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Journal articles on the topic 'Domestic sheep'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

Fox, K. A., S. Wootton, A. Marolf, N. Rouse, I. LeVan, T. Spraker, M. Miller, and S. Quackenbush. "Experimental Transmission of Bighorn Sheep Sinus Tumors to Bighorn Sheep (Ovis canadensis canadensis) and Domestic Sheep." Veterinary Pathology 53, no. 6 (July 11, 2016): 1164–71. http://dx.doi.org/10.1177/0300985816634810.

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12

Lahmar, S., M. Trifi, S. Ben Naceur, T. Bouchhima, N. Lahouar, I. Lamouchi, N. Maâmouri, R. Selmi, M. Dhibi, and P. R. Torgerson. "Cystic echinococcosis in slaughtered domestic ruminants from Tunisia." Journal of Helminthology 87, no. 3 (September 12, 2012): 318–25. http://dx.doi.org/10.1017/s0022149x12000430.

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AbstractA total of 10,818 domestic ruminants (3913 cattle, 2722 sheep, 3779 goats, 404 dromedaries) slaughtered in various abattoirs in Tunisia between 2003 and 2010 were examined for the presence of Echinococcus granulosus hydatid cysts. The prevalence of cystic echinococcosis (CE) was 16.42% in sheep, 8.56% in cattle, 5.94% in dromedaries and 2.88% in goats. CE prevalence increased with age according to an asymptotic model and there was evidence of variation in infection pressure depending on the region of Tunisia where the animals were slaughtered. Cattle appeared to have the highest infection pressure of the species examined. The mean intensity of hepatic cysts was higher than that of pulmonary cysts in all species. The highest mean intensity of infection with E. granulosus larvae was observed in cattle (18.14) followed by sheep (9.58), goats (2.31) and dromedaries (2.12). The abundance of infection increased in a linear fashion with age in all animal species. Cyst abundance varied with species of animal and district of Tunisia. Cysts from dromedaries were more fertile (44.44%) than those from sheep (30.25%), goats (30.32%) and cattle (0.95%). The viability of the protoscoleces from fertile cysts from cattle (78.45%) was higher than those from sheep (70.71%) and camels (69.57%). The lowest protoscolex viability was recorded for hydatid cysts from goats (20.21%). This epidemiological study confirms the importance of CE in all domestic ruminant species, particularly in sheep, throughout Tunisia and emphasizes the need to interrupt parasite transmission by preventive integrated approaches in a CE control programme.

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13

Wang, Shuai, Lingjuan Li, Yi Lu, Haizhu Zhang, Qing Xie, and Zhenchao Zhang. "Seroprevalence and risk factors of Neospora caninum infection among domestic sheep in Henan province, central China." Parasite 25 (2018): 15. http://dx.doi.org/10.1051/parasite/2018019.

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This study aimed to determine the frequency of antibodies to Neospora caninum in domestic sheep raised in Henan province, central China. Serum samples from 779 domestic sheep were collected from March 2015 to May 2016, and antibodies to N. caninum were evaluated using an enzyme-linked immunosorbent assay (ELISA). The results showed an overall IgG positive rate of 7.32% (57/779). The risk factors significantly related to seropositivity to N. caninum in sheep were the age, the presence of dogs, and the rearing system. This is the first report of N. caninum infection and associated risk factors in domestic sheep in central China.

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14

Konradt, Guilherme, Daniele M. Bassuino, Klaus S. Prates, Matheus V. Bianchi, Gustavo G. M. Snel, Luciana Sonne, David Driemeier, and Saulo P. Pavarini. "Suppurative infectious diseases of the central nervous system in domestic ruminants." Pesquisa Veterinária Brasileira 37, no. 8 (August 2017): 820–28. http://dx.doi.org/10.1590/s0100-736x2017000800007.

