Bibliografie tematiche / Sheep

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Letteratura scientifica selezionata sul tema "Sheep"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 30 luglio 2024

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Articoli di riviste sul tema "Sheep"

Whelan, M. B., P. J. Bowman, D. H. White e C. R. McLeod. "SHEEPO A sheep management optimisation package for sheep industry specialists". Australian Veterinary Journal 62, s1 (novembre 1985): 142–43. http://dx.doi.org/10.1111/j.1751-0813.1985.tb13922.x.

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A. R. Jatnika e D. Tanggasari. "Bone Distribution in Commercial Cuts of Local Sheep Carcasses Given Indigofera Flour with Different Rearing System". Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan 12, n. 1 (31 gennaio 2024): 21–25. http://dx.doi.org/10.29244/jipthp.12.1.21-25.

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This study aims to evaluate bone distribution in commercial cuts of local sheep carcasses fed indigofera flour, taking into account differences in rearing systems. This study used 20 local female sheep aged 1 year with an average initial weight of around 18.3 ± 2.01 kilograms. These sheep were reared for 4 months with two types of rearing systems, namely intensive and semi-intensive. Indigofera flour and commercial concentrate were given at 07.00 in the morning, and at 11.00 grass were given in a ratio of 40:60%. This research used four different treatments, namely five sheeps that were reared semi-intensively by feeding commercial concentrates (P1SI), five sheeps were reared semi-intensively by feeding indigofera flour (P2I), five sheeps were reared intensively by feeding commercial concentrate and grass (P1SI), and five sheeps housed with indigofera flour and grass (P2I). This study used a completely randomized design with a 2x2 factorial pattern and 5 replications, and initial weight as a correction factor. The results of the study showed that sheep fed indigofera flour had a lower bone weight in commercial carcass cuts than sheep fed commercial concentrate. However, with a semi-intensive rearing system, sheep bone weight does not appear to be different.

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Fitriani, Nurul, Pudji Astuti, Claude Mona Airin, Sarmin e Nur Adianto. "Comparison of Albumin/Globulin (A/G) Ratio Between Pregnant and Lactation of Thin-Tail Sheep". BIO Web of Conferences 49 (2022): 01010. http://dx.doi.org/10.1051/bioconf/20224901010.

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The albumin/globulin (A/G) ratio can be an immunological indicator of sheep which can be influenced by reproductive status such as pregnant and lactation conditions. However, a study of A/G ratio during pregnant and lactation in thin-tailed sheep is still lack. This study aimed to determine the levels of A/G ratio in thin-tailed sheep during pregnancy and lactation. This study used twelve of ewes thin-tailed sheeps (seven pregnant sheeps, and five lactating sheeps) rearing in Berbah, Sleman, Yogyakarta. Blood samples were collected through the jugular vein and filled into the EDTA tube and then albumin and total protein were measured. The levels of globulin were calculated by subtracting the total protein with albumin. The mean of A/G ratio in pregnant and lactation thin-tailed sheep was 0.72±0.18, and 0.57±0.15, respectively. Statistical analysis showed that there was no significantly difference in A/G ratio between pregnant and lactation (P>0.05). In conclusion, the difference in physiological status (pregnancy versus lactation) had no significant effect on the A/G ratio in thin-tailed sheep.

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Purnamasari, Listya, Syeh Ahmad Muhammad Basalamah, Sri Rahayu e Sri Darwati. "Respon Fisiologis Domba Ekor Tipis dan Domba Garut Dengan Pemberian Pakan Konsentrat dan Limbah Tauge". Jurnal Ilmu Peternakan Terapan 4, n. 1 (10 dicembre 2020): 27–33. http://dx.doi.org/10.25047/jipt.v4i1.2344.

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The present study aimed to evaluate some physiological variables of thin tailed sheep and Garutsheep fed by concentrate and mung bean sprout waste diet. The physiological variables includedrectal temperature, respiration rate, and heart rate. Six Javanese thin tailed sheeps (16.27±0.86kg) and six Garut sheeps (10.68±1.82 kg) which aged less a year were selected for 4 treatments byfactorial design 2 x 2. The first factor was diet (concentrate and bean sprout waste) and the secondfactor was kind of sheep (Javanese thin tailed sheep and Garut sheep). The sheep were fedindividually for a maintenance requirement on body weight. Ambient temperature, relativehumidity, and physiological variables were measured every morning before feeding during 8weeks. The result showed that the physiological response of Javanese thin tailed sheep and Garutsheep fed by concentrate and mung bean sprout waste diet showed no interaction (P>0.05). Thephysiological response of sheep was not significantly different but the feed treatments had asignificant effect (P>0.05). Rectal temperature, heart rate, and respiration rate were still classifiedas normal so the mung bean sprout waste diet can be used as an alternative source of protein tosubstitute concentrate.

