Strong Academic Pedigree

Transcription

1 R Strong Academic Pedigree Reg Gomes Paul Malven Ernst Knobil Ron, the Animal Scientist Four top universities Mentor to students Colleague to many Effective leader Friend Humble Published scientific papers involving 12 different species or types within species Ron s Impact on the World Dairy Industry Ron and Jack s Happenstance, 1993 Stacy Butler and Stephanie Britt, Class of 1996 Cornell University Hotel School Amsterdam JFK Atlanta

2 Energy Balance Nadir Energy Balance and Ovulation Original graphs are Figures 4 and 5 from Butler and Smith J. Dairy Sci. 72: Peak Milk DE Intake Body Weight Ovulation Primordial pool Activated oocyte from ovarian reserve Example: How does weight loss affect fertility of a cow s eggs? Britt Hypothesis Here s what observed. Bovine Practitioner 24: 39 43, Maintained = 62% CR Lost = 25% CR Here s a diagram of our hypothesis. Microscopic size Ultrasound size Ovulation of egg Cow 1688 Cow Weight loss Environment Days Days Before or After Calving +80 Pregnancy rate per timed AI (%) 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 789 cows 25% The Britt Hypothesis: 25 years later Carvalho et al, J Dairy Science 97: , 2014 Pregnancy Rates Timed AI 675 cows 38% 423 cows 84% Lost Maintained Gained Body Condition Change During 3 Weeks Postpartum In the future: 1. Selection for cows that don t lose weight (Israel scientists, 2017) 2. Bulls will be indexed on daughter robustness (Swiss scientists, 2017) Cows of the future: Less weight loss, metabolically robust Consistent weight loss patterns M. Zachut and U. Moallem J. Dairy Sci. 100 (4) Sires differ in robustness of daughters N. T. Ha et al J. Dairy Sci. 100 (5)

3 Dietary Fat and Postpartum Follicle Growth Protein Intake and Fertility 90% 80% Heifer First Service Conception Rate 82% 25.0 PUN Concentrations (mg/dl) Prefeeding Peak 23.6 Adding fat caused more first PP follicles to ovulate. 70% 60% 50% 40% 30% 61% % 10% 5.0 0% Normal (100%) High (150%) Rumen Degradable Protein (% of recommended) 0.0 Normal (100%) High (150%) S. W. Beam and W. R. Butler Biol. Reprod. 56, C. C. Elrod and W. R. Butler J. Anim. Sci. 71: PUN and Uterine ph Impact on Students and Colleagues Butler s attention to and interest in the lives of his students led to his selection in 1997 by the CALS Alumni Association for its Outstanding Alumni Award. Animal Science at Cornell University , Observations and Reflections from an Insider. John Murray Ellioit W. R. Butler J Dairy Sci 81:

4 This Photo by Unknown Author is licensed under CC BY SA Outreach 45+ International Presentations Industry Responses to Ron s Research Milk Urea Nitrogen (MUN) is measured in milligrams per deciliter (mg/dl) i.e. grams per 100 liters This low concentration makes accurate testing for differences in urea much more difficult.. PCDART Development on..began in 1979 Over the years, DART expanded to PCDART and addressed the need for better information (reproductive/health changes, bst, prostaglandin, body condition scores, heifer growth, herd The first day of each rotation will consist of: 1) Orientation: Discuss learning objectives Provide list of reading materials: Pioneer Forage Manual: A Nutritional Guide (Yours to Keep) Working with DairyComp305 A brief primer Body Condition Scoring Body Condition Scoring Worksheet Particle Size Separator Worksheet Vaccination Program Worksheet Milk and Dairy.. Industry Responses to Ron s Research Raise your RIGHT hand if you have ever dealt with how much protein to feed to dairy cows.

5 Raise your LEFT hand Stand and Clap your hands if you have ever dealt with negative energy balance in dairy cows. if you have benefitted from the research and outreach of Ron Butler. Thank You Ron!