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ABSTRACT: This study describes suppurative infectious diseases of the central nervous system (CNS) in domestic ruminants of southern Brazil. Reports from 3.274 cattle, 596 sheep and 391 goats were reviewed, of which 219 cattle, 21 sheep and 7 goats were diagnosed with central nervous system inflammatory diseases. Suppurative infectious diseases of the CNS corresponded to 54 cases (28 cattle, 19 sheep and 7 goats). The conditions observed consisted of listerial meningoencephalitis (8 sheep, 5 goats and 4 cattle), suppurative leptomeningitis and meningoencephalitis (14 cattle, 2 goats and 1 sheep), cerebral (6 cattle and 2 sheep), and spinal cord (7 sheep) abscesses, and basilar empyema (4 cattle and 1 sheep). Bacterial culture identified Listeria monocytogenes (9/54 cases), Escherichia coli (7/54 cases), Trueperella pyogenes (6/54 cases) and Proteus mirabilis (1/54 cases). All cases diagnosed as listeriosis through histopathology yielded positive immunostaining on immunohistochemistry, while 12/17 of the cases of suppurative leptomeningitis and meningoencephalitis presented positive immunostaining for Escherichia coli. Meningoencephalitis by L. monocytogenes was the main neurological disease in sheep and goats, followed by spinal cord abscesses in sheep. In cattle, leptomeningitis and suppurative meningoencephalitis was the most frequent neurological disease for the species, and E. coli was the main cause of these lesions. Basilar empyema, mainly diagnosed in cattle, is related to traumatic injuries, mainly in the nasal cavity, and the main etiologic agent was T. pyogenes.

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15

mavrogenis, A. P., and A. Herzogi. "INTERSPECIFIC HYBRIDIZATION OF THE CYPRUS MOUFLON (AGRINON) WITH DOMESTIC SHEEP." Animal Genetic Resources Information 7 (April 1990): 23–27. http://dx.doi.org/10.1017/s1014233900002972.

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SUMMARYAll interspecific hybrids, both male and female, resulting from crosses between the wild sheep of- Cyprus (known locally as Aqrinon) and domesticated sheep breeds (Ovis aries), Cyprus Fat-tailed (CFT), Chios an Awassi, were found to be fertile.The chromosome complement of both species and of the hybrids was 2n=54. The survival.rate of hybrid lambs up to 105 days of age increased with a higher percentage of domesticated sheep inheritance. F2 hybrids had the lowest survival rate.The birth weight of F1 and first backcross to domestic sheep (B,) lambs was higher than that of F2 and F1 × B1 lambs, but much lower thin that of domesticated sheep.Most of the evidence available suggests that the wild sheep of Cyprus originates from either the European (ovis musimon) or the Asiatic' (Ovis orientalis) mouflon.

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16

Ward, A. C. S., D. L. Hunter, M. D. Jaworski, P. J. Benolkin, M. P. Dobel, J. B. Jeffress, and G. A. Tanner. "PASTEURELLA SPP. IN SYMPATRIC BIGHORN AND DOMESTIC SHEEP." Journal of Wildlife Diseases 33, no. 3 (July 1997): 544–57. http://dx.doi.org/10.7589/0090-3558-33.3.544.

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17

Lankin, V. "Factors of diversity of domestic behaviour in sheep." Genetics Selection Evolution 29, no. 1 (1997): 73. http://dx.doi.org/10.1186/1297-9686-29-1-73.

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18

Deng, Juan, Xing-Long Xie, Dong-Feng Wang, Chao Zhao, Feng-Hua Lv, Xin Li, Ji Yang, et al. "Paternal Origins and Migratory Episodes of Domestic Sheep." Current Biology 30, no. 20 (October 2020): 4085–95. http://dx.doi.org/10.1016/j.cub.2020.07.077.

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19

DU, XIAOHUA, XIA LIU, and JAMES BLACKAR MAWOLO. "Comparison of neuroglobin expression in the retina of Tibetan sheep (Ovis ammon or argali ) and domestic sheep (Ovis aries )." Medycyna Weterynaryjna 77, no. 04 (2021): 6512–2021. http://dx.doi.org/10.21521/mw.6512.

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Neuroglobin (Ngb) is a member of the globin member that is mainly expressed in the brain and retina. The expression in the retina is greater than it is in the brain because of the high demand for oxygen by the retina. This protein reversibly binds oxygen and is involved in oxygen transport or protection against oxidative stress. The study aims to explore the pattern of Ngb expression in Tibetan sheep (Ovis ammon or argali ) living in a plateau region and domestic sheep (Ovis aries) dwelling on low land. The study also provides detailed insight into the morphological characteristics of Ngb distribution closely related to oxygen metabolism in the retina of Tibetan and domestic sheep. Immunohistochemical staining procedures were performed to detect the Ngb protein expression in the retinae of both sheep, while the Inter’s integrated performance primitives (IPP) semi-quantitative analysis was employed to compare the quantities of Ngb expressed in the retinae of the two types of sheep. The outer nuclear layer and the outer segment of the photoreceptor showed a negative Ngb expression, while a weak positive expression was observed in the inner core layer and ganglion cell layer, while a strong positive expression was found in the other layers. The independent T-test revealed that the expression intensity in the nerve fiber layer, inner and outer plexus layers, inner segment of the photoreceptor, and superior pigment cortex were significantly higher in the Tibetan sheep as compared to the domestic sheep. The overall Ngb expression in the Tibetan sheep was higher than the domestic sheep. The study emphasized that the different Ngb expression in the Tibetan and domestic sheep may influence their adaptation to the respective environments. The stronger Ngb expression in the retina of Tibetan sheep may indicate that Ngb is closely related to the oxygen metabolism of these animals and has a function during oxygen transport.

