Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-05T17:01:44.353Z Has data issue: false hasContentIssue false
  • English
  • Français

Fat distribution in steer carcasses of different breeds and crosses. 2. Distribution between joints

Published online by Cambridge University Press:  02 September 2010

A. J. Kempster ,
P. R. D. Avis  and
R. J. Smith
A. J. Kempster
Affiliation:
Meat and Livestock Commission, P.O. Box 44, Queensway House, Bletchley, Milton Keynes MK2 2EF
P. R. D. Avis
Affiliation:
Meat and Livestock Commission, P.O. Box 44, Queensway House, Bletchley, Milton Keynes MK2 2EF
R. J. Smith
Affiliation:
Meat and Livestock Commission, P.O. Box 44, Queensway House, Bletchley, Milton Keynes MK2 2EF
Get access

Summary

Dissection data for 643 steer carcasses of 15 breed-type × feeding system groups were used to examine the distribution of intermuscular fat (IF) and subcutaneous fat (SF) depots between standardized commercial joints.

The increase in weight of IF and SF in each joint relative to the corresponding depot weight in the side was examined using the allometric equation. Pooled within-group growth coefficients for both IF and SF were lowest in the distal limb joints increasing inwards to the joints of the rib and loin regions. They were highest for the thin flank joint.

Group means for weight of IF and SF in each joint were adjusted to equal total IF and SF weight respectively using the pooled growth coefficients. Statistically significant but relatively unimportant differences were recorded between groups in the adjusted means for all joints tested. The largest differences occurred for the top piece and were 0·39 and 0·40 kg (in one side) for IF and SF respectively. The stability of regression equations between groups for predicting the percentages of IF and SF in the side from the respective percentage in each joint was also examined. Joints which gave the least precise predictions of IF (shin and leg) and SF (shin, leg and clod and sticking) had the most unstable prediction equations. The equations for the other joints differed little between groups.

Type
Research Article
Information
Animal Production , Volume 23 , Issue 2 , October 1976 , pp. 223 - 232
Copyright
Copyright © British Society of Animal Science 1976

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Cuthbertson, A., Harrington, G. and Smith, R. J. 1972. Tissue separation—to assess beef and lamb variation. Proc. Br. Soc. Anim. Prod. (New Series) 1: 113–122.Google Scholar
Harrington, G. and Pomeroy, R. W. 1959. The yields of wholesale cuts from carcasses of Aberdeen-Angus crosses fattened on grass and in yards. J. agric. Sci., Camb. 53: 64–67.CrossRefGoogle Scholar
Harte, F. J. and Conniffe, D. 1967. Studies on cattle of varying growth potential for beef production. II. Carcass composition and distribution of ‘lean meat’, fat and bone. Ir. J. agric. Res. 6: 153–170.Google Scholar
Joubert, D. M. 1959. The influence of age on the body conformation and carcass composition of cattle. S. Afr. J. Sci. 55: 139–145.Google Scholar
Kelly, E. P., Smith, F. H. and Bath, I. H. 1973. Performance and carcass comparison of Kerry, Shorthorn × Kerry and Friesian steers raised intensively. Ir. J. agric. Res. 12: 251–258.Google Scholar
Kempster, A. J., Cuthbertson, A. and Harrington, G. 1976. Fat distribution in steer carcasses of different breeds and crosses. 1. Distribution between depots. Anim. Prod. 23: 25–34.Google Scholar
Luitingh, H. C. 1962. Developmental changes in beef steers as influenced by fattening, age and type of ration. J. agric. Sci., Camb. 58: 1–47.CrossRefGoogle Scholar
Meat and Livestock Commission. 1975. Progress on beef carcass classification. Marketing and Meat Trade Technical Bulletin No. 22. Meat and Livestock Commission, Bletchley, Bucks.Google Scholar
Seebeck, R. M. 1973. The effect of body-weight loss on the composition of Brahman cross and Africander cross steers. II. Dissected components of the dressed carcass. J. agric. Sci., Camb. 80: 411–423.CrossRefGoogle Scholar
Seebeck, R. M. and Tulloh, N. M. 1968. Developmental growth and body weight loss of cattle. II. Dissected components of the commercially dressed and jointed carcass. Aust. J. agric. Res. 19: 477–495.CrossRefGoogle Scholar
Tayler, J. C., Rudman, J. E. and Kemp, C. D. 1961. Relationships between certain carcass measurements, weights of wholesale joints and sample joint composition of Hereford cross-bred steers. J. agric. Sci., Camb. 57: 347–353.CrossRefGoogle Scholar