As seen with the H5N2 experiment, contact ducks did not shed detectable virus until at least one day after inoculated ducks began shedding, as would be expected in cases of transmission (Table 1).
On day 0 of each experiment, four ducks were removed from the barnyard room, placed in a separate room, and inoculated orally, intranasally and ocularly with 106 PFU/0.5 ml of the respective virus.
This work was performed under the governmental authorizations 67 99 and 67 285 delivered by the Préfecture du Bas-Rhin (Strasbourg, France) to conduct experiments on ducks and was approved by the Direction Départementale des Services Vétérinaires du Bas-Rhin (Strasbourg, France).
As far as we know no full analyses of the direct and correlated effects of long-term selection experiments in ducks have been published.
After experimenting with duck and goose eggs, Hambrick says ostrich eggs have become her preferred canvas, due to their size and durability.
As a child, for a fifth-grade science project, in the basement of his house he'd tried to reproduce Konrad Lorenz's imprinting experiment with baby ducks.
In Experiment 2, all duck lines had increased bone mineralisation as they grew older (P < 0.001); however, for the mallard, bone mineralisation increased until 5 weeks of age and then decreased from 7 weeks of age (P < 0.001).
Ducks in Experiment 3 were provided with two nest boxes, one of which contained the egg laid the previous day.
Ducks in Experiment 2 were reared with either open-top (OP, N = 12) or closed-top (CL, N = 12) boxes.
Ducks in Experiment 1 were provided with nest box access prior to the onset of lay (20 weeks of age, EXP group, N = 12) or at the time of preference testing (35 weeks of age, DELAYED-EXP group, N = 12).
