Performance and plasma urea nitrogen of immunocastrated males pigs of medium genetic potential

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Fabiana R Caldara Rita KS Santos Luan S Santos Luciana Foppa Irenilza A Nääs Rodrigo G Garcia Simone P Machado

Resumen

ABSTRACT

Objective. A study was carried out to evaluate the performance and the plasma urea nitrogen (PUN) of male pigs of medium genetic potential for lean meat deposition in carcass, which underwent immunocastration. Materials and methods. Forty-five seventy-days old Large White x Landrace crossbred were used. The pigs were distributed in a randomized design in three treatments: castrated males, females and immunocastrated males. Each treatment group was replicated three times with five pigs per replicate. The trial period was of 70 days, divided into phases of growing (70 to 110 days old) and finishing (111 to 140 days old). The pigs were weighed four times: at the beginning of the trial, at the first immunocastration vaccine dose (80 days old), at the second immunocastration vaccine dose (110 days old) and just before slaughter (140 days old). Blood samples were taken on the same day that the animals were weighed. Results. Between 80 and 110 days old, there was an increase in PUN value, only for castrated males and females. No differences were found in weight gain between the studied groups within the periods. Immunocastrated males had lower feed intake than females and these had a lower feed intake than castrated males. To 110 days old, immunocastrated animals showed feed conversion ratio similar to females and better than castrated males. However, after the second dose of the vaccine, feed conversion was similar between groups. Conclusions. The benefits of immunocastration are prominent in animals with low to medium genetic potential.

RESUMEN

Objetivo. Se realizó un estudio para evaluar el rendimiento y la concentración de urea en plasma (PUN) de los cerdos machos de medio potencial genético de carne magra en la canal sometidos a la inmunocastración. Materiales y métodos. Se utilizaron 45 cerdos de 70 días de edad Landrace x Large White. Los animales se distribuyeron en un diseño completamente al azar con tres tratamientos: machos castrados, hembras y machos inmunocastrados. Cada tratamiento consistió en tres repeticiones, con cinco animales por réplica. El período experimental fue de 70 días, divididos en las etapas de crecimiento (70 a 110 días de edad) y terminación (111 a 140 días de edad). Los cerdos fueron pesados cuatro veces: al inicio del experimento, en la primera dosis de vacuna de inmunocastración (80 días de edad), en la segunda dosis de la vacuna de inmunocastración (110 días de edad) y antes de el sacrificio (140 días de edad). Las muestras de sangre se recogieron en el mismo día en que se pesaron los animales. Resultados. Entre 80 y 110 días de edad, hubo un aumento en la cantidad de PUN, sólo para machos castrados y hembras. No hubo diferencias en la ganancia de peso entre los grupos en ninguno de los períodos estudiados. Machos inmunocastrados tuvieron menor consumo de alimento que las hembras y éstas mostraron un menor consumo que los machos castrados. En 110 días de edad, los animales inmunocastrados mostraron la conversión de alimento similar a las hembras y mejor que los machos castrados. Sin embargo, después de la segunda dosis de la vacuna, la conversión alimenticia fue similar entre los grupos. Conclusiones. Los beneficios de inmunocastración son prominentes en animales con bajo a médio potencial genético.

 

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Referencias

1. Van Weerden EJ, Grandadam JA. The effect of an anabolic agent on N-deposition, growth, and slaughter quality in growing male pigs. Environ Qual Saf Suppl 1976; (5):115-22.

2. Chen SY, Wang J, Yu G, Liu W, Pearce D. Androgen and glucocorticoid receptor heterodimer formation. J Biol Chem 1997; 272(22):14087-14092. http://dx.doi.org/10.1074/jbc.272.22.14087

3. Rault JL, Lay Jr DC, Marchant-Forde JN. Castration induced pain in pigs and other livestock. Appl Anim Behav Sci 2011; 135(3):214-225. http://dx.doi.org/10.1016/j.applanim.2011.10.017

4. Bauer A, Lacorn M, Danowski K, Claus R. Effects of immunization against GnRH on gonadotropins, the GH-IGF-I-axis and metabolic parameters in barrows. Animal 2008; 2(8):1215-1222.
http://dx.doi.org/10.1017/S1751731108002346

5. Puppe B, Schön PC, Tuchscherer A, Manteuffel G. Castration-induced vocalisation in domestic piglets, Sus Scrofa: complex and specific alterations of the vocal quality. Appl Anim Behav 2005; 95(1,2):67-78.

