Immunocastration in cattle and pigs

Bonneau, Michel; Enright, W. J.

doi:10.1016/0301-6226(95)00020-l

Cited by 62 publications

(27 citation statements)

References 35 publications

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“…The vaccine contains a modified form of GnRF and animals are vaccinated twice during the growing and fattening period, 4 weeks apart. The interval between the second immunisation and slaughter needs to be optimal to ensure the production improvements associated with intact males are maintained in vaccinated animals (Bonneau and Enright, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Immunocastration with Improvac™ reduces aggressive and sexual behaviours in male pigs

Brewster¹,

Nevel²

2013

Applied Animal Behaviour Science

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Section: Introductionmentioning

confidence: 99%

“…Taste tests identified the meat as being acceptable and indistinguishable from that of meat from intact males and females . Immunocastration offers an opportunity to achieve all the benefits of intact males with regard to carcass quality and performance whilst reducing the levels of boar taint (Bonneau and Enright, 1995).…”

Section: Introductionmentioning

confidence: 99%

Immunocastration with Improvac™ reduces aggressive and sexual behaviours in male pigs

Brewster¹,

Nevel²

2013

Applied Animal Behaviour Science

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“…Surgical castration may result in regulations or barriers on world's meat trading. As a more welfarefriendly alternative to surgical castration, immunization against gonadotropin releasing hormone (GnRH) has been used in various animals to suppress testicular function and avoid boar taint (Bonneau and Enright, 1995 Recent studies have indicated that there was no difference in meat quality between the immunocastrates and females, entire males, or surgical castrates, and immunocastration produced an acceptable pork to consumers and was indistinguishable from pork from surgical castrates or females (Font i Furnols et al, 2008; Gispert et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

The Effects of Immunocastration on Meat Quality and Sensory Properties of Pork Bellies

Jeong¹,

Choi²,

Choi³

et al. 2011

Korean Journal for Food Science of Animal Resources

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This study was conducted to assess meat quality and sensory properties of pork bellies from immunocastrated males (IC) compared to meat from surgically castrated males (SC), intact males (IM), and females (FE). Pork bellies from IC had significantly higher pH values than meat from either SC or FE. Pork bellies from IC showed lower CIE L* values than those from SC, but were redder (higher CIE a* values) than meat from SC or FE. However, no differences in visual color were observed between pork bellies from IC and SC pigs using National Pork Producer Council scales. Water holding capacity was higher in SC and FE than that in IC. IC showed no significant difference in cooking loss and shear force values compared with those of SC. Both SC and IC had improved fat content when compared to that in IM, and IC meat showed a similar fat content to that of FE. Pork bellies from IC showed higher ratings for all visual evaluation traits than those of SC and were the same as meat from FE. Boar odor was not significantly different among the treatments. IC was rated similar to SC for taste, tenderness, and overall acceptability.

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“…Literature also indicates that meat, but also fat thickness of immunocastrates is higher compared with boars, resulting in a similar or lower estimated lean meat percentage and higher intramuscular fat (IMF) content compared with boars (Pauly et al, 2012;Aluwé et al, 2015). Considering these differences in performance results between entire male pigs, immunocastrates, and surgically castrated male pigs, it can be expected that an optimal timing of V2 can improve production results as has been suggested in other studies (Bonneau and Enright, 1995;Dunshea et al, 2013). Recently, some studies have been performed to evaluate the effect of time post second injection by varying slaughter age and thereby also weight, while age at V2 was similar (Dunshea et al, 2008;Skrlep et al, 2012).…”

Section: Introductionmentioning

confidence: 83%

Immunocastrated male pigs: effect of 4 v. 6 weeks time post second injection on performance, carcass quality and meat quality

Aluwé

Degezelle

Depuydt

et al. 2016

animal

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Immunocastration or vaccination against boar taint can be used as alternative for surgical castration of male piglets. The vaccine is administrated twice. After the second vaccination (V2), the pigs behave like barrows instead of boars and their feed intake increases which may result in a lower lean meat percentage. The timing of V2 is therefore crucial to find the right balance between the advantages of entire males and barrows. In this study, we evaluated the effect of time post second injection within the advised time frame (4 v. 6 weeks before slaughter) on behaviour, performance, carcass and meat quality of immunocastrated male pigs. In total, 180 animals (hybrid sow × Piétrain): 60 gilts, 60 male pigs vaccinated 6 weeks before slaughter (IM-6) and 60 male pigs vaccinated 4 weeks before slaughter (IM-4), all slaughtered at comparable slaughter weights. After 20 weeks of age, IM-6 showed more inactive behaviour at the expense of playing and aggressive behaviour. Daily feed intake (DFI), daily gain (DG) and feed conversion ratio (FCR) did not differ significantly between IM-6 and IM-4. Gilts had a lower DFI and DG in the late finishing phase and a higher FCR overall compared with both IM groups. Gilts showed a higher lean meat content compared with both IM groups. Earlier vaccination increased dressing percentage, which could partly be explained by the lower weight of the gastrointestinal tract, but not by testes weight. Meat quality traits and palatability did not differ significantly between IM-6 and IM-4. Vaccination of immunocastrates at 6 compared with 4 weeks before slaughter improved the calmness in the stable and the dressing percentage, while maintaining performance and carcass characteristics.

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Immunocastration in cattle and pigs

Cited by 62 publications

References 35 publications

Immunocastration with Improvac™ reduces aggressive and sexual behaviours in male pigs

Immunocastration with Improvac™ reduces aggressive and sexual behaviours in male pigs

The Effects of Immunocastration on Meat Quality and Sensory Properties of Pork Bellies

Immunocastrated male pigs: effect of 4 v. 6 weeks time post second injection on performance, carcass quality and meat quality

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