Bull-bull mounts in Holstein bulls: a survey of its incidence, possible causes, and consequences in Uruguayan bull’ breeders
Acosta JE, Schake LM, Brown GC, Vermedah LD. Influence of implants, feed additive, and pen size upon incidence of buller steers. College Station: Texas Agricultural Experiment Station; 1981. p. 130-3. (Beef Cattle Research in Texas).
Andersen IL, Roussel S, Ropstad E, Braastad BO, Steinheim G, Janczak AM, Jørgensen G, Bøe KE. Social instability increases aggression in groups of dairy goats, but with minor consequences for the goats’ growth, kid production and development. Appl Anim Behav Sci. 2008;114(1-2):132-48.
Bartoš L, Franc C, Albiston G, Beber K. Prevention of dark cutting (DFD) beef in penned bulls at the abattoir. Meat Sci. 1988;22(3):213-20.
Blackshaw J, Blackshaw A, McGlone J. Buller steer syndrome review. Appl Anim Behav Sci. 1997;54(2-3):97-108.
Blumetto O, Ruggia A, Dalmau A, Estellés F, Villagrá A. Behavioural characterisation of Holstein steers in three different production systems. Anim Prod Sci. 2015;56(10):1683-92.
Bouissou MF, Boissy A, Le-Neindre P, Veissier I. Social behaviour of farm animals. In: Keeling L, Gonyou H, editors. Social behaviour in farm animals. Wallingford, UK: CABI International; 2001. p. 113-45.
Bozkurt Y, Ozkaya S, Ap Dewi I. Association between aggressive behaviour and high-energy feeding level in beef cattle. Czech J Anim Sci. 2006;51(4):151-6.
Brower GR, Kiracofe GH. Factors associated with the buller steer syndrome. J Anim Sci. 1978;46(1):26-31.
Clavelle J. A description of mount behaviour during the buller steer syndrome in a western Canadian feedlot. In: Proceedings of the 5th North American Regional Meeting ISAE; 2002 Jul 20-21; Quebec, Canada. Rome: ISAE; 2002. p. 9.
European Food Safety Authority – EFSA. Annual Report of the EFSA Journal 2012. EFSA Support Publ. 2013;10(4):418E.
European Union. Council of Europe. Animal health and welfare. Animals kept for farming purposes. Recommendations adapted by the standing committee of the European Convention for the Protection of Animals Kept for Farming Purposes. Recommendations concerning cattle. Appendix A: Social provisions for bulls kept for breeding or fattening. Brussels; 1988.
Franc C, Bartoš L, Hanyš Z, Tomeš Z. Pre-slaughter social activity of young bulls relating to the occurrence of dark-cutting beef. Anim Sci. 1988;46(2):153-61.
Freitas-De-Melo A, Lacuesta L, Ungerfeld R. Homosexual behavior in male ruminants: a review. Rev Mex Cienc Pecu. 2014;5:91-106.
Giriboni J, Lacuesta L, Damián J, Ungerfeld R. Grouping previously unknown bucks is a stressor with negative effects on reproduction. Trop Anim Health Prod. 2015;47(2):317-22.
Jago J, Matthews L, Trigg TE, Dobbie P, Bass JJ. The effect of immunocastration 7 weeks before slaughter on the behaviour, growth and meat quality of post-pubertal bulls. Anim Sci. 1999;68(1):163-71.
Jezierski TA, Koziorowski M, Goszczyński J, Sieradzka I. Homosexual and social behaviours of young bulls of different geno- and phenotypes and plasma concentrations of some hormones. Appl Anim Behav Sci. 1989;24(2):101-13.
Keane M. Beef production from Holstein–Friesian bulls and steers of New Zealand and European/American descent, and Belgian Blue Holstein–Friesians, slaughtered at two weights. Livest Prod Sci. 2003;84(3):207-18.