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20

Cunha, Cristina W., Owen M. Slater, Bryan Macbeth, Pádraig J. Duignan, Amy Warren, Margaret A. Highland, and Hong Li. "Domestic sheep and bighorn sheep carry distinct gammaherpesviruses belonging to the genus Macavirus." Virus Research 272 (October 2019): 197729. http://dx.doi.org/10.1016/j.virusres.2019.197729.

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21

Caola, Giovanni, Stefania Casella, Claudia Giannetto, and Giuseppe Piccione. "Daily locomotor activity in five domestic animals." Animal Biology 60, no. 1 (2010): 15–24. http://dx.doi.org/10.1163/157075610x12610595764057.

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AbstractThe aim of this study was to compare locomotor activity in five domestic animals. Five female Comisana sheep, five female Maltese goats, five female Bruna cows, and five female Thoroughbred horses were housed separately in a soundproof box equipped with an airflow system and five female Blue Vienna rabbits were individually housed in metallic cages. Animals were kept under a 12/12 Light/Dark cycle and indoor ambient temperature (16-20°C). To record activity, an Actiwatch-Mini® was placed on each animal by means of a collar. Analysis by the cosinor procedure indicated a daily rhythm of locomotor activity in each of the five species studied. The main activity was observed during the photophase in sheep, goats, cows and horses, and during the scotophase in rabbits. The comparison among the species studied underlined a stable daily rhythm of locomotor activity in cows and horses, while sheep, goats and rabbits showed a weak daily rhythm of locomotor activity.

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22

Ménsua, C., L. Carrasco, M. J. Bautista, E. Biescas, A. Fernández, C. L. Murphy, D. T. Weiss, A. Solomon, and L. Luján. "Pathology of AA Amyloidosis in Domestic Sheep and Goats." Veterinary Pathology 40, no. 1 (January 2003): 71–80. http://dx.doi.org/10.1354/vp.40-1-71.

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We describe the main pathologic changes in small ruminants affected by AA amyloidosis, together with the partial sequence of the protein involved. Twenty-one sheep and one goat were selected for presenting macroscopic kidney lesions compatible with systemic amyloidosis. Available tissue samples were studied by histologic, immunopathologic, and ultrastructural means. Renal lesions were characterized grossly by pale cortical surfaces with scattered, miliary, whitish-yellow foci and on cut cortical surfaces by straight, whitish-yellow striations. Gangrenous pneumonia was observed in 16 out of 21 affected sheep (76.2%), although other chronic inflammations were also observed. Amyloid was detected in all grossly affected kidneys using Congo red staining, lesions being most remarkable in glomeruli, affecting 95.5% of animals studied. Congophilic deposits were also observed in intertubular interstitium (68.2%) and medulla (57.1%). All amyloid-affected animals presented proximal convoluted tubule lesions, mostly characterized by an increase in diameter and by hyaline granular degeneration that were responsible for the macroscopic appearance of the kidney. Histologically, amyloid was also seen in blood vessels, spleen, liver, lymph nodes, gastrointestinal tract, and adrenal glands. All amyloid deposits demonstrated greenish-yellow birefringence with polarized light, and the antisera prepared against goat amyloid extracts specifically reacted with birefringent congophilic deposits of both sheep and goats. Ultrastructurally, these deposits were formed by masses of straight, nonbranching fibrils located predominantly in the basement membranes of glomerular capillaries and in the mesangium. Partial sequence of the protein in sheep and goats indicated a high degree of homology with the previously reported sequence of sheep Serum Amyloid A.

