Robert J Kilgour

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To provide useful information on how to moderate posthandling stress, the attractiveness of different conditions to beef cattle just after release from restraint was determined. Angus heifers were individually allowed to enter a choice area after 2 min of restraint in a squeeze chute and to choose between 2 pens. After the heifer had chosen a pen, it could(More)
As part of a study of possible indirect selection criteria for the genetic improvement of lamb survival in the Australian Merino, two experiments were conducted. These experiments involved ewes from two flocks, one selected for superior lamb survival (Fertility Flock) the other an unselected flock (Random Flock). In the first experiment, the behaviour in an(More)
We determined differences in the behavior of the progeny of two major sire lines of Japanese Black cattle by recording the behavior of 35 and 70 half-sib steers of sires from fast (FG) and slow (SG) growing lines, respectively. Two sire lines of steers were mixed and allocated to nine pens with 11-12 animals per pen. The proportion of steers lying was(More)
This study observed the behavioral characteristics of 122 steers in eight pens and 1,136 steers at six pastures. Nonhuman animals kept in pens performed less nutritive oral behaviors and more nonnutritive oral behaviors than animals kept at pasture. Although these could not be described as stereotypies, they did represent a replacement of nutritive oral(More)
In the first of 2 experiments, the estrous cycles of 11 Australian feral sows were studied. In 9 of the 11 sows the cycle was characterized by cyclic occurrences of low (0 to 2 ng/ml) and high (24.2 to 47.2 ng/ml) levels of progesterone. The low levels were associated, in all sows but one, with the standing response, lasting from 1 to 4 days, to a feral(More)
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