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BACKGROUND Mastitis, an inflammation of the mammary gland, is a major source of economic loss on dairy farms. The aim of this study was to quantify the associations between two previously identified polymorphisms in the bovine toll-like receptor 2 (TLR2) and chemokine receptor 1 (CXCR1) genes and mammary health indictor traits in (a) 246 lactating dairy cow(More)
The objectives of this study were to examine the relationships between periovulatory endocrine events, ovarian activity, and embryo survival after artificial insemination (AI) in cattle (Bos taurus). Eighty-four reproductively normal beef heifers were estrus synchronized using a prostaglandin-based regimen. Artificial insemination was performed between 5(More)
Beef heifers (n = 48) were offered, daily, a 1.5 kg ration that contained 0, 69, 138, and 275 g of ruminally protected fish oil (RPFO) fortified with vitamin E (5000 IU/kg). The fatty acid profile of neutral (NL) and polar lipids (PL) of neck muscle was analyzed by GC-FID. Minced muscle was displayed in an 80% O(2):20% CO(2) atmosphere under simulated(More)
Nutrition plays a critical role in the regulation of cow fertility. There is emerging evidence that dietary long chain n-3 polyunsaturated fatty acids (LC n-3 PUFA) may act as specific regulators of some reproductive processes. In vitro studies suggest that the n-3 PUFAs, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) may play pivotal roles by(More)
Reproductively normal crossbred beef heifers were individually offered a diet of barley straw and concentrate supplemented with one of four levels of a fish oil (FO) enriched supplement. Following oestrous cycle synchronisation, blood samples were collected at appropriate intervals for the measurement of progesterone (P(4)), oestradiol (E(2)), fatty acids,(More)
The objective of this study was to examine the effects of dietary n-3 polyunsaturated fatty acid (n-3 PUFA) supplementation on embryo yield and quality in heifers. Animals were individually offered barley straw and concentrate diets supplemented with either palmitic acid (C16:0; CON) or a partially rumen protected n-3 PUFA-enriched supplement. Following(More)
Water is ofparticular importance for tree seedlings which must survive and grow with little bufferingfrom the extremes in weather that occur near the soil sUlface. Site preparation methods are often prescribed to ameliorate expected shortages or excesses of water. In this paper, the relationships between commonly used site preparation methods and the site(More)
The mode) presented here calculates the soil water balance given input measurements or estimates of climate, soil properties, and vegetative cover conditions. The input data requirement is kept to a minimum in order to maximize the utility of the model in situations where few measurements are available. Model sensitivity to error in input values is(More)
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