EurekaMag.com logo
+ Site Statistics
References:
53,517,315
Abstracts:
29,339,501
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

A model of individual variation in the food conversion efficiency and other growth parameters of grazing beef cattle in the tropics



A model of individual variation in the food conversion efficiency and other growth parameters of grazing beef cattle in the tropics



Australian Journal of Agricultural Research 39(5): 943-958



Methods to genetically improve gross food efficiency (GFE) in cattle usually rely on a high genetic correlation between GFE and growth rate. Estimating this genetic correlation for cattle grazing tropical pastures is extremely difficult, so a model of individual variation in growth has been developed based on component traits which are known to affect growth rate. The model assumes that there is individual variations in mature size, maintenance requirements, intake to maintenance ratio, and susceptibility to heat stress and to tick and worm infestation. Nutritional level is assumed to interact with maintenance requirement, so that under good nutrition a high level of maintenance requirement maximises growth rate, whereas under a low level of nutrition a low maintenance requirement leads to maximum growth rate. The model predicts that in the presence of environmental stress the correlation between growth rate and mature size is only about 0.5, and there is no correlation between mature size and GFE. Gowth rate and GFE are correlated with resistance to parasite and heat stress and to intake:maintenance ratio. Consequently growth rate and GFE are highly correlated, especially under stressful environmental conditions. The model predicts that growth rate in one environment will be highly genetically correlated with growth rate in other similar environments.

(PDF 0-2 workdays service: $29.90)

Accession: 001738674

Download citation: RISBibTeXText



Related references

Cereal straw in diets for beef cattle effects of pattern of growth and diet formulation on growth rate and food conversion efficiency. Animal Production 45(1): 29-36, 1987

Multibreed comparisons of british cattle variation in relative growth rate relative food intake and food conversion efficiency. Animal Production 41(2): 193-200, 1985

Model studies on the dynamics of food and protein conversion during intensive growth of animals 1. influence of the protein level and food intake on the efficiency of food conversion for growth and maintenance requirement of rats. Roczniki Nauk Rolniczych Seria B Zootechniczna 100(2): 23-46, 1980

Production levels of liver fluke in cattle. i. the effects of infection on liveweight gain, feed intake and food conversion efficiency in beef cattle. British veterinary journal: 133 (2) 145-159, 1977

Production effects of liver fluke in cattle. I. The effects of infection on liveweight gain, feed intake and food conversion efficiency in beef cattle. British Veterinary Journal 133(2): 145-159, 1977

Production effects of liver fluke in cattle part 1 the effects of infection on live weight gain feed intake and food conversion efficiency in beef cattle. British Veterinary Journal 133(2): 145-159, 1977

The effect of different planes of nutrition during rearing on growth, reproduction and production of beef cattle. I. Growth and feed conversion efficiency from 1 to 16 months of age. Bulletin of the Kyushu Agricultural Experiment Station 19(4): 405-423, 1978

Individual heterosis for post weaning growth efficiency in beef cattle. Journal of Animal Science 46(6): 1529-1538, 1978

Studies on cattle of varying growth potential for beef production. 1. Growth rate, feed conversion efficiency, carcass yield and offals. Irish J. Agric. Res, 6: 137-152, 1967

Variation in food intake, food conversion efficiency and growth of juvenile turbot from different geographic strains. Journal of Fish Biology ust; 59(2): 449-454, 2001

Seasonal variation of cattle daily gain, plant characteristics and solar energy conversion efficiency in grazing pastures of Dactylis glomerata and of Festuca arundinacea. Proceedings of the XVI International Grassland Congress, 4-11 October 1989, Nice, France: 1113-1114, 1989

The effect of supplementary barley upon growth and efficiency of food conversion in calves kept at high grazing intensity. Journal of the British Grassland Society. 27: 1, 7-11, 1972

Use of ivermectin in young, grazing beef cattle in the tropics. Revue de Medecine Veterinaire 135(3): 131-134, 1984

Individual and maternal heterosis for post-weaning growth, feed conversion and carcass composition in beef cattle. Dissertation Abstracts International, B 38(1): 2-3, 1976