Relevant bibliographies by topics / Domestic sheep

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Domestic sheep'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2022

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Journal articles on the topic "Domestic sheep"

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Reuter, Gábor, Ákos Boros, Péter Pankovics, and László Egyed. "Kobuvirus in Domestic Sheep, Hungary." Emerging Infectious Diseases 16, no. 5 (May 2010): 869–70. http://dx.doi.org/10.3201/eid1605.091934.

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McRae, A. F., J. C. McEwan, K. G. Dodds, T. Wilson, A. M. Crawford, and J. Slate. "Linkage Disequilibrium in Domestic Sheep." Genetics 160, no. 3 (March 1, 2002): 1113–22. http://dx.doi.org/10.1093/genetics/160.3.1113.

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Abstract The last decade has seen a dramatic increase in the number of livestock QTL mapping studies. The next challenge awaiting livestock geneticists is to determine the actual genes responsible for variation of economically important traits. With the advent of high density single nucleotide polymorphism (SNP) maps, it may be possible to fine map genes by exploiting linkage disequilibrium between genes of interest and adjacent markers. However, the extent of linkage disequilibrium (LD) is generally unknown for livestock populations. In this article microsatellite genotype data are used to assess the extent of LD in two populations of domestic sheep. High levels of LD were found to extend for tens of centimorgans and declined as a function of marker distance. However, LD was also frequently observed between unlinked markers. The prospects for LD mapping in livestock appear encouraging provided that type I error can be minimized. Properties of the multiallelic LD coefficient D′ were also explored. D′ was found to be significantly related to marker heterozygosity, although the relationship did not appear to unduly influence the overall conclusions. Of potentially greater concern was the observation that D′ may be skewed when rare alleles are present. It is recommended that the statistical significance of LD is used in conjunction with coefficients such as D′ to determine the true extent of LD.
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Geddes, David S. "Mesolithic domestic sheep in West Mediterranean Europe." Journal of Archaeological Science 12, no. 1 (January 1985): 25–48. http://dx.doi.org/10.1016/0305-4403(85)90013-5.

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Kästner, SBR, D. Demuth, R. Bettschart-Wolfensberger, MK Akens, P. Wapf, and M. Huhtinen. "Pharmacokinetics of intramuscular medetomidine in domestic sheep." Veterinary Anaesthesia and Analgesia 28, no. 4 (October 2001): 205–6. http://dx.doi.org/10.1046/j.1467-2987.2001.00064.x-i4.

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Morton, A. Jennifer, and Laura Avanzo. "Executive Decision-Making in the Domestic Sheep." PLoS ONE 6, no. 1 (January 31, 2011): e15752. http://dx.doi.org/10.1371/journal.pone.0015752.

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Odden, John, John D. C. Linnell, Pal Fossland Moa, Ivar Herfindal, Tor Kvam, and Reidar Andersen. "Lynx Depredation on Domestic Sheep in Norway." Journal of Wildlife Management 66, no. 1 (January 2002): 98. http://dx.doi.org/10.2307/3802876.

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You, Yue, Peng Lü, Jianxin Wang, Jian Ma, and Meng Ren. "The emergence and early utilization of domestic sheep in Xinjiang." Chinese Archaeology 18, no. 1 (November 27, 2018): 172–79. http://dx.doi.org/10.1515/char-2018-0017.

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Abstract This paper summarizes current zooarchaeological research on the origin of domestic sheep and early sheep exploitation strategies in Xinjiang. The researchers analyze sheep bones excavated from the Shirenzigou ( 石人子沟, lit. Stone Human Statue Gully) Site using zooarchaeological methods, including using pelvises to identify sex, and confirm that the sheep at Shirenzigou were domesticated sheep. Previous discoveries and archaeological research in Xinjiang provide background for the researchers’ arguments that the main ways ancient people exploited domestic sheep during the Bronze Age to early Iron Age included: consuming and producing meat, wool, hide and milk; using sheep in rituals such as funerary practices; and making bone artifacts out of sheep bones.
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Li, Chunyan, Qiuyue Liu, Xiangyu Wang, Wenping Hu, Deping Han, Joram Mwashigadi Mwacharo, Caihong Wei, Mingxing Chu, and Ran Di. "Expression and localization of PIWI proteins in testis and ovary of domestic sheep." Czech Journal of Animal Science 65, No. 3 (March 31, 2020): 86–96. http://dx.doi.org/10.17221/7/2020-cjas.

