Bibliografías temáticas / Welsh lamb

Literatura académica sobre el tema "Welsh lamb"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 10 de febrero de 2022

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Artículos de revistas sobre el tema "Welsh lamb"

1

Zalick, N. "The Welsh lamb premium scheme in practice". BSAP Occasional Publication 17 (enero de 1993): 73–76. http://dx.doi.org/10.1017/s0263967x00001336.

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AbstractThe topography and climate of Wales dictate that there is no realistic alternative to livestock production; sheep rearing is a virtual necessity. The output value of the Welsh sheep industry, with approximately 5.5 million breeding ewes, is well in excess of £200 million.Welsh Lamb Enterprise (WLE) was established in 1982 by a group of lamb producers in Wales who recognized the importance of efficient promotion and marketing. In 1985, WLE launched a Quality Assurance Scheme to identify Premium Quality Welsh Lamb, and to ensure a regular supply of Welsh lamb that was guaranteed to be of a consistently high specification. In setting up the scheme, there was close co-operation with Food From Britain to ensure that it had a meaningful standard.All participating abattoirs have to comply with strict regulations and undergo rigid independent inspections. Only lean carcasses of the highest quality are given the stamp of approval. Under WLE specifications, Premium Quality Welsh lambs must not be above fat class 3L and have conformation levels of E, U and R. Certified carcasses are clearly identified, and retail packs of fresh, chilled meat must carry a ‘use by’ date and full instructions for domestic storage. A network of wholesalers has been established so that orders for Premium Quality Welsh Lamb may be processed rapidly for immediate delivery anywhere in England and Wales.During its first year of operation, approximately 67 000 lambs were accepted into the Quality Assurance Scheme; currently, the number is closer to 500 000.
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2

Aslaminejad, A. A., R. M. Lewis, J. A. Roden y V. R. Fowler. "The CAMDA sheep breeding scheme: I. Estimation of genetic parameters for 18-week weight". Proceedings of the British Society of Animal Science 1999 (1999): 119. http://dx.doi.org/10.1017/s175275620000274x.

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The CAMDA group breeding scheme was established in 1976. Its objective is to increase lamb growth rate, mature size and maternal ability of the Welsh Mountain sheep while retaining their hardiness and breed type. The opportunity to achieve this goal depends on the extent of genetic variation within the breed for these traits. The objective of this study was to estimate the amount of variation in 18-week live weight attributable to the lamb genotype (direct) and dam maternal ability, both genetic and environmental, in Welsh Mountain sheep within this scheme.A total of 12954 records of 18-week live weight of Welsh Mountain lambs collected between 1976 and 1995 from 4 flocks of the CAMDA scheme were considered. The data were edited for small contemporary groups and for incomplete performance or pedigree recording.
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3

Guy, D. R., D. Croston, D. W. Jones, G. L. Williams y N. D. Cameron. "Response to selection in welsh mountain sheep". Proceedings of the British Society of Animal Production (1972) 1986 (marzo de 1986): 29. http://dx.doi.org/10.1017/s0308229600015403.

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In 1976, ten members of the Welsh Mountain Breed Society, established Camda Cynwyd Ltd as a co-operative society. The stated aim is to breed slightly bigger Welsh Mountain ewes that lamb easily and rear heavier lambs whilst retaining the hardiness and other beneficial traits of the breed.A nucleus flock of 150 ewes was created in 1976 with the more productive ewes out of each member's MLC recorded flock. Camda hired facilities for keeping and recording the nucleus flock at the ABRO hill farm, Rhydglafes, North Wales for six years. Anticipating the disposal of the ABRO farm by the AFRC in 1984, a lease was obtained on a 340 acre hill farm at Cernioge Mawr, Pentrefoeias, and the flock transferred there during the summer and autumn of 1982. Each year, fifty high performance, mature ewes (immigrants) were introduced to the nucleus from members flocks, until 1984 when it was closed.
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McLean, B. M. L., O. D. Davies y D. E. Evans. "Improving lamb performance from Welsh Mountain Sheep breeding groups". Proceedings of the British Society of Animal Science 2001 (2001): 223. http://dx.doi.org/10.1017/s1752756200006050.