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McPhee, M. J. "SheepO Version 4.0: A sheep management package". Environmental Software 11, n. 1-3 (gennaio 1996): 105–12. http://dx.doi.org/10.1016/s0266-9838(96)00044-5.

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Ayres, J. F., M. J. McPhee, A. D. Turner e M. L. Curll. "The grazing value of tall fescue (Festuca arundinacea) and phalaris (Phalaris aquatica) for sheep production in the northern tablelands of New South Wales". Australian Journal of Agricultural Research 51, n. 1 (2000): 57. http://dx.doi.org/10.1071/ar99080.

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The grazing value of phalaris–white clover and tall fescue–white clover pastures was compared in a temperate summer-rainfall environment in the high rainfall zone of eastern Australia. Data were derived from an experiment which evaluated pasture cultivars when grown in binary mixtures and grazed by sheep. The data were also simulated with the decision support system SheepO (Version 4.0) and validated by visual techniques, deviance measures, and statistical tests. The model generally simulated green biomass, liveweight gain, and clean fleece weight with acceptable accuracy. Pasture based on tall fescue–white clover produced more green pasture biomass in all seasons, in all years, and at both low (10 sheep/ha) and high (15 sheep/ha) stocking rates when compared with phalaris–white clover. Sheep grazing tall fescue–white clover pasture were turned off about 5 kg heavier each year and produced about 0.6 kg/head more clean fleece weight; the wool production per head of sheep grazing tall fescue–white clover at 15 sheep/ha was similar to that for sheep grazing phalaris–white clover pasture at 10 sheep/ha. These differences in wool production were accompanied by consistent effects on wool quality; the fleeces of sheep grazing tall fescue–white clover pasture were markedly sounder in tensile strength but broader in fibre diameter. These data and the SheepO simulations highlight the potential for pasture cultivars with enhanced seasonal growth and nutritive value to alleviate feed-gaps and improve the feed-base for grazing animals.

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Zadeh, Jalal Bayati, Nasrollah Moradi kor e Sajjad Abedini. "The Effects of Different Levels Discarded Dates on Synthesis of Microbial Protein in Kermani Sheeps". International Journal of Life Sciences 9, n. 5 (14 giugno 2015): 45–49. http://dx.doi.org/10.3126/ijls.v9i5.12691.

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The purpose of this study was to examine the effects of different levels discarded dates on microbial protein synthesis of kermani sheeps. Four rumen cannulated kermani sheeps were used in a 4 × 4 square Latin change-over design within 21 days period. In this experiment, different amount of discarded dates including 0 (control), 10, 20 and 30 % were used. Microbial protein synthesis, blood urea nitrogen and body weight change of sheeps were evaluated. The results of this experiment showed that the increasing levels of discarded dates in diets of sheep increased microbial protein synthesis and reduce nitrogen excretion through urine compared with the control treatment (P<0/05). Body weight change was highest in sheep fed 30% discarded dates and lowest in sheep fed the control diet. Urea blood was affected by using different levels of discarded dates in the diets (P<0/05). Discarded dates as a supplement appears to increase synthesis of microbial protein in rumen. The results must be interpreted with caution as only four sheep were used in the experiment.DOI: http://dx.doi.org/10.3126/ijls.v9i5.12691

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Suwarta, F. X. "Analisis Pemasaran Domba dari Tingkat Peternak Sampai Penjual Sate di Kabupaten Sleman". Sains Peternakan 7, n. 1 (27 ottobre 2016): 25. http://dx.doi.org/10.20961/sainspet.7.1.25-29.

