Publications

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an accidental laboratory infection with trypanosomes of a defined stock. ii. studies on the serological response of the patient and the identity of the infecting organism. 19807185920
an outbreak of diarrhoea associated with cryptosporidiosis in naturally reared lambs. 19827186701
transfer of radiocesium from different environmental sources to ewes and suckling lambs.indoor experiments are described that compare the transfer of radiocesium to ewe and lamb tissues from different sources. lactating ewes were fed either perennial ryegrass contaminated by chernobyl fallout, or saltmarsh vegetation contaminated by marine discharges from the sellafield reprocessing plant. the transfer to ewe tissues and milk was greater from the chernobyl contaminated herbage than from saltmarsh vegetation. lambs receiving a mixture of vegetation and milk were given radiocesium fr ...19892793473
causes of death in the native sheep of north ronaldsay, orkney. ii. lambs.investigation showed that the common causes of death in north ronaldsay lambs were trauma due to behavioural patterns and starvation/hypothermia due in part to poor condition of the ewes.19902331591
causes of death and illness in the native sheep of north ronaldsay, orkney. i. adult sheep.post-mortem examinations on 71 native sheep found dead on the island of north ronaldsay, orkney in four visits between april 1983 and july 1985 were carried out. the sheep in this almost feral flock have access to a small area of unmanaged moorland pasture but are otherwise restricted to the foreshore where they subsist largely on laminaria spp. and other seaweeds. young adult animals died largely of heavy parasite burdens combined with inadequate nutrition, while the older sheep often starved b ...19902331590
[decontamination of soil after bacterial warfare experiments on gruinard island].bombs containing b. anthracis spores were detonated on gruinard island in 1942 and 1943 as a part of a british research programme set up in response to fears that the germans were developing biological weapons. in 1986 island was decontaminated by spraying with 5% formaldehyde. as a demonstration of confidence in the success of the decontamination operation a flock of 40 sheep was allowed to graze for several months with no ill effects.19911819816
molecular genetic variation and individual survival during population crashes of an unmanaged ungulate population.theoretical models of the effect of population bottlenecks on genetic variation assume that individuals are removed at random from the population. we investigated this assumption in a naturally regulated, unstable population of soay sheep (ovis aries). during rapid population declines or 'crashes', individuals were not removed at random with respect to genotype: we found associations between individual survival and certain genotypes at five polymorphic protein or microsatellite dna loci (ada, go ...19957777592
the association of a codon 136 prp gene variant with the occurrence of natural scrapie.incidence of both experimental and natural scrapie in sheep has been associated with polymorphisms of the prp gene. in case/control studies the prp allele which encodes valine at codon 136 (val136) is found in 96-100% of naturally infected scrapie sheep of shetland, scottish halfbred and blue du maine breeds. in contrast, in healthy animals from the same flocks, the most frequent allele encodes ala136 (91-100% of sheep). however val136 does not correlate with incidence of scrapie in two other fl ...19947979991
an outbreak of pregnancy toxaemia in a flock of scottish blackface sheep. 19938116171
identification of bloodmeals of the scottish biting midge, culicoides impunctatus, by indirect enzyme-linked immunosorbent assay (elisa).an indirect enzyme-linked immunosorbent assay (elisa) has been developed to identify the bloodmeal sources of culicoides impunctatus goetghebuer. nightly light trapping in scotland, between april and september 1992, caught a total of 344 blood-engorged female c. impunctatus, all in may, june and july. the insects were stored in 70% ethanol and tested 5-7 months later. bloodmeal sources were positively identified for 246 (71.5%). bovine hosts were most common (38.4%), followed by deer (23.0%) and ...19948161839
lyme disease in scotland: results of a serological study in sheep. 19938212486
william ford robertson (1867-1923): his study of neuroglia. 19751102820
brucella abortus infection in sheep. i. field case. 1976816418
apparent resistance of p ovis to flumethrin. 19958525587
differentiation between human and ovine isolates of bordetella parapertussis using pulsed-field gel electrophoresis.the genetic relatedness of 18 human and 29 ovine isolates of bordetella parapertussis was examined by macrorestriction digestion of dna with the rarely cutting enzyme xbai and resolution by pulsed-field gel electrophoresis. there was clear separation of human and ovine isolates and variation within host types. the human isolates were separated into three types as were the 24 scottish ovine isolates. species-specific bands were observed with the human isolates at 114, 134, 166, 213, 346 and 372 k ...19968598269
