culling

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culling

(kul'ing)
1. The process of removal of abnormal or damaged blood cells from the circulation by the spleen.
2. In public health, slaughtering herds of potentially infected animals, to prevent the spread of diseases like avian influenza or mad cow disease to humans.
See: pitting; spleen

culling

removal of inferior animals from a group of breeding stock. The removal is premature, i.e. before completion of its life span, disposal of an animal from a herd or other group. In farm animals this means disposal because of their being superfluous to the needs of the group to maintain its size. Animals may be culled because of age, either because thay are too old or because they are very young and their retention would necessitate culling an older, more desirable animal. Animals may also be culled because of disease, failure to produce or reproduce, because of inherited defects or because of undesirable conformation or breed type. There are two general classes of culls, involuntary culls, e.g. deaths, and voluntary culls, e.g. age culls.

biological culling
culling of animals on the biological grounds of incapacity to pass a productivity test.
culling program
a set of rules for a manager to follow in carrying out culling within a herd.
culling rate
the number of animals culled as a proportion of the number of animals from which the culling was done.
References in periodicals archive ?
Native animal culling is used to refer to kangaroo culling, with the term kangaroo considered in its broadest sense to cover the group of large macropodid marsupials including red kangaroos, grey kangaroos and euros/wallaroos.
He remained in the Australian navy until his retirement at the age of 55 in 1956, after which he turned his hand to crayfish fishing and kangaroo culling.
1997) Kangaroo culling, harvesting and farming in South Australia--an ecological approach.
Rheya Linden of animal protest group Animal Active told Kyodo News that her group has called for a moratorium on all kangaroo culling plans so that environmental investigations can determine the exact nature of the problem on the base, and the best solution.