Óscar López Campos, Ph.D.

Image Oscar Lopez Campos
Research Scientist

Since the first grading policies for pork in 1922, for beef in 1927, and for bison in the late 1950s, the Canadian grading systems have been continuously evolving as a means of classifying carcasses with similar attributes into similar classes or ‘‘grades’’. In Canada, quality and yield grades form the language for trade, facilitate marketing and production decisions, and ensure that consumers are able to purchase a predictable and consistent product. The objectivity of the grading systems is a fundamental pillar of carcass classification and the implementation of objective methods at the grading stand has been one of the main goals pursued by the Canadian Livestock Industry. In this sense, the major objectives of Dr. Óscar López Campos’ Livestock Carcass Merit and Market Competitiveness program are focused on identifying measuring, prioritizing and utilizing objective and subjective carcass merit and meat quality assessments and attributes of economic importance to promote development, adaptation and competitiveness of the whole meat value-chain in Canada.

Current research and/or projects

Currently, Dr. López Campos value-chain approach to research into carcass and meat quality issues provides critical support for growth in complexity and competitiveness of the Meat Industry.

Research and/or project statements

  • Development of yield prediction tools to optimize carcass cut-out value.
  • Developing a Canadian Total Quality Management System for Beef Processing.
  • Beef Quality Canada’s National Beef Quality Audit at Retail and Processing.
  • Evaluating the Canadian beef grading ruler to predict USDA five yield grades based on a modified yield percentage matrix.
  • Classifying Canadian pork based on quality attributes.

Professional activities / interests

  • Carcass Merit and Market Competitiveness.

  • Carcass classification (beef, bison, veal, pork and sheep).

  • Grading systems (beef, bison, veal and sheep).

  • Meat Quality.

Education and awards

  • 2007 - Ph.D. in Animal Production. University of León (Spain).
  • 2004 - Master in Veterinary. University of León (Spain).
  • 2003 - Master in Pedagogical Aptitude Certificate. University of León (Spain).
  • 2002 - B.Sc. Biology. University of León (Spain).

International experience and/or work

  • 2015 - present: Carcass Merit and Market Competitiveness Research Scientist. Lacombe Research and Development Centre, Agricultural and Agri-Food Canada.

  • 2012 – 2015: Research Associate on Carcass Classification and Grading with Livestock Gentec, University of Alberta (Canada).

  • 2009 - 2012: Post-doctoral Researcher thorough the NSERC Visiting Fellowship in Canadian Government Laboratories Program. Meat Research team at Lacombe Research and Development Centre, Agricultural and Agri-Food Canada.

  • 2006 - 2009: Biologist for research and laboratories at the Mountain Cattle Institute of the Spanish National Research Council (CSIC).

  • 2003 - 2006: Pre-doctoral Fellow at the Spanish National Research Council (CSIC - ULE).


Key publications

For a complete list of publications, please visit: AAFC Online

López-Campos, Ó.; Prieto, N.; Juárez, M. and Aalhus, J. L. New technologies available for livestock carcass classification and grading. CAB Reviews, Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources, 14 (018), 1-10 (2019).10.1079/PAVSNNR201914018

Prieto, N.; Osika, E.; Aalhus, J. L.; López-Campos, Ó.; Juárez, M. and Pawluczyk, O. Application of hyperspectral imaging on meat and meat products. CAB Reviews, 13 (042), 1-11 (2018). 10.1079/PAVSNNR201813042

Juárez, M.; Roberts, J. C.; López-Campos, Ó.; Prieto, N. and Aalhus, J. L. Focusing on phenomics to unlock the potential of livestock genomics. CAB Reviews, 13 (019), 1-8 (2018). 10.1079/PAVSNNR201813019

López-Campos, Ó.; Roberts, J. C.; Larsen, I. L.; Prieto, N.; Juárez, M.; Dugan, M. E. R.; Aalhus, J. L. Rapid and non-destructive determination of lean fat and bone content in beef using dual energy X-ray absorptiometry. Meat Science, 146: 140-146 (2018). https://doi.org/10.1016/j.meatsci.2018.07.009

