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Journal of the Australian Rangeland Society
RESEARCH ARTICLE

Calf loss in northern Australia: a systematic review

Anita Z. Chang https://orcid.org/0000-0002-9371-068X A B , David L. Swain A and Mark G. Trotter A
+ Author Affiliations
- Author Affiliations

A Institute for Future Farming Systems, School of Health, Medical and Applied Sciences, Central Queensland University, Rockhampton North, Qld 4701, Australia.

B Corresponding author. Email: a.chang@cqu.edu.au

The Rangeland Journal 42(1) 9-26 https://doi.org/10.1071/RJ19049
Submitted: 4 July 2019  Accepted: 21 January 2020   Published: 27 February 2020

Abstract

Calf mortality is a key issue for the north Australian beef industry; however, the sector faces several challenges that preclude the detection and reduction of calf mortality rates. A systematic literature review methodology was employed to explore scientific literature describing the scope of calf loss in northern Australia. Online databases were used to locate articles reporting on beef calf mortality rates within the north Australian region. Articles (n = 43) consisting of 668 beef cattle cohorts were retrieved that reported calf mortality between 1936 and 2014. Of these, 13 different observation periods were identified. Most cohorts (n = 201) examined mortality between the pregnancy to weaning period, whereas only 20 cohorts in four studies were located that investigated calf mortality in the perinatal and postnatal periods. A broad seasonal and regional influence was identified, however, the dilution of the datasets due to the high number of timeline variations, prevented robust statistical analysis and the further examination of influential factors, such as breed. The results of the systematic literature review indicate that the resolution of the data available does not allow for producers or researchers to accurately target the occurrence or cause of calf mortality. Experimental protocols for future research pertaining to reproductive efficiency and calf loss in northern Australia should be standardised. Consistency in reporting factors and periods must first occur for robust statistical analyses to be achieved.

Additional keywords: beef cow, calf mortality, reproductive wastage.


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