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Impacts of on farm management factors on herd fertility of commercial beef breeding herds in Northern Ireland

  • F. M. TITTERINGTON (a1), F. O. LIVELY (a1), A. ASHFIELD (a2), A. W. GORDON (a2), D. E. LOWE (a1) and S. J. MORRISON (a1)...


To assess the impact of farm management on herd fertility, a survey of 105 beef farms in Northern Ireland was conducted to establish the relationship between management variables and fertility. Each herd's average calving interval (CI) and the proportion of cows with a CI > 450 days (extended calving interval, ECI) was calculated to establish herd fertility. The relationship between each response variable (CI and proportion ECI) and each explanatory variable (respondents’ answers to questionnaire) was examined using univariate linear regression analyses. All response variables found to be associated with the explanatory variables were modelled against each group in turn using a fully automated multivariate stepwise regression algorithm employing the method of forward selection with backward elimination. The optimum 365-day CI and a proportion of 0 cows per hundred calved ECI targets were not widely attained in the current study. The distribution of CI and proportion ECI in the current study suggests more realistic targets would be a 379-day CI and 5 cows per hundred calved with ECI in commercial beef breeding herds. Six management factors were found to be associated with herd fertility: herd vaccination, bull selection, fertility management, breeding female management, perception of extension service (rural education provided by the government) and record keeping. It was found that respondents who vaccinated cows had a reduction of 5 cows per hundred calved in the proportion of cows with ECI, and as the number of vaccines administered to a cow increased, the CI decreased. Regular vaccination of breeding bulls was associated with a 9-day reduction in CI. Bull selection strategy had several associations with herd fertility; most notable was that respondents who used visual selection rather than estimated breeding values (EBVs) to select bulls were found to have a 15-day longer CI and 7 cows per hundred calved higher proportion of cows with ECI. For each 0·01 increase in the proportion of cows served by artificial insemination, CI increased by 0·16 days. Respondents who rated their beef breeding herd fertility as ‘very good’ had lower ECI and CI than those who rated beef breeding herd fertility as poor or satisfactory. Condition scoring of cows at weaning lowered ECI by 5 cows per hundred calved. Those who perceived the extension service to be very useful had the lowest CI and lowest ECI. Respondents who did not keep a record of CI to assess herd fertility had an 11-day longer CI and 6 cows per hundred calved higher proportion ECI than those who did not. In conclusion, the survey found a number of important variables linked to improved fertility including selecting sires based on EBVs and using a robust vaccination programme.


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Attride-Stirling, J. (2001). Thematic networks: an analytic tool for qualitative research. Qualitative Research 1, 385405.
Bascom, S. S. & Young, A. J. (1998). A summary of the reasons why farmers cull cows. Journal of Dairy Science 81, 22992305.
Bellows, D. S., Ott, S. L. & Bellows, R. A. (2002). Review: cost of reproductive diseases and conditions in cattle. The Professional Animal Scientist 18, 2632.
Berry, D. P., Wall, E. & Pryce, J. E. (2014). Genetics and genomics of reproductive performance in dairy and beef cattle. Animal 8 (Suppl 1), 105121.
Blanc, F. & Agabriel, J. (2008). Modelling the reproductive efficiency in a beef cow herd: effect of calving date, bull exposure and body condition at calving on the calving–conception interval and calving distribution. Journal of Agricultural Science (Cambridge) 146, 143161.
Bourdon, R. M. & Brinks, J. S. (1982). Genetic, environmental and phenotypic relationships among gestation length, birth weight, growth traits and age at first calving in beef cattle. Journal of Animal Science 55, 543553.
Brown, L. O., Durham, R. M., Cobb, E. & Knox, J. (1954). An analysis of the components of variance in calving intervals in a range herd of beef cattle. Journal of Animal Science 13, 511516.
Burris, M. J. & Blunn, C. T. (1952). Some factors affecting gestation length and birth weight of beef cattle. Journal of Animal Science 11, 3441.
Casas, E., Thallman, R. M. & Cundiff, L. V. (2011). Birth and weaning traits in crossbred cattle from Hereford, Angus, Brahman, Boran, Tuli, and Belgian Blue sires. Journal of Animal Science 89, 979987.