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The piRNA-PIWI protein complex plays crucial roles in safeguarding the genome against inordinate transposon mobilization and regulation of embryonic development. A previous study indicated the presence of piRNA in sheep reproductive organs. However, the tissue distribution and cellular localization of PIWI proteins in sheep remains unclear. Therefore the present study aimed to explore the expression profiles of mRNAs of mammalian PIWI proteins (PIWIL1, PIWIL2, PIWIL4 and AGO3) in 9 tissues derived from adult male and female sheep. Results showed the expression of PIWIL1, PIWIL2, and PIWIL4 was significantly higher in the testis and ovary than in the other tissues. Immunohistochemistry analysis of testes indicated that each of the 4 proteins had specific cellular localizations, and some of the localizations were different from those of other species. All the proteins were mainly localized in the primary spermatocytes, suggesting that they are crucial for silencing of transposon to guarantee the integrity of the gamete genome during early stage of spermatogenesis. In the ovaries, the PIWI proteins were mainly localized in oocytes from antral follicles and leukocytes in ovarian blood. Our results provide insights to better understand the functions of PIWI proteins during spermatogenesis, oogenesis and immune defence in sheep.
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Shannon, Justin M., Jericho C. Whiting, Randy T. Larsen, Daniel D. Olson, Jerran T. Flinders, Tom S. Smith, and R. Terry Bowyer. "Population response of reintroduced bighorn sheep after observed commingling with domestic sheep." European Journal of Wildlife Research 60, no. 5 (July 16, 2014): 737–48. http://dx.doi.org/10.1007/s10344-014-0843-y.

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Flores-Foxworth, G., S. A. Coonrod, J. F. Moreno, S. R. Byrd, D. C. Kraemer, and M. Westhusin. "Interspecific transfer of IVM IVF-derived red sheep () embryos to domestic sheep ()." Theriogenology 44, no. 5 (October 1995): 681–90. http://dx.doi.org/10.1016/0093-691x(95)00248-7.

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Dissertations / Theses on the topic "Domestic sheep"

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Townsend, S. J. "Genetic diversity and domestication in sheep." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368146.

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Jenner, Lucy Jayne. "Endocrinology of early pregnancy in domestic ruminants." Thesis, University of Nottingham, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280376.

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Palmer, Brian C. "Predation on Domestic Sheep on Summer Range Lands in Southwestern Utah." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/362.

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Much of the decline of the U.S. sheep industry has been attributed to losses caused by predators. Most predatory losses are inflicted on lambs rather than ewes. Losses have historically ranged from 4-8% of lamb crops, inflicting significant financial loss on ranchers. However, most research providing data on sheep predation is over 20 years old. Changes in the sheep industry as well as predation rates may make previous loss rates inapplicable to current conditions. Coyotes (Canis latrans) are the primary predator of concern when it comes to sheep losses, but increasingly, cougars (Felis concolor) and black bears (Ursus americanus) are reported to be responsible for an increased proportion of lamb losses. I replicated a sheep depredation study conducted during the early 1970s in southwestern Utah and compared the results of the two studies to reassess losses and the predator species responsible for those losses. Total lamb losses to all causes in my study were comparable to losses reported in the 1970s as well as categories of verified and estimated predator losses. There was a significant variation in lamb losses between the 2 years of my study due to an increase in predator kills on sheep. Cougar and bear depredations occurred at significantly higher rates during my study than during the 1970s but did not produce an additive effect to overall predator losses. Most lambs killed by predators were located on or near pasture bed grounds as reported by other studies, but a large number were found >500 m from bed grounds. Rough terrain and scavenging by California condors (Gymnogyps californianus) made location of missing sheep difficult. The ability of cougars and bears to remove sheep carcasses from kill sites made the finding of sheep carcasses more difficult and caused an underreporting of sheep killed by these predators. I found that the loss of sheep to predation continues to be a problem for the sheep industry and its magnitude was unchanged from historic predation levels.
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Tapio, M. (Miika). "Origin and maintenance of genetic diversity in northern European sheep." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514282353.

