Reproductive performance of 50% Bos Indicus cattle grazing the Mitchell grasslands of north Queensland

Holroyd, R. G. and Smith, P. C. and Thompson, P. J. M. and Toleman, Mark (1988) Reproductive performance of 50% Bos Indicus cattle grazing the Mitchell grasslands of north Queensland. In: 1988 Australian Rangelands Conference, Jun 1988, Longreach, Australia.

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Abstract

[Summary]: The reproductive performance was measured in a beef breeding herd, of 50% Bos Indicus, grazing the Mitchell (Astrebla spp) grasslands of north Queensland from 1973 to 1980. The mean pregnancy rate over the eight years (1973 to 1980) was 91.4% ranging from 79.0% to 96.0%. Mean pregnancy rates and ranges for variousage groups were (i) 2 year old heifers, 93.4% (86.2 - 97.6%), (ii) wet 3 year old cows, 79.6% (41.4 - 94.4%), (iii) wet 4 year old and older cows, 92.4% (74.4 - 96.6%). Generally, dry cows had higher conception rates than wet cows. Lactation failures (cows pregnant one year but dry at the following year's pregnancy test) wer 9.3% (range 4.7 - 15.8%). Age of dam had no effect on prevalence of lactation failures. Body condition levels were dependent on seasonal conditions and the mean herd body condition varied from 4.8 (backward store-store) to 7.5 (prime-fat).


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: No evidence of copyright restrictions preventing deposit.
Depositing User: Mrs Rae Jones
Faculty / Department / School: Historic - Faculty of Business - Department of Information Systems
Date Deposited: 29 Sep 2010 00:28
Last Modified: 02 Jul 2013 23:19
Uncontrolled Keywords: reproductive performance; Bos Indicus; Mitchell grasslands
Fields of Research (FOR2008): 06 Biological Sciences > 0604 Genetics > 060412 Quantitative Genetics (incl. Disease and Trait Mapping Genetics)
07 Agricultural and Veterinary Sciences > 0702 Animal Production > 070201 Animal Breeding
07 Agricultural and Veterinary Sciences > 0702 Animal Production > 070206 Animal Reproduction
Socio-Economic Objective (SEO2008): B Economic Development > 83 Animal Production and Animal Primary Products > 8303 Livestock Raising > 830301 Beef Cattle
URI: http://eprints.usq.edu.au/id/eprint/5327

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