Collecting Gestation Length
Gestation length information is used to calculate Gestation Length EBVs within the TransTasman Angus Cattle Evaluation (TACE).
TACE will calculate Gestation Length EBVs based on the joining and birth records for calves conceived by either artificial insemination (AI) or hand mating.
- Gestation length information should only be submitted for calves conceived by either AI or hand mating. Hand mating refers to situations where the female is given limited exposure to a bull (e.g. in a yard), mating occurs, and then the bull is removed.
- No information from natural paddock matings is used in the calculation of Gestation Length EBVs. Although some natural matings may be observed, they are not currently used in the calculation of gestation length as there is no guarantee that the observed mating is the one that successfully results in the conception of the calf.
- Gestation length information should be recorded for all calves conceived via AI or hand mating in a calf drop. Only submitting gestation length information for a subset of calves is of no value and may result in biased Gestation Length EBVs.
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Angus Australia acknowledges the funds provided by the Australian Government through the Meat & Livestock Australia Donor Company (MDC).
This resource was created as a result of a collaboration between Angus Australia and Meat & Livestock Australia Donor Company (MDC) (Project P.PSH.1063).