Kirkland R, Keady T, Patterson D, Kilpatrick D, Steen R. The effect of slaughter weight and sexual status on performance characteristics of male Holstein-Friesian cattle offered a cereal-based diet. Anim Sci. 2006;82(3):397-404.
Klemm W, Sherry C, Schake L, Sis RF. Homosexual behavior in feedlot steers: an aggression hypothesis. Appl Anim Ethol. 1983;11(2):187-95.
Meyer BD. Comparison of serum steroidal hormone concentrations in buller steers, riders, and uninterested penmates: implication for the etiology of the buller steer syndrome in North American feedlots [thesis]. Iowa: Iowa State University; 2001.
Mohan Raj A, Moss B, McCaughey W, McLauchlan W, Kilpatrick D, McGaughey S. Behavioural response to mixing of entire bulls, vasectomised bulls and steers. Appl Anim Behav Sci. 1991;31(3-4):157-68.
Patt A, Gygax L, Wechsler B, Hillmann E, Palme R, Keil N. The introduction of individual goats into small established groups has serious negative effects on the introduced goat but not on resident goats. Appl Anim Behav Sci. 2012;138(1-2):47-59.
Phillips C. Cattle behaviour and welfare. 2nd ed. Blackwell Publishing Company; 2002.
Pierson RE, Jensen R, Braddy PM, Horton DP, Christie RM. Bulling among yearling feedlot steers. J Am Vet Med Assoc. 1976;169(5):521-3. PMid:956030.
Sánchez-Dávila F, Barragán H, del Bosque-González A, Ungerfeld R. Social dominance affects the development of sexual behaviour but not semen output in yearling bucks. Theriogenology. 2018;110:168-74.
Schwartzkopf-Genswein K, Gellatly D, Mélendez Suarez D, Janzen E, Marti S. Welfare issues in feedlot cattle. In: Engle T, Klingbord D, Rollin B, editors. The welfare of cattle. Boca Raton: CRC Press; 2019. p. 211-34.
Steen R, Kilpatrick D. Effects of plane of nutrition and slaughter weight on the carcass composition of serially slaughtered bulls, steers and heifers of three breed crosses. Livest Prod Sci. 1995;43(3):205-13.
Tennessen T, Price M, Berg R. The social interactions of young bulls and steers after re-grouping. Appl Anim Behav Sci. 1985;14(1):37-47.
Tucker C, Coetzee J, Stookey J, Thomson D, Grandin T, Schwartzkopf-Genswein K. Beef cattle welfare in the USA: identification of priorities for future research. Anim Health Res Rev. 2015;16(2):107-24.
Ungerfeld R, González-Pensado SP. Social rank affects reproductive development in male lambs. Anim Reprod Sci. 2008;109(1-4):161-71.
Ungerfeld R, Lacuesta L, Damián JP, Giriboni J. Does heterosexual experience matters for bucks’ homosexual mating behavior? J Vet Behav. 2013;8(6):471-4.
Ungerfeld R, Ramos M, Bielli A. Relationship between male-male and male-female sexual behavior in 5-6-month-old male lambs. Anim Reprod Sci. 2007;100(3-4):385-90.
Vervaecke H, Roden C. Going with the herd: same-sex interaction and competition in American bison. In: Sommer V, Vasey PL, editors. Homosexual behaviour in animals: an evolutionary perspective. Cambridge: Cambridge University Press; 2006. p. 131-53.
Voyles VL, Brown MS, Swingle RS, Karr KJ. Effects of implant programs on buller incidence, feedlot performance, and carcass characteristics of yearling steers. Prof Anim Sci. 2004;20(4):344-52.
Wettemann R, Lehman F. Buller steers: causes and control. In: Symposium: Impact of Implants on Performance and Carcass Value of Beef Cattle; 1997; Oklahoma. Stillwater: Oklahoma Agricultural Experiment Station; 1997.
World Organisation for Animal Health – OIE. OIE ad hoc group on animal welfare and beef cattle production systems. Paris; 2009.