host-pathogen interactions in scrapie.there are many strains of the agent which causes scrapie and these can be used singly or given as mixed infections to investigate the ways in which agent and host control mechanisms interact during the pathogenesis of the disease. two genes in mice are described; one only affects the kinetics of the disease when extraneural injections are used, the other acts irrespective of the route of injection and it is suggested that it determines the structure of a multimeric agent-replication site, the nu ...1975807505
a study of the effects of copper deficiency in scottish blackface lambs on improved hill pasture.one member of each pair of twin lambs from 37 five-and six-year-old scottish blackface ewes, grazing reseeded pasture suspected of causing a molybdenum-sulphur induced copper deficiency in sheep, was given an injection of 12.5 mg copper calcium edetate at about eight weeks of age. plasma copper concentrations of these lambs were maintained in the normal range by further injections of copper as required (treatment group). the remaining member of each twin pair received no copper therapy (control ...1979573017
antibodies to ovine adenoviruses in sheep in scotland. 1977415407
lyme disease in scotland. 19948778964
studies on the epidemiology of dictyocaulus filaria infection in blackface sheep on a low-ground scottish farm.the excretion of dictyocaulus filaria larvae in the faeces of blackface sheep on a heavily stocked lowland farm in south east scotland, showed considerable individual, week to week and year to year variation. patent infections were first observed in lambs in may or june but the heaviest and most prevalent infections occurred in the autumn. infection levels were generally low but infections tended to be prolonged and reinfection occurred following anthelmintic treatment until the late autumn or w ...1977146903
ovine psoroptic otoacariasis: an abattoir survey. 19968883348
acute fascioliasis in sheep. 19968890467
resistance of the sheep scab mite psoroptes ovis to propetamphos. 19968931304
intestinal torsion and red gut in sheep. 19968931306
the incidence and level of listeria monocytogenes contamination of food sources at primary production and initial processing.listeria monocytogenes was isolated in low numbers from a variety of environmental samples associated with the primary production of food, including vegetation, faeces and meat. the organism was rarely detected on growing grass and vegetables prior to processing. the excretion of l. monocytogenes by farm animals was linked to their diet, with animals fed entirely on hay or manufactured diets not excreting detectable levels of listeria (i.e. absence in 25 g). however, animals fed on silage, which ...19968972091
association between natural scrapie and prp genotype in a flock of suffolk sheep in scotland.the incidence of natural scrapie in sheep is associated with polymorphisms of the prp gene, particularly those at codons 136, 154 and 171. in many breeds, the prp allele encoding valine at codon 136 confers an extremely high risk of scrapie, but in suffolk sheep this allele is vanishingly rare. in this study of a single closed flock of suffolk sheep in scotland, scrapie occurred primarily in animals which were homozygous for glutamine at codon 171, a genotype which was significantly less frequen ...19979023905
cloning technique 'reveals legal loophole'. 19979039895
human cloning requires a moratorium, not a ban. 19979052767
scientists flock to hear cloner wilmut at the nih. 19979087453
clone sheds light on research, ethical questions. 19979140547
e coli o157: lessons of the scottish outbreak. 19979141219
roslin patents come under the spotlight. 19979153376
streamwater nitrate concentrations in six agricultural catchments in scotland.the concentrations of nitrate-n (no3-n) in catchment inputs and outputs have been compared and contrasted between 6 farm catchments in scotland, 3 in the west and 3 in the north-east. forms of intensive animal farming ranging between beef and dairy cattle, sheep and poultry give different sources for potential no3-n leakage from the systems. while stream reaches bordered by intensive cereal production give rise to the largest inputs to surface waters, climatic influences result in the more-effic ...19979232025
a new adenovirus from sheep. 19744138913
cesium-137, 134cs and 110mag in lambs grazing pasture in ne scotland contaminated by chernobyl fallout.the decline in cs radioisotope levels has been studied in tissues from lambs grazing lowland pasture. the lambs were slaughtered 18 and 115 d after contamination with chernobyl fallout. during this time the cs activity decreased to 13% of the initial amount in animals that had continued to graze contaminated pasture and to 3.5% in animals consuming uncontaminated feed. the 137cs concentration in grass from the field grazed by the lambs decreased with a half-time of 22 d over the period 11-100 d ...19892925385
