Modelled female sale options demonstrate improved profitability in northern beef herds

Niethe, G.; Holmes, W.

doi:10.1111/j.1751-0813.2008.00366.x

Cited by 9 publications

(9 citation statements)

References 3 publications

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“…In addition, the live export trade with south‐east Asia has a strict requirement of non‐pregnant females. It has been recently demonstrated that there can be significant economic returns to cattle producers from spaying surplus females 2 …”

mentioning

confidence: 99%

“…It has been recently demonstrated that there can be significant economic returns to cattle producers from spaying surplus females. 2 Currently in northern Australia, because of the difficulty in controlling bulls and with many herds being continuously mated, the only method of reliably and permanently preventing pregnancy is surgical spaying. Until the mid-1990s the most common method of spaying cattle in northern Australia was via a flank incision through the abdominal wall.…”

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confidence: 99%

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Morbidity, mortality and body weight gain of surgically spayed, yearling Brahman heifers

McCosker¹,

Letchford²,

Petherick³

et al. 2010

Aust Veterinary J

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confidence: 99%

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confidence: 99%

Morbidity, mortality and body weight gain of surgically spayed, yearling Brahman heifers

McCosker¹,

Letchford²,

Petherick³

et al. 2010

Aust Veterinary J

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“…Management and marketing options for large and extensively managed beef cattle stations in northern Australia are very different from those in the south in terms of season, nutrition, geography, management and genetic factors, including the increased numbers of Bos indicus cattle. This study examined the impact of a variety of management factors on the profitability of breeding properties using modelling with Bcowplus software 1 . Breeder herd performances and production parameters including prices, costs and herd structure, were collected from properties in six beef‐producing regions in northern Australia, all of which spay females to enhance their marketing options.…”

Section: Production Animalsmentioning

confidence: 99%

In this issue

Jackson¹

2008

Aust Veterinary J

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Modelled female sale options demonstrate improved profitability in northern beef herds Maximising profits from a beef breeder herd is complex. Management and marketing options for large and extensively managed beef cattle stations in northern Australia are very different from those in the south in terms of season, nutrition, geography, management and genetic factors, including the increased numbers of Bos indicus cattle. This study examined the impact of a variety of management factors on the profitability of breeding properties using modelling with Bcowplus software. 1 Breeder herd performances and production parameters including prices, costs and herd structure, were collected from properties in six beef-producing regions in northern Australia, all of which spay females to enhance their marketing options. The data were entered into a herd simulation software model and alternative management strategies were modelled to compare current market prices and most likely herd outcomes.

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“…The sale of surplus to requirement cows, "culled cows", is an important contributor to the overall profit of northern Australia beef breeding businesses, with the sale of cull cows contributing up to 50% of the total income (Niethe & Holmes 2008). In northern Australian beef enterprises, cows are typically culled from the herd for two reasons: unproductive and culled for age.…”

Section: Introductionmentioning

confidence: 99%

“…However, cull cows often present at muster in poor body condition (i.e. low body weight, body condition score, and carcass quality) and are difficult to market for slaughter (Roeber et al 2001;Niethe & Holmes 2008). The value of cull cows is improved by realimenting cows through feed supplementation and intensive feeding to meet higher market values (Holmer et al 2009;Moreno et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Improving the Efficiency of Rumen Function: When to Intervene

Negara¹

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Rumen microbial development and adaptation are essential in ruminal feed digestion. Many studies have been undertaken to improve ruminal fermentation by modulating the profile of the rumen microbial community i.e. using biological and dietary treatments. However, the result of trying to modulate the rumen microbial community has often been inconsistent. Previous studies have indicated that host specificity influences the rumen microbiome resulting in variation between animals. However, the core rumen microbial community across animals, even with different diets and from differing geographical locations, tends to be similar demonstrating a resilience of the core microbiome against interruptive events. Thus, information related to these characteristics is important for the design and formulation of treatments for modulating the rumen microbiome to enable interventions to persist in the long term.In this study, the changes to the rumen microbial community were investigated during rumen perturbation at three different time frames, i.e. pre-ruminant, post-weaning, and adult. The treatments consisted of probiotic administered to young calves (Chapter 3), feed supplementation of post-weaned cattle (Chapter 4), and movement and change of feed in adult cows (Chapter 5). The plasticity of the core rumen microbiome was investigated when cattle were moved onto a higher quality floodplain pasture-based diet (Chapter 5).Results tend to suggest that the rumen microbial community was less significantly impacted in pre-weaning animals compared to post-weaning and adult animals. Bacillus amylolyquefaciens strain H57, used as a probiotic, was inoculated into four-day old dairy calves (22 in total) through milk replacer for eight weeks. Although populations of Prevotella and Shuttleworthia increased in the core rumen microbiome, the overall rumen microbial diversity was not affected by H57 inoculation.Addition of H57 also increased the predicted functional genes for peptide metabolism in the core rumen microbial community. However, the results also suggested that H57 may have failed to establish in the rumen of dairy calves, as indicated by a low number of H57 in the rumen of treated calves. The low number of H57 in the rumen might be caused by the oesophageal groove mechanism bypassing milk replacer containing H57 into the lower GI tract rather than to the rumen.Recently weaned beef cattle heifers were fed a low-quality hay (38 g/kg DM of CP) and supplemented with copra meal and corn or no supplement as control (Chapter 4). The results showed that the rumen microbial diversity and predicted functional genes of the core rumen microbiome were significantly affected by feed supplementation. Feed supplementation reduced the diversity and species richness of the rumen microbial community. In both non-core and core microbiome data sets, feed supplementation significantly increased the relative abundance of Christensenellaceae R-7 group, Ruminococcus, Ruminococcaceae UCG-014, and Lachnospiraceae XPB1014. The predicted "A journey of a thou...

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Modelled female sale options demonstrate improved profitability in northern beef herds

Cited by 9 publications

References 3 publications

Morbidity, mortality and body weight gain of surgically spayed, yearling Brahman heifers

Morbidity, mortality and body weight gain of surgically spayed, yearling Brahman heifers

In this issue

Improving the Efficiency of Rumen Function: When to Intervene

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