The usefulness of short‐course prednisolone during the initial phase of an elimination diet trial in dogs with food‐induced atopic dermatitis     

Claude Favrot  Petra Bizikova  Nina Fischer  Ana Rostaher  Thierry Olivry 《Veterinary dermatology》2019,30(6):498-e149

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Chronological clinical and pathological documentation of porcine ulcerative dermatitis          下载免费PDF全文

Eliane Mueller  Natalia Brünisholz  Werner Zimmerman  Meret Ricklin  Silvia Rüfenacht  Thierry Olivry  Petra J. Roosje 《Veterinary dermatology》2016,27(4):315-e78

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Protozoal nodular dermatitis and panniculitis in a Rottweiler puppy caused by Caryospora bigenetica          下载免费PDF全文

Heng L. Tham  Keith E. Linder  Alison Tucker  Ricardo Maggi  Petra Bizikova 《Veterinary dermatology》2016,27(1):44-e12

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Territorial and agonistic interactions between farmed and wild cod (Gadus morhua)     

Gisle K Sverdrup  Justin J Meager  Anders Fern  Jon E Skjraasen  Petra Rodewald  Anne G V Salvanes  Torbjrn Jrvi 《Aquaculture Research》2011,42(10):1539-1548

Studies of contest competition between wild and farmed fish have mostly focused on fish with strongly territorial behaviour. Little is known about species with more plastic social behaviour, such as Atlantic cod (Gadus morhua L.), a species that can either aggressively defend territories or shoal. There is also concern that cod that escape from farms will compete with wild populations. We examined dyadic contest competition between wild and farmed juvenile cod using an intruder–resident experimental set‐up in the laboratory. No prior residency advantage was observed, but the differences between farmed and wild cod were clear. Farmed cod were more submissive than wild cod and fled earlier during contests, which suggests that wild fish often out‐compete farmed intruders. Both fish types initiated aggression earlier against fish of the same background. A multivariate analysis of 11 different behavioural traits indicated that a group of 59% of farmed fish were behaviourally very similar to the 55% most submissive wild fish. These results suggest that wild juvenile cod may be quite robust towards competition for food and shelter from juvenile farmed cod, but further research is needed to verify this pattern.  相似文献   

Determining the disaggregated economic value of irrigation water in the Musi sub-basin in India     

Petra Hellegers  Brian Davidson 《Agricultural Water Management》2010,97(6):933-234

In this paper the residual method is used to determine the disaggregated economic value of irrigation water used in agriculture across crops, zones and seasons. This method relies on the belief that the value of a good (its price by its quantity) is equal to the summation of the quantity of each input multiplied by its average value. By applying this method to the Musi sub-basin; a subdivision of the Krishna basin in India, it was found that the value of irrigation water use is not equated across the crops, zones and seasons. The reasons why there is no sinlge value of irrigation water use are suggested. As farmers do not have perfect knowledge, do not all possess the same resource base, plant different crops for a variety of reasons (some for a financial return on land instead of water and others for sustenance), possess different crop rotation practices and are possibly riks adverse, they all value water differently. However, the results need to be interpreted with care as the crop with the lowest return to water is probably not the one to be sacrificed if water is restricted, since farmers plant crops for a variety of reasons (and sometimes not for the highest return to water that they can achieve).  相似文献   

Virucidal effects of various agents—including protease—against koi herpesvirus and viral haemorrhagic septicaemia virus     

Anette Amtmann  Ibrahim Ahmed  Petra Zahner-Rimmel  Adam Mletzko  Lisa Katharina Jordan  Martin Oberle  Helmut Wedekind  Jürgen Christian  Sven Michael Bergmann  Anna Maria Becker 《Journal of fish diseases》2020,43(2):185-195