evidence of multiple anthelmintic resistance in a strain of teladorsagia circumcincta (ostertagia circumcincta) isolated from goats in scotland.the efficacy of ivermectin, fenbendazole and levamisole was determined in lambs individually infected with 5000 third stage larvae of teladorsagia (ostertagia) species isolated from a herd of goats with a history of benzimidazole resistance and where the efficacy of ivermectin had also suffered an apparent decline. efficacies, calculated using geometric means, for groups where treatments were directed against adult worms were 90.3 per cent (ivermectin), 43.4 per cent (fenbendazole) and 100 per c ...19921465512
liver fluke in great britain: a survey of affected livers.over a period of 15 months data were collected from abattoirs in great britain on 213,082 cattle and 362,838 sheep livers to determine the distribution and prevalence of damage by fasciola hepatica. the stock came from 8239 farms, and from livestock markets in 81 counties. 53 per cent of the farms had sent affected stock, with significant percentages in eastern as well as the western counties of england and scotland. 21 per cent of all cattle and 7 per cent of all sheep livers examined were affe ...19751202744
dolly researcher plans further experiments after challenges. 19989495322
little lamb, who made thee? a letter from edinburgh. 19989532398
tracing the origins of louping ill virus by molecular phylogenetic analysis.the nucleotide and deduced amino acid sequences of louping ill (li) virus isolates, collected from representative regions of the british isles and norway, were determined for either the entire envelope gene (20 isolates) or for a portion of the envelope gene that spans a hypervariable region and includes an li virus specific marker sequence (53 isolates). phylogenetic analysis reveals the presence of three major geographical populations of li virus in the british isles, viz. irish, welsh and bri ...19989603312
molecular variation, evolution and geographical distribution of louping ill virus.following the demonstration that the tick-borne encephalitis (tbe) subgroup viruses are distributed as a cline across the northern hemisphere (zanotto et al., 1995), we have analyzed the dispersal pattern of louping ill (li) virus, the most westerly located member in the cline. a total number of 21 li or li-related virus e gene sequences have been used for a detailed molecular analysis of the evolution, phylogeny and geographical distribution of li virus in the british isles and ireland. the res ...19979607079
patent clash looming over cloning techniques? 19989697758
india's short cow drags roslin institute into controversy. 19989732859
an investigation into dystocia in a south country cheviot flock.an abnormally high incidence of dystocia was encountered in the south country cheviot flock at the hill farming research organisation's research station at sourhope, yetholm, roxburghshire over the past four years, 1970 to 1973. lambing records were only available for 1972 and 1973 for sourhope ewes and gimmers of all breeds and showed the following: (see article) this meant that in terms of attention and vigilance, a high shepherding input was necessary with the south country cheviot flock. int ...19751202743
human but not ovine isolates of bordetella parapertussis are highly clonal as determined by pcr-based rapd fingerprinting.the dna fingerprints of 170 human isolates and ten ovine isolates of bordetella parapertussis were examined by arbitrarily-primed pcr/rapd with 29 primers. based on this technique, all the human isolates appear highly genetically homogeneous. the ovine isolates could be distinguished from human isolates and they showed diversity among themselves. therefore, human isolates of b. parapertussis are a highly clonal group adapted to infect humans and they are distinct from polymorphic ovine isolates.19989795782
the epidemiology of louping-ill, a tick borne infection of red grouse (lagopus lagopus scoticus).the epidemiology of louping-ill in red grouse was studied in northern britain concentrating on the possible role of other species and mechanisms of disease persistence. this tick borne viral disease caused heavy mortality in red grouse, particularly chicks. louping-ill induced mortality reduced the strength of the density dependence that generates the tendency of grouse populations to cycle and in some populations may cause population sinks. four routes of transmission were examined and non-vira ...19979802086
cysts of sarcocystis tenella in north ronaldsay sheep. 19836419441
