jorge Manuel de Oliveira; Jobling, Malcolm (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-22)
      Diploid and triploid Atlantic salmon, <i>Salmo salar</i> were fed high-protein, phosphorus-rich diets (56–60% protein; ca 18g phosphorus kg<sup>-1</sup> diet) whilst being reared at low temperature from start-feeding until parr-smolt transformation. Performances of salmon fed diets based on fish meal (STD) or a mix of fishmeal and hydrolysed fish proteins (HFM) as the major protein sources were ...

    • Growth and Gut Morphology of Diploid and Triploid Juvenile Atlantic Cod (Gadus morhua) 

      Vargas, Cecilia; Hagen, Ørjan; Solberg, Christel; Jobling, Malcolm; Peruzzi, Stefano (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      The objective of this paper was to compare the growth and gut morphology of juvenile diploid and triploid Atlantic cod (Gadus morhua) reared under similar conditions. Individually tagged 36-week old diploid (mean weight 49.3 ± 13.8 g) and triploid (mean weight 43.6 ± 11.2) juvenile cod were measured at intervals during a 29-weeks growth trial. Data for weight, length, condition factor (K), hepato-somatic ...

    • Growth and muscle cellularity of diploid and triploid Atlantic cod (Gadus morhua Linnaeus, 1758) larvae 

      Vargas, Cecilia; Peruzzi, Stefano; Hagen, Ørjan (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-05-26)
      The aim of this study was to compare somatic growth and muscle fibre development in diploid and triploid siblings of Atlantic cod (Gadus morhua Linnaeus, 1758) during the larval stage. Newly hatched larvae were transferred into 200-L tanks, three tanks per ploidy group (70 larvae L−1, continuous light, gradually increasing seawater temperature 7–11°C and flow rates 50–117 L h−1). Larvae were fed ...

    • Gut morphology of diploid and triploid Atlantic salmon (Salmo salar L.) 

      Peruzzi, Stefano; Hagen, Ørjan; Jobling, Malcolm (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      Triploid fish may differ from diploids in a number of morphological and physiological characteristics. The present study was undertaken to examine the effects of ploidy on the gut morphology of Atlantic salmon post-smolts (Salmo salar L.). For this purpose, we compared the intestinal length (relative gut length, RGL), pyloric caeca number and mass of commercially produced diploid and triploid siblings. ...

    • Muscle growth of triploid Atlantic cod juveniles (Gadus morhua) 

      Vargas, Cecilia Campos; Peruzzi, Stefano; Palihawadana, Anjana; Ottesen, Oddvar; Hagen, Ørjan (Journal article; Tidsskriftartikkel; Peer reviewed, 2015)
      This study has investigated the muscle growth of diploid and triploid Atlantic cod (Gadus morhua) juveniles raised in replicate tanks over a period of 29 weeks and analysed at three sampling points (February, June and September). Data for weight, length, condition factor (K), muscle fibre growth and myogenic progenitor cells (MPCs) number were collected and results were analysed in relation ...

    • Transcriptome sequencing and histology reveal dosage compensation in the liver of triploid pre-smolt Atlantic salmon 

      Odei, Derrick Kwame; Hagen, Ørjan; Peruzzi, Stefano; Falk-Petersen, Inger-Britt; Fernandes, Jorge Manuel de Oliveira (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-08)
      Triploid Atlantic salmon (<i>Salmo salar</i> L.) is seen as one of the best solutions to solve key issues in the salmon farming industry, such as the impact of escapees on wild stocks and pre-harvest sexual maturation. However, the effects of triploidy on salmon smoltification are poorly understood at the molecular level, even though smoltification is a very sensitive period that has a major influence ...