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Sheep group breeding schemes have gained in popularity in recent years. The objectives of group breeding schemes are to improve desirable traits such as carcass conformation, weight and maternal ability whilst maintaining local type. However, if group breeding schemes were to work together then a larger genetic pool of performance recorded animals would be available to facilitate improvements. The objectives of this project were therefore twofold, 1.) was to improve traits such as weight and carcass conformation and 2.) to demonstrate the benefits of cooperative groups working together. In this project, group breeding schemes from North and Mid Wales have been working together with ram performance testing groups from North, South and Mid Wales to improve results from Welsh Mountain breeding schemes.
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Aslaminejad, A. A., R. M. Lewis, J. A. Roden y V. R. Fowler. "The CAMDA sheep breeding scheme: II. Genetic progress over twenty years". Proceedings of the British Society of Animal Science 1999 (1999): 120. http://dx.doi.org/10.1017/s1752756200002751.

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Two aspects of the CAMDA group breeding scheme is to improve lamb growth rate and the mothering ability of Welsh Mountain sheep. Genetic variation for these traits is present (Aslaminejadet al., 1999) but the rate of genetic progress depends on the selection decisions made within the scheme. The objective of this study was to estimate the genetic gain achieved in the nucleus and members’ flocks over the 20 years since the scheme began.A total of 31887 records of 12 and 18-week live weight of Welsh Mountain lambs collected between 1976 and 1995 in 7 flocks of the CAMDA scheme were used in this study. Each flock was analysed separately fitting a univariate animal model with a direct and maternal random genetic effect. Genetic parameters were estimated using a derivative-free restricted maximum likelihood algorithm (DFREML; Meyer, 1993).
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6

Wiener, G., J. A. Woolliams, Carol Woolliams y A. C. Field. "Genetic selection to produce lines of sheep differing in plasma copper concentrations". Animal Science 40, n.º 3 (junio de 1985): 465–73. http://dx.doi.org/10.1017/s0003356100040150.

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ABSTRACTMale lambs were selected annually at 18 and 24 weeks of age for high or low concentrations of copper in plasma to produce two closed lines. The difference between the high and low lines increased to approx. 0·5 mg/1 after 5 years when the experiment ended, indicating appreciable additive genetic variation for the concentration of Cu in plasma. The selection lines were derived from a population of Scottish Blackface × Welsh Mountain crosses which had been interbred for many generations. The two parental breeds contributing to the cross normally differ in a number of aspects of Cu status with that of the Welsh higher than that of the Blackface. Both pure breeds were kept as controls. In the final year, Cu concentrations of the high selection line exceeded the values of the Welsh and the low selection line had values below those of the Blackface. Differences between the selection lines persisted at all ages.There were indications of changes in the frequency of the Hb alleles, associated with the selection for Cu concentrations, but there were no correlated changes in body weight, reproductive performance or lamb mortality during the 5-year selection period when dietary supplies of Cu were not particularly restrictive.
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7

FRASER, M. D., H. R. FLEMING, V. J. THEOBALD y J. M. MOORBY. "Effect of breed and pasture type on methane emissions from weaned lambs offered fresh forage". Journal of Agricultural Science 153, n.º 6 (22 de junio de 2015): 1128–34. http://dx.doi.org/10.1017/s0021859615000544.

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SUMMARYTo investigate the extent to which enteric methane (CH4) emissions from growing lambs are explained by simple body weight and diet characteristics, a 2 × 2 Latin square changeover design experiment was carried out using two sheep breeds and two fresh pasture types. Weaned lambs of two contrasting breed types were used: Welsh Mountain (WM, a small, hardy hill breed) and Welsh Mule × Texel (TexX, prime lamb) (n = 8 per breed). The lambs were zero-grazed on material cut from recently reseeded perennial ryegrass and extensively managed permanent pasture. In each experimental period, individual ad libitum dry matter intake (DMI) was determined indoors following an adaptation period of 2 weeks, and CH4 emissions were measured individually in open-circuit respiration chambers over a period of 3 days. Although total daily CH4 emissions were lower for the WM lambs than for the TexX lambs (13·3 v. 15·7 g/day, respectively) when offered fresh forage, the yield of CH4 per unit DMI was similar for the two breed types (16·4 v. 17·7 g CH4/kg DMI). Total output of CH4 per day was higher when lambs were offered ryegrass compared with permanent pasture (16·1 v. 12·9 g/day, respectively), which was probably driven by differences in DMI (986 v. 732 g/day). Methane emissions per unit DMI (16·4 v. 17·7 g CH4/kg DMI) and proportion of gross energy intake excreted as CH4 (0·052 v. 0·056 MJ/MJ) were both higher on the permanent pasture. No forage × breed type interactions were identified. The results indicate that forage type had a greater impact than breed type on CH4 emissions from growing weaned lambs. It can be concluded that when calculating CH4 emissions for inventory purposes, it is more important to know what forages growing lambs are consuming than to know what breeds they are.
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8