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Abstract The Nordic and Baltic countries and North-western Russia have >20 old native sheep breeds. These together with recently synthesized breeds and local populations of international breeds make up the northern European sheep diversity. Changes in agriculture threaten to erode genetic diversity in sheep. Molecular genetic variation was assessed to understand genetic diversity in northern European sheep. Distribution of maternal lineages were studied based on mitochondrial control region variation in 76 sheep breeds in northern Europe and in a wide neighbouring area extending to the Caucasus and Central-Asia. Autosomal microsatellite variation was studied in 37 northern European breeds, and autosomal blood protein variation was studied in six Finnish and Russian breeds. Four distinct maternal lineages were observed in Eurasian sheep. Their distribution agrees with sheep expansion starting from the Near East. Two most common distinct lineages were recorded in northern Europe. Majority of northern sheep have the lineage, which predominates in other parts of Europe. Results suggest that the main maternal origin of northern sheep is in the south. However, rare "Asian" lineage was observed in several old northern European breeds. The rare type in the Nordic sheep is descendant to the type observed in the Middle Volga region, which suggest that some sheep were brought to northern Europe from the east. Microsatellites showed clustering of geographically neighbouring sheep, when breed locations are corrected for the recent transportations. The analysis separated long and short-tailed sheep, although this macroscale structure explains a small proportion of breed differences. Differentiation among the northern European breeds is stronger than typically observed in sheep. Many native breeds are less inbred than the local populations of the international breeds, but some rare breeds and subpopulations of divided unofficial strains were inbred. Some breeds require more careful maintenance due to recent population size reduction. Maintaining prolificacy in breeds such as the Finnsheep and the Romanov may require efficient avoidance of inbreeding. The breeds were ranked for conservation using simultaneously within-breed variation and breed divergence. Set of important breeds included seven rare old native breeds or strains which merit efficient conservation measures urgently.
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Qin, Jinyi. "Characterisation of the central region of the sheep major histocompatibility complex." Curtin University of Technology, School of Biomedical Sciences, 2008. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=118317.

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The major histocompatibility complex (MHC) is a chromosomal region encoding molecules controlling adaptive immune response in vertebrates. In farm animals, many associations between MHC loci and productivity traits including disease susceptibility have been described. However, current knowledge about the structure and function of the MHC in domestic animals, especially sheep, is very limited. Characterization of the sheep MHC may potentially facilitate breeding for enhanced disease-resistant animals through use of marker assisted selection. The main aim of this project has been to provide insights into the organization of the genomic content of the central region of the sheep MHC. The work described herein has utilized subcloning of a sheep BAC genomic library in conjunction with DNA sequencing to generate a map of the central region of the sheep MHC covering ≈700 kbp. Within this map the relative order and identity of twenty five recognized loci were established. For some loci the intergenic distances were also determined. The final map is the most accurate map of this region reported to date and shows a high degree of similarity to the analogous region of the human MHC. This work has been published and a copy of the paper is included in Appendix 1. During the course of this work detailed genomic sequences were obtained for several sheep central region loci. Complete nucleotide sequences were generated for the complement factor B locus (CFB) and the TNFα locus and a comparative analysis of these sequences confirmed their homology with other vertebrate orthologues. Extensive partial sequences for complement components C2 and C4 were also obtained and reported to GenBank.
In addition, a previously identified short tandem repeat locus designated BfMs believed to be in the CFB locus was mapped to an intron within the adjacent SKI2VL locus. Single nucleotide polymorphisms (SNPs) were identified by analysing homologous sequences from a minimum of five individual sheep. In total 33 SNPs were discovered distributed over eleven distinct loci. Allele frequencies for SNPs from ten of these loci were determined and reported for a panel of 71 sheep comprising 58 unrelated sheep from the Rylington Merino flock plus a further 13 unrelated parental animals from a three generation half sibling sheep pedigree. The availability of an independently confirmed pedigree constructed from a three generation half sibling sheep family permitted the identification by deduction of central region MHC haplotypes based on a panel of SNPs derived from 10 loci. This is the first reporting of haplotypes covering this region of the sheep MHC. Analysis of SNP panel genotypes in the cohort of 71 unrelated sheep using the expectation maximization algorithm permitted the prediction of a group of approximately 20 haplotypes, which accounted for more than 90% of the expected haplotype distribution. Four of these predicted haplotypes were also present in the known haplotype cohort deduced from the sheep pedigree. Analysis of pairwise linkage disequilibrium between SNP loci in the cohort of 71 unrelated sheep showed a centre-most region displaying relatively high levels of linkage disequilibrium which was bounded by two regions displaying more variable linkage disequilibrium.
It is hypothesised that this mid region of the central region of the sheep MHC may be a block like structure characterized by low recombination similar to those that have been widely described in the human and mouse genomes. The discoveries reported in this thesis provide a more accurate and detailed description of the central region of the sheep MHC together with a panel of SNPs, which reflect the diversity of this important genomic region which is known to be associated with immune responsiveness. The description, for the first time, of central region haplotypes provides a practical means of seeking candidate loci associated with disease resistance and productivity traits. The application of molecular techniques will enhance the rate at which the genomic composition of this region is elucidated and the work described in this thesis will contribute to final characterization of this important complex in health and disease.
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Meadows, Laurie E. "Efficacy of Guard Llamas (Lama glama) in Reducing Canid Predation on Domestic Sheep." DigitalCommons@USU, 1999. https://digitalcommons.usu.edu/etd/6584.