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This aim of this research was to study marketing chain of sheeps from farmer, trader and satay seller and to study cost of marketing at each of instituted marketing and the revenue of farmer, trader and satay seller in Sleman regency, Yogyakarta. The research was conducted using a survey method. The respondents from sheep farmer, sheep trader and satay seller were 107, 37 and 64, respectively. Data were analyzed descriptively. The cost efficiency of marketing system was analyzed for marketing cost, margin, farmer’s share, market competition and profitability. The result showed that the most efficient of the distribution of the sheep marketing was from sheep, farmer, sheep trader and consumer. Margin analyzed showed that male sheep contributed larger margin than female sheep (19.78: 19.14%). The farmer share for sheep marketing revealed that female sheep contributed 80.85% while male sheep 80.21%. Coefficiency of market competition showed that sheep farmer had higher coefficiency competition than sheep trader both to female and male. Sheep farmer had higher net profit margin (NPM) level but had lower operating ratio level. Satay seller had lower NPM and higher operating ratio level. Key words : sheep, marketing, efficiency of marketing

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Buxbaum, Shari. "Sheep". Journal of Agricultural & Food Information 6, n. 1 (9 marzo 2004): 11–20. http://dx.doi.org/10.1300/j108v06n01_03.

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Tesi sul tema "Sheep"

Corke, M. J. "The welfare of sheep with sheep scab (Psoroptes ovis infestation)". Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598003.

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The effects of sheep scab, (Psoroptes ovis infestation) on the welfare of sheep were studied. Flocks of sheep naturally infested with sheep scab and flocks of uninfested sheep, were studied before and after treatment with acaricides. A group of sheep, experimentally infested with Psoroptes ovis mites, were studied throughout the infestation. Behaviour was studied using focal and scan sampling techniques. Sheep scab resulted in increases in rubbing, scratching and biting. Rubbing and scratching in infested sheep were sometimes accompanied by non-functional mouthing, considered to be a stereotypy. Times spent grazing, cudding and idling were not affected by sheep scab, but the bout lengths of grazing and idling were reduced. The experimental group showed an increasing neutrophilia through the infestation, with erratic increases in eosinophil count and fibrinogen, while haemoglobin concentration and haematocrit decreased. Naturally infested flocks showed lymphopenia after treatment. Serum globulin concentrations increased through the infestation, with a concurrent decline in serum albumin. The serum globulin started to decline within one month after treatment. Some lactate dehydrogenase isoenyzme fractions increased during the infestation. Prolactin decreased and β- endorphin increased throughout the experimental infestation, although seasonal factors may have influenced these results. There was no change in pressure nociceptor threshold due to sheep scab. A questionnaire survey of sheep farmers suggested that sheep scab in Britain had increased in incidence and distribution over the last decade. The welfare of sheep infected with sheep scab and the control of sheep scab are discussed in the context of the experimental findings.

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Glendinning, Laura. "Sheep lung microbiota". Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/29541.

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Until recently it was assumed that the healthy mammalian lung did not harbour a microbiota, unlike other body sites. However, through the use of sequencing based technologies this has been shown to not be the case. Low biomass communities of microbes can be identified in the healthy lung and the lung microbiota in various diseases states has been shown to differ form these 'healthy' communities. The sheep respiratory microbiota is of interest from both an animal health perspective and due to the potential use of the sheep as a large animal model for studying the lung microbiota. In this thesis I seek to characterise the composition and variability of the sheep lung microbiota; the differences between the sheep upper and lower respiratory tract bacterial communities and to assess whether exhaled breath condensate collection can be used as a non-invasive lung microbiota sampling method. To study the bacterial communities present in samples I have used 16S rRNA gene sequencing and analysis. In Chapter 3 I examine the inter-individual and spatial variability present within the sheep lung microbiota. Protected specimen brushings were collected from three lung segments in six animals at three time-points. In a separate sheep a greater number of brushings was taken (n=16) in order to examine the amount of variability over a smaller spatial scale. I find that there can be large differences between the bacterial communities isolated from different locations within the lung, even over short distances. Samples also cluster by the sheep from which they were taken, indicating a host specific influence on the lung microbiota. In Chapter 4 I compare whole lung washes and oropharyngeal swabs from 40 lambs in order to examine the differences between the upper and lower respiratory tract microbiotas. I find that oropharyngeal swabs separate into rumen-like or upper respiratory tract-like bacterial communities. Despite the fact that in humans the upper and lower respiratory microbiotas have been shown to have similar compositions, the sheep lung microbiota samples in this study do not resemble either oropharyngeal samples or reagent only controls. In my first two results chapters, lung sampling methods were used which involved either anaesthesia combined with a bronchoscopic procedure (Chapter 3) or samples being taken from dead animals (Chapter 4). In Chapter 5 I assess whether there is a less invasive way of taking lung microbiota samples from a living individual, both to minimise the procedural stress on animals used as models and to increase the pool of potential volunteers for human lung microbiota studies. I compared samples taken via protected specimen brushings to samples taken via exhaled breath condensate collection, a less invasive sampling technique. I find that condensate samples contain less bacterial DNA and different bacteria than brushing samples, indicating that it is unlikely they could be used as a replacement for invasive sampling methods. In my final results chapter I compare the results across Chapters 3, 4 and 5 to identify bacteria which occur consistently in the sheep lung and could therefore potentially be described as core lung microbiota members. In conclusion, while I have found that there are large differences between the sheep lung microbiota and that which has previously been described in humans, the sheep can still be of use as a model in studies where these differences would not have a significant impact, such as in Chapter 5 of this thesis. I have identified several bacterial members of the core sheep lung microbiota which in future it would be interesting to better characterise and to assess whether they play a role in sheep health.

