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Three chicken breeds, including one commercial broiler (CB) and others from the Norwegian gene bank (Barred Plymouth Rock and Jaerhøn) differing in body size were raised under intensive ( ad libitum feeding) and extensive (restricted feeding) systems from 7 to 20 weeks. Body weight (every...
Genotype by environment interaction for production and fertility was studied by use of a reaction norm model. Milk recording data, comprising 927 929 records, were analysed to predict reaction norms for young bulls of the Nordic Red dairy breeds. Random regressions were estimated for each bull,...
Turnout to pasture involves considerable changes in the feed intake and metabolism of dairy cows. The aim of this study was to investigate how these changes affect milk production and milk fat composition, in cows selected for high (HFI) or low (LFI) milk fat content producing the same yield of...
Glucose metabolism was measured during two consecutive years, 4 weeks postpartum, in a total of 36 yearling female mink, fitted with jugular vein catheters and raising litters of six to seven kits. The dams were fed ad libitum from parturition on diets with different ratios of metabolizable...
Patrolling with livestock guard dogs in mountain rangelands in Norway was evaluated as a method to prevent predation in areas with widely dispersed sheep. In contrast to guard dogs, patrol dogs are more socially bonded to people and follow a range inspector around. Range inspection was performed...
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