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Predation, especially by canid predators, is a significant cause of sheep loss for many producers. In recent years, the use of llamas to protect sheep from predators has gained recognition as a depredation control method. I conducted a field experiment to test the effectiveness of llamas in reducing canid predation on domestic sheep. Twenty-one llamas were placed with Utah sheep producers. Data collected from these flocks over 20 months were compared to similar data collected from flocks without llamas. Comparisons between treatment and control flocks included (l) proportion of flocks with losses to predators, (2) mean predation rates on ewes and lambs, and (3) lamb predation rate distributions. Two surveys were conducted during the study to assess producer opinions on the inclusion of llamas in their sheep management programs. In all 3 comparisons of lamb losses between treatments and controls, losses sustained by control flocks in Lambing Season l (LS l) were significantly higher than those of flocks with llamas. Among treatment flocks, losses were similar for LS l and Lambing Season 2 (LS2). Among controls, LS2 losses dropped to the level of treatment flocks. My results suggest predation may have to reach some threshold before guard llamas have an effect on losses. Results of surveys of producers with llamas indicated they support the use of llamas as guard animals for sheep.
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Fleming, Peter J. S., and n/a. "Relationships between feral goats (Capra hircus) and domestic sheep (Ovis aries) with reference to exotic disease transmission." University of Canberra. Resource, Environmental & Heritage Sciences, 2004. http://erl.canberra.edu.au./public/adt-AUC20050714.142151.

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Merino sheep are the most numerous domestic livestock in Australia and feral goats are wide-spread and locally abundant in many of the regions where sheep are grazed. Foot and mouth disease (FMD) is a disease of ungulates that causes severe economic hardship to countries where outbreaks occur or where it has become endemic. In India, Africa, Greece and recently the United Kingdom and Eire, sheep and goats have been implicated in the spread and maintenance of FMD. In Australia, there are contingency plans (AUSVETPLANS) for dealing with an outbreak of FMD. Included in those plans are strategies for control of the disease in feral ungulates including feral pigs and feral goats. Modelling has provided assistance in developing strategies to combat outbreaks in feral pigs and for controlling outbreaks in domestic livestock. No models have been constructed to aid decisions about controlling FMD in feral goats where they co-occur with merino sheep. In Australia, the greatest densities of free-ranging feral goats and domestic livestock occur in the high rainfall zone (> 500 mm mean annual rainfall) along the eastern tablelands and adjacent slopes of the Great Dividing Range. Previous studies of feral goat biology, population dynamics and behaviour in Australia have concentrated on arid and semi-arid zones or on islands. Interactions between free ranging feral goats and merino sheep have not previously been studied in the high rainfall zone. My study investigated the ecological and behavioural characteristics of feral goats and their interactions with sympatric merino sheep at a high rainfall site in central eastern New South Wales. The population dynamics, biological and behavioural parameters of feral goats and sheep were then used to model FMD in such an environment. Deterministic temporal models and a new spatial stochastic model were used. Of particular interest were the rates of contact within and between subgroups of feral goats (termed herds and mobs), within and between subgroups of merino sheep (termed flocks and mobs), and between subgroups of the two species. Feral goats at the study site were found to be numerous (mean density = 34.94 goats km-2, from aerial surveys), in good condition, fecund and had high adult survival and low annual adult mortality (survival= 0.81�1.00) in the absence of harvesting and hunting. They had an observed instantaneous rate of increase of 0.112 per year. Annual rate of increase was similar to other sites in Australia without sustained harvesting pressure. Home ranges were small for both males (3.754 km², s.e. = 0.232, n = 116 goats) and females (2.369 km², s.e. = 0.088, n = 241 goats). From this and other Australasian studies, an inverse power function was found to be an excellent descriptor of the relationship between mean annual rainfall and female home range size. A resource selection function was fitted in a geographic information system to observational data of feral goats. The habitat selection of feral goats included a preference for wooded vegetation on eastern and north eastern aspects at higher elevations. The resource selection function was also used to set the probabilities of occurrence of feral goats in 1 ha areas of the landscape and these probabilities were used to generate heterogeneity in a spatial model of foot and mouth disease virus (FMDV) transmission. Daily per capita contact rates were estimated from observed contacts in the field where a contact between individuals was recognised when one approached within 1 body length ([approx] 1m) of another. The contacts between feral goats within herds were frequent and occurred at a rate of 6.96 (s.e. = 1.27) goat�goat contacts day-1. Sheep to sheep contacts were slightly less frequent (4.22 sheep�sheep contacts day-1, s.e. = 0.65) but both estimates were most likely negatively biased because of observer errors in estimating the number of individual animals coming in contact with observation subject (focal) animals. Contacts between herds of feral goats were not common and those between adjacent populations were fewer than 1 per year. In sheep, flock to flock contact was largely governed by husbandry practices and occurred at a mean daily rate of 0.0014 flock�flock contacts. Contacts between sheep and feral goats were less frequent but nonetheless common (2.82 goat�sheep contacts day-1, s.e. = 0.40). In feral goats the size of the mob in which focal goats were observed was found to be the most important factor in determining contact rates between individuals and a counter-intuitive inverse relationship was identified. Contacts were heterogeneous and density was not an important determinant of contact rates implying that, because of the uniformly high densities at the site, saturation had occurred. The temporal models of FMDV transmission showed that the rate of contact within and between species was such that FMD was predicted to spread rapidly throughout an infected herd or flock. Control strategies of intense culling of feral goats at the population level were predicted to allow the disease to persist at low prevalence, with a small peak corresponding to the annual lambing pulse in sheep. However, the same level of control (>90% reduction) at the herd level was predicted to eliminate FMD and allow the safe reintroduction of sheep. Extreme control that left very small groups (<3 individuals) may be counter productive because such small groups are likely to join the reintroduced sheep in an effort by the goats to meet gregarious urges. The spatial model was more reassuring. It predicted that FMD would die out in a mixed sheep and feral goat population in less than 90 days because of the low rate of herd to herd contact and herd to flock contact. For similar environments, the contingency planning consequences are that an outbreak of FMD introduced into feral goats from sympatric sheep is likely to be containable by removing all the sheep, determining the extent and likely range of the feral goats, then removing a substantial proportion of or eradicating each herd. Feral goats, being relatively sedentary, are unlikely to spread to adjacent populations and the disease will die out through lack of contact between herds and populations. Because feral goat home ranges overlap and are centred on one or two small catchments, a containment ring of feral goat control, set to encompass the home range of a target herd and that of adjacent herds, should be adequate to limit spread of FMD.
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Nugent, Russell A. III. "Effects of breed and ram exposure on Spring estrous behavior and Summer fertility in domestic ewes." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/44057.

