Results 61 to 70 of about 87,193 (312)

Risk factors and prevention strategies for mastitis in New Zealand dairy heifers : this thesis is completed as a partial requirement for the Masters of Veterinary Studies (Epidemiology) from Massey University, Palmerston North, New Zealand [PDF]

, 2006
The aims of this thesis were to investigate herd level risk factors for heifer clinical mastitis and to test the efficacy of a pre-calving intervention on prevalence of post-calving IMI, incidence of clinical mastitis and somatic cell count (SCC) in ...
Parker, Katrina Ivy
core  

Effects of Lycium barbarum Residue Substituting Dietary Maize on Fecal Microbiota and Growth Performance of Crossbred Simmental Cattle

Animal Research and One Health, EarlyView.
The bioactive substances we extracted from Lycium barbarum residue (LBR) have a typical polysaccharide structure. When 1.80% LBR was used to replace maize in the diet, the average daily gain of rossbred Simmental was significantly increased, and anti‐inflammatory ability was improved. In addition, LBR improved the fecal microbial composition, increased
Kun Cai, Mingtan Li, Lihang He, Ning Ma, Haoyu Liu, Chi Xu, Xianhua Wu, Zeguang Xing, Qian Xing, Yuankai Qu, Xi Ma   +10 more
wiley   +1 more source

Transition Between Mechanical and Geometric Controls in Glacier Crevassing Processes

Geophysical Research Letters
Herein, fast fracture initiation in glacier ice is modeled using a Material Point Method and a simplified constitutive law describing tensile strain softening.
Hugo Rousseau, Johan Gaume, Lars Blatny, Martin P. Lüthi   +3 more
doaj   +1 more source

Theoretical stability of ice shelf basal crevasses with a vertical temperature profile

Journal of Glaciology
Basal crevasses threaten the stability of ice shelves through the potential to form rifts and calve icebergs. Furthermore, it is important to determine the dependence of crevasse stability on temperature due to large vertical temperature variations on ...
Niall Bennet Coffey, Ching-Yao Lai, Yongji Wang, W. Roger Buck, Trystan Surawy-Stepney, Anna Elizabeth Hogg   +5 more
doaj   +1 more source

Relationship between Conception Date and Latitude in Muskoxen

Rangifer, 1997
It has been suggested that muskoxen calve earlier with increasing latitude but the available data do not seem to have been thoroughly analyzed. Therefore, estimated conception dates (K=657) from a wide range of latitudes were compared.
Peter F. Flood, Susan C. Tedesco
doaj   +1 more source

Integration of Nutrition and Organic Agriculture Framework in Managing Gastrointestinal Nematodes in Ruminants

Animal Research and One Health, EarlyView.
Gastrointestinal nematode infections damage the gastrointestinal epithelial tissues of ruminants, affecting nutrient utilization and overall production performance. This review outlines host‐gastrointestinal nematode interactions and discusses integrated control strategies, including nutritional supplementation, grazing management, vaccines, and ...
Wenxun Chen, Xiangfang Tang, Yimin Zhuang, Shengjun Zhao, Ying Ren, Xiaokang Lv   +5 more
wiley   +1 more source

Response of lacustrine glacier dynamics to atmospheric forcing in the Cordillera Darwin

Journal of Glaciology
Calving glaciers respond quickly to atmospheric variability through ice dynamic adjustment. Particularly, single weather extremes may cause changes in ice-flow velocity and terminus position.
Lukas Langhamer, Tobias Sauter, Franziska Temme, Niklas Werner, Florian Heinze, Jorge Arigony-Neto, Inti Gonzalez, Ricardo Jaña, Christoph Schneider   +8 more
doaj   +1 more source

Phenotypic effects of calving ease on the subsequent fertility and milk production of dam and calf in UK Holstein-Friesian heifers [PDF]

, 2011
The effect of calving ease on the fertility and production performance of both dam and calf was studied in approximately 50,000 and 10,000 UK Holstein-Friesian heifers and heifer calves, respectively. The first objective of this study was to estimate the
Alonso-Spilsbury, Barkema, Berry, Blair, Boksa, Brotherstone, Coffey, Davis, Dematawewa, Djemali, Dobson, Drennan, Du, Dwyer, E. Wall, Erb, Erb, Ford, Fourichon, Garnsworthy, Gilmour, Heinrichs, Hill, Hoffmann, Ingvartsen, J.A. Woolliams, Kapoor, Laster, Laster, Lombard, Lundborg, M.P. Coffey, Mangurkar, McNeil, Mee, Meijering, Pan, Peter, Pryce, R. Mrode, Rajala, Rijnkels, Rowlands, S.A.E. Eaglen, Senger, Silva, Simerl, Tenhagen, Tenhagen, Thompson, Wall, Weaver, White, Wilmink, Yoder, Zhang   +55 more
core   +1 more source

Hepatotoxicity of Nonesterified Fatty Acids to Dairy Cows: Pathophysiological Mechanisms and Prospective Solutions

Animal Research and One Health, EarlyView.
Unregulated inflammation increases non‐esterified fatty acids (NEFAs), and triggers multi‐pathway hepatocyte damage including oxidative stress, mitochondrial dysfunction, and metabolic disorders in dairy cows. ABSTRACT Circulating concentrations of nonesterified fatty acids (NEFAs) are elevated due to lipid mobilization from adipose tissue in ...
Siqing Mao, Yuan Tian, Dan Li, Lei Tian, Hang Yu, Ziling Liu, Xin Gao, Yanqiong Wen, Fachun Wan, Zuo Wang, Weijun Shen, Xinwei Li, Lei Liu   +12 more
wiley   +1 more source

Calving distribution of Alaska's Steese-Fortymile caribou herd: A case of infidelity?

Rangifer, 1986
The Steese-Fortymile caribou (Rangifer tarandus granti) herd has changed its calving distribution frequently during the past 30 years. A «traditional» calving area, used for decades, west of the Steese Highway (Preacher Creek) was abandoned after 1963 ...
Patrick Valkenburg, James L. Davis
doaj   +1 more source