Casas, E., Thallman, R. M. & Cundiff, L. V. (2012). Birth and weaning traits in crossbred cattle from Hereford, Angus, Norwegian Red, Swedish Red and White, Wagyu, and Friesian sires. Journal of Animal Science 90, 29162920.
Costa, R. M., Ponsano, E. H. G., De Souza, V. C. & Malafaia, P. (2016). Reduction of phosphorus concentration in mineral supplement on fertility rate, maternal ability and costs of beef cows reared in pastures of Urochloa decumbens. Tropical Animal Health and Production 48, 417422.
Cresswell, E., Brennan, M. L., Barkema, H. W. & Wapenaar, W. (2014). A questionnaire-based survey on the uptake and use of cattle vaccines in the UK. Veterinary Record Open 1, e000042. doi: 10.1136/vropen-2014–000042
Crowe, M. A. (2008). Resumption of ovarian cyclicity in post-partum beef and dairy cows. Reproduction in Domestic Animals 43 (Suppl. 5), 2028.
DAERA (2014). Less Favoured Area Compensatory Allowances (LFACA) Scheme 2015: Explanatory Notes. Belfast, UK: DARD. Available from: (verified 6 December 2016).
Diskin, M. G. & Kenny, D. A. (2016). Managing the reproductive performance of beef cows. Theriogenology 86, 379387.
Donoghue, K. A., Rekaya, R., Bertrand, J. K. & Misztal, I. (2004). Threshold-linear analysis of measures of fertility in artificial insemination data and days to calving in beef cattle. Journal of Animal Science 82, 987993.
Duponte, M. W. (2007). The Basics of Heat (Estrus) Detection in Cattle. Livestock Management no. 15. Honolulu, HI: University of Hawaii.
Flett, R., Alpass, F., Humphries, S., Massey, C., Morriss, S. & Long, N. (2004). The technology acceptance model and use of technology in New Zealand dairy farming. Agricultural Systems 80, 199211.
French, J. M., Moore, G. F., Perry, G. C. & Long, S. E. (1989). Behavioural predictors of oestrus in domestic cattle, Bos taurus . Animal Behaviour 38, 913919.
Fulton, N. & McCormack, C. (2012). The Agricultural Census in Northern Ireland: Results for June 2012. London, UK: HMSO. Available from: (verified 15 September 2016).
Gates, M. C. (2013). Evaluating the reproductive performance of British beef and dairy herds using national cattle movement records. Veterinary Record 173, 499.
Givens, M. D. (2006). A clinical, evidence-based approach to infectious causes of infertility in beef cattle. Theriogenology 66, 648654.
Givens, M. D. & Marley, M. S. (2008). Pathogens that cause infertility of bulls or transmission via semen. Theriogenology 70, 504507.
Grimard, B., Freret, S., Chevallier, A., Pinto, A., Ponsart, C. & Humblot, P. (2006). Genetic and environmental factors influencing first service conception rate and late embryonic/foetal mortality in low fertility dairy herds. Animal Reproduction Science 91, 3144.
Guerin, L. J. & Guerin, T. F. (1994). Constraints to the adoption of innovations in agricultural research and environmental management: a review. Australian Journal of Experimental Agriculture 34, 549571.
Gutierrez, J. P., Alverez, I., Fernandez, I., Royo, L. J., Diez, J. & Goyache, F. (2002). Genetic relationships between calving date, calving interval, age at first calving and type traits in beef cattle. Livestock Production Science 78, 215222.
Herd, D. B. & Sprott, L. R. (1998). Body Condition, Nutrition and Reproduction of Beef Cows. Texas Agricultural Extension Service B-1526. College Station, TX: The texas A&M University System.
Hickson, R. E., Morris, S. T., Kenyon, P. R. & Lopez-Villalobos, N. (2006). Dystocia in beef heifers: a review of genetic and nutritional influences. New Zealand Veterinary Journal 54, 256264.
Ingram, J. (2008). Agronomist–farmer knowledge encounters: an analysis of knowledge exchange in the context of best management practices in England. Agriculture and Human Values 25, 405418.
