This article written by Dr. Reynold Bergen, BCRC Science Director, originally appeared in the March 2022 issue of Canadian Cattlemen magazine and is reprinted on the BCRC Blog with permission of the publisher.
Last month’s column profiled a beef cow productivity study that coincided with the massive 2001-02 drought that impacted most of Western Canada. That study got less attention than it deserved, because Canada’s entire beef industry became preoccupied with BSE in 2003. But research is an investment, and the lessons learned from research done two decades ago are still paying dividends today. This month’s column focuses on what that study learned about reproductive performance.
What They Did:
Dr. Cheryl Waldner and her colleagues from the Western College of Veterinary Medicine examined factors affecting the productivity of over 30,000 beef cows in more than 200 well-managed herds across Alberta, Saskatchewan and the Peace Region of B.C. Participating producers individually identified each cow and calf, recorded all calf births, maintained an active veterinary-client-patient relationship, had good animal handling facilities, pregnancy tested all breeding females, had a veterinarian evaluate all herd bulls, had an established spring or summer breeding season (i.e., didn’t calve year-round), and worked with the researchers to collect the needed samples and data. These results have been published in Theriogenology 79:1083-1094, Theriogenology 81:840-848 and Livestock Science 163:126-139.
What They Learned:
This spring’s calving records can help identify cows that are less likely to rebreed successfully or more likely to have problems next spring. Continue reading