Demodicosis in a Toggenburg goat     

Brügger M  Braun U 《Schweizer Archiv für Tierheilkunde》2000,142(11):639-642

This report describes the findings in a four-year-old Toggenburg goat with demodicosis. The skin had multifocal nodules, which were approximately 5 mm in diameter and contained thick yellow exsudate. Microscopic examination of the exsudate revealed numerous Demodex caprae. The goat was clipped and treated topically every five to seven days for a total of 12 treatments with a 1:100 dilution of amitraz (Ectodex, Hoechst Roussel Vet). The treatment resulted in a marked decrease in the number of skin nodules. However, new nodules appeared after treatment was discontinued and complete clinical cure was not achieved.  相似文献   

Die wirtschaftliche Situation der Obstbaubetriebe in Sachsen-Anhalt in den Wirtschaftsjahren 2001/02 bis 2003/04 im Vergleich zu Deutschland     

Eva Röder 《Erwerbs-Obstbau》2006,48(1):17-20

The profit of fruit producing enterprises in Saxony-Anhalt as well as in whole Germany has continually improved during the last years. This concerns the profit as well as the profitableness, the solvency and the economic stability of the enterprises. Especially related to the profitableness the enterprises do not reach the target amount. Therefore it must be object, to rise the profitability in the long run and to pay off all factors of production in order to guarantee long-term solvency and economic stability.  相似文献   

Determining landscape extent for succession and disturbance simulation modeling     

Eva C. Karau  Robert E. Keane 《Landscape Ecology》2007,22(7):993-1006

Dividing regions into manageable landscape units presents special problems in landscape ecology and land management. Ideally, a landscape should be large enough to capture a broad range of vegetation, environmental and disturbance dynamics, but small enough to be useful for focused management objectives. The purpose of this study was to determine the optimal landscape size to summarize ecological processes for two large land areas in the southwestern United States. We used a vegetation and disturbance dynamics model, LANDSUMv4, to simulate a set of nine scenarios involving systematically varied topography, map resolution, and model parameterizations of fire size and fire frequency. Spatial input data were supplied by the LANDscape FIRE Management Planning System (LANDFIRE) prototype project, an effort that will provide comprehensive and scientifically credible mid-scale data to support the National Fire Plan. We analyzed output from 2,000 year simulations to determine the thresholds of landscape condition based on the variability of burned area and dominant vegetation coverage. Results show that optimal landscape extent using burned area variability is approximately 100 km² depending on topography, map resolution, and model parameterization. Variability of dominant vegetation area is generally higher and the optimal landscape sizes are larger in comparison to those features determined from burned area. Using the LANDFIRE project as a case study, we determined landscape size and map resolution for a large mapping project, and showed that optimal landscape size depends upon geographical, ecological, and management context. This paper was written and prepared by U.S. Government employees on official time, and therefore is in the public domain and not subject to copyright. The use of trade or firm names in this paper is for reader information and does not imply endorsement by the U.S. Department of Agriculture of any product or service.  相似文献   

Fish genotype significantly influences susceptibility of juvenile rainbow trout, Oncorhynchus mykiss (Walbaum), to waterborne infection with infectious salmon anaemia virus     

Biacchesi S  Le Berre M  Le Guillou S  Benmansour A  Brémont M  Quillet E  Boudinot P 《Journal of fish diseases》2007,30(10):631-636

  相似文献   

Staaren und Sperlinge     

Brűrkner 《European Journal of Forest Research》1866,10(1):117-117

Ohne Zusammenfassung  相似文献   

Prevalence of antibodies to four bovine rotavirus strains in different age groups of cattle   总被引：1，自引：0，他引：1  

H Brüssow  W Eichhorn  J Sotek  J Sidoti 《Veterinary microbiology》1990,25(2-3):143-151

Neutralizing antibody titers to four bovine rotavirus strains, representing three serotypes, were measured in 160 sera from cattle of different age groups. Age-specific seroprevalence analysis revealed serotype 6, represented by bovine rotavirus (BRV) NCDV, as the predominant rotavirus serotype infecting German cattle and serotype 10, represented by BRV V1005, as the least prominent. Infections with serotype 8, represented by BRV 678, occurred with intermediate frequency. Antibodies of young calves distinguished between NCDV and UK virus, two serotype 6 BRV strains differing in VP4 antigen.  相似文献   

Mitteilung von Beobachtungen bei Untersuchungen über die Einwirkung der neuen Kontaktinsektizide auf Wachsmotten und Seidenraupen     

Dr. Walter Bröker 《Journal of pest science》1953,26(6):88-89

Ohne Zusammenfassung  相似文献   

Axial and radial water flow in the trunks of oak trees: a quantitative and qualitative analysis   总被引：1，自引：0，他引：1  

Granier A  Anfodillo T  Sabatti M  Cochard H  Dreyer E  Tomasi M  Valentini R  Bréda N 《Tree physiology》1994,14(12):1383-1396

Axial water flow in the trunks of mature oak trees (Quercus petraea (Matt.) Liebl. and Q. robur L.) was studied by four independent techniques: water absorption from a cut trunk, sap flowmeters, heat pulse velocity (HPV) and thermoimaging. Estimation of the total water flow with sap flowmeters, HPV and water absorption yielded comparable results. We concluded from dye colorations, thermograms and axial profiles of sap flow and heat pulse velocity that, in intact trunks, most of the flow occurred in the current-year ring, where early-wood vessels in the outermost ring were still functional. Nevertheless, there was significant flow in the older rings of the xylem. Total water flow through the trunk was only slightly reduced when air embolisms were artificially induced in early-wood vessels, probably because there was little change in hydraulic conductance in the root-leaf sap pathway. Embolization of the current-year vessels reactivated transport in the older rings.  相似文献   

Charakterisierung und Inventur der Fichten-Mykorrhizen im Höglwald und deren Reaktionen auf saure Beregnung     

Eva Gronbach  R. Agerer 《European Journal of Forest Research》1986,105(1):329-335

  相似文献   

Fibril angle variability in earlywood of Norway spruce using soft rot cavities and polarization confocal microscopy   总被引：4，自引：0，他引：4  

Anna Bergander  Jonas Br?ndstr?m  Geoffrey Daniel  Lennart Sahnen 《Journal of Wood Science》2002,48(4):255-263

The main purpose of this study was to investigate the variability of the fibril angle of tracheids in earlywood of Norway spruce (Picea abies L. Karst.). Polarization confocal microscopy was chosen and compared with the method utilizing the orientation of soft rot cavities. There was a significant correlation between the soft rot and polarization confocal microscopy methods, which showed the same trend of high fibril angles in the first part of the earlywood followed by a decrease toward the end of earlywood. This declining trend was less pronounced in annual rings containing compression wood. Moreover, large variations in fibril angle occurred between neighboring tracheids. The investigation also emphasized the differences between X-ray diffraction and microscopic methods, as the large variation seen by the latter methods is not seen by the X-ray diffraction approach because of its large area of measurement. No correlation was found between fiber morphology (i.e., average length, width, density) and the average fibril angle in the investigated annual rings.  相似文献