N. Batorek 1, M. Č andek-Potokar 1, M. Škrlep 1, M. Bonneau 3 1 Agricultural Institute of Slovenia, Hacquetova ulica 17, 1000 Ljubljana, Slovenia 3 INRA,

N. Batorek1, M. Čandek-Potokar1, M. Škrlep1, M. Bonneau3

1Agricultural Institute of Slovenia, Hacquetova ulica 17, 1000 Ljubljana, Slovenia3INRA, UMR 1079 SENAH, 35590 Saint Gilles, France; Agrocampus-Ouest, UMR 1079 SENAH,

35042 Rennes, France

AIM OF THE STUDY

Effect of restricted feed intake (after V2) in immunocastrates /comparison to ad libitum fed boars

and surgical castrates/on

• performance• carcass traits• meat quality

• 88 pigs - LN×LW×PI

• 4 treatment groups

• individual housing• ad libitum feeding: SC, EM, IC_L, • IC_R restricted feed intake (80% of SC)

MATERIAL AND METHODS - 1

• SC, n=22 • EM, n=24 • IC_L, n=21 • IC_R, n=21

Traits of interest: • DG, FI, FCR • carcass traits• meat quality traits Immunocastration

effectivness:• boar taint compounds (A, S), • reproductive organs

Ante-mortem stress:• carcass lesions

MATERIAL AND METHODS - 2

REPRODUCTIVE ORGANS & BOAR TAINT COMPOUNDSVaccination was successful (no non-responders) size of reproductive organs level of boar taint compounds

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PERFORMANCE

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ANTE MORTEM STRESS/AGRESSION Carcass lesions

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IC fatter than EM, leaner than SC; IC_R closer to EM, IC_L closer to SC

FAT DEPOTSVisceral

Subcutaneous

Intermuscular

Intramuscular

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• no differences between IC_L and IC_R • IC intermediate between EM and SC, which differed significantly.

MEAT QUALITY

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Conclusion

Results of this study suggest some benefits in terms of performance and carcass quality, when feed restriction is applied to IC after the active immunisation.

Acknowledgement: study was performed in collaboration with pig producer Panvita d.d. and financially supported by the Slovenian Research Agency (program P4-0072; PhD grant). Rennes Metropole scholarship of Nina Batorek is also acknowledged.

Hvala za pozornostThank you for your

attention