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23

Ford, GE. "Role of the dog, fox, cat and human as carnivore vectors in the transmission of the Sarcosporidia that affect sheep meat production." Australian Journal of Agricultural Research 37, no. 1 (1986): 79. http://dx.doi.org/10.1071/ar9860079.

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The roles of six carnivores as potential sources to sheep of the sarcosporidial parasites causing cysts in meat were compared in a series of experiments carried out between 1973 and 1980. The research was concomitant with other studies that confirmed the prey-predator-prey-predator cycle of transmission. Infected carnivores act as vectors, excreting in their faeces coccidial sporocysts infective to the meat animal. For 60 experimental infections, sheep meat containing sarcocysts or sarcocysts removed from sheep meat were fed to experimental carnivores. Faecal samples were examined for sporocysts over 60 days post infection. Neither macroscopic (visible) sarcocysts nor microscopic sarcocysts from sheep carcasses were transmissible by humans or by ferrets (domestic polecats). Microscopic sarcocysts were readily infective to dogs, both domestic and dingo, as well as to foxes, but not to cats. Large numbers of sporocysts that could contaminate the environment were excreted. Both fat and thin visible sarcocysts were transmitted exclusively to cats. Although cats responded with relatively low levels of sporocysts, these were considered adequate to provide sufficient pasture contamination for the life cycle to be perpetuated. It is concluded that, while domestic dogs may be the greatest source of infection for sheep with microscopic sarcocysts, foxes as vectors also pose a threat to sheep production. Similarly, due to their widespread presence, feral cats play a role as well as domestic or semi-domestic cats in the spread of sarcocysts causing visible carcass lesions.

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24

Miller, SM, JD Brooker, and LL Blackall. "A feral goat rumen fluid inoculum improves nitrogen retention in sheep consuming a mulga (Acacia aneura) diet." Australian Journal of Agricultural Research 46, no. 8 (1995): 1545. http://dx.doi.org/10.1071/ar9951545.

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Rumen micro-organisms which are resistant to high levels of condensed tannins (CT) may constitute a unique response by feral goats to the nutritive depressing effects of mulga (Acacia aneura) CT. Transferring these micro-organisms to domestic livestock lacking this response may be beneficial when CT-rich mulga diets are consumed. Three experiments were conducted in which sheep consuming a mulga diet were given a ruminal inoculation of feral goat rumen fluid (FGRF). Feed intake and nitrogen (N) retention were significantly greater (P < 0.05) in both sheep and domestic goats following inoculation and in inoculated compared with uninoculated sheep. Inoculation also improved N digestibility and reduced the rate of liveweight loss in sheep and domestic goats. These improvements were of similar magnitude to those attributable to the traditional N, phosphorus and sulfur mineral supplement for mulga fed sheep. FGRF inoculated sheep also grew as much wool as uninoculated sheep receiving a production enhancing mineral supplement. The results from these experiments suggest that FGRF is readily transferable to sheep and improves N metabolism in these animals. Using micro-organisms from FGRF as an inoculum for sheep consuming a mulga diet has the potential to be an alternative to mineral supplements.

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25

Subramaniam, R., S. Shanthalingam, J. Bavananthasivam, A. Kugadas, B. Raghavan, S. A. Batra, C. N. Herndon, et al. "Bighorn sheep×domestic sheep hybrids survive Mannheimia haemolytica challenge in the absence of vaccination." Veterinary Microbiology 170, no. 3-4 (June 2014): 278–83. http://dx.doi.org/10.1016/j.vetmic.2014.01.032.

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26

POISSANT, J., A. B. A. SHAFER, C. S. DAVIS, J. MAINGUY, J. T. HOGG, S. D. CÔTÉ, and D. W. COLTMAN. "Genome-wide cross-amplification of domestic sheep microsatellites in bighorn sheep and mountain goats." Molecular Ecology Resources 9, no. 4 (July 2009): 1121–26. http://dx.doi.org/10.1111/j.1755-0998.2009.02575.x.

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27

Knarrum, Vebjørn, Ole J. Sørensen, Truls Eggen, Tor Kvam, Ole Opseth, Kristian Overskaug, and Arnstein Eidsmo. "Brown bear predation on domestic sheep in central Norway." Ursus 17, no. 1 (April 2006): 67–74. http://dx.doi.org/10.2192/1537-6176(2006)17[67:bbpods]2.0.co;2.