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Abdulkhaliq, Ahed. "Estimation of phenotypic and genetic parameters for some reproductive traits in Columbia, Suffolk and Targhee sheep breeds". Connect to resource, 1986. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1244132589.

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Regnault, Timothy Robert Hume. "Orchestrated partitioning of maternal nutrients during ovine pregnancy /". View thesis View thesis, 1997. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030513.111110/index.html.

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Thesis (Ph. D. of Philosophy)--University of Western Sydney, Hawkesbury, 1997.
"A thesis submitted to the School of Agriculture and Rural Development, Faculty of Agriculture and Horticulture, University of Western Sydney Hawkesbury, in part fulfilment of the requirements for the Degree of Doctor of Philosophy." Includes bibliographical references (p. 236-267).

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Alink, Frances. "Maternal and peri-ovulatory nutritional effects on the expression of the Inverdale (FecX1) fecundity gene in texel X Scottish hillbreed sheep". Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25795.

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Stockman, Catherine Ann. "The physiological and behavioural responses of sheep exposed to heat load within intensive sheep industries". Thesis, Stockman, Catherine Ann (2006) The physiological and behavioural responses of sheep exposed to heat load within intensive sheep industries. PhD thesis, Murdoch University, 2006. https://researchrepository.murdoch.edu.au/id/eprint/437/.

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The live export and feedlotting industries are the major intensive sheep industries in Australia. During live shipment, sheep are exposed to prolonged periods of high heat and humidity, with little relief for several days, while environmental conditions in a Western Australian sheep feedlot have not yet been assessed. The research described in this thesis was conducted to determine the physiological responses of sheep to conditions within the live export and feedlotting industries, with particular focus on that of heat stress. Merino wethers and Awassi rams developed significant change in physiological variables when exposed to prolonged periods of high heat and humidity, such as during long haul, live export voyages to the Northern Hemisphere. Physiological changes such as increased core temperature, respiratory rate, panting score and associated changes in blood gas variables were apparent in Merino wethers. However, Awassi rams showed exceptional ability to maintain homeostasis under the same environmental conditions, with no significant changes in core temperature and only slight alteration in blood gas variables. Results from this study indicated that electrolyte supplementation of sheep during live export would not be warranted because plasma electrolytes did not drastically change and blood gas variables quickly returned to normal following the heat. Further studies developed methods to determine the critical wet bulb temperature, otherwise known as the heat stress threshold (HST) of Merino rams, ram lambs and wethers exposed to live export conditions. These studies found that ram lambs had a lower HST than both adult rams and wethers. However, both adult rams and wethers had a similar HST. Heat stress thresholds determined from these studies have been used in a model to predict high risk shipments for particular classes of sheep (Stacey 2003). This thesis also details the environmental conditions within a Western Australian summer feedlot and the physiological responses of cross bred ewes and wethers to these conditions when fed feedlot rations. This study found that temperatures in a typical Western Australian feedlot in summer increased above 40 degrees C with low humidity; however, temperatures generally decreased to be within the sheep's thermoneutral zone at night. Both ewes and wethers had significantly increased core temperatures in response to these conditions, with sheep spending significantly more time in the shade than in the sun during the day. Both ewes and wethers had increased respiratory rates and panting scores during an intensive climate room experiment with similar environmental conditions. However, feed intake did not decrease even when climate room temperatures increased at night and humidity levels were higher than that found in typical feedlot conditions in Western Australia. Work completed within this thesis has led to a greater understanding of the physiological responses of sheep to prolonged and continuous high heat such as during live export and to conditions of a typical Western Australian summer feedlot. This research has set a foundation for further study of management of sheep during live export and feedlotting.

