Castration and alternatives in pig: advantages and disadvantages

Abstract

Article Details: Received: 2020-07-07 | Accepted: 2020-11-05 | Available online: 2021-03-31

https://doi.org/10.15414/afz.2021.24.01.60-63

This article reviews the advantages and disadvantages of various alternatives to the surgical castration of piglets. Producers use castrations against boar taint which is present in the meat. Alternative methods could be immunocastration, production with entire male pigs or castration with anesthesia and/or analgesia. Production with entire male pigs means to feed pigs to lower carcasses, as the boar taint is very low at that time. But this method is not suitable for all especially If pigs need to be fattened up to 180-200 kg. Castration with anesthesia and analgesia reduces pain and is suitable for welfare but the cost of anesthesia and analgesia is high for some producers. The expense of immunocastration is also higher than for entire pigs but advantages of this method are higher meat percentage, better carcass quality, improved feed conversion ratio.

Keywords: castration, immunocastration, boar taint, entire male pigs, castration with anesthesia or analgesia

References

Adam, J.L. (1977). Boar odour in entire males after slaughter. Agricultural Research in the New Zealand Ministry of Agriculture and Fisheries Annual Report of the Research Division, 1976–1977.

Giffin, B. J., Allison, J. R., Martin, S., Ward, P. and Tschopp, A. (2008). Consumer acceptance of the use of vaccination to control boar taint. Proceedings 20th Int Pig Vet Soc Cong, Durban, South Africa.

Aluwé, M., Langendries, K. C. M., Bekaert, K. M., Tuyttens, F. A. M., De Brabander, D. L., De Smet, S. and Millet, S. (2013). Effect of surgical castration, immunocastration and chicory-diet on the meat quality and palatability of boars. Meat Science, 94(3), 402–407. doi: https://doi.org/10.1016/j.meatsci.2013.02.015

Aluwé, M., Tuyttens, F. A. M. and Millet, S. (2015). Field experience with surgical castration with anaesthesia, analgesia, immunocastration and production of entire male pigs: performance, carcass traits and boar taint prevalence. Animal: an international journal of animal bioscience, 9(3), 500. doi: https://doi.org/10.1017/s1751731114002894

Aluwé, M., Vanhonacker, F., Millet, S. and Tuyttens, A. M. (2015). Influence of hands-on experience on pig farmers‘ attitude towards alternatives for surgical castration of male piglets. Research in Veterinary Science, 103, 80–86. doi: https://doi.org/10.1016/j.rvsc.2015.09.019

Batorek, N., Candek-Potokar, M., Bonneau, M. and Van Milgen, J. (2012). Meta-analysis of the effect of immunocastration on production performance, reproductive organs and boar taint compounds in pigs.  Animal: an international journal of animal bioscience,  6(8), 1330. doi: https://doi.org/10.1017/s1751731112000146

Bee, G., Chevillon, P. and Bonneau, M. (2015). Entire male pig production in Europe.  Animal Production Science,  55(12), 1347–1359. doi: https://doi.org/10.1071/an15279

Bohrer, B. M., Flowers, W. L., Kyle, J. M., Johnson, S. S., King, V. L., Spruill, J. L. and Boler, D. D. (2014). Effect of gonadotropin releasing factor suppression with an immunological on growth performance, estrus activity, carcass characteristics, and meat quality of market gilts.  Journal of animal science, 92(10), 4719–4724. doi: https://doi.org/10.2527/jas.2014-7756

Brunius, C., Zamaratskaia, G., Andersson, K., Chen, G., Norrby, M., Madej, A. and Lundström, K. (2011). Early immunocastration of male pigs with Improvac® – Effect on boar taint, hormones and reproductive organs. Vaccine, 29(51), 9514–9520. doi: https://doi.org/10.1016/j.vaccine.2011.10.014

Čandek-Potokar, M., Škrlep, M. and Zamaratskaia, G. (2017). Immunocastration as alternative to surgical castration in pigs.  Theriogenology,  6, 109–126. doi: https://doi.org/10.5772/intechopen.68650

D’Souza, D. N. and Mullan, B. P. (2003). The effect of genotype and castration method on the eating quality characteristics of pork from male pigs.  Animal Science,  77(1), 67–72. doi: https://doi.org/10.1017/s1357729800053650

Dostálová, A., Koucký, M. and Průšová, V. (2008). Výkrm kanečků v podmínkách ekologického zemědělství. Mudrik, Z., Dvorak, J. Metodika zemědělského poradenského systemu.