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The present studies were conducted to check the effects of acute ram introduction into a flock of anestrus ewes in Virginia. Ewes were bled via jugular venipuncture twice weekly and serum samples were radioimmunoassayed for progesterone (P4) content as an indicator of estrous activity. All rams were fitted with crayon equipped marking harnesses for use as an indicator of mating behavior in ewes. The first study tested the effects of introduction of vasectomized rams into a flock: of' 50 Dorset (D) and 50 Hampshire (H) purebred ewes in either May or June. More D ewes ovulated (96% vs 72% for H ewes) and mated (80% vs 20% for H ewes) in May. Of ewes which mated in May 65% D but no H ewes continued to cycle in June after removal of rams. Of ewes exposed to rams in June no difference among breeds was observed in percentage of ewes ovulating but more D ewes (72%) mated than H ewes (44%). Twenty-four percent of D but no H ewes cycled continuously throughout the 68 d or the study. Lambing date significantly affected mating behavior in H but not D ewes. The second study tested the effects of ram breed on incidence of mating and subsequent lambing in Rambouillet x Q Suffollk ewes In June and July of 1984 and 1985. Ewes were Q pre-exposed to either confined Suffolk (S) or Dorset (D) Q yearling rams or no (N) ram for 2 wk prior to breeding by Q either S or D rams. Lambing date was significantly affected by breeding treatment in 1984 and by pre-exposure treatment in 1985. Sixty-three percent of the ewes lambed in 1984 while 65% lambed in 1985.
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Gates, Peter J. "Analyzing categorical traits in domestic animal data collected in the field /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5473-5.pdf.

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Baum, Elizabeth M. "Monitoring Domestic Sheep Energy Requirements and Habitat Selection on Summer Mountain Range Using Low-Cost GPS Collar Technology." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/9177.

