Sökning: "litter size in pigs"
Hittade 3 avhandlingar innehållade orden litter size in pigs.
1. Genetic Heteroscedasticity for Domestic Animal Traits
Sammanfattning : Animal traits differ not only in mean, but also in variation around the mean. For instance, one sire’s daughter group may be very homogeneous, while another sire’s daughters are much more heterogeneous in performance. The difference in residual variance can partially be explained by genetic differences. LÄS MER
2. Genetic and clinical studies of teat traits in the pig
Sammanfattning : A major goal of pig breeding is to produce sows with good longevity, which can raise many uniform litters with healthy, fast-growing piglets. The fitness of the sow, including the presence of sufficient number of functional teats, is one key to the success of the initial rearing period of the piglets. LÄS MER
3. Forage legumes as feed for pigs in smallholder production systems in the North of Lao PDR : production systems, forage biomass yield and protein nutrition
Sammanfattning : This thesis sought to characterise and understand existing smallholder pig production systems in the North of Lao PDR and to investigate the role of forage legumes as alternative protein sources for pigs in smallholder production systems. A survey found that there were three main pig rearing systems, free-scavenging, semi-scavenging and confinement (enclosures and pens), in the study areas. LÄS MER