the role of lambs in louping-ill virus amplification.in some areas of scotland, the prevalence of louping-ill virus has not decreased despite the vaccination of replacement ewes for over 30 years. the role of unvaccinated lambs in viral persistence was examined through a combination of an empirical study of infection rates of lambs and mathematical modelling. serological sampling revealed that most lambs were protected by colostral immunity at turnout in may/june but were fully susceptible by the end of september. between 8 and 83% of lambs were i ...200010726271
role of small mammals in the persistence of louping-ill virus: field survey and tick co-feeding studies.louping-ill (li) is a tick-borne viral disease of red grouse, lagopus lagopus scoticus lath. (tetraonidae: galliformes), and sheep, ovis aries l. (bovidae: artiodactyla), that causes economic loss to upland farms and sporting estates. unvaccinated sheep, grouse and mountain hares, lepus timidus l. (leporidae: lagomorpha), are known to transmit li virus, whereas red deer, cenrus elaphus l. (cervidae: artiodactyla), and rabbits, oryctolagus cuniculus l. (leporidae: lagomorpha), do not. however, th ...200011016435
prevalence of vacuolar lesions consistent with scrapie in the brains of healthy cull sheep of the shetland islands.to determine the levels of background scrapie-like pathology in the brains of clinically normal adult sheep, the brains of 1106 sheep from 28 known scrapie-infected flocks and nine apparently uninfected flocks were examined during 1998 and 1999. one per cent of the brains had vacuolar pathology and disease-specific accumulations of prion protein consistent with a diagnosis of scrapie. all the positive animals had at least one allele of the prion protein gene encoding valine at codon 136, and ori ...200011079439
role of enzootic abortion and toxoplasmosis in an outbreak of abortion in a scottish sheep flock.during 1978-79 there was an outbreak of abortion in a large sheep flock during which approximately 10 per cent of the breeding ewes aborted. both toxoplasma gondii and chlamydia ovis (the agent of enzootic abortion of ewes) were considered to be involved. in the year following this outbreak (1979-80), 156 ewes (11.4 per cent) aborted and the majority of cases were diagnosed as enzootic abortion: only one case showed gross pathology typical of toxoplasmosis. serology carried out on sera collected ...19836649377
an outbreak of e. coli o157 infection with evidence of spread from animals to man through contamination of a private water supply.an outbreak of e. coli o157 infection occurred in the highland region of scotland in the summer of 1999. the source of the outbreak was traced to an untreated private water supply. all six cases identified arose in visitors to the area, and most had very limited exposure to the contaminated water. permanent residents on the same supply were unaffected. the e. coli o157 isolates from the water, sheep faeces collected from around the source and the human stool samples were indistinguishable using ...200111293673
a survey of the prevalence of escherichia coli o157 in raw meats, raw cow's milk and raw-milk cheeses in south-east scotland.2429 samples of foodstuffs were examined for the presence of verocytotoxigenic escherichia coli o157 (vtec o157) by means of immunomagnetic separation (ims) over a 2-year period commencing april 1997. specimens comprised 1190 raw meats, 500 raw milks and 739 raw-milk cheeses. the meat and cheese samples were purchased from retail premises in south-east scotland; raw milk samples were obtained directly from farms. in addition, total e. coli counts were performed on milk and cheese samples, and th ...200111407549
investigations on a babesia isolated from scottish sheep.the pathognomic, serologic and morphometric identity of a babesia sp. recently isolated from sheep in argyllshire was studied. initially, problems were encountered due to the occurrence of eperythrozoon ovis as a contaminant of the isolate and treatment with neoarsphenamine failed to remove it. finally, a combination of oxytetracycline therapy and rapid passage allowed isolation of the babesia sp. and its preservation in the form of a glycerolized, infected blood stabilate. inoculation of the st ...19817329723
a survey of sheep losses and their causes on commercial farms in the north of scotland.a three year survey on sheep deaths and their causes was conducted on 10 commercial farms in the north of scotland. diseases and other trauma associated with the perinatal period accounted for 56.81% of all ewe deaths, while pneumonia, parasitic gastroenteritis, torsion of the bowel and haemorrhagic enteritis (redgut) accounted for a further 21.7%. no one disease condition predominated in the rams and hoggs. in lambs, most deaths occurred between birth and four days old (77.86%). causes came in ...19807361390
an epidemiological study of the relations between exposure to organophosphate pesticides and indices of chronic peripheral neuropathy and neuropsychological abnormalities in sheep farmers and dippers.to investigate the hypothesis that chronic low level exposure to organophosphates (ops) in sheep dips is related to clinically detectable measures of polyneuropathy.200111600725