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Stockman, Catherine Ann. "The physiological and behavioural responses of sheep exposed to heat load within intensive sheep industries". Stockman, Catherine Ann (2006) The physiological and behavioural responses of sheep exposed to heat load within intensive sheep industries. PhD thesis, Murdoch University, 2006. http://researchrepository.murdoch.edu.au/437/.

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Hou, Xian Zhi. "Diet selection in sheep". Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/28250.

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Ezaz, Zere. "Studies in Menz sheep". Thesis, Bangor University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276196.

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Mason, Sam. "Toxoplasma gondii in sheep". Thesis, University of Leeds, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556024.

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Toxoplasma gondii infects sheep horizontally (from cat faeces) or vertically (transplacentally). Vertically infected lambs sometimes die. Here, transmission and performance impacts were considered in one Charollais flock and one Swaledale flock. B1-PCR was performed on umbilical cord, heart and brain. MAT was performed on blood and pleural effusion. IgG-ELISA was performed on colostrum. B1-PCR was more sensitive than four other methods, producing a band in 50% of replicates when each replicate contained 0.02 parasite genome copies. 16/243 (6.6%) viable Charollais, 30/263 (11.4%) viable Swaledale, 3/54 non-viable Charollais and 0116 non-viable Swaledale were PCR-positive, showing no difference between flocks. At age four months 64/524 (12.2%) Charollais and 10/329 (3.0%) Swaledale were seropositive, showing relatively high seroprevalence in Charollais. 5/44 non-viable Charollais and 1114 non-viable Swaledale were seropositive. Colostrum ELISA was 75% sensitive and 100% specific relative to serum MAT. 15/408 (3.7%) Charollais and 31139 (2.2%) Swaledale were colostrum ELISA-positive, showing no difference between flocks. PCR positivity was not associated with seropositivity. PCR positivity was randomly dispersed between litters. In Charollais seropositivity was overdispersed between litters, seroprevalence was higher than PCR prevalence, young ewes' lambs were frequently PCR-positive and large litters frequently contained seropositive lambs. Those results might have been due to vertical transmission. In Swaledale, PCR positivity was not associated with ewe age and seropositivity was rare. Those results suggested little transmission. Lamb seroconversion, and colostrum ELISA positivity, were not associated with ewe age. Overall, it is suggested that ewes ingested oocysts but vertical transmission was sometimes interupted by lambing, especially in Swaledale. In eight cases clinical toxoplasmosis was suspected. No evidence was found suggesting subclinical effects of T. gondii leading to reduced lamb survival. Charollais born PCR-positive were relatively light at age two months but that association was not found in Swaledale. Serology did not confirm any stunting effect.

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Più fonti

Libri sul tema "Sheep"

ill, Vredenburgh Carol, a cura di. Shep the sheep of Caladeen. Lyme, N.H: Flyleaf Pub., 2001.

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ill, Whatley Bruce, a cura di. Pete the sheep-sheep. New York: Clarion Books, 2005.

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ill, Huang Benrei, a cura di. Sheep don't count sheep. New York: Margaret K. McElderry Books, 2003.

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Butler, Alan. Sheep. Winchester, U.K: O Books, 2006.

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Dieker, Wendy Strobel. Sheep. Minneapolis, MN: Jump!, 2012.

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Bédoyère, Camilla De la. Sheep. Mankato, Minn: QEB Pub., 2011.

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Wilsdon, Christina. Sheep. New York: Gareth Stevens, 2011.

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Maginn, Simon. Sheep. London: Corgi, 1994.

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Stone, Lynn M. Sheep. Vero Beach, Fla: Rourke Corp., 1990.

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Wilsdon, Christina. Sheep. New York: Gareth Stevens, 2010.

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Capitoli di libri sul tema "Sheep"

Forbes, Andrew B. "Ectoparasites of sheep: sheep mange mites." In Parasites of cattle and sheep: a practical guide to their biology and control, 267–74. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789245158.0267.

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Meadows, Jennifer R. S. "Sheep: Domestication". In Encyclopedia of Global Archaeology, 9637–40. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-30018-0_2215.

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Ma, Li. "Lost Sheep". In Christianity, Femininity and Social Change in Contemporary China, 29–40. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31802-4_3.

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de la Fuente, Miguel Angel, Ramos Mercedes, Recio Isidra e Juárez Manuela. "Sheep Milk". In Milk and Dairy Products in Human Nutrition, 554–77. Oxford: John Wiley & Sons, 2013. http://dx.doi.org/10.1002/9781118534168.ch25.

