Reduced fertility as a result of heat stress during summer months is a significant problem to the livestock industry, and specifically to the dairy industry and the swine industry. Although losses due to postfertilization events and prefertilization events are not readily separated in an industry setting, evidence suggests that prefertilization events including reduced synthesis of molecules on the surface of the sperm and oocyte that interact with each other, leading to reduced sperm-oocyte binding and fusion during fertilization, contribute to a reduced fertilization efficiency. These prefertilization events may contribute significantly to reproductive efficiency losses during summer months and may be more economically alleviated than postfertilization losses. The research proposed here seeks to quantitatively evaluate aspects of these prefertilization losses in gamete quality in coordination with general characterization of aspects of gamete quality. Quantitative evaluation of responses to specific temperature changes will allow determination of economics of maintaining a cooler animal environment during specific production stages.
|Effective start/end date||6/1/02 → 9/30/14|
- National Science Foundation: $225,000.00