the size and weight of cattle and sheep in early modern scotland. 198811616468
scottish scientists clone adult sheep: technique's use with humans is feared. 199711647144
with cloning of a sheep, the ethical ground shifts. 199711647276
one small step for a sheep. 199711656628
suffering of the lambs. 199711656635
positive genetic correlation between parasite resistance and body size in a free-living ungulate population.parasite resistance and body size are subject to directional natural selection in a population of feral soay sheep (ovis aries) on the island of st. kilda, scotland. classical evolutionary theory predicts that directional selection should erode additive genetic variation and favor the maintenance of alleles that have negative pleiotropic effects on other traits associated with fitness. contrary to these predictions, in this study we show that there is considerable additive genetic variation for ...200111761070
hepatic encephalopathy associated with cobalt deficiency and white liver disease in lambs. 200111808665
bse in sheep? humiliated lab fights to save face. 200211823623
the distribution of faecal nematode egg counts in scottish blackface lambs following natural, predominantly ostertagia circumcincta infection.faecal samples were taken in 2 consecutive years from scottish blackface lambs on a commercial farm in central scotland to examine variation among lambs in the number of nematode eggs in their faeces. samples were taken at intervals of 4 weeks from 1 to 5 months of age. lambs were treated with a broad-spectrum anthelmintic at each sample date. ewes and lambs were naturally infected by grazing pasture contaminated with mixed, predominantly ostertagia circumcincta, nematode species. the ewes were ...19957596641
microbiological research at the centre for tropical veterinary medicine (ctvm).the nature of the research carried out by the staff of the microbiology section of the centre for tropical veterinary medicine (ctvm) at home and abroad is illustrated by precis of projects on rinderpest, orf in goats and sheep, bovine dermatophilosis, contagious caprine pleuropneumonia, tick-borne fever in goats and sheep, bovine petechial fever, and caprine cowdriosis.19968815612
ringworm caused by trichophyton verrucosum--an emerging problem in sheep flocks. 200212092624
reporting of sheep lameness conditions to veterinarians in the scottish borders. 200212120925
survey of sheep nematode parasite control methods in south-east scotland. 200312553582
epidemiology of nematodirus battus infection in eastern scotland.a field investigation was carried out from 1981 to 1983 on the prevalence of nematodirus battus under different systems of lowland sheep management. pasture larval counts, ewe and lamb worm egg counts, and tracer lamb worm counts were carried out. as expected, contamination was generally greater on permanent pasture than on new leys as measured by pasture larval counts and lamb worm egg counts. however significant contamination was also recorded on young grass fields for which alternate grazing ...19854001558
the potential role of wild rabbits oryctolagus cuniculus in the epidemiology of paratuberculosis in domestic ruminants.mycobacterium avium subspecies paratuberculosis, the organism responsible for paratuberculosis in cattle and sheep has been found in wild rabbits (oryctolagus cuniculus) in the east of scotland. few studies have investigated either the level of faecal contamination by rabbits on farms, or the potential infectivity of rabbit excreta. the rate of rabbit faecal contamination deposited and the numbers encountered were estimated for 21 fields on 4 farms with a paratuberculosis problem. 7357 +/- 2571 ...200312825741
the risk of disease transmission to livestock posed by contamination of farm stored feed by wildlife excreta.livestock feed is susceptible to contamination from wildlife excreta during on farm storage. pathogens associated with diseases such as paratuberculosis, salmonella and cryptosporidiosis are present in wild rodent and bird excreta. feed stores on four farms in the east of scotland were monitored monthly over the winter of 1998/9 to quantify the levels of wildlife faecal contamination. a mean of 79.9 rodent (95% confidence interval: 37.5-165.9) and 24.9 (14.3-41.7) bird faeces were deposited per ...200312825742
biotechnology. sheep fail to produce golden fleece. 200312829753
sheep histocompatibility antigens: a population level comparison between lymphocyte antigens previously defined in france, england and scotland, and sheep red cell groups.a comparison test was performed to look for correlations between the three nomenclature systems for sheep histocompatibility antigens which have been previously described in france, england and scotland. 187 french sheep from a wide variety of breeds were typed for lymphocyte antigens with antisera which detect the ola, p and ed series of antigens; they were also tested against 387 uncharacterized french antisera. six clusters of sera were found which showed correspondence between antigens of at ...19854003855