Stone, C. R. y M. Appleton. "Energy and protein supplementation for shorn in-lamb ewes fed silage". Proceedings of the British Society of Animal Production (1972) 1986 (marzo de 1986): 75. http://dx.doi.org/10.1017/s0308229600015841.

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Increased food intake of ewes has been noted at experimental and research centres as a consequence of shearing in mid-pregnancy (Great House EHF, 1972/3, Drayton EHF, 1976, 1977, Grassland Research Institute 1976). This should allow a greater reliance on cheaper home-grown forage to supply nutrients during the latter stages of pregnancy. Silage alone or with small amounts of energy and/or protein supplementary feed, may provide the nutrients to support shorn in-lamb ewes through to lambing.One hundred and four shorn Border Leicester x Welsh Mountain ewes, penned in groups of 26, were offered silage ad libitum from housing in mid-January until lambing in early April. Six weeks before lambing, supplements were introduced. The treatments were either no supplement (Nil), rolled barley (B), white fishmeal (FM) or rolled barley plus white fishmeal (B + FM).
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9

Alexander, G., D. Stevens y LR Bradley. "Distribution of field birth-sites of lambing ewes". Australian Journal of Experimental Agriculture 30, n.º 6 (1990): 759. http://dx.doi.org/10.1071/ea9900759.

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This paper reports on birth-site distribution of Merinos and some British breeds in 34 lambing paddocks in a major study over 5 lambing seasons at Armidale New South Wales, and in minor studies during single lambing seasons, 2 in New South Wales and 3 in the United Kingdom. The observed distribution of birth-sites is related to topographic and other environmental features of the paddocks. In level, or nearly level paddocks, Merinos tended to lamb in a random pattern, but in sloping paddocks their birth-sites were consistently aggregated in the areas of greatest elevation. British breeds (Suffolks and Cheviots in New South Wales, and Welsh Mountain, Scottish Blackface, North Country Cheviots and Greyface in the United Kingdom) showed a pronounced tendency to lamb near the margins of paddocks, and a less marked preference for an elevated site. It is suggested that lamb mortality could be significantly reduced by the use of paddocks that provide shelter at preferred elevated positions, or along and within the paddock margins.
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10

Saatci, M., I. Ap Dewi y Z. Ulutas. "Variance components due to direct and maternal effects and estimation of breeding values for 12-week weight of Welsh Mountain lambs". Animal Science 69, n.º 2 (octubre de 1999): 345–52. http://dx.doi.org/10.1017/s1357729800050918.

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AbstractThe purpose of this study was to examine the importance of the genetic and maternal environmental factors influencing the 12-week weight (12WW) of Welsh Mountain lambs and to estimate genetic parameters for this trait. Records of 8880 Welsh Mountain lambs born between 1979 and 1995 were analysed. The records were from the nucleus flock of the CAMDA cooperative breeding group. In this flock selection of replacements had been based on a multi-trait index incorporating lamb growth and maternal ability as important objectives and 12WW as one of the selection criteria. Twelve models were examined, all including direct additive genetic variance and various combinations of genetic and environmental maternal effects. The most appropriate model was chosen based on log-likelihood ratio tests. It included appropriate fixed effects, and direct additive, maternal additive, maternal permanent environment and maternal common environment (litter) random effects that defined proportionally 0⋅21 (h2), 0⋅09 (m2), 0⋅06 (pe2) and 0⋅18 (ce2) of the phenotypic variance. Ignoring the additive maternal effect resulted in inflated estimates of direct heritability and ignoring the environmental effects associated with dam inflated the direct and maternal heritabilities. There was no correlation (P < 0⋅05) between the additive direct and additive maternal effects. Additive direct and maternal breeding values increased by 0⋅12 (s.e. 0⋅006) kg/year and 0Ό3 (s.e. 0⋅003) kg/year respectively. The results demonstrate the effective incorporation of selection index methodology in the context of a hill sheep flock and also the importance of several categories of maternal effects.
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Tesis sobre el tema "Welsh lamb"