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Thomas, David L., e George F. W. Haenlein. "Sheep Milk". In Handbook of Milk of Non-Bovine Mammals, 181–209. Oxford, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119110316.ch3.

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Mehlhorn, Heinz. "Sheep Tick". In Encyclopedia of Parasitology, 2507. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_4322.

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Mehlhorn, Heinz. "Sheep Tick". In Encyclopedia of Parasitology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27769-6_4322-1.

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Meadows, Jennifer R. S. "Sheep: Domestication". In Encyclopedia of Global Archaeology, 6597–600. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4419-0465-2_2215.

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Cockram, M. S. "Sheep transport." In Livestock handling and transport, 239–53. Wallingford: CABI, 2019. http://dx.doi.org/10.1079/9781786399151.0239.

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"Sheep Sheep". In fretwork, 38–40. University of Iowa Press, 2021. http://dx.doi.org/10.2307/j.ctv1z7kkb3.18.

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Atti di convegni sul tema "Sheep"

McLean, Alistair, e Robert Jarvis. "Electric Sheep". In CHI PLAY '18: The annual symposium on Computer-Human Interaction in Play. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3270316.3272057.

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Hirano, Yoshihisa. "Stray sheep". In ACM SIGGRAPH 99 Electronic art and animation catalog. New York, New York, USA: ACM Press, 1999. http://dx.doi.org/10.1145/312379.313089.

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Rosen, Dani. "Censor-sheep". In ACM SIGGRAPH 99 Electronic art and animation catalog. New York, New York, USA: ACM Press, 1999. http://dx.doi.org/10.1145/312379.312877.

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Angstenberger, Vera. "Oh sheep!" In ACM SIGGRAPH 2012 Computer Animation Festival. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2341836.2341878.

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Mentor, Gottfried. "Oh sheep!" In SIGGRAPH Asia 2012 Computer Animation Festival. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2407603.2407635.

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Draves, Scott. "Electric Sheep". In ACM SIGGRAPH 2004 Art gallery. New York, New York, USA: ACM Press, 2004. http://dx.doi.org/10.1145/1185884.1185975.

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Draves, Scott. "Electric sheep". In ACM SIGGRAPH 2007 computer animation festival. New York, New York, USA: ACM Press, 2007. http://dx.doi.org/10.1145/1281740.1281742.

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Spasskaya, T. A. "SHEEP NECROBACTERIOSIS". In DIGEST OF ARTICLES ALL-RUSSIAN (NATIONAL) SCIENTIFIC AND PRACTICAL CONFERENCE "CURRENT ISSUES OF VETERINARY MEDICINE: EDUCATION, SCIENCE, PRACTICE", DEDICATED TO THE 190TH ANNIVERSARY FROM THE BIRTH OF A.P. Stepanova. Publishing house of RGAU - MSHA, 2021. http://dx.doi.org/10.26897/978-5-9675-1853-9-2021-57.

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Koblin, Aaron Michael. "The sheep market". In Proceeding of the seventh ACM conference. New York, New York, USA: ACM Press, 2009. http://dx.doi.org/10.1145/1640233.1640348.

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Xin, Min, e Ehud Sharlin. "Sheep and wolves". In CHI '06 extended abstracts. New York, New York, USA: ACM Press, 2006. http://dx.doi.org/10.1145/1125451.1125735.

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Rapporti di organizzazioni sul tema "Sheep"

Morrical, Daniel G. Sheep Research Flock. Ames: Iowa State University, Digital Repository, 2003. http://dx.doi.org/10.31274/farmprogressreports-180814-633.

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Morrical, Daniel G., e L. James Secor. McNay Sheep Flock Production Parameters. Ames: Iowa State University, Digital Repository, 2006. http://dx.doi.org/10.31274/farmprogressreports-180814-585.

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Schommer, Timothy J., e Melanie M. Woolever. A review of disease related conflicts between domestic sheep and goats and bighorn sheep. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2008. http://dx.doi.org/10.2737/rmrs-gtr-209.

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Sorum, Mathew. Dall?s sheep survey within Yukon-Charley Rivers National Preserve: July 2023. National Park Service, 2024. http://dx.doi.org/10.36967/2303340.

