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Large or Food Animal and Equine Medicine Commons™
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Full-Text Articles in Large or Food Animal and Equine Medicine
The Effects Of Artificial Insemination On Beef Cattle In The United States, Allee R. Sweeten, Abigail Shelnut, Madison Dickey
The Effects Of Artificial Insemination On Beef Cattle In The United States, Allee R. Sweeten, Abigail Shelnut, Madison Dickey
ATU Research Symposium
Artificial insemination (AI) is a reproductive procedure widely used in cattle industries and other livestock to increase pregnancy rates. Breeders must wait until the animals are in the estrus part of their estrous cycle to AI. Estrus synchronization is utilized to manipulate the estrous cycle to go into estrus or standing heat. AI is conducted by loading a semen straw into an inseminating gun, inserting the gun into the vagina of the heifer, and making sure it gets past the cervix by palpating with the other hand. Once past the cervix, the semen can be distributed in the heifer. AI …
Evaluating Colostrum Quality With Niacin Supplementation In The Diet Of Dairy Cattle, Allison Marie Pike
Evaluating Colostrum Quality With Niacin Supplementation In The Diet Of Dairy Cattle, Allison Marie Pike
Student Research Projects
Dairy calves are born with a naive immune system, and must obtain passive immunity through ingestion of colostrum. Colostrum provides the newborn with antimicrobial proteins called immunoglobulins, such as immunoglobulin G (IgG), that protect the calf for the first few weeks of life. Calves that receive good quality colostrum (>50 g/L of IgG) are more likely to survive to adulthood. Niacin is a vasodilator that may increase blood flow to the mammary gland during production of colostrum in the mother. This experiment investigated the effect of niacin supplementation at a rate of 48 g/cow/day for 3 weeks before calving …