Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 29 for “"Beef calves"”.
-
Evaluation of Weaning Stress in Beef Calves
Conventional techniques within the beef cattle industry involve weaning the calf from the dam when the calf is about 205 days of age. Weaning induces a stress-response that is implicated in reducing the health and productivity of newly weaned calves. Our goal was to evaluate the impact of weaning …
-
Copper supplementation and monocyte function in growing beef calves
… status and monocyte function were evaluated in beef calves supplemented with Cu over a 2 year study period. Fifty-four weaned calves were allotted to one of three Cu treatment groups in a 150 d feeding trial, Plasma Cu concentration was increased in CuLy-supplemented calves over controls and …
-
Methods to Reducing Weaning Stress in Early Weaned Spring Beef Calves
<p>Reducing weaning stress in beef calves can have dramatic benefits to the health, growth, and performance to beef calves post-weaning. Studies have shown that providing creep feed to calves during the pre-weaning period can improve their nutritional status, which can better prepare them for the …
-
Some factors affecting weaning weights and weaning scores in beef calves
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Animal Husbandry, 1957
-
Effect of age on the accuracy of selection among beef calves for growth rate and type
… calf crops born from 1950 through 1958 at the Beef (Battle Research Station, Front Royal, Virginia. These included 556 Angus, 556 Hereford, and 590 Shorthorn calves.
-
Increases in Cortisol due to Weaning Stress and the Subsequent Alterations to Immune Function in Beef Calves
… between 6 and 8 months and occurs rapidly. Calves that are abruptly separated from their dam respond with increased vocalization and walking, and decreased eating and resting. The psychological stress the calf undergoes during weaning causes elevated glucocorticoid and catecholamine hormone …
-
The effect of supplementation strategy, stress level, and tall fescue type on performance of fall-weaned beef calves
The beef cattle marketing structure imposes stress on calves due to weaning, transport, commingling, and adaptation to new diets, resulting in a weakened immune systems at the height of disease risk, frequently causing bovine respiratory disease. Backgrounding programs facilitate opportunities for …
-
Effect of Feeding Different Protein and Energy Supplements on Performance and Health of Beef Calves During the Backgrounding Period
Newly received or weaned calves are highly susceptible to the incidence of bovine respiratory disease. In addition to high levels of stress, decreased feed intake and exposure to foreign antigens result in increased morbidity and possibly death losses. Four backgrounding trials were conducted to …
-
Linear body measurements and other birth observations on beef calves as predictors of preweaning growth rate and weaning type score
… criterion for Angus and possibly Hereford calves, but not for Shorthorns, except that extremely small calves should not be kept as breeding stock. Neither body measurements nor type at birth can be recommended as selection criteria as their use would not be likely to result in an …
-
Evaluation of By-product Feedstuffs, Level of Concentrate, and Selenium and Vitamin E Injections on Performance and Health of Beef Calves in Backgrounding Systems
Weaning stress in young calves is often compounded with stress from transport, marketing, and commingling. The result is a weakened immune system, which can lead to increased incidence of diseases, especially bovine respiratory disease complex (BRDC). Backgrounding cattle post-weaning and prior to …
-
Cryptosporidium and Giardia in calves in Belgium
Cryptosporidiosis mainly occurs in calves younger than 1 month, and causes a mild to profuse diarrhea. In contrast, a Giardia infection is most frequently diagnosed in calves older than 1 month and clinical symptoms comprise a chronical and intermittent diarrhea, and ill thriving. Cattle are …
-
Effects of copper and selenium on antibody response, weight gains and blood parameters in beef calves grazing high or low endophyte (Acremonium coenophialum) tall fescue (Festuca arundinaceae, Schrep)
… Se and/or Cu was used to supplement growing beef calves (age 7 months) marginally deficient in these two trace elements and pastured on high-endophyte (HE) or low-endophyte (LE) tall fescue. The 64 calves were randomly assigned to one of eight treatment groups (HE or LE, supplemented or …
-
Bovine Coccidiosis: Dynamics of infection in grazing cattle and the potential role of stress and immunity
… of Eimeria spp. infection was highest in calves less than one year of age and subsequently decreased to stable levels in older animals. Although E. bovis was the most common species identified in calves, heifers and cows, mixed species infections dominated. Additional studies were carried …
-
Selenium supplementation and selected immune responses of beef cattle
… was evaluated in three experiments. Sixty weaned beef calves, with marginal blood Se (67 μg Se/1), were allotted to one of six Se treatment groups in a 70-day experiment. Antibody responses to lysozyme were lower in calves fed 20 ppm Se salt-mineral mixture (SMM) ad libitum as compared to calves …
-
Behavioral biomarkers for calf health
… early life behavior’s in both dairy and beef calves is important for the health, performance, and welfare of these animals. Oral behaviors early in life can affect a calf’s performance and health through adulthood. Applied ethologist utilize automated technologies to better quantify the …
-
Characterisation of physiological and immune-related biomarkers of weaning stress in beef cattle
… and psychological stressors are imposed on the beef calf causing alterations in behavioural and physiological responses. To date, few studies have examined the effect of weaning on the extended physiological and immunological responses of beef calves and cows. Furthermore, no research has …
-
Effects of Stress on Several Immune and Health Responses of Weanling Calves
… were measured in three experiments. Sixty-four beef calves from 2 sources were bled on d - 7 (pre-weaning), 0 (weaning), 7, 14, and 21 (post-weaning). Serum selenium (Se), neutrophil and lymphocyte counts, and glutathione peroxidase (GSH-Px) activity for erythrocytes and leukocytes were measured …
-
The Effects of Low Stress Cattle Handling and Weaning Training on Post-Weaning Weight Gain and Calf Activity
… assess the effect of low stress (LS) handling of beef calves on weight gain and calf activity associated with the weaning process. Cattle were of Angus and Angus cross breeding from two separate herds in Virginia. Handlers for the LS groups went through a short training session. Handlers for the …
Page 1 of 2