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28

Alvarado-Esquivel, C., M. A. Estrada-Malacón, S. O. Reyes-Hernández, J. A. Pérez-Ramírez, J. I. Trujillo-López, I. Villena, and J. P. Dubey. "Seroprevalence ofToxoplasma gondiiin Domestic Sheep in Oaxaca State, Mexico." Journal of Parasitology 99, no. 1 (February 2013): 151–52. http://dx.doi.org/10.1645/ge-3220.1.

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29

Campos, Edwina, Jorge Cuéllar, Omar Salvador, Erick A. García-Trejo, and Filipe Pereira. "The genetic diversity and phylogeography of Mexican domestic sheep." Small Ruminant Research 187 (June 2020): 106109. http://dx.doi.org/10.1016/j.smallrumres.2020.106109.

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30

Verhelst, D., S. De Craeye, M. Vanrobaeys, G. Czaplicki, P. Dorny, and E. Cox. "Seroprevalence of Toxoplasma gondii in domestic sheep in Belgium." Veterinary Parasitology 205, no. 1-2 (September 2014): 57–61. http://dx.doi.org/10.1016/j.vetpar.2014.07.001.

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31

Mekic, Cvijan, Milan Petrovic, Gligorije Trifunovic, Miroslav Zujovic, and Predrag Perisic. "Milk production of Svrljiska stock of domestic tuft sheep." Biotehnologija u stocarstvu 21, no. 5-6 (2005): 85–88. http://dx.doi.org/10.2298/bah0506085m.

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32

Hu, Xiao-di, and Li-zhi Gao. "The complete mitochondrial genome of domestic sheep,Ovis aries." Mitochondrial DNA 27, no. 2 (August 27, 2014): 1425–27. http://dx.doi.org/10.3109/19401736.2014.953076.

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33

Pybus, M. J., S. Groom, and W. M. Samuel. "MENINGEAL WORM IN EXPERIMENTALLY-INFECTED BIGHORN AND DOMESTIC SHEEP." Journal of Wildlife Diseases 32, no. 4 (October 1996): 614–18. http://dx.doi.org/10.7589/0090-3558-32.4.614.

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34

Meadows, Jennifer RS, Eva KF Chan, and James W. Kijas. "Linkage disequilibrium compared between five populations of domestic sheep." BMC Genetics 9, no. 1 (2008): 61. http://dx.doi.org/10.1186/1471-2156-9-61.

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35

Wang, Huihua, Li Zhang, Jiaxve Cao, Mingming Wu, Xiaomeng Ma, Zhen Liu, Ruizao Liu, Fuping Zhao, Caihong Wei, and Lixin Du. "Genome-Wide Specific Selection in Three Domestic Sheep Breeds." PLOS ONE 10, no. 6 (June 17, 2015): e0128688. http://dx.doi.org/10.1371/journal.pone.0128688.

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36

Kun, Jin, Chen Yan, Lin Haijun, Jin Xiaoming, Chen Yuping, and Zheng Yumci. "Winter foraging plants of domestic sheep in Hulunbeir grassland." Journal of Forestry Research 9, no. 1 (March 1998): 48–50. http://dx.doi.org/10.1007/bf02856455.

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37

Halstead, Paul. "Dimini and the ‘DMP’: faunal remains and animal exploitation in Late Neolithic Thessaly." Annual of the British School at Athens 87 (November 1992): 29–59. http://dx.doi.org/10.1017/s0068245400015045.

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Hourmouziadis' recent analysis of the extensive excavations at Dimini has isolated a series of residential subdivisions or ‘domestic areas’ within the Late Neolithic settlement. Faunal remains from the ‘central court’ and from five surrounding domestic areas suggest a remarkably uniform pattern of animal exploitation. Individual domestic units kept cows, goats, pigs, and especially sheep; sheep and pigs, at least, seem to have been raised principally for meat. The lack of domestic specialization in stock husbandry has implications for understanding both of the ‘neolithic mode of production’ and of the role of specialization in the emergence of the élite which occupied the central court.

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38

Rutter, S. M., P. D. Penning, A. J. Parsons, A. Harvey, and R. J. Orr. "Dietary preferences of domestic ruminants." BSAP Occasional Publication 20 (1997): 96–97. http://dx.doi.org/10.1017/s0263967x00043482.

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To develop sustainable grazing systems, an understanding of the complex interactions between competing plant species and grazing herbivores is needed. An understanding of dietary preference is a prerequisite to predicting how much and from which plant species animals select. This work initially concentrated on dietary preferences of sheep grazing perennial ryegrass and white clover swards and was then extended to other animal species to test the generality of our findings.