1

Williams, Rachael M. "Do geographical indications promote sustainable rural development? : two UK case studies and implications for New Zealand rural development policy". Lincoln University, 2007. http://hdl.handle.net/10182/585.

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Geographical indications (GIs) are one form of protective labelling used to indicate the origin of food and alcohol products. The role of protected geographical indicators as a promising sustainable rural development tool is the basis for this research. The protection of geographical indications is a rather controversial subject and much research is still required for both sides of the debate. The research method employed for this study is qualitative critical social science. Two Case studies are used to investigate the benefits brought to rural areas through the protection of GIs. The case studies include the GIs Jersey Royal and Welsh Lamb both from the United Kingdom a member of the European Union (the EU is in favour of extended protection of GIs for all agro-food products under the 1994 WTO/TRIPS agreement on geographical indications). Twenty-five indepth interviews were conducted for this study the duration of the interviews was approximately one hour. The study identifies predominantly indirect links between GIs and sustainable rural development, through economic and social benefits bought to rural areas by the GIs investigated - less of a connection was found to ecological elements. No considerable cost for GI protection was discovered. This finding suggests that GIs are worthwhile for implementation in New Zealand as a rural development tool.
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Libros sobre el tema "Welsh lamb"

1

Lamb, leeks, and laverbread: The best of Welsh cookery. London: Grafton Books, 1989.

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2

Group, Welsh Lamb and Beef Industry Working. The Welsh lamb & beef sector: A strategic action plan. Wales]: Agri-Food Partnership, 1999.

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3

Partnership, Agri-Food. Welsh Agri-Food action plans for the lamb & beef, dairy, and organic sectors: An executive summary report = Cynlluniau gweithredu Bwyd-Amaeth Cymreig ar gyfer y sector cig oen a chig eidion, y sector cynnyrch llaeth a'r sector orgainig : adroddiad crynodeb gweithredol. Wales]: Agri-Food Partnership, 1999.

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4

Caroline, Zilboorg y Graves Robert 1895-, eds. Sergeant Lamb of the Ninth: And, Proceed, Sergeant Lamb. Manchester [England]: Carcanet, 1999.

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5

Robert, Graves. Las aventuras del Sargento Lamb. Barcelona: EDHASA, 1985.

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Robert, Graves. Sergeant Lamb of the Ninth. London: Hutchinson, 1985.

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7

Lewis, Siân. Oen bach ar goll. Aberystwyth: Cymdeithas Lyfrau Ceredigion, 2001.

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8

Brown, Richard, Kate Ruttle y Jean Glasberg. Welsh Lamb. University of Cambridge ESOL Examinations, 1996.

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9

(Illustrator), Patricia Ludlow, ed. A Welsh Lamb. Cambridge University Press, 1998.

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10

Jones, Huw y Gilli Davies. The Welsh Lamb Cookbook. Graffeg, 2018.

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Capítulos de libros sobre el tema "Welsh lamb"

1

Highley, Christopher. "‘The lost British lamb’: Religion and National Identity among English, Welsh, and Scottish Catholics 1". En Catholics Writing the Nation in Early Modern Britain and Ireland, 80–117. Oxford University Press, 2008. http://dx.doi.org/10.1093/acprof:oso/9780199533404.003.0004.

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Hurl-Eamon, Jennine y Lynn MacKay. "Roger Lamb, Memoir of His Own Life, by R. Lamb; Serjeant in the Royal Welch Fuzileers (Dublin: Printed by J. Jones, 1811), PP. 6–7, 14–15, 61, 66–71, 74–5, 108–10, 182–3, 189, 242–5, 289." En Women, Families and the British Army 1700-1880, 185–93. Routledge, 2020. http://dx.doi.org/10.4324/9781003011484-32.

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