In a search for alternative, environmentally friendly and effective disinfecting agents, a commercially available protease—Neutrase^®—was tested in this work for inactivation of koi herpesvirus (KHV) and of viral haemorrhagic septicaemia virus (VHSV). For comparison, the stability of these viral pathogens in similar configurations at various pH values and concentrations of peracetic acid or quicklime, typically used for disinfection, was tested. Therefore, virus suspensions were incubated with various concentrations of different agents for 24 hr and the titre of the remaining infectious particles was determined by virus titration. Furthermore, the treatment of both viruses, with the agents at concentrations that were previously appointed as effective, was also examined in the presence of solid material (quartz sand). All procedures investigated in this study, including the protease treatment, were able to reduce the titre of KHV and VHSV below the detection limit of the titration. Although further studies are necessary, this is the first report of the application of a protease for the inactivation of the selected fish pathogens, demonstrating the great potential of the latter for disinfection.  相似文献   

The interaction between temperature and dose on the efficacy and biochemical response of Atlantic salmon to hydrogen peroxide treatment for amoebic gill disease     

James W. Wynne  Chris Stratford  Joel Slinger  Francisca Samsing  Megan Rigby  Russell McCulloch  Petra Quezada-Rodriguez  Richard S. Taylor 《Journal of fish diseases》2020,43(1):39-48

Hydrogen peroxide (H₂O₂) is a commonly used treatment for a range of parasitic diseases of marine finfish, including amoebic gill disease (AGD). While this treatment is partially effective at reducing parasite load, H₂O₂ can have detrimental effects on the host under certain conditions. Treatment temperature and dose concentration are two factors that are known to influence the toxicity of H₂O₂; however, their impact on the outcome of AGD treatment remains unclear. Here, we investigated the effects of treatment temperature (8, 12 or 16°C) and dose concentration (750, 1,000, 1,250 mg/L) on the efficacy of H₂O₂ to treat AGD. We demonstrated that a 20-min bath treatment of H₂O₂ at all doses reduced both parasite load and gross gill score significantly. Parasite load and gross gill score were lowest in the 1,000 mg/L treatment performed at 12°C. At the high dose and temperature combinations, H₂O₂ caused moderate gill damage and a significant increase in the plasma concentration of electrolytes (sodium, chloride and potassium). Taken together, our study demonstrates that higher H₂O₂ treatment temperatures can adversely affect the host and do not improve the effectiveness of the treatment.  相似文献   

Ring Test with the Models LEACHP,PRZM-2 and VARLEACH: Variability between Model Users in Prediction of Pesticide Leaching Using a Standard Data Set     

Colin D. Brown  Ulrike Baer  Petra Günther  Marco Trevisan  Allan Walker 《Pest management science》1996,47(3):249-258

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Emulation Engines: Choice and Quantification of Uncertainty for Complex Hydrological Models     

Daniel W. Gladish  Daniel E. Pagendam  Luk J. M. Peeters  Petra M. Kuhnert  Jai Vaze 《Journal of Agricultural, Biological & Environmental Statistics》2018,23(1):39-62

Complex, mechanistic hydrological models can be computationally expensive, have large numbers of input parameters, and generate multivariate output. Model emulators can be constructed to approximate these complex models with substantial computational savings, making activities such as sensitivity analysis, calibration and uncertainty analysis feasible. Success in the use of an emulator relies on it making accurate and precise predictions of the model output. However, it is often unclear what type of emulation approach will be suitable. We present a comparison of reduced-rank, multivariate emulators built upon different ‘emulation engines’ and apply them to the Australian Water Resource Assessment System model. We examine first-order and second-order approaches which focus on specifying the mean and covariance, respectively. We also introduce a nonparametric approach for quantifying the uncertainty associated with the emulated prediction where this has bounded support. Our results demonstrate that emulation engines based on second-order approaches, such as Gaussian processes, can be computationally burdensome and may be comparable in performance to computationally efficient, first-order methods such as random forests.Supplementary materials accompanying this paper appear online.  相似文献   

Corky-root symptoms for coffee in central Veracruz are linked to the root-knot nematode Meloidogyne paranaensis,a new report for Mexico     

Daniel Lopez-Lima  Petra Sánchez-Nava  Gloria Carrion  Alejandro Espinosa de los Monteros  Luc Villain 《European journal of plant pathology / European Foundation for Plant Pathology》2015,141(3):623-629

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