Longitudinal DXA measurements demonstrate lifetime differences in lean and fat tissue deposition between boars and barrows under individual and group-penned systems
D. Suster A B , B. J. Leury B , D. J. Kerton A , M. R. Borg A , K. L. Butler A and F. R. Dunshea A B CA Department of Primary Industries, 600 Sneydes Rd, Werribee, Vic. 3030, Australia.
B The University of Melbourne, Melbourne, Vic. 3010, Australia.
C Corresponding author. Email: Frank.Dunshea@dpi.vic.gov.au
Australian Journal of Agricultural Research 57(9) 1009-1015 https://doi.org/10.1071/AR04266
Submitted: 4 November 2004 Accepted: 27 April 2006 Published: 30 August 2006
Abstract
Thirty-two Large White × Landrace male pigs were used to determine the relationships between the rates of tissue deposition and age, in boars and barrows under 2 housing systems. A 2 × 2 factorial design was used, with the respective treatments being sex (boar or barrow) and housing condition (individually penned system or group-penned system). Surgical castration was performed at 7 days of age. Individually housed pigs were used to provide an estimate of potential growth and were weaned at 10 days into individual cages and provided with supplemental fermented skim milk for 2 weeks. Group-housed pigs were weaned at 24 days of age and reared in group pens of boars and castrates typical for commercial production. Conventional weaner, grower, and finisher diets were provided ad libitum to all pigs from weaning onwards. A Hologic QDR4500A dual-energy X-ray absorptiometer (DXA) was used to determine lean, fat, and bone composition at 4-weekly intervals from 10 until 150 days of age. Over the 20 weeks of the study, boars deposited less fat than barrows (136 v. 179 g/day, s.e.d. = 6.49, P < 0.001). Over the same time frame, boars deposited more lean tissue than barrows when individually penned (490 v. 444 g/day, s.e.d. = 14.4, P < 0.05) but there was no difference in group-penned pigs (464 v. 443 g/day, s.e.d. = 14.4, P > 0.1). This was more pronounced in the final 4 weeks of growth when individually penned boars deposited 200 g/day more lean than barrows (P < 0.001), with no increase in group-penned animals. However, during this growth phase, group penning further increased the fat deposition margin between boars and barrows where boars deposited 90 g/day less fat when individually penned (P < 0.001), but 140 g/day less fat (P < 0.001) when group penned. The results show that the advantages of boars in terms of growth and lean tissue composition are substantially reduced in group-penned situations. However, because of fat deposition, boars retain some advantage over barrows in group-penned systems at liveweights over about 50 kg. These data may aid in the accurate prediction of the nutrient requirements and optimum slaughter weight for barrows.
Additional keywords: pig, sex, housing, body composition, growth.
Acknowledgment
The first author thanks Australian Pork Limited (APL) for financial assistance.
Auldist DE,
Stevenson FL,
Kerr MG,
Eason P, King RH
(1997) Lysine requirements of pigs from 2 to 7 kg live weight. Animal Science 65, 501–507.
Babatunde GM,
Pond WG,
VanVleck LD,
Kroening GH, Reid JT
(1967) Effect of plane of nutrition, sex and bodyweight on the chemical composition of yorkshire pigs. Journal of Animal Science 26, 718–726.
| PubMed |
Bereskin B, Davey RJ
(1976) Breed, line, sex and diet effects and interactions in swine carcass traits. Journal of Animal Science 42, 43–51.
Bonneau M
(1982) Compounds responsible for boar taint, with special emphasis on adrostenone: a review. Livestock Production Science 9, 687–705.
| Crossref | GoogleScholarGoogle Scholar |
Brumm MC, Miller PS
(1996) Response of pigs to space allocation and diets varying in nutrient density. Journal of Animal Science 74, 2730–2737.
| PubMed |
Campbell RG, Taverner MR
(1988) Genotype and sex effects on the relationship between energy intake and protein deposition in growing pigs. Journal of Animal Science 66, 676–686.
| PubMed |
Campbell RG,
Taverner MR, Curic DM
(1985) Effects of sex and energy intake between 48 and 90 kg live weight on protein deposition in growing pigs. Animal Production 40, 497–503.
Castell AG,
Cliplef RL, McKay RM
(1985) Effects of diet, litter, and sex type on the performance (from 22 to 90 kg liveweight) and carcass measurements of crossbred pigs. Canadian Journal of Animal Science 65, 821–834.
Cronin GM,
Dunshea FR,
Butler KL,
McCauley I,
Barnett JL, Hemsworth PH
(2003) The effects of immuno-castration and surgical-castration on the behaviour and consequently growth of group-housed, male finisher pigs. Applied Animal Behaviour Science 81, 111–126.
| Crossref | GoogleScholarGoogle Scholar |
Davies AS,
Pearson G, Carr JR
(1980) The carcass composition of male, castrated male and female pigs resulting from two levels of feeding. Journal of Agricultural Science 95, 251–259.