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Bikchurina, T. I., E. K. Tomgorova, A. A. Torgasheva, V. A. Bagirov, N. A. Volkova, and P. M. Borodin. "Chromosome synapsis, recombination and epigenetic modification in rams heterozygous for metacentric chromosome 3 of the domestic sheep Ovis aries and acrocentric homologs of the argali Ovis ammon." Vavilov Journal of Genetics and Breeding 23, no. 3 (May 14, 2019): 355–61. http://dx.doi.org/10.18699/vj19.502.

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Hybridization of domestic animal breeds with their wild relatives is a promising method for increasing the genetic diversity of farm animals. Resource populations derived from the hybridization of various breeds of domestic sheep with mouflon and argali are an important source of breeding material. The karyotypes of argali and domestic sheep differ for a Robertsonian translocation, which occurred in the common ancestor of mouflon and domestic sheep (Ovis aries) due to the centric fusion of chromosomes 5 and 11 of the argali (O. ammon) into chromosome 3 of sheep. It is known that heterozygosity for translocation can lead to synapsis, recombination and chromosome segregation abnormalities in meiosis. Meiosis in the heterozygotes for translocation that distinguishes the karyotypes of sheep and argali has not yet been studied. We examined synapsis, recombination, and epigenetic modification of chromosomes involved in this rearrangement in heterozygous rams using immunolocalization of key proteins of meiosis. In the majority of cells, we observed complete synapsis between the sheep metacentric chromosome and two argali acrocentric chromosomes with the formation of a trivalent. In a small proportion of cells at the early pachytene stage we observed delayed synapsis in pericentromeric regions of the trivalent. Unpaired sites were subjected to epigenetic modification, namely histone H2A.X phosphorylation. However, by the end of the pachytene, these abnormalities had been completely eliminated. Asynapsis was replaced by a nonhomologous synapsis between the centromeric regions of the acrocentric chromosomes. By the end of the pachytene, the γH2A.X signal had been preserved only at the XY bivalent and was absent from the trivalent. The translocation trivalent did not differ from the normal bivalents of metacentric chromosomes for the number and distribution of recombination sites as well as for the degree of centromeric and crossover interference. Thus, we found that heterozygosity for the domestic sheep chromosome 3 and argali chromosomes 5 and 11 does not cause significant alterations in key processes of prophase I meiosis and, therefore, should not lead to a decrease in fertility of the offspring from interspecific sheep hybridization.

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Miller, SM, JD Brooker, A. Phillips, and LL Blackall. "Streptococcus caprinus is ineffective as a rumen inoculum to improve digestion of mulga (Acacia aneura) by sheep." Australian Journal of Agricultural Research 47, no. 8 (1996): 1323. http://dx.doi.org/10.1071/ar9961323.

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This study examined the distribution of Streptococcus caprinus in domestic and feral ruminants, and the effect of rumen inoculation with S. caprinus on nitrogen digestion in mulga-fed sheep. S. caprinus is a tannin-resistant rumen bacterium found in feral goats and may play a role in alleviating the nutritive depressing effects of high concentrations of plant tannins in these animals. S. caprinus was present in samples of rumen fluid from feral goats and feral camels but was not detectable in rumen fluid from sheep and domestic goats that had not previously grazed forages containing condensed tannins. A proportion of sheep, domestic goats, and cattle grazing in mulga paddocks, with either feral goats or camels, had detectable populations of S. caprinus. Pure cultures of S. caprinus grown in vitro were successfully placed in the rumen of sheep; however, nitrogen digestion was unaffected by rumen inoculation. Interactions between several populations of micro-organisms may therefore be involved in achieving improvements in protein digestion.

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Harvey, S., S. K. Lam, and T. R. Hall. "Somatostatin tonically inhibits growth hormone secretion in domestic fowl." Journal of Endocrinology 111, no. 1 (October 1986): 91–97. http://dx.doi.org/10.1677/joe.0.1110091.