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With the advent of global position system (GPS) collar technology, we have developed a much greater understanding of the temporal and spatial distribution of livestock and their associated grazing patterns. While significant research using GPS collars has been reported for cattle, little research is available describing collar use in understanding the behavior of domestic sheep. The purpose of our research was to evaluate the energy requirements of sheep with the use of GPS collars. To accomplish this, we adapted a low-cost i-gotU GPS tracking device that is typically designed for cattle and modified it to fit sheep. Each collar was programmed to record sheep movements within four grazing habitat types during different times of the year. Habitat types included spring pasture (SP), spring low hill habitat (SH), summer mountain habitat (MH) and winter desert habitat (DH). We divided our research into two studies: 1) to track and compare energy expenditure of domestic sheep between four habitats using collars for recording sheep movements, and 2) to model summer mountain selection by sheep using the collar derived coordinate positions and environmental variables in an RSF model process. We hypothesized that there would more energy expended while out on desert habitat in comparison to other range habitats and sheep would select for sites on summer mountain habitat that were close to water, gentle in terrain, and higher in elevation. We used sheep energy equations to determine the energy requirement. Collar derived coordinates were used to measure the horizontal distance traveled on flat terrain or vertical distances both upslope and downhill across variable terrain. Our results found that total distance traveled was not different between SP, SH and MH at 6.7, 7.1 and 6.9 km/d, respectively, however, total movement was different (P<0.05) on DH at 10.5 km/d. Sheep movement was greater (P<0.05) on slopes (altitude change in 3m between waypoints) versus flat terrain (movement between waypoints >20m). For example, sheep spent 65% of movement on slope and 39% on flat movement for SH, 86% of movement was spent on slope and 16% on flat terrain for MH, and 89% of movement was spent on slope and 11% movement was on flat for DH. Total energy required between the four habitats was different (P<0.05) at 5.9, 8.6, 7.1 and 13.9 Mcal ME/d for SP, SH, MH and DH respectively. While on summer MH sheep avoided slopes and rugged terrain, but selected for sites close to water, northern facing aspects and areas higher in elevation. We found that sheep expend the most energy on DH and sheep on MH will select for gentle terrain, areas close to water, northern facing slopes, higher elevation and avoid slopes. With this insight, sheep managers can better meet energy requirements needs and understand habitat utilization of their flocks.
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Books on the topic "Domestic sheep"

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Sheep. Minneapolis: Lerner Publications, 2009.

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Bolam, Emily. Sheep. Hauppauge, NY: Barron's, 2000.

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Schommer, Timothy J. A review of disease related conflicts between domestic sheep and goats and bighorn sheep. Fort Collins, CO: U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Research Station, 2008.

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Moncure, Jane Belk. Ice-cream cows and mitten sheep. Elgin, Ill: Child's World, 1988.

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ill, Apple Margot, ed. Sheep trick or treat. Boston: Houghton Mifflin, 1997.

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ill, Enik Ted, and King-Smith Dick, eds. Babe, the sheep pig--going quackers. New York: Random House, 1999.

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illustrator, Apple Margot, ed. Sheep trick or treat. New York: Scholastic, 1997.

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ill, Urbanovic Jackie, ed. No sleep for the sheep! Boston: Houghton Mifflin Harcourt, 2010.

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Abbott, Kym. The Practice of Sheep Veterinary Medicine. Adelaide: University of Adelaide Press, 2018.

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The day the sheep showed up. New York: Scholastic, 1998.

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Book chapters on the topic "Domestic sheep"

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Kaufmann, Johannes. "Parasites of Sheep and Goats." In Parasitic Infections of Domestic Animals, 145–201. Basel: Birkhäuser Basel, 1996. http://dx.doi.org/10.1007/978-3-0348-7666-7_4.

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Lawrence, A. B., and D. G. M. Wood-Gush. "Investigations on Social Space in Open and Restricted Environments in Sheep." In Social Space for Domestic Animals, 171–91. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5040-5_17.

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Forbes, Andrew B. "The origin and evolution of parasitism in domestic ruminants." In Parasites of cattle and sheep: a practical guide to their biology and control, 1–9. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789245158.0001.

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Simm, Geoff, Geoff Pollott, Raphael Mrode, Ross Houston, and Karen Marshall. "The origins and rôles of today's livestock breeds." In Genetic improvement of farmed animals, 1–10. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789241723.0001.

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Abstract The huge variety of animal and other species that we see today, together with those now extinct, evolved by the process of natural selection. The key to natural selection, and to the artificial selection practised by breeders, is the inherited variation in many characteristics that exists between individual animals. Domestication of animals began 12,000 to 10,000 years ago. Whether or not it has been done knowingly, artificial selection, as well as natural selection, has been practised among domestic animals ever since then. Although distinct breeds or strains of cattle and sheep existed long before then, the practices of pedigree recording and selection of related animals with the aim of breed improvement date from the mid-1700s. The formation of herd books began early in the following century. Livestock continue to have a wide range of important rôles globally, with a range of positive and negative societal and environmental impacts, which need to be managed and balanced.
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Pikorova, Tina, Petr Hlavinek, and Petra Pagacova. "Comparison of Two Flat Sheet Membrane Modules Used in a Real Domestic Wastewater Treatment Plant." In Advanced Water Supply and Wastewater Treatment: A Road to Safer Society and Environment, 303–12. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-94-007-0280-6_29.

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"Domestic sheep." In Tracks and Signs of the Animals and Birds of Britain and Europe, 266–67. Princeton University Press, 2013. http://dx.doi.org/10.1515/9781400847921.266.