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Abstract (sommario):

A minimum count survey of Dall?s sheep (Ovis dalli) in Yukon-Charley Rivers National Preserve was conducted from July 18 to 20, 2023. The Preserve was last surveyed in July of 2018. The current survey examined the same 7 core survey units as the previous survey and the Ogilvie Mountains. In the core area (the 7 units most often surveyed), 70 sheep (32 ewes, 13 lambs, 6 yearlings and 19 rams) were detected. This constitutes a 75% decrease from the long-term average (284 sheep, 1997?2018) and a 68% decrease from the last survey (221 sheep, 2018). There were 40 lambs, 19 yearlings, and 59 rams per 100 ewes in the core area. Declines varied by space and sex classes. Declines were greater in survey units with historically fewer sheep and lower proportions of ewes (91% decline; 5580 Mountain, Copper Mountain, Diamond Fork, Twin Mountain) versus the survey units with more sheep and higher proportions of ewes (67% decline; Charley River, Cirque Lakes, Mount Sorenson). Across the latter more populous survey units, ewes and rams declined by 70% and 40%, respectively, compared to the long-term average. For the first time, no sheep were observed in two of the survey units (Copper Mountain and Diamond Fork). In the Ogilvie Mountains, 26 sheep were detected (18 ewes, 4 lambs, 0 yearling and 4 rams) representing a 28% decline since the last survey. This translates to 22 lambs, 0 yearlings and 22 rams per 100 ewes.

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DeMartini, James C., Abraham Yaniv, Jonathan O. Carlson, Arnona Gazit, Leonard E. Pearson, Kalman Perk, J. K. Young, Noam Safran e A. Friedman. Evaluation of Naked Proviral DNA as a Vaccine for Ovine Lentivirus Infection. United States Department of Agriculture, settembre 1994. http://dx.doi.org/10.32747/1994.7570553.bard.

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Ovine lentivirus (OvLV) infection is widespread in sheep of the United States and Israel and is responsible for substantial economic losses. The primary goal of this project was to evaluate naked proviral DNA as a vaccine to induce protective immunity in sheep in endemic areas. Contrary to expectations, inoculation of sheep with proviral DNA derived from the full length OvLV molecular clone pkv72 did not result in detectable OvLV infection, but infectious virus was recovered from transfected ovine cells. Kv72 virus produced by these cells infected sheep and induced antibody responses, and was used as a viral challenge in subsequent experiments. To improve in vivo transfection efficiency and compare the viral LTR with other romoters, expression of reporter genes was studied in sheep transfected in vivo by injection of cationic liposome-DNA complexes; one formulation produced gene expression in a sheep for 4 months following a single intravenous injection. Since the pol-deleted OvLV construct was not stable in vivo, twelve lambs were injected with plasmids containing the Kv72 gag region (pCMVgag) or env region (pCMVenv), or saline. Prior to challenge, no detectable anti-OvLV immune responses were detected. Following homologous challenge with OvLV. Although the naked DNA approach to vaccination holds promise for control of ovine lentivirus-induced disease, further work needs to be done to develop more effective methods of transfecting sheep with DNA.

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Bazer, Fuller W., Arieh Gertler e Elisha Gootwine. Role of Placental Lactogen in Sheep. United States Department of Agriculture, gennaio 2001. http://dx.doi.org/10.32747/2001.7574339.bard.

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Central problems in sheep and dairy cattle production are reproductive failure due to embryonic/fetal mortality and low birth weights, especially in prolific breeds, and reduced milk yields which adversely affect neonatal survival and economy of production. The sheep placenta expresses lactogenic (ovine placental lactogen, oPL) and somatogenic (ovine placental growth hormone, oGH) hormones. Our research has focused on the biological roles of oPL and oGH in function of the uterine endometrium during gestation and the mammary gland during pregnancy and lactation. Major conclusions were that: ( 1 ) immunization of prepubertal ewes against oPL resulted in increased birth weights of their lambs and their milk production during lactation; (2) neither oPL nor oGH had an antiluteolytic effect on uterine endometrium to affect lifespan of the corpus luteum; (3) only sequential exposure of the progesterone stimulated uterus to oIFNt and oPL or oGH increased endometrial gland proliferation and secretory protein gene expression; (4) oPL signals through a homodimer of ovine prolactin receptor (PRL-R) and heterodimer of oPRL-R and growth hormone receptor (GH-R); (5) exogenous recombinant oPL and oGH stimulated mammogenesis and milk yield during lactation; and (6) mutation of oPL and oGH was used to define specific biological effects and a rational basis for design of a specific receptor agonists or antagonists. This project was very productive in elucidating basic biological effects of oPL and oGH on intracellular signal transduction pathways, uterine development and secretory function, as well as mammogenesis and lactogenesis. We determined that immunization of prepubertal ewes against roPL increased birth weights of their lambs, especially those born as twins and triplets, as well as enhanced lactational performance. These studies significantly extended our knowledge of uterine and fetal-placental physiology and provided a foundation for new strategies to enhance reproductive and lactation efficiency. Based on these results, the major achievements were: 1) creation of a practical and cost effective management tool for producers to increase reproductive performance, neonatal survival, and milk yield of ewes in commercial flocks; and 2) define, for the first time, biological effects of oPL on endometrial functions and gene expression by uterine gland epithelium.

