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Eduardo de Souza Ribeiro


Position/Title: Assistant Professor
email: eribeiro@uoguelph.ca
Phone: (519) 824-4120 Ext. 56516
Office: ANNU 137

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Meet Eduardo ( 60 second OAC video )

Eduardo de Souza Ribeiro is originally from São Joaquim-SC, a small agricultural town located in southern Brazil. He grew up on a family farm, where his interest in food animals and agriculture began. In 2004, he started his studies in the School of Veterinary Medicine at Santa Catarina State University. During his undergraduate studies, he was actively involved with research in embryology and developed a passion for science and reproductive biology. In 2009, he was accepted into the graduate program of the Department of Animal Sciences at University of Florida. His master’s thesis focused on reproductive physiology and management of lactating dairy cows. Upon completion of his M.Sc. degree in 2011, he started a Ph.D. in Animal Molecular and Cellular Biology at University of Florida, which was completed in 2015. His doctoral dissertation focused on molecular features in the ovary and pregnant uterus associated with fertility in dairy cattle. In January of 2016, he joined the Department of Animal Biosciences at the University of Guelph as Assistant Professor in Reproductive Physiology.

Academic History

  • Bachelor in Veterinary Medicine, Santa Catarina State University, Brazil (2008)
  • Master of Science in Animal Sciences, University of Florida, USA (2011)
  • Doctor of Philosophy in Animal Molecular and Cellular Biology, University of Florida, USA (2015)

Affiliations and Partnerships

  • American Dairy Science Association
  • Society for the Study of Reproduction
  • Dairy Cattle Reproduction Council
  • Sigma Xi Scientific Research Society

Awards and Honours

  • Sigma Xi Graduate Research Award (2016)
  • Award of Excellence for Graduate Research presented by the Institute of Food and Agricultural Sciences, University of Florida (2015)
  • Richard M. Hoyt Memorial Award presented by the National Milk Producers Federation and American Dairy Science Association (2014)

Research Impact

Using a holistic approach that combines state-of-the-art basic science with applied research, Eduardo’s research examines the problem of infertility in cattle at all levels of organization, from farm enterprise to cow to tissue to cell to gene. His research has improved our understanding of the molecular control of embryonic development in the cow, pinpointed postpartum diseases and anovulation as major causes of the infertility plaguing dairy cattle throughout the world, established target supplementation of somatotropin as a strategy to improve embryonic survival in lactating dairy cows, and tested novel reproductive programs for dairy herds. Current research projects in Eduardo’s laboratory continue to investigate key events in reproductive biology that ultimately determine the success of pregnancy establishment and survival to term, and to develop strategies to improve reproductive efficiency and sustainability in food animal production.

Current Research Projects

Role of endometrial lipids in elongation and survival of the preimplantation conceptus
Elongation of the preimplantation conceptus is a prerequisite for successful pregnancy in cattle and depends on histotroph secretion by the endometrium. The uterine histotroph is rich in lipids and significant changes in gene expression of conceptus cells during elongation are likely coordinated by these lipids through activation of transcription factors and cell signalling. This project aims to investigate the profile of lipids in the endometrium at the time of elongation and its importance for histotroph composition and conceptus development. Results are expected to contribute to our understanding of preimplantation conceptus development and survival in lactating dairy cows, and to allow the development of nutraceutical strategies to improve reproductive efficiency in cattle.

Short- and long-term consequences of inflammation on nutrient partition, lactation and reproductive performance in dairy cattle
Inflammation is prevalent in dairy cows during the transition from pregnancy to lactation, and is caused mainly by metabolic disorders and microorganism infections. This project aims to understand how nutrient partition is altered by inflammation and to investigate the short- and long-term consequences of inflammation for the biology of lactation, ovary and uterus. The results are expected to help us understand how inflammation reduces lactation and reproductive performance, and to contribute to the development of strategies to minimize these losses.  

Economics of reproductive technologies applied to cattle herds
Technologies for animal breeding are constantly being developed or upgraded. Eduardo’s research group evaluates the implementation of available technologies into the breeding programs of commercial herds and their impact on reproductive efficiency, production, genetics, costs, and overall profitability according to multiple scenarios. Comprehensive analyses of the results are used to make educated recommendations to producers, to understand the current needs of the industry, and to design new technologies or scientific questions that will help the industry to move forward.

Graduate Student Information

Students in Eduardo’s research group are expected to work as a team and to take advantage of the wide range of research topics in his program. Students have the opportunity to learn and to gain experience in many aspects of reproductive biology and animal production, ranging from molecular work in the laboratory to applied research in commercial herds and interaction with producers and industry partners. Eduardo maintains an environment of open communication and constant mentorship with his students. He plays an active role during early stages of training and expects greater independence and critical thinking during the progression of the program. The academic training emphasizes learning of scientific methods and statistics, and students are expected to publish their research findings in scientific journals and to present the results at scientific meetings and extension events.

Featured Publications

  • Ribeiro et al. (2016) Role of lipids on elongation of the preimplantation conceptus in ruminants. Reproduction 152:R115-126.
  • Ribeiro et al. (2016) Biology of preimplantation conceptus at the onset of elongation in dairy cows. Biol. Reprod. 94(4):97, 1-18.
  • Ribeiro et al. (2016) Carryover impact of postpartum inflammatory diseases on developmental biology and fertility in dairy cows. J. Dairy Sci. 99:2201-2220.
  • Ribeiro et al. (2016) Conceptus development and transcriptome at preimplantation stages in lactating dairy cows of distinct genetic groups and estrous cyclicity statuses. J. Dairy Sci. 99:4761-4777.
  • Ribeiro et al. (2014) Low doses of bovine somatotropin enhance conceptus development and fertility in lactating dairy cows. Biol. Reprod. 90(1):1-12.

For a full list of Eduardo’s publications, please visit his Google Scholar page.