foot and mouth epidemic reduces cases of human cryptosporidiosis in scotland.in scotland, rates of cryptosporidiosis infection in humans peak during the spring, a peak that is coincident with the peak in rates of infection in farm animals (during lambing and calving time). here we show that, during the outbreak of foot and mouth disease (fmd) in 2001, there was a significant reduction in human cases of cryptosporidiosis infection in southern scotland, where fmd was present, whereas, in the rest of scotland, there was a reduction in cases that was not significant. we asso ...200312934196
a preliminary investigation of photosensitization in scottish sheep. 196414105239
the epidemiology of louping ill in ayrshire: the first year of studies in sheep. 196414128320
caseous lymphadenitis in a commercial ram stud in scotland. 19979413123
a descriptive study of 'kangaroo gait' in sheep in northern britain.two questionnaires were undertaken to obtain improved knowledge of the signalment, incidence and risk factors of the condition termed 'kangaroo gait' (kg; a forelimb locomotor disorder of adult female sheep). the first survey was mailed to 221 veterinary surgeons in practices in northern britain which provided veterinary care for sheep, and the second was mailed to 438 sheep-flock owners and managers located in the scottish borders, who were recruited via their veterinary surgeons. responses of ...200314519343
soay rams target reproductive activity towards promiscuous females' optimal insemination period.female promiscuity is thought to have resulted in the evolution of male behaviours that confer advantages in the sperm competition that ensues. in mammalian species, males can gain a post-copulatory advantage in this sperm 'raffle' by inseminating females at the optimal time relative to ovulation, leading to the prediction that males should preferentially associate and copulate with females at these times. to the best of our knowledge, we provide the first high-resolution test of this prediction ...200314561297
scottish sheep scab initiative. 200314582736
a further study of the epidemiology of ovine fascioliasis in scotland and its control using molluscicide. 19734721938
epidemiology of salmonella enterica serovars enteritidis and typhimurium in animals and people in scotland between 1990 and 2001.two serovars of salmonella which are currently of particular importance in both human and animal infections are salmonella enterica serovars enteritidis phage type 4 (pt4) and typhimurium definitive type 104 (dt104). this paper describes the trends in the relationships between the levels of infection of people and a range of farm animal species with these two serovars and explores some of the reasons behind them. in 1996, there was a peak of 520 reports of s typhimurium dt104 infection in people ...200314620550
factors involved in middle ear infection (otitis media) in lambs. 19725079245
the role of non-viraemic transmission on the persistence and dynamics of a tick borne virus--louping ill in red grouse ( lagopus lagopus scoticus) and mountain hares ( lepus timidus).there exist many tick borne infections that are of either economic or public health interest. mathematical models have previously been used to describe the dynamics of these infections. however it has recently come to light that there is an alternative mechanism for the transmission of these diseases that has not been considered in a modelling framework. this is transmission through ticks co-feeding on non-viraemic hosts. this paper extends a simple mathematical model to include this alternative ...200414745507
testing for maedi-visna. 200414994867
rising burden of immature sheep ticks (ixodes ricinus) on red grouse (lagopus lagopus scoticus) chicks in the scottish uplands.the sheep tick ixodes ricinus (l.) (acari: ixodidae) is an ectoparasite of major economic and pathogenic importance in scotland. its distribution in the scottish uplands is assumed to be governed by the abundance and distribution of its definitive hosts (deer and sheep) and climatic variables such as temperature and rainfall. as the numbers of its major host in scotland, red deer, have increased dramatically and climatic conditions have become more favourable, the level of parasitism could have ...200415009449
national survey for salmonella in pigs, cattle and sheep at slaughter in great britain (1999-2000).the objective of these surveys was to estimate the prevalence of faecal carriage of salmonella in healthy pigs, cattle and sheep at slaughter, and of pig carcase contamination with salmonella. these data can be used as a baseline against which future change in salmonella prevalence in these species at slaughter can be monitored.200415012813