6. Thun R, GajewskI Z, Janett F. Castration in male pigs: techniques and animal welfare issues. J Physiol Pharmacol 2006; 57(8):189-194.

7. Zamaratskaia G, Squires EJ. Biochemical, nutritional and genetic effects on boar taint in entire male pigs. Animal 2009; 3(11):1508-1521. http://dx.doi.org/10.1017/S1751731108003674

8. Dunshea FR, Colantoni C, Howard K, McCauley I, Jackson P, Long KA, et al. Vaccination of boars with a GnRH vaccine (Improvac) eliminates boar taint and increases growth performance. J Anim Sci 2001; 79(10):2524-2535.
http://dx.doi.org/10.2527/2001.79102524x

9. Caldara FR, Moi M, Santos LS, Almeida Paz ICL, Garcia RG, Nääs IA, et al. Carcass Characteristics and Qualitative Attributes of Pork from Immunocastrated Animals. Asian Australas. J Anim Sci 2013; 26(11):1630-1636. http://dx.doi.org/10.5713/ajas.2013.13160

10. Pauly C, Spring P, O'Doherty V, Ampuero Kragten S, Bee G. Growth performance, carcass characteristics and meat quality of group-penned surgically castrated immunocastrated (Improvac®) and entire male pigs and individually penned entire male pigs. Animal 2009; 2(7):1-10. http://dx.doi.org/10.1017/s1751731109004418

11. Gispert M, Oliver MA, Velarde A, Suarez P, Perez J, Font i Furnols M. Carcass and meat quality characteristics of immunocastrated male, surgically castrated male, and entire male pigs. Meat Sci 2010; 85(4):664–670.
http://dx.doi.org/10.1016/j.meatsci.2010.03.021

12. Škrlep M, Šegula B, Prevolnik M, Kirbiš A, Fazarinc G, Čandek-Potokar M. Effect of immunocastration (Improvac®) in fattening pigs II: Carcass traits and meat quality. Slov Vet Res 2010; 47(2):65–72.

13. Rostagno HS, Albino LFT, Donzele JL, Gomes PC, Oliveira RF, Lopes DC, et al. Tabelas Brasileiras para aves e suínos. Composição de alimentos e exigências nutricionais. 3. ed. Minas Gerais, Viçosa: Universidade Federal de Viçosa; 2011

14. SAS. Statistical Analysis System [CD-ROM]. SAS/ Version 6. 6th ed. Cary, North Carolina, USA: SAS Inst, Inc; 2001.

15. Moreira I, Sartori IM, Paiano D, Martins RM, Oliveira GC. Utilização do farelo de algodão, com ou sem a adição de ferro, na alimentação de leitões na fase inicial (15-30 kg). R Bras Zootec 2006; 35(3):1077-1084. http://dx.doi.org/10.1590/S1516-35982006000400019

16. Moreira I, Kutschenko M, Furlan AC, Murakami AE, Martins EN, Scapinello C. Exigência de lisina para suínos em crescimento e terminação, alimentados com rações de baixo teor de proteína, formuladas de acordo com o conceito de proteína ideal. Acta Sci - Anim Sci 2004; 26(4):537-542. http://dx.doi.org/10.4025/actascianimsci.v26i4.1760

17. Santos AP, Kiefer C, Martins LP, Fantini CC. Restrição alimentar para suínos machos castrados e imunocastrados em terminação. Ciênc. Rural 2012; 42(1):147-153. http://dx.doi.org/10.1590/S0103-84782012000100024

18. Pauly C, Spring P, O'Doherty V, Ampuero Kragten S, Bee G. Performances, meat quality, and boar taint of castrates and entire male pigs fed a standard and a raw potato starch-enriched diet. Animal 2008; 2(11):1707-1715. http://dx.doi.org/10.1017/S1751731108002826

19. Zamaratskaia G, Andersson HK, Chen G, Andersson K, Madej A, Lundström K. Effect of a gonadotropin-releasing hormone vaccine (improvacTM) on steroid hormones, boar taint compounds and performance in entire male pigs. Reprod Domest Anim 2008; 43(3):351-359. http://dx.doi.org/10.1111/j.1439-0531.2007.00914.x

20. Jaros P, Bürgi Stärk KDC, Claus R, Hennessy D, Thun R. Effect of active immunization against GnRH on androstenone concentration, growth performance and carcass quality in intact male pigs. Livest Prod Sci 2005; 92(1):31-38.
http://dx.doi.org/10.1016/j.livprodsci.2004.07.011

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