Juárez, M.; López-Campos, Ó.; Roberts, J. C.; Prieto, N.; Larsen, I. L.; Uttaro, B.; Dugan, M. E. R.; Cancino-Baier, D.; Hosford, S.; Galbraith, J. and Aalhus, J.L. Exploration of methods for lamb carcass yield estimation in Canada. Canadian Journal of Animal Science, 98 (4): 760-768 (2018). https://doi.org/10.1139/CJAS-2017-0208

Roberts, J. C.; Rodas-González, A. R.; Juárez, M.; López-Campos, Ó.; Larsen, I. L. and Aalhus, J. L. Tenderness and sensory attributes of eleven muscles from carcasses within the Canadian cull cow grades. Canadian Journal of Animal Science, 2018, 98 (2): 230-240, (2018). https://doi.org/10.1139/CJAS-2017-0105.

Juárez, M.; Horcada, A.; Prieto, N.; Roberts, J. C.; Dugan, M. E. R.; López-Campos, Ó.; Uttaro, B.; Larsen, I. L.; Hosford, S.; Galbraith, J. and Aalhus, J. L. Guaranteeing Canadian lamb meat quality using near infrared spectroscopy on intact rack. Canadian Journal of Animal Science, 98 (2): 390-393 (2018). https://doi.org/10.1139/CJAS-2017-0106.

Prieto, N.; Dugan, M. E. R.; Juárez, M.; López-Campos, Ó.; Zijlstra, R. T. and Aalhus, J.L. Using portable near infrared spectroscopy to predict pig subcutaneous fat composition and iodine value. Canadian Journal of Animal Science, 98 (2): 221-229 (2018). https://doi.org/10.1139/CJAS-2017-0033

Prieto, N.; López-Campos, Ó.; Suman, S. P.; Uttaro, B. Rodas-González, A. and Aalhus, J. L. Exploring innovative possibilities of recovering value of dark-cutting beef in the Canadian grading system. Meat Science, 137: 77-84 (2018). https://doi.org/10.1016/j.meatsci.2017.11.013.

López-Campos, Ó.; Robertson, W.M.; Dugan, M.E.R.; Larsen, I.L.; Roberts, J.C.; Uttaro, B. and Aalhus, J.L. Effect of growth promoting implants and high-voltage electrical stimulation on quality characteristics of finished steers. Canadian Journal of Animal Science, 98 (1): 166-176 (2018). https://doi.org/10.1139/CJAS-2016-0155

Roberts, J. C.; Rodas-González, A.; Galbraith, J.; Dugan, M.E.R.; Larsen, I.L.; Aalhus, J.L. and López-Campos, Ó. Nitrite embedded vacuum packaging improves retail characteristics and oxidative stability of bison steaks and burgers. Meat and Muscle Biology. Meat and Muscle Biology, 1 (1): 169-180 (2017). https://10.22175/mmb2017.03.0015

.Roberts, J.; Rodas-González, A.; Juárez, M.; López-Campos, Ó.; Larsen, I.L. and Aalhus, J.L. Muscle profiling of retail characteristics within the Canadian cull cow grades. Canadian Journal of Animal Science, 97 (4): 562-573 (2017). https://doi.org/10.1139/cjas-2017-0001.

Vahmani, P.; Rolland, D.C.; McAllister, T.A.; Block, H.C.; Proctor, S.D.; Guan, L.L.; Prieto, N.; Aalhus, J.L.; López-Campos, Ó. and Dugan, M.E.R. Effects of feeding steers extruded flaxseed mixed with hay or before hay on animal performance, carcass quality, and meat and hamburger fatty acid composition. Meat Science, 131 (Supplement C): 9-17 (2017). http://doi.org/10.1016/j.meatsci.2017.04.008.