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"Ovis aries, the domestic sheep." In Animals in Stone, 352–62. BRILL, 2008. http://dx.doi.org/10.1163/9789047443568_034.

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LINDSAY, D. R. "Reproduction in the Sheep and Goat." In Reproduction in Domestic Animals, 491–515. Elsevier, 1991. http://dx.doi.org/10.1016/b978-0-08-057109-6.50020-3.

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"Mastitis in Sheep and Goats." In Jubb, Kennedy & Palmer's Pathology of Domestic Animals, 562–63. Elsevier, 2007. http://dx.doi.org/10.1016/b978-070202823-6.50193-7.

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Bennett, C. E. "Parasites of domestic livestock: (b) Sheep and Fasciola hepatica (Trematoda)." In Practical Exercises in Parasitology, 53–62. Cambridge University Press, 2001. http://dx.doi.org/10.1017/cbo9781139173353.008.

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Conference papers on the topic "Domestic sheep"

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Chow, T. T., J. Ji, and W. He. "Photovoltaic-Thermal Collector System for Domestic Application." In ASME 2005 International Solar Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/isec2005-76128.

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Photovoltaic-thermal (PV/T) systems integrate photovoltaic and solar thermal technologies into one single system with dual production of electricity and heat energy. A typical arrangement is the direct attachment of PV modules on to a solar thermal collector surface. For a given collector surface area, the overall system energy performance is expected higher than the conventional “side-by-side” PV and solar thermal systems. In the development of PV/T collector technology using water as the coolant, the most common design follows the sheet-and-tube thermal absorber concept. Fin performance of the thermal absorber has been identified as one important factor that affects much the overall energy performance of the collector. Accordingly, an aluminum-alloy flat-box type PV/T collector prototype was constructed and tested. Our test results indicate that a high combined thermal and electrical efficiency can be achieved. The primary-energy-saving efficiency for daily exposure approaches 65% at zero reduced temperature operation. With a simple and handy design, the product is considered to be very suitable for domestic application.
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Zhong, Liang, Gaofeng Wang, and Yifan Xia. "Infrared Thermography to Measure Heat Transfer of a Heated Curved Thin Sheet." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86172.

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Heat transfer measurements on a heated curved thin sheet are performed by infrared thermography. The evolution of the temperature field is recorded to calculate the heat flux by using the two-dimensional unsteady heat balance equation. The thermal conduction term is estimated by the projection relationship between the curved surface of the thin sheet and the horizontal plane. Natural convection is neglected during the estimation of this heat flux. Unlike the traditional means of heat flux measurement, this method is non-intrusive and can measure the heat flux distribution within a curved space, allowing an easier evaluation of the errors due to radiation and tangential conduction. An electrical resistance foil with known power are applied as the heating source to compare the calculated heating power with the actual recorded power, the max relative error for different heating powers is about 10 %, which verified of the feasibility of the method. Considering possible applications, three different domestic gas cookers are used to heat three different curved thin pans, and then, in each case, the heat flux of the burners is analyzed. From the heat flux distribution of the three gas cookers, some heating characteristics such as heating power, maximum and average heating flux are investigated to help optimize the designs of the gas cookers, avoiding local overheating and low uniformity of heat distribution.
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McDonald, John. "Citrus Packaging and the Environment." In ASME 1990 Citrus Engineering Conference. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/cec1990-3602.

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Say the word “environment” today, and most likely you will generate some sort of a response. It’s one of our society’s hot issues and we have seen Washington, from President Bush on down, and many of our states and cities jumping on the environmental issue because there are real problems that need to be solved and, in addition, it appears to be good politics. Solid waste is part of the environmental issue and packaging is part of solid waste. So, I would like to take you through how we, at Continental Can, are looking at this. We are one of the leading packaging producers with seven domestic divisions producing aluminum cans, steel and bi-metal cans, PET plastic bottles, extrusion blow molded plastic bottles from HDPE, PP, PVC, with multilayers and multimaterial barriers, and thermo formed microwave trays and tubs and aseptic cups mostly made from plastic multimaterial barrier sheet which we extrude. Continental also annually produces over 6 billion metal vacuum “twist off” closures, some plastic closures and our Bondware division produces paper and plastic coated paper containers mostly or fast food outlets. Paper published with permission.
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Freimanis, Kristaps, and Maija Šenfelde. "Credit creation theory and financial intermediation theory: different insights on banks’ operations." In Contemporary Issues in Business, Management and Economics Engineering. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/cibmee.2019.033.

