Search Results - "Wathes, D.C"

An empirical analysis of the cost of rearing dairy heifers from birth to first calving and the time taken to repay these costs by Boulton, A. C., Rushton, J., Wathes, D. C.

“…Rearing quality dairy heifers is essential to maintain herds by replacing culled cows. Information on the key factors influencing the cost of rearing under…”
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A survey of calf management practices and farmer perceptions of calf housing in UK dairy herds by Mahendran, S.A., Wathes, D.C., Booth, R.E., Blackie, N.

“…Adoption of optimal management techniques for rearing dairy calves has significant effects on their health, welfare, and productivity. Despite much published…”
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Influence of negative energy balance on cyclicity and fertility in the high producing dairy cow by Wathes, D.C., Fenwick, M., Cheng, Z., Bourne, N., Llewellyn, S., Morris, D.G., Kenny, D., Murphy, J., Fitzpatrick, R.

“…The peripartum period is of critical importance to subsequent health and fertility. Most cows enter a state of negative energy balance (NEB) associated with…”
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Differences between primiparous and multiparous dairy cows in the inter-relationships between metabolic traits, milk yield and body condition score in the periparturient period by Wathes, D.C., Cheng, Z., Bourne, N., Taylor, V.J., Coffey, M.P., Brotherstone, S.

“…During the early postpartum period dairy cows mobilize fat and muscle to support lactation. This is associated with alterations in blood metabolite and hormone…”
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A descriptive study of the survival of Holstein-Friesian heifers through to third calving on English dairy farms by Brickell, J S, Wathes, D C

“…A short herd lifespan severely limits opportunities for on-farm selection of breeding cows in addition to causing financial losses on dairy farms and…”
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Heifer fertility and carry over consequences for life time production in dairy and beef cattle by Wathes, D. C., Pollott, G. E., Johnson, K. F., Richardson, H., Cooke, J. S.

“…The rearing period has a key influence on the later performance of cattle, affecting future fertility and longevity. Producers usually aim to breed replacement…”
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Analysis of pre-weaning feeding policies and other risk factors influencing growth rates in calves on 11 commercial dairy farms by Johnson, K. F., Chancellor, N., Burn, C. C., Wathes, D. C.

“…Growth rates in pre-weaned calves influence their health, age at first calving and lifetime productivity. Many farms restrict milk rations to encourage solid…”
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Mortality in Holstein-Friesian calves and replacement heifers, in relation to body weight and IGF-I concentration, on 19 farms in England by Brickell, J. S., McGowan, M. M., Pfeiffer, D. U., Wathes, D. C.

“…The incidence of mortality and culling in Holstein-Friesian heifers from birth through first calving was determined on 19 dairy farms selected from across…”
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Evidence that leptin genotype is associated with fertility, growth, and milk production in Holstein cows by Clempson, A M, Pollott, G E, Brickell, J S, Bourne, N E, Munce, N, Wathes, D C

“…This study investigated associations between single nucleotide polymorphisms (SNP) in the leptin, leptin receptor, and neuropeptide Y (NPY) genes with growth,…”
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Between- and within-herd variation in blood and milk biomarkers in Holstein cows in early lactation by Krogh, M A, Hostens, M, Salavati, M, Grelet, C, Sorensen, M T, Wathes, D C, Ferris, C P, Marchitelli, C, Signorelli, F, Napolitano, F, Becker, F, Larsen, T, Matthews, E, Carter, F, Vanlierde, A, Opsomer, G, Gengler, N, Dehareng, F, Crowe, M A, Ingvartsen, K L, Foldager, L

“…Both blood- and milk-based biomarkers have been analysed for decades in research settings, although often only in one herd, and without focus on the variation…”
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The role of endocrine insulin-like growth factor-I (IGF-I) in female bovine reproduction by Velazquez, M.A., Spicer, L.J., Wathes, D.C.

“…Insulin-like growth factor-I (IGF-I) plays a pivotal role in cattle fertility, acting as a monitoring signal that allows reproductive events to occur when…”
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Influence of the dam and sire on size at birth and subsequent growth, milk production and fertility in dairy heifers by Swali, A., Wathes, D.C.

“…Genetic selection has resulted in larger cows with high milk production potential but a tendency for poor fertility. In multiparous cows fetal development…”
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Effect of level of dietary n-3 polyunsaturated fatty acid supplementation on systemic and tissue fatty acid concentrations and on selected reproductive variables in cattle by Childs, S., Hennessy, A.A., Sreenan, J.M., Wathes, D.C., Cheng, Z., Stanton, C., Diskin, M.G., Kenny, D.A.

“…Reproductively normal crossbred beef heifers were individually offered a diet of barley straw and concentrate supplemented with one of four levels of a fish…”
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Effect of oleic acid supplementation on prostaglandin production in maternal endometrial and fetal allantochorion cells isolated from late gestation ewes by Cheng, Z, Abayasekara, D.R.E, Elmes, M, Kirkup, S, Wathes, D.C

“…Abstract Introduction Elevated circulating non-esterified fatty acids including oleic acid (OA) are associated with many pregnancy related complications…”
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Factors influencing heifer survival and fertility on commercial dairy farms by Wathes, D. C., Brickell, J. S., Bourne, N. E., Swali, A., Cheng, Z.

“…The average dairy cow survives only three lactations, reducing the availability of replacement heifers. Prenatal losses occur due to early embryonic mortality…”
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Intracervical application of hyaluronan improves cervical relaxation in the ewe by Perry, K., Haresign, W., Wathes, D.C., Khalid, M.

“…Artificial insemination (AI) using frozen semen is a key method to enable rapid genetic improvement but its use in the sheep industry is currently limited by…”
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Multiple correlation analyses of metabolic and endocrine profiles with fertility in primiparous and multiparous cows by Wathes, D C, Bourne, N, Cheng, Z, Mann, G E, Taylor, V J, Coffey, M P

“…Results from 4 studies were combined (representing a total of 500 lactations) to investigate the relationships between metabolic parameters and fertility in…”
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Effect of management factors and blood metabolites during the rearing period on growth in dairy heifers on UK farms by Brickell, J.S., McGowan, M.M., Wathes, D.C.

“…Growth rates during rearing affect the age and body weight (BW) of replacement heifers at first calving. Diet and disease can affect growth via altered…”
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Effect of milking frequency and diet on milk production, energy balance, and reproduction in dairy cows by Patton, J, Kenny, D A, Mee, J F, O'Mara, F P, Wathes, D C, Cook, M, Murphy, J J

“…The objective of this study was to determine the effects of reduced milking frequency and increased dietary energy density in early lactation on milk…”
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A method for isolating and culturing placental cells from failed early equine pregnancies by Rose, B.V, Cabrera-Sharp, V, Firth, M.J, Barrelet, F.E, Bate, S, Cameron, I.J, Crabtree, J.R, Crowhurst, J, McGladdery, A.J, Neal, H, Pynn, J, Pynn, O.D, Smith, C, Wise, Z, Verheyen, K.L.P, Wathes, D.C, de Mestre, A.M

“…Abstract Early pregnancy loss occurs in 6–10% of equine pregnancies making it the main cause of reproductive wastage. Despite this, reasons for the losses are…”
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