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Comparison of boars and castrates for bacon production 2. Composition of muscle and subcutaneous fat, and changes in side weight during curing

Published online by Cambridge University Press:  02 September 2010

J. D. Wood  and
M. Enser
J. D. Wood
Affiliation:
ARC Meat Research Institute, Longford, Bristol BS18 7DY
M. Enser
Affiliation:
ARC Meat Research Institute, Longford, Bristol BS18 7DY
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Abstract

Sixty-four commercial hybrid male pigs given different levels of feeding between 27 and 87 kg live weight were used to determine whether quality differences between boars and castrates, when used for bacon production, are true castration effects or due to the greater leanness of boars. At the same carcass composition as castrates, boars had: a higher proportion of water in m. longissimus; a higher proportion of water and lower proportion of lipid in both layers of backfat at last rib; and slightly lower curing gain as the result of a greater loss of tissue water during curing. A separate study on the composition of backfat in lighter weight pigs also revealed a higher proportion of water and lower proportion of lipid in boar backfat compared with that of castrates or gilts, and in both studies a higher proportion of fat-free dry matter in boar backfat indicated greater synthesis of connective tissue protein. Subjective assessment of backfat firmness and whiteness revealed no important castration effects that were independent of carcass composition. The leanest group of boars (average 12 mm P2) had the lowest score for firmness. Fatty acid composition of outer and inner backfat layers was determined more by the rate of fat deposition than by castration.

Type
Research Article
Information
Animal Production , Volume 35 , Issue 1 , August 1982 , pp. 65 - 74
Copyright
Copyright © British Society of Animal Science 1982

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References

REFERENCES

Ellis, N. R. and Isbell, H. S. 1926. Soft pork studies. 2. The influence of the character of the ration upon the composition of the body fat of hogs. J. biol. Chem. 69: 219–238.CrossRefGoogle Scholar
Ellis, M., Smith, W. C., Clark, J. B. K. and Innes, N. 1980. A comparison of boars, gilts and castrates for bacon manufacture. Anim. Prod. 30: 465 (Abstr.).Google Scholar
Johns, A. T. 1941. The influence of sex upon the composition of the fat of the pig. N.Z. Jl Sci. Technol. 22A: 248–257.Google Scholar
Lawrie, R. A. 1979. Meat Science. 3rd ed.Pergamon Press, Oxford.Google Scholar
Malmfors, Birgitta, Lundström, Kerstin and Hansson, Ingemar. 1978. Fatty acid composition of porcine back fat and muscle lipids as affected by sex, weight and anatomical location. Swed. J. Agric. Res. 8: 25–38.Google Scholar
Prost, E. K. 1980. Influence of animal factors on the composition and nutritive value of pork. Proc. 26th Eur. Meat Res. Wkrs Conf., Vol. 1, pp. 278–280.Google Scholar
Walstra, P. 1980. Growth and carcass composition from birth to maturity in relation to feeding level and sex in Dutch Landrace pigs. Meded. LandbHogesch. Wageningen, 80-4.Google Scholar
Whittemore, C. T. 1976. A study of growth responses to nutrient inputs by modelling. Proc. Nutr. Soc. 35: 383–391.CrossRefGoogle ScholarPubMed
Whittemore, C. T. and Fawcett, R. H. 1976. Theoretical aspects of a flexible model to simulate protein and lipid growth in pigs. Anim. Prod. 22: 87–96.Google Scholar
Wood, J. D., Enser, M. B., MacFie, H. J. H., Smith, W. G., Chadwick, J. P. and Ellis, M. 1978. Fatty acid composition of backfat in Large White pigs selected for low backfat thickness. Meat Sci. 2: 289–300.Google Scholar
Wood, J. D., Lodge, G. A. and Lister, D. 1979. Response to different rates of energy intake by Gloucester Old Spot and Large White boars and gilts given the same total feed allowance. Anim. Prod. 28: 371–380.Google Scholar
Wood, J. D. and Riley, J. E. 1982. Comparison of boars and castrates for bacon production. 1. Growth data, and carcass and joint composition. Anim. Prod. 35: 55–63.Google Scholar