Dunshea, F. R., Colantoni, C., Howard, K., McCauley, I., Jackson, P., Long, K. A. and Hennessy, D. P. (2001). Vaccination of boars with a GnRH vaccine (Improvac) eliminates boar taint and increases growth performance. Journal of animal science, 79(10), 2524–2535. doi: https://doi.org/10.2527/2001.79102524x

Fredriksen, B., Johnsen, A. M. S. and Skuterud, E. (2011). Consumer attitudes towards castration of piglets and alternatives to surgical castration.  Research in veterinary science, 90(2), 352–357. doi: https://doi.org/10.1016/j.rvsc.2010.06.018

Hennessy, D. and Newbold, R. (2004). Consumer attitudes to a boar taint vaccine, Improvac (R)–A qualitative study. In  Proceedings of the 18th IPVS congress, Hamburg, Germany, 612 p.

Holinger, M., Früh, B. and Hillmann, E. (2015). Group composition for fattening entire male pigs under enriched housing conditions – Influences on behaviour, injuries and boar taint compounds. Applied Animal Behaviour Science, 165, 47–56. doi: https://doi.org/10.1016/j.applanim.2015.01.016

Holinger, M., Früh, B., Stoll, P., Graage, R., Wirth, S., Bruckmaier, R. and Hillmann, E. (2018). Chronic intermittent stress exposure and access to grass silage interact differently in their effect on behaviour, gastric health and stress physiology of entire or castrated male growing-finishing pigs. Physiology & behavior, 195, 58–68. doi: https://doi.org/10.1016/j.physbeh.2018.07.01

Huber-Eicher, B. and Spring, P. (2008). Attitudes of Swiss consumers towards meat from entire or immunocastrated boars: A representative survey.  Research in veterinary science,  85(3), 625–627. doi: https://doi.org/10.1016/j.rvsc.2008.03.002

Viske, D., Lagerkvist, C. J. and Carlsson, F. (2006). Swedish consumer preferences for animal welfare and biotech: a choice experiment. AgBioForum 9(1), 51–58.

Mellor, D. J. and Stafford, K. J. (2004). Animal welfare implications of neonatal mortality and morbidity in farm animals. The veterinary journal, 168(2), 118–133. doi: https://doi.org/10.1016/j.tvjl.2003.08.004

Mellor, D. J. and Gregory, N. G. (2003). Responsiveness, behavioural arousal and awareness in fetal and newborn lambs: experimental, practical and therapeutic implications.  New Zealand veterinary journal,  51(1), 2–13. doi: https://doi.org/10.1080/00480169.2003.36323

Moberg, G. P. (2000). Biological response to stress: implications for animal welfare.  The biology of animal stress: basic principles and implications for animal welfare, 1, 21. doi: https://doi.org/10.1079/9780851993591.0001

Needham, T. and Hoffman, L. C. (2015). Physical meat quality and chemical composition of the Longissimus thoracis of entire and immunocastrated pigs fed varying dietary protein levels with and without ractopamine hydrochloride.  Meat science, 110, 101–108. doi: https://doi.org/10.1016/j.meatsci.2015.06.01

Némethová, S. (2018). Vplyv trieslovín na kvalitu a nutričné zloženie mäsa kančekov. Nitra: SPU.

Prunier, A., Bonneau, M., Von Borell, E. H., Cinotti, S., Gunn, M., Fredriksen, B. and Velarde, A. (2006). A review of the welfare consequences of surgical castration in piglets and the evaluation of non-surgical methods. Animal Welfare Journal, Universities Federation for Animal Welfare, 15, 277–289.

Seiquer, I., Palma-Granados, P., Haro, A., Lara, L., Lachica, M., Fernández-Fígares, I. and Nieto, R. (2019). Meat quality traits in longissimus lumborum and gluteus medius muscles from immunocastrated and surgically castrated Iberian pigs. Meat science, 150, 77–84. doi: https://doi.org/10.1016/j.meatsci.2018.12.004

Telles, F. G., Luna, S. P. L., Teixeira, G. and Berto, D. A. (2016). Long-term weight gain and economic impact in pigs castrated under local anaesthesia.  Veterinary and Animal Science, 1, 36–39. doi: https://doi.org/10.1016/j.vas.2016.11.003

Tuyttens, F. A., Vanhonacker, F., Langendries, K., Aluwé, M., Millet, S., Bekaert, K. and Verbeke, W. (2011). Effect of information provisioning on attitude toward surgical castration of male piglets and alternative strategies for avoiding boar taint.  Research in Veterinary Science,  91(2), 327–332. doi: https://doi.org/10.1016/j.rvsc.2011.01.005

Tuyttens, F. A., Vanhonacker, F., Verhille, B., De Brabander, D. and Verbeke, W. (2012). Pig producer attitude towards surgical castration of piglets without anaesthesia versus alternative strategies. Research in Veterinary Science, 92(3), 524– 530. doi: https://doi.org/10.1016/j.rvsc.2011.02.017

Von Borell, E., Baumgartner, J., Giersing, M., Jäggin, N., Prunier, A., Tuyttens, F. A. M. and Edwards, S. A. (2009). Animal welfare implications of surgical castration and its alternatives in pigs. Animal, 3(11), 1488–1496. doi: https://doi.org/10.1017/s1751731109004728