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ABSTRACT Passive immunization of immature chickens with sheep somatostatin (SRIF) antiserum promptly increased the basal plasma GH concentration and augmented TRH-induced GH secretion. Although exogenous SRIF had no inhibitory effect on the basal GH concentration in untreated birds or birds pretreated with non-immune sheep serum, it suppressed the stimulatory effect of SRIF immunoneutralization on GH secretion. These results suggest that SRIF is physiologically involved in the control of GH secretion in birds, in which it appears to inhibit GH release tonically. J. Endocr. (1986) 111, 91–97

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George, Janet L., Daniel J. Martin, Paul M. Lukacs, and Michael W. Miller. "EPIDEMIC PASTEURELLOSIS IN A BIGHORN SHEEP POPULATION COINCIDING WITH THE APPEARANCE OF A DOMESTIC SHEEP." Journal of Wildlife Diseases 44, no. 2 (April 2008): 388–403. http://dx.doi.org/10.7589/0090-3558-44.2.388.

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Carpenter, Tim E., Victor L. Coggins, Clinton McCarthy, Chans S. O’Brien, Joshua M. O’Brien, and Timothy J. Schommer. "A spatial risk assessment of bighorn sheep extirpation by grazing domestic sheep on public lands." Preventive Veterinary Medicine 114, no. 1 (April 2014): 3–10. http://dx.doi.org/10.1016/j.prevetmed.2014.01.008.

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Foreyt, William J., Kurt P. Snipes, and Rick W. Kasten. "FATAL PNEUMONIA FOLLOWING INOCULATION OF HEALTHY BIGHORN SHEEP WITH PASTEURELLA HAEMOLYTICA FROM HEALTHY DOMESTIC SHEEP." Journal of Wildlife Diseases 30, no. 2 (April 1994): 137–45. http://dx.doi.org/10.7589/0090-3558-30.2.137.

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Silflow, Ronald M., and William J. Foreyt. "SUSCEPTIBILITY OF PHAGOCYTES FROM ELK, DEER, BIGHORN SHEEP, AND DOMESTIC SHEEP TO PASTEURELLA HAEMOLYTICA CYTOTOXINS." Journal of Wildlife Diseases 30, no. 4 (October 1994): 529–35. http://dx.doi.org/10.7589/0090-3558-30.4.529.

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Walker, A. R., and E. B. M. Koney. "Distribution of ticks (Acari: Ixodida) infesting domestic ruminants in Ghana." Bulletin of Entomological Research 89, no. 5 (May 1999): 473–79. http://dx.doi.org/10.1017/s0007485399000619.

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AbstractNineteen sites throughout Ghana were selected as representative of the three major zones of natural vegetation. At these sites, samples of ticks were collected from groups of approximately five each of cattle, sheep and goats. Ticks were identified by light microscopy. In order of abundance, tick species found on livestock were: Amblyomma variegatum (Fabricius), Boophilus decoloratus (Koch), Rhipicephalus senegalensis Koch, Boophilus annulatus (Say), Hyalomma marginatum rufipesKoch, a Rhipicephalus species in the sanguineus group of uncertain identity close to both R. turanicus Pomerantsev and R. sulcatus Neumann, Boophilus geigyi Aeschlimann & Morel, Hyalomma truncatum Koch, Rhipicephalus evertsi evertsi Neumann and Rhipicephalus lunulatus Neumann. Amblyomma variegatum was found on every sample of the sheep, goats and cattle examined and was equally abundant in all vegetation zones. Boophilus species were found mainly on cattle, with some on sheep and were widely distributed by vegetation zone. Hyalomma species were found predominantly on cattle and widely distributed by vegetation zone. Rhipicephalus e. evertsi and R. senegalensis were found on sheep and cattle in all vegetation zones. The tick fauna of Ghana is similar to those of other West African countries and this shows that control strategies developed in neighbouring countries can be applied to Ghana. The significance of this tick fauna is discussed in relation to potential for pathogen transmission.

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Somenzi, Elisa, Paolo Ajmone-Marsan, and Mario Barbato. "Identification of Ancestry Informative Marker (AIM) Panels to Assess Hybridisation between Feral and Domestic Sheep." Animals 10, no. 4 (March 30, 2020): 582. http://dx.doi.org/10.3390/ani10040582.

