Nearly 50% of the shoreline is dominated by the calving ice fronts of the large outlet glaciers.
R 271 samples were taken at calving, and 8 samples were taken from quarters that entered the population after purchase of animals.
The effect of infections at calving on production in the subsequent lactation was not examined.
An interaction between season of calving and nutrition on the resumption of ovarian cycles in post-partum beef cattle.
For subclinical or clinical infections that were first detected at calving, the calving date was assumed to be the date of onset of infection.
Individuals entered the lactating herd after purchase or at calving, and left the lactating herd at dry-off or culling.
Similarly, calving difficulty whose determinants can be variable was not taken into account in the model.
An indicator of length of calving season was measured by the date by which approximately 75 % of calves were born.