Irish Cattle Breeding Federation (2015). Beef Calving Statistics 2010–2015. Bandon, Ireland: Irish Cattle Breeding Federation. Available from: (verified 16 September 2016).
Kilpatrick, S. (1996). Change, Training and Farm Profitability: A National Farmers Federation Discussion Paper. National Focus vol. 10. Kingston, Australia: National Farmers Federation.
Kunkle, W. E. & Sand, R. S. (2006). Effect of Body Condition on Rebreeding. Publication no. AS51. Gainesville, FL: University of Florida Extension Service.
Lamb, G. C. (1999). Influence of Nutrition on Reproduction in the Beef Cow Herd. Saint Paul, MN: University of Minnesota.
Laster, D. B., Glimp, H. A., Cundiff, L. V. & Gregory, K. E. (1973). Factors affecting dystocia and the effects of dystocia on subsequent reproduction in beef cattle. Journal of Animal Science 36, 695705.
Lewis, T. (1998). Evolution of farm management information systems. Computers and Electronics in Agriculture 19, 233248.
Losinger, W. C. & Heinrichs, A. J. (1996). Dairy operation management practices and herd milk production. Journal of Dairy Science 79, 506514.
Loucks, R. R., Oltjen, J. W. & Trapp, J. N. (2012). Cattle Producer's Handbook, 3rd edn. Corvallis, OR: Oregon State University. Available from: (verified 16 September 2016).
Lowman, B. (2012). Cost/day of an extended calving interval. SRUC/SAC Consulting Sheep and Beef news July 2012, 22.
Lubout, P. C. & Swanepoel, F. J. C. (1992). Consequences of selection for growth in indigenous beef cattle in a stressful environment. Australian Association of Animal Breeding and Genetics 10, 376379.
MacGregor, R. G. & Casey, N. H. (2000). The effects of maternal calving date and calving interval on growth performance of beef calves. South African Journal of Animal Science 30, 7076.
McCann, M. & Colhoun, K. (2007). Briefing Paper: The Red Meat Industry Task Force. Belfast, UK: Northern Ireland Assembly. Available from: (verified 16 September 2016).
McCown, R. L. (2002). Changing systems for supporting farmers’ decisions: problems, paradigms, and prospects. Agricultural Systems 74, 179220.
Mee, J. F. (2008). Prevalence and risk factors for dystocia in dairy cattle: a review. Veterinary Journal 176, 93101.
Melendez, P., Donovan, G. A., Risco, C. A., Littell, R. & Goff, J. P. (2003). Effect of calcium-energy supplements on calving-related disorders, fertility and milk yield during the transition period in cows fed anionic diets. Theriogenology 60, 843854.
Meyer, K., Hammond, K., Parnell, P. F., MacKinnon, M. J. & Sivarajasingam, S. (1990). Estimates of heritability and repeatability for reproductive traits in Australian beef cattle. Livestock Production Science 25, 1530.
Mokhtari, M. S., Shahrbabak, M. M., Javaremi, A. N. & Rosa, G. J. M. (2015). Genetic relationship between heifers and cows fertility and milk yield traits in first-parity Iranian Holstein dairy cows. Livestock Science 182, 7682.
Morrison, D. G., Feazel, J. I., Bagley, C. P. & Blouin, D. C. (1992). Postweaning growth and reproduction of beef heifers exposed to calve at 24 or 30 months of age in spring and fall seasons. Journal of Animal Science 70, 622630.
Newman, S., Lynch, T. & Plummer, A. A. (2000). Success and failure of decision support systems: learning as we go. Journal of Animal Science 77 (E-Suppl), 112.
Núñez-Domínguez, R., Cundiff, L. V., Dickerson, G. E., Gregory, K. E. & Koch, R. M. (1991). Lifetime production of beef heifers calving first at two vs three years of age. Journal of Animal Science 69, 34673479.
Olori, V. E., Meuwissen, T. H. E. & Veerkamp, R. F. (2002). Calving interval and survival breeding values as measure of cow fertility in a pasture-based production system with seasonal calving. Journal of Dairy Science 85, 689696.
