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View article: Spawning manipulation, broodfish diet feeding and egg production in farmed Atlantic salmon
Spawning manipulation, broodfish diet feeding and egg production in farmed Atlantic salmon Open
Atlantic salmon aquaculture relies on continuous supply of high quality eggs. Broodfish nutrition and manipulation of ovulation time (photoperiod and temperature) are key factors. The optimum feeding period with broodfish diet has not been…
View article: Effect of spawning induced starvation on nutrient loss in males of the annual spawner Atlantic halibut (Hippoglossus hippoglossus)
Effect of spawning induced starvation on nutrient loss in males of the annual spawner Atlantic halibut (Hippoglossus hippoglossus) Open
Atlantic halibut go through a period with reduced or no feed intake during their spawning period. This study with male Atlantic halibut aimed to assess the effect of a two-month starvation period corresponding to the naturally occurring sp…
View article: Welfare and performance of ballan wrasse (<i>Labrus bergylta</i>) reared at two different temperatures after a preparatory feeding trial with enhanced dietary eicosapentaenoic acid
Welfare and performance of ballan wrasse (<i>Labrus bergylta</i>) reared at two different temperatures after a preparatory feeding trial with enhanced dietary eicosapentaenoic acid Open
Concerns have long been raised about the welfare of ballan wrasse ( Labrus bergylta ) used for the biological control of sea lice in Atlantic salmon ( Salmo salar ) aquaculture. This study assessed the effect of increased dietary eicosapen…
View article: Development of genomic markers associated to production traits in lumpfish (<i>Cyclopterus lumpus</i>)
Development of genomic markers associated to production traits in lumpfish (<i>Cyclopterus lumpus</i>) Open
Cleaner fish species have gained great importance in the control of sea lice, among them, lumpfish ( Cyclopterus lumpus ) has become one of the most popular. Lumpfish life cycle has been closed, and hatchery reproduction is now possible, h…
View article: Effects of chilled storage and cryopreservation of sperm, and sperm to egg ratio on fertilization success in lumpfish (Cyclopterus lumpus)
Effects of chilled storage and cryopreservation of sperm, and sperm to egg ratio on fertilization success in lumpfish (Cyclopterus lumpus) Open
Lumpfish males usually release small amounts of milt and are therefore often sacrificed for surgical harvesting of gonads. To optimize the utilization of sperm obtained by dissection of the gonads, a series of small-scale fertilization exp…
View article: Soya saponins and prebiotics alter intestinal functions in Ballan wrasse (<i>Labrus bergylta</i>)
Soya saponins and prebiotics alter intestinal functions in Ballan wrasse (<i>Labrus bergylta</i>) Open
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, Ballan wrasse…
View article: Effects of dietary lipid level on growth, digestive physiology and disease resistance in lumpfish (Cyclopterus lumpus)
Effects of dietary lipid level on growth, digestive physiology and disease resistance in lumpfish (Cyclopterus lumpus) Open
Lumpfish (Cyclopterus lumpus) aquaculture has expanded greatly in recent years due to demands for sea lice cleanerfish from the salmon industry. There are knowledge gaps in lumpfish digestive physiology, nutrient requirement and implicatio…
View article: A Screening Study on Effects Varying Dietary Macronutrient Composition on Gut Functions in Lumpfish (Cyclopterus lumpus)
A Screening Study on Effects Varying Dietary Macronutrient Composition on Gut Functions in Lumpfish (Cyclopterus lumpus) Open
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 optimize diet for…
View article: Ova lipid profiling and egg quality in wild and captive lumpfish, Cyclopterus lumpus (Linnaeus, 1758)
Ova lipid profiling and egg quality in wild and captive lumpfish, Cyclopterus lumpus (Linnaeus, 1758) Open
Lumpfish (Cyclopterus lumpus) serves an important role as cleaner fish for removing salmon lice in salmon aquaculture. For this use, cultivated lumpfish are preferred over wild-caught fish to avoid overexploitation of natural stocks and pr…
View article: Optimization of the Balance between Protein, Lipid and Carbohydrate in Diets for Lumpfish (Cyclopterus lumpus)
Optimization of the Balance between Protein, Lipid and Carbohydrate in Diets for Lumpfish (Cyclopterus lumpus) Open
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 15-50 g. A three-c…
View article: Technical feed quality influences health, digestion patterns, body mineralization and bone development in farming of the stomachless cleaner fish ballan wrasse (Labrus bergylta)
Technical feed quality influences health, digestion patterns, body mineralization and bone development in farming of the stomachless cleaner fish ballan wrasse (Labrus bergylta) Open
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 risk of overfishin…
View article: Intestinal Function of the Stomachless Fish, Ballan Wrasse (Labrus bergylta)
Intestinal Function of the Stomachless Fish, Ballan Wrasse (Labrus bergylta) Open
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) fed either dry …
View article: Family differences on triploid induction, sexual maturation and its contribution to sea cage performance of Atlantic cod, Gadus morhua
Family differences on triploid induction, sexual maturation and its contribution to sea cage performance of Atlantic cod, Gadus morhua Open
Early maturation has been one of the biological bottlenecks of commercializing Atlantic cod culture. To overcome the bottleneck, production of sterile fish through triploidy and other molecular techniques have been suggested and attempted.…
View article: RENSVEL OWI FACT SHEET SERIES: An introduction to Operational and Laboratory-based Welfare Indicators for lumpfish (Cyclopterus lumpus L.)
RENSVEL OWI FACT SHEET SERIES: An introduction to Operational and Laboratory-based Welfare Indicators for lumpfish (Cyclopterus lumpus L.) Open
Fish welfare, defined by Stien et al., (2013) as the “quality of life as perceived by the animals themselves” requires various tools to assess and evaluate it (see e.g. Noble et al., 2018). These tools are termed Welfare Indicators (WIs) a…
View article: Ontogeny of the Digestive System of Atlantic Salmon (Salmo salar L.) and Effects of Soybean Meal from Start-Feeding
Ontogeny of the Digestive System of Atlantic Salmon (Salmo salar L.) and Effects of Soybean Meal from Start-Feeding Open
Despite a long history of rearing Atlantic salmon in hatcheries in Norway, knowledge of molecular and physiological aspects of juvenile development is still limited. To facilitate introduction of alternative feed ingredients and feed addit…