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Research r...FinishersTrial report 996

Trial report 996: Screening of entire males

Screenings of entire males from 9 herds showed a rejection rate of 2.3% when based on skatole increasing to 11% when based on human nose score. 37% had an androstenone level above 1.0 ppm.


If rejection of entire males at slaughter is based on skatole level and human nose score, rejections rates would become far too high for production of entire males to be profitable.

This screening based on entire males slaughtered from nine herds revealed an average rejection rate of 2.3% if based on skatole levels above 0.25 ppm. The percentage of entire males with a human nose score of 2 (equals boar taint) averaged 11%. When based on both skatole level and human nose score, rejection rates reached 11%. Furthermore, results showed an androstenone level above 1.00 ppm in 37% of the pigs. If rejection is based on all three criteria, rejection rates reached 38%. If the limits for both skatole level and human nose were used and the limit for androstenone was 2.00 pm, 9% would be rejected. All recordings that form the basis of these values were made in neck fat.

The percentage of entire males rejected solely on the basis of skatole (skatole level above 0.25 ppm) was low, which may be attributed to the fact that the pig producers in the trial are registered male pig producers. They have succeeded in keeping rejection rates low (measured on skatole level only) and have thereby maintained their male pig contract. Therefore, the result of this screening cannot be expected to apply to the entire population of entire males in Denmark if production of male pigs is introduced.


Updated: 27.02.2014


Hanne Maribo

Chief scientist, PhD

Tel.: +45 3339 4390