Browsing Master’s theses (BioVit) by Author "Heringstad, Bjørg"
Now showing items 1-6 of 6
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Arvbarhet og avlsverdier for metanproduksjon hos unge okser av Norsk Rødt Fe (NRF), med målinger i GreenFeed
Hamfjord, Ida Wøyen (Master thesis, 2022)Fokuset rundt klimagasser og forurensning har økt de siste tiårene, og drøvtyggerne har blitt stemplet som miljøverstinger. Avl er en måte å redusere klimaavtrykket fra drøvtyggere, men for å kunne gjøre dette må egenskapen ... -
Comparison of production and health status of purebred Holstein and Norwegian Red x Holstein crosses in the UK
Wibe, Anne Gladsø (Master thesis, 2022)The goal of this thesis was to compare performance of purebred Holstein cows, Holstein crossed with Norwegian Red (NR) and various crossbreed combinations that included NR, by comparing their milk traits (kg. milk, fat ... -
Effekt av AH1 på dødfødsler og tidlig utrangering av kalv hos NRF
Storlien, Hanna (Master thesis, 2018)Genet AH1 ble oppdaget i 2014 på Canadisk Ayrshire og studien viste at dersom begge foreldre er bærere av AH1 kan det medføre dødfødsel. Formålet med denne studien var å undersøke om AH1 har negativ effekt på kalvingsegenskapene ... -
Investigating novel traits for pregnancy loss in Norwegian red cattle
Watson, Natasha Christina (Master thesis, 2023)The task was to identify potential traits to describe the incidence of pregnancy loss in Norwegian Red cows. To evaluate the trait, variance components and heritability were estimated. Subsequently, a genome-wide association ... -
New activity-based fertility traits for Norwegian Red dairy cattle : definitions, heritabilities and comparison to traditional fertility traits
Aglen, Johanna (Master thesis, 2019)The aim of this study was to define and calculate heritabilities for new activity-based fertility traits for Norwegian Red (NRF) dairy cattle. The traits were time from calving to first high activity episode (CFHA), first ... -
Selection for reduced methane emission in Norwegian Red cows
Qasir, Hiba (Master thesis, 2021)Over the past years, methane production from dairy cattle gained a significant attraction because of its contribution to climate change and loss of dietary energy from the animals. This the first study to compare methane ...