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Hogden, J., G. Papcun, I. Zlokarnik e D. Nix. Analysis of wolves and sheep. Final report. Office of Scientific and Technical Information (OSTI), agosto 1997. http://dx.doi.org/10.2172/521574.

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Zhao, Xia, Suneel Onteru, Max F. Rothschild e Dorian J. Garrick. Causative Gene Discovery for Sheep Inherited Disorders. Ames (Iowa): Iowa State University, gennaio 2011. http://dx.doi.org/10.31274/ans_air-180814-678.

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Young, L., e C. Yde. Ural-tweed bighorn sheep wildlife mitigation project. Test accounts, giugno 1990. http://dx.doi.org/10.2172/6536405.

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Spencer, Thomas E., Elisha Gootwine, Arieh Gertler e Fuller W. Bazer. Placental lactogen enhances production efficiency in sheep. United States Department of Agriculture, dicembre 2005. http://dx.doi.org/10.32747/2005.7586543.bard.

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Abstract (sommario):

The key objectives of this BARD project were to: (1) study long-term effects of immunization of prepubertal ewes against recombinant ovine placental lactogen (roPL) on subsequent birth weights of their lambs and their milk production; (2) optimize the anti-roPL immunization protocol using adjuvant preparations acceptable to producers and regulatory agencies; and (3) determine the physiological mechanism(s) whereby immunization against oPL increases fetal growth and development and mammogenesis. These objectives were based on key findings from a previous BARD project that: (a) immunization of ewes against roPL increased lamb birth weight and ewe milk production during lactation; (b) roPL and recombinant ovine growth hormone (roGH) increased the proliferation and differentiated function of endometrial glands that, in turn, would enhance uterine secretions necessary for fetal and placental growth; and (c) exogenous roPL and roGH stimulated mammogenesis and milk production during lactation. The BARD projects address central problems in sheep production, including reproductive failure due to embryonic/fetal mortality, low birth weight of lambs especially in prolific breeds, and reduced milk yields which affect neonatal survival. The sheep placenta secretes both lactogenic (oPL) and somatogenic (oGH) hormones. The receptors for those hormones are present in the fetus and placenta as well as maternal uterus, and mammary gland. Our research has focused on determining the biological role of these placental hormones in development and differentiation of the uterus during gestation and the mammary gland during pregnancy and lactation. Studies conducted in the current BARD project indicated that the effects of anti-roPL immunization were variable in ewes and that commercially available and widely acceptable adjuvant preparations were not effective to produce high anti-roPL titers in pre-pubertal ewes. In the non-prolific Rambouillet ewe in Texas and in the Awassi and the Assaf in Israel, anti-roPL immunization increased lamb birth weight; however, the magnitude of this effect and the inherent variability precluded our ability to determine the physiological mechanism of how the immunization increases fetal growth. Collectively, our findings suggest that anti-roPL immunization is not currently feasible as an easy and efficacious tool for the producer to increase flock reproductive and production efficiency. The variability in response of individual ewes to anti-roPL immunization likely includes modifying the recombinant hormone and the type of adjuvant used for the immunization. In particular, the oPL may need to be modified to ensure maximum antigenicity in a broad range of breed types. Nonetheless, the investigators continue to collaborate on identifying fundamental mechanisms that can be improved by genetics or management to enhance the efficiency of uteroplacental function and, in turn, fetal growth and development. High prolificacy is a desirable trait in intensive sheep production systems. One of the main limitations of using prolific breeds of sheep is that increased litter size is associated with low birth weights and increased mortality of lambs. Further, low birth weight is associated with an increased propensity for adult diseases and decreased production efficiency. Indeed, our recent studies find that the birth weights of lambs born in large litters can be improved by both genetics and management. Future cooperative research will continue to focus on reproductive efficiency of sheep that have broader implications for improving production efficiency in all types of ruminant livestock.

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