Hardy Manser | PhD Candidate
Faculty of Veterinary Science
The University of Sydney NSW 2006
M +61 405 900 917
BSc(Biol) UWS MAgRuDev UWS GradDipEd(sec) CSU
Contribution to the profession and the community
- Member of the Royal Institution
- Member of the Australian Institute of Agriculture and Technology
- Member of the Australian Institute of Biology
- Student member of the Australian Veterinary Association, and various SIG’s
It is well known that excess mobilization of body reserves or negative energy balance (NEB), resulting from the energetic demands of milk production in early lactation, is associated with a decline in reproductive performance. To achieve a 12 months intercalving period, the modern dairy cow is often inseminated during NEB. Several studies are investigating the several links between NEB and fertility but the exact pathways by which NEB influences reproduction is still not fully elucidated. Recent studies are indicating that the interactions between gametes and the oviduct might have a crucial role in determining the fate of the sperms, oocytes and the embryos.
The aim of this project is to investigate if peri-conceptional nutritional stress has an effect on progeny performance. We will examine the reproductive and productive performances of dairy cows in relation to the date of mating/insemination of their respective dams. We hypothesize that dams that conceived during early lactation give birth to progeny characterized by lower productive and reproductive performances compared to progeny born from dams that fell pregnant during mid or late lactation. We will also look at the incidence of diseases.
This project will provide a deeper understanding of the mechanisms by which maternal nutrition influences progeny performances. This will allow us to develop and improve alternative nutrition and feeding systems for dairy cows.