De Haer LCM, Merks JWM
(1992) Patterns of daily food intake in growing pigs. Animal Production 54, 95–104.
De Haer LCM, de Vries AG
(1993) Feed intake patterns of and feed digestibility in growing pigs housed individually or in groups. Livestock Production Science 33, 277–292.
| Crossref | GoogleScholarGoogle Scholar |
Dunshea FR,
Colantoni C,
Howard K,
McCauley I,
Jackson P,
Long KA,
Lopaticki S,
Nugent EA,
Simons JA,
Walker J, Hennessy DP
(2001) Vaccination of boars with a GnRH vaccine (Improvac) eliminates boar taint and increases growth performance. Journal of Animal Science 79, 2524–2535.
| PubMed |
Dunshea FR,
Kerton DJ,
Eason PJ, King RH
(2000) Supplemental fermented milk increases growth performance of early-weaned pigs. Asian-Australasian Journal of Animal Sciences 13, 511–515.
Dunshea FR,
King RH,
Campbell RG,
Sainz RD, Kim YS
(1993) Interrelationships between sex and ractopamine on protein and lipid deposition in rapidly growing pigs. Journal of Animal Science 71, 2919–2930.
| PubMed |
Dunshea FR,
King RH,
Eason PJ, Campbell RG
(1998) Interrelationships between dietary ractopamine, energy intake, and sex in pigs. Australian Journal of Agricultural Research 49, 565–574.
| Crossref | GoogleScholarGoogle Scholar |
Edmonds MS, Baker DH
(2003) Effect of dietary protein fluctuations and space allocation on performance and carcass quality of growing-finishing pigs. Journal of Animal Science 81, 2783–2791.
| PubMed |
Kelly TL,
Berger N, Richardson TL
(1998) DXA body composition: theory and practice. Applied Radiation and Isotopes 49, 511–513.
| Crossref |
PubMed |
King RH,
Campbell RG,
Smits RJ,
Morley WC,
Ronnfeldt K,
Butler K, Dunshea FR
(2000) Interrelationships between dietary lysine, sex, and porcine somatotropin administration on growth performance and protein deposition in pigs between 80 and 120 kg live weight. Journal of Animal Science 78, 2639–2651.
| PubMed |
King RH,
Campbell RG,
Smits RJ,
Morley WC,
Ronnfeldt K, Dunshea FR
(2004) The influence of dietary energy intake on growth performance and protein deposition in pigs between 80 and 120 kg liveweight. Australian Journal of Agricultural Research 55, 1271–1281.
| Crossref |
Latorre MA,
Lázaro R,
Valencia DG,
Medel P, Mateos GG
(2004) The effects of gender and slaughter weight on the growth performance, carcass traits, and meat quality characteristics of heavy pigs. Journal of Animal Science 82, 526–533.
| PubMed |
McMeekan CP
(1941) Growth and development in the pig with special reference to carcass quality characters. I. Age changes in growth and development. Journal of Agricultural Science 30, 276–343.
Patterson DC
(1985) A note of the effect of individual penning on the performance of fattening pigs. Animal Production 40, 185–188.
Schmidt MK,
Veum TL,
Clark JL, Krause GF
(1973) Chemical composition of crossbred swine from birth to 136 kg with two planes of nutrition from 53 to 136 kg. Journal of Animal Science 37, 683–687.
Shields RG,
Mahan DC, Graham PL
(1983) Changes in swine body composition from birth to 145 kg. Journal of Animal Science 57, 43–54.
| PubMed |
Stant EGJ,
Martin TG,
Judge MD, Harrington RB
(1968) Physical separation and chemical analysis of the porcine carcass at 23, 46, 68 and 91 kg liveweight. Journal of Animal Science 27, 636–644.
Suster D,
Leury BJ,
Ostrowska E,
Butler KL,
Kerton DJ,
Wark JD, Dunshea FR
(2003) Accuracy of dual energy X-ray absorptiometry (DXA), weight and P2 backfat to predict whole body and carcass composition in pigs within and across experiments. Livestock Production Science 84, 231–242.
| Crossref | GoogleScholarGoogle Scholar |
Thompson JM,
Sun F,
Kuczek T,
Schinckel AP, Stewart TS
(1996) The effect of genotype and sex on the patterns of protein accretion in pigs. Animal Science 63, 265–276.
Wagner JR,
Schinckel AP,
Chen W,
Forrest JC, Coe BL
(1999) Analysis of body composition changes of swine during growth and development. Journal of Animal Science 77, 1442–1466.
| PubMed |
Whittemore CT,
Tullis JB, Emmans GC
(1988) Protein growth in pigs. Animal Production 46, 437–445.