red deer stocks in the highlands of scotland.grazing by hill sheep and red deer prevents the regeneration of woodland in many parts of the scottish highlands and has also led to extensive loss of heather cover. conservation bodies claim that there has been a rapid rise in highland deer numbers caused by inadequate management and that these need to be drastically reduced. here we show that the recent increase in red deer stocks has probably been overestimated and suggest that the gradual rise in numbers since 1970 may be a consequence of a ...200415152241
brucellosis in sheep. 19695812825
autumn nematodiriasis. 19846516192
bacteriology and somatic cell counts in milk samples from ewes on a scottish farm.milk samples from 50 sheep on a single scottish research farm were collected weekly for 10 wk postpartum. samples were analyzed for somatic cell counts (scc) each week and bacteriologic culture was done for 7 of the 10 wk. a total of 492 udder half samples were cultured, of which 467 had corresponding cell count data. statistical analysis on complete scc and culture data showed no association between scc and bacterial isolation, even when more than 10 colonies of a single bacterial species were ...200415352543
modelling non-additive and nonlinear signals from climatic noise in ecological time series: soay sheep as an example.understanding how climate can interact with other factors in determining patterns of species abundance is a persistent challenge in ecology. recent research has suggested that the dynamics exhibited by some populations may be a non-additive function of climate, with climate affecting population growth more strongly at high density than at low density. however, we lack methodologies to adequately explain patterns in population growth generated as a result of interactions between intrinsic factors ...200415451687
anthelmintic-resistant nematodes in sheep in scotland. 200111497405
flies associated with cattle in south west scotland during the summer months.the sheep headfly, hydrotaea irritans, and morellia simplex were the species most frequently associated with cattle at pasture and comprised 69.01 per cent and 13.93 per cent, respectively, of the total fly collection made from grazing cattle. the most prevalent biting fly was haematobosca stimulans which comprised 4.46 per cent of the total catch. a few clegs, haematopota pluvialis, and horse flies, hybomitra distinguenda, were also recorded. a few of the headflies swarming around cattle entere ...19817244374
population dynamics of a scrapie outbreak.a detailed analysis of a scrapie outbreak in a flock of cheviot sheep is described. a total of 33 cases of 1473 sheep born to the flock were reported between 1985 and 1994. the epidemiology of scrapie can only be understood with reference to sheep demography, the population genetics of susceptibility to scrapie, pathogenesis during a long incubation period, and the rate of transmission (by both horizontal and vertical routes), all of which interact in complex ways. in recent work a mathematical ...200111504423
maternal genetic effects set the potential for evolution in a free-living vertebrate population.heritable maternal effects have important consequences for the evolutionary dynamics of phenotypic traits under selection, but have only rarely been tested for or quantified in evolutionary studies. here we estimate maternal effects on early-life traits in a feral population of soay sheep (ovis aries) from st kilda, scotland. we then partition the maternal effects into genetic and environmental components to obtain the first direct estimates of maternal genetic effects in a free-living populatio ...200515715846
concentration and prevalence of escherichia coli o157 in sheep faeces at pasture in scotland.to study the presence, numbers and virulence profiles of escherichia coli o157 in sheep faeces and validate the microbiological methods used to attain these data.200515715867
male mate choice influences female promiscuity in soay sheep.in most animal species, males are predicted to compete for reproductive opportunities, while females are expected to choose between potential mates. however, when males' rate of reproduction is constrained, or females vary widely in 'quality', male mate choice is also predicted to occur. such conditions exist in the promiscuous mating system of feral soay sheep on st kilda, scotland, where a highly synchronized mating season, intense sperm competition and limitations on sperm production constrai ...200515734690
the foot-and-mouth disease epidemic in dumfries and galloway, 2001. 1: characteristics and control.the foot-and-mouth disease epidemic in dumfries and galloway in south-west scotland comprised 177 infected premises (ips) in 24 geographical clusters, and ran from march 1 until may 23, 2001. initial seeding of infection was by livestock (predominantly sheep) that had passed through longtown market in adjacent cumbria. thereafter, spread within existing, and to new, clusters was associated with the movement of personnel and vehicles, with further transmission by longtown market contacts and acro ...200515751571
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