Climatic Limits on Landscape Development in the Northwestern Himalaya   总被引：1，自引：0，他引：1  

N Brozović  DW Burbank  AJ Meigs 《Science (New York, N.Y.)》1997,276(5312):571-574

The interaction between tectonism and erosion produces rugged landscapes in actively deforming regions. In the northwestern Himalaya, the form of the landscape was found to be largely independent of exhumation rates, but regional trends in mean and modal elevations, hypsometry (frequency distribution of altitude), and slope distributions were correlated with the extent of glaciation. These observations imply that in mountain belts that intersect the snowline, glacial and periglacial processes place an upper limit on altitude, relief, and the development of topography irrespective of the rate of tectonic processes operating.  相似文献   

Experimental infection of goats with Brucella ovis     

G. W. BURGESS  T. L. SPENCER  M. J. NORRIS 《Australian veterinary journal》1985,62(8):262-264

Six goats were inoculated with Brucella ovis. Two goats were inoculated with infected semen by the intratesticular route and 2 each by installation of the semen on to the nasal or preputial epithelium. All goats produced antibody responses as measured by an enzyme-linked immunosorbent assay (ELISA) procedure and the serums of 5 goats reacted in complement fixation tests for B. ovis. The 2 goats inoculated by the intratesticular route and one receiving B. ovis instilled intranasally subsequently excreted B. ovis in their semen. The possibility of natural transmission is discussed.  相似文献   

Resection and anastomosis of the small colon in four horses     

AJ DART  JR SNYDER  JR PASCOE 《Australian veterinary journal》1992,69(1):5-7

Resection and anastomosis of the small colon was performed on 4 horses with vascular lesions (strangulating lipoma, mesenteric tear, dissecting haematoma) or functional obstruction (stricture) of this area of the bowel. The anastomoses were performed using a variety of suture materials in 2 layers. An appositional, full-thickness, simple, interrupted pattern was used in the first layer in all cases and oversewn with either a Cushing pattern (3 cases) or a Utrecht pattern (1 case). Post-operative complications associated with suture material and surgical technique were not seen. All horses were discharged from the hospital and all were alive more than one year after discharge.  相似文献   

Comparison of immunogenicity and virulence between Babesia bigemina parasites from continuous culture and from a splenectomised calf   总被引：1，自引：0，他引：1  

WK. JORGENSEN  AJ. DE. VOS  RJ. DALGLIESH † 《Australian veterinary journal》1989,66(11):371-372

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Pathogenicity for sheep of recent Australian bluetongue virus isolates     

AJ FORMAN  PT HOOPER  PM LE BLANC SMITH 《Australian veterinary journal》1989,66(8):261-262

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A survey of cattle producers in the Boophilus microplus endemic area of Queensland to determine attitudes to the control of and vaccination against tick fever     

RE BOCK  GW BLIGHT†  TG KINGSTON  AJ de  VOS 《Australian veterinary journal》1995,72(3):88-92

SUMMARY: A survey by mail was used to determine the views of beef producers in the Boophilus microplus endemic area of Queensland on the control of and vaccination against tick fever. Data from 448 questionnaires were analysed, representing 2.7% of beef producers in the survey area. Producers considered buffalo fly ( Haematobia irritans exigua ) infestation as the most important problem whereas tick fever ranked sixth overall. Private veterinarians were regarded as the most important source of information on vaccines for cattle followed by a weekly rural newspaper. From the survey we estimate that about 33% of producers used the tick fever vaccine