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Hybridisation of wild populations with their domestic counterparts can lead to the loss of wildtype genetic integrity, outbreeding depression, and loss of adaptive features. The Mediterranean island of Sardinia hosts one of the last extant autochthonous European mouflon (Ovis aries musimon) populations. Although conservation policies, including reintroduction plans, have been enforced to preserve Sardinian mouflon, crossbreeding with domestic sheep has been documented. We identified panels of single nucleotide polymorphisms (SNPs) that could act as ancestry informative markers able to assess admixture in feral x domestic sheep hybrids. The medium-density SNP array genotyping data of Sardinian mouflon and domestic sheep (O. aries aries) showing pure ancestry were used as references. We applied a two-step selection algorithm to this data consisting of preselection via Principal Component Analysis followed by a supervised machine learning classification method based on random forest to develop SNP panels of various sizes. We generated ancestry informative marker (AIM) panels and tested their ability to assess admixture in mouflon x domestic sheep hybrids both in simulated and real populations of known ancestry proportions. All the AIM panels recorded high correlations with the ancestry proportion computed using the full medium-density SNP array. The AIM panels proposed here may be used by conservation practitioners as diagnostic tools to exclude hybrids from reintroduction plans and improve conservation strategies for mouflon populations.

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Lindsay, DR. "Reproductive Behaviour in Survival: A Comparison between Wild and Domestic Sheep." Australian Journal of Biological Sciences 41, no. 1 (1988): 97. http://dx.doi.org/10.1071/bi9880097.

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The recorded behaviour of wild species of Ovis at the beginning of the breeding season supports the proposal that mating is synchronized by the 'ram effect', a phenomenon already described in domestic sheep. Animals separate into exclusive male flocks, and flocks of females and young animals for most of the year. They reunite just before the rutting season. At lambing there appear to be behavioural mechanisms that ensure that ewes lamb in close proximity to one another. It is hypothesized that these behavioural characteristics of wild sheep help protect the newborn and that much of the reproductive and maternal behaviour of domestic sheep may be traced to comparable behaviour in wild species.

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Phillips, Ida L., Cristina W. Cunha, Dustin Galbraith, Margaret A. Highland, Robert J. Bildfell, and Hong Li. "High copy number of ovine gammaherpesvirus 2 DNA associated with malignant catarrhal fever–like syndrome in a lamb." Journal of Veterinary Diagnostic Investigation 30, no. 4 (April 6, 2018): 623–27. http://dx.doi.org/10.1177/1040638718766976.

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Domestic and wild sheep are the natural reservoirs for ovine gammaherpesvirus 2 (OvHV-2), the causative agent of sheep-associated malignant catarrhal fever (SA-MCF). Virtually all adult sheep are infected with OvHV-2 under natural flock conditions, and infection is normally subclinical. MCF-like clinical signs and typical histologic lesions in sheep have been linked during case investigations at veterinary diagnostic laboratories; however, the confirmation of naturally occurring MCF in sheep is problematic. To date, the assays for detection of OvHV-2–specific antibodies or DNA are usually positive in sheep, regardless of health status, so mere detection of antibodies or the agent is of minimal diagnostic significance in this species. We document herein a naturally occurring MCF case in a 4-mo-old domestic lamb and demonstrate that the affected animal had 100–1,000 times more OvHV-2 copy numbers in tissues than in healthy adult and age-matched sheep. These results indicate that high copy numbers of viral DNA in tissues associated with characteristic lesions can be used to confirm the diagnosis of MCF in sheep.

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Rahman, Md Arifur, Md Mahbub Alam, Md Aminul Islam, A. K. Fazlul Haque Bhuiyan, and A. K. M. Anisur Rahman. "Serological and Molecular Evidence of Q Fever in Domestic Ruminants in Bangladesh." Veterinary Medicine International 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/9098416.

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The objective of this study was to know the herd and animal level prevalence of Q fever in domestic ruminants in some selected districts in Bangladesh. Randomly collected 111 bulk milk and 94 sera samples of cattle, sheep, and goats were tested by indirect ELISA (iELISA). DNA extracted from 23 aborted fetal membranes was analyzed by real time (rt) PCR. The positive cut-off value of iELISA in bulk milk and individual animal sera was ≥30% and ≥40%, respectively. The overall herd level prevalence of Q fever in dairy cattle was 15.6%. The prevalence of Q fever in dairy cattle was significantly higher in Sirajganj in comparison to Satkhira District (P<0.01). The overall seroprevalence of Q fever in domestic ruminants was 5.06%. Although statistically insignificant, the seroprevalence of Q fever was relatively higher in sheep (9.52%) in comparison to goats (3.33%) and cattle (3.57%). Out of 23 aborted fetal membranes, only one sheep placenta was positive in rt PCR. Q fever is present in all of the three important species of domestic ruminants in Bangladesh. It may have some role in sheep abortion as the seroprevalence is relatively higher and also one sheep placenta is rt PCR positive.

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