Narváez-Bravo, C.; Rodas-González, A.; Ding, Ch.; López-Campos, Ó.; Galbraith, J.; Larsen, I.; Ye, J.; Siegel, D.; Aalhus, J. L. Effects of novel nitrite packaging film on the bacterial growth of bison strip-loin steaks. Journal of Food Processing and Preservation, 41:e13311 (2017). https://doi.org/10.1111/jfpp.13311

Zhang, H.; Aalhus, J. L.; Gariépy, C.; Uttaro, B.; López-Campos, Ó.; Prieto, N.; Dugan, M. E. R.; Jin, Y. and Juárez, M. Effects of pork differentiation strategies in Canada on pig performance and carcass characteristics. Canadian Journal of Animal Science, 96 (4): 512-523 (2016). https://doi.org/10.1139/cjas-2015-0197

Soladoye, O.P.; López Campos, Ó.; Aalhus, J.L.; Gariépy, C. Shand, P. and Juárez, M. Accuracy of Dual Energy X-ray Absorptiometry (DXA) in assessing carcass composition from different pig populations. Meat Science, 121: 310-316 (2016). https://doi.org/10.1016/j.meatsci.2016.06.031

Juárez, M.; Basarab, J. A.; Baron, Vern S.; Valera, M.; López-Campos, Ó.; Larsen, I. L. and Aalhus, J. L. Relative contribution of electrical stimulation to beef tenderness compared to other production factors. Canadian Journal of Animal Science, 96 (2): 104-107 (2016). https://doi.org/10.1139/cjas-2015-0041

Ding, C.; Rodas-González, A. R.; López-Campos, Ó.; Galbraith, J.; Juárez, M.; Larsen, I.L.; Jin, Y. and Aalhus, J.L. Effects of electrical stimulation on meat quality of Bison strip-loin steaks and ground patties. Canadian Journal of Animal Science, 96 (1): 79-89 (2016). https://doi.org/10.1139/cjas-2015-0001

Prieto, N.; Juárez, M.; Larsen, I. L.; López-Campos, Ó.; Zijlstra, R. T. and Aalhus, J. L. Rapid authentication of enhanced quality pork by visible and near infrared spectroscopy. Meat Science, 110: 76-84 (2015). https://doi.org/10.1016/j.meatsci.2015.07.006

Turner, T. D.; Meadus, W. J.; Mapiye, C.; Vahmani, P.; López-Campos, Ó.; Duff, P.; Rolland, D. C.; Church, J. S.; Kramer, J. K. G. and Dugan, M. E. R. Isolation of α-linolenic acid biohydrogenation products by combined Ag+-SPE/Ag+-HPLC. Journal of Chromatography,B: Analytical Technologies in the Biomedical and Life Sciences, 980: 34-40 (2015). https://doi.org/10.1016/j.jchromb.2014.11.038

Books or book chapters

Juárez, M.; López Campos, Ó.; Prieto, N.; Roberts, J. C.; Galbraith, J.; Failla, S.; Aalhus, J. L. (2019) “Carcass characteristics and meat quality of bison, buffalo, and yak”. In: More than Beef, Pork and Chicken – The production, processing and quality traits of other sources of meat for human diet. José Manuel Lorenzo, Paul Munekataa, Francisco Jose Barba, Fidel Toldrá. Springer International Publishing, Springer Nature Switzerland AG, Cham, Switzerland. Chapter 5, pp. 95-118. ISBN 978-3-030-05483-0. https://doi.org/10.1007/978-3-030-05484-7

López Campos, Ó. (2017). “Quality assurance schemes in major beef-producing countries: Canada”. In: New Aspects of Meat Quality Aspects: From Genes to Ethics, Peter Purslow (ed.).Woodhead Publishing Series in Food Science, Technology and Nutrition, Duxford, UK. Chapter 10, pp. 228-232. ISBN: 978-0-08-100593-4. https://doi.org/10.1016/B978-0-08-100593-4.00011-4


  • Faculty of Agricultural and Food Sciences, University of Manitoba, Adjunct Professor.
  • Canadian Journal of Animal Science, Associate Editor.
  • Canadian Meat Science Association (CMSA), Secretary Treasurer.



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