Palmer, C. W. (2011). Evaluating a bull's ability to breed. Limousin Voice Magazine, Winter 2011, 6566.
Phocas, F. & Laloë, D. (2003). Evaluation models and genetic parameters for calving difficulty in beef cattle. Journal of Animal Science 81, 933938.
Powell, J. (2004). Culling the Beef Cow Herd. University of Arkansas Cooperative Extension Service. Fact Sheet # FSA-3092. Fayetteville, AR: University of Arkansas.
Ramsey, R., Doye, D., Ward, C., McGrann, J. M., Falconer, L. L. & Bevers, S. J. (2005). Factors affecting beef cow-herd costs, production, and profits. Journal of Agricultural and Applied Economics 37, 9199.
Rao, T. K. S., Kumar, N., Kumar, P., Chaurasia, S. & Patel, N. B. (2013). Heat detection techniques in cattle and buffalo. Veterinary World 6, 363369.
Rhone, J. A., Koonawootrittriron, S. & Elzo, M. A. (2008). Record keeping, genetic selection, educational experience and farm management effects on average milk yield per cow, milk fat percentage, bacterial score and bulk tank somatic cell count of dairy farms in the Central region of Thailand. Tropical Animal Health Production 40, 627636.
Roche, J. F., Mackey, D. & Diskin, M. D. (2000). Reproductive management of postpartum cows. Animal Reproduction Science 60, 703712.
Roelofs, J., López-Gatius, F., Hunter, R. H. F., Van Eerdenburg, F. J. C. M. & Hanzen, Ch. (2010). When is a cow in estrus? Clinical and practical aspects. Theriogenology 74, 327344.
Sasaki, Y., Miyake, T., Gaillard, C., Oguni, T., Matsumoto, M., Ito, M., Kurahara, T., Sasae, Y., Fujinaka, K., Ohtagaki, S. & Dougo, T. (2006). Comparison of genetic gains per year for carcass traits among breeding programs in the Japanese Brown and the Japanese Black cattle. Journal of Animal Science 84, 317323.
Sayers, R., O'Doherty, E., Bloemhoff, Y. & Byrne, N. (2012). Infectious disease status and links to fertility. Dairy Cow Fertility, Reproductive Performance for Efficient Pasture-Based Systems International Conference (Ed. Dillon, P.), pp. 6271. Moorepark, Fermoy, Ireland: Teagasc.
Smith, M. F., Pohler, K. G., Perry, G. A. & Patterson, D. (2013). Physiological factors that affect pregnancy rate to artificial insemination in beef cattle. In Proceedings: Applied Reproductive Strategies in Beef Cattle, October 15–16 2013. pp. 3351. Staunton, VA: Beef Reproduction Task Force. Available from: (verified 17 February 2017).
Titterington, F. M., Morrison, S. J., Lively, F. O., Wylie, A. R. G., Gordon, A. W. & Browne, M. R. (2015). An analysis of Northern Ireland farmers’ experiences of using a target-driven beef heifer growth management plan and development of an empirical model leading to the launch of a decision support tool to promote first calving of beef heifers at 24 months. Agricultural Systems 132, 107120.
Van Eerdenburg, F. J., Loeffler, H. S. & van Vliet, J. H. (1996). Detection of oestrus in dairy cows: a new approach to an old problem. Veterinary Quarterly 18, 5254.
Vickers, M. (2014). Optimising Suckler Herd Fertility for Better Returns. Kenilworth, UK: EBLEX. Available from: (verified 16 September 2016).
Willock, J., Deary, I. J., McGregor, M. M., Sutherland, A., Edwards-Jones, G., Morgan, O., Dent, B., Grieve, R., Gibson, G. & Austin, E. (1999). Farmers’ attitudes, objectives, behaviors, and personality traits: the Edinburgh study of decision making on farms. Journal of Vocational Behavior 54, 536.
Zaborski, D., Grzesiak, W., Szatkowska, I., Dybus, A., Muszynska, M. & Jedrzejczak, M. (2009). Factors affecting dystocia in cattle. Reproduction in Domestic Animals 44, 540551.


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