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Purpose – already for more than one hundred years there is an ongoing discussion about the role and function of banks, which subsequently has affected banking regulation. Three theories of banking were dominant in different periods of the 20th century: Credit creation theory (the oldest), Fractional reserve theory, Financial intermediation theory. Authors are contributing to the theoretical discussion with research showing that Credit creation theory and Financial intermediation theory reflect different insights on banks’ operations. Research methodology – literature review (regarding theories), financial ratio calculations (Loans-to-Deposits ratio); Findings – using Loans-to-Deposits ratio calculations for several banks researchers have found that banks’ lending process can be explained by Credit creation theory however banks’ Strategic Asset-Lability Management can be explained by Financial intermediation theory. Research limitations – (a) only domestic banks were selected as in this research it is important to get the needed relationship between deposits and lending. Subsidiaries of foreign banks could have not balanced balance sheet from Loansto-Deposits ratio perspective as their funding could come from abroad if the business model in Baltics is primarily lending oriented, (b) Baltic market was taken because of know-how of researchers about banks operations here and history of their transformation, (c) audited financial reports were used as they gave a sufficient picture of banks Loansto-Deposits ratio. Practical implications – theoretical discussion in this paper enlightens the role and function of the banks thereby improving understanding of better banking regulation. Authors propose to adjust the current banking regulatory framework which is focused on capital requirements. Originality/Value – current research provides some link between existing banking theories (Credit creation theory and Financial intermediation theory) shaping a new hybrid concept and proposing an adjusted regulatory framework based on this hybrid concept
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Reports on the topic "Domestic sheep"

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Schommer, Timothy J., and 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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Miller, Cindy. Navy Domestic Technology Transfer Fact Sheet: 1986 Statistics. Fort Belvoir, VA: Defense Technical Information Center, June 1987. http://dx.doi.org/10.21236/ada198217.

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Mugnier, Daniel. INFO Sheet A15: Reference multi-family solar domestic hot water system. France. IEA SHC Task 54, September 2018. http://dx.doi.org/10.18777/ieashc-task54-2018-0005.

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Reiter, Christoph, Dr Sebastian Brandmayr, Dr Christoph Trinkl, and Prof Dr Ing Wilfried Zörner. IEA-SHC Task 39 INFO Sheet B12 - Conceptual solar domestic hot water systems. IEA Solar Heating and Cooling Programme, May 2015. http://dx.doi.org/10.18777/ieashc-task39-2015-0010.

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Mugnier, Daniel. INFO Sheet A17: Reference single family solar domestic hot water system for France. IEA SHC Task 54, October 2017. http://dx.doi.org/10.18777/ieashc-task54-2017-0001.

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Fabiani, Andrea, Martha López, José-Luis Peydró, Paul E. Soto, and Margaret Guerrero. Capital Controls, Domestic Macroprudential Policy and the Bank Lending Channel of Monetary Policy. Banco de la República, June 2021. http://dx.doi.org/10.32468/be.1162.

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We study how capital controls and domestic macroprudential policy tame credit supply booms, respectively targeting foreign and domestic bank debt. For identification, we exploit the simultaneous introduction of capital controls on foreign exchange (FX) debt inflows and an increase of reserve requirements on domestic bank deposits in Colombia during a strong credit boom, as well as credit registry and bank balance sheet data. Our results suggest that first, an increase in the local monetary policy rate, raising the interest rate spread with the United States, allows more FX-indebted banks to carry trade cheap FX funds with more expensive peso lending, especially toward riskier, opaque firms. Capital controls tax FX debt and break the carry trade. Second, the increase in reserve requirements on domestic deposits directly reduces credit supply, and more so for riskier, opaque firms, rather than enhances the transmission of monetary rates on credit supply. Importantly, different banks finance credit in the boom with either domestic or foreign (FX) financing. Hence, capital controls and domestic macroprudential policy complementarily mitigate the boom and the associated risk-taking through two distinct channels
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Ramschak, Thomas, and François Veynandt. INFO Sheet A04: Reference System, Austria Solar domestic hot water system for single-family house. IEA SHC Task 54, November 2017. http://dx.doi.org/10.18777/ieashc-task54-2017-0004.

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Ramschak, Thomas, and François Veynandt. INFO Sheet A06: Reference System, Austria Solar domestic hot water system for multi-family house. IEA SHC Task 54, November 2017. http://dx.doi.org/10.18777/ieashc-task54-2017-0006.

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Bachmann, Stephan, Stephan Fischer, and Bernd Hafner. INFO Sheet A08: Reference System, Germany Solar domestic hot water system for single family house. IEA SHC Task 54, November 2017. http://dx.doi.org/10.18777/ieashc-task54-2017-0008.

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Philippen, Daniel, and Marco Caflisch. INFO Sheet A11: Reference System, Switzerland Solar domestic hot water system for multi-family house. IEA SHC Task 54, November 2017. http://dx.doi.org/10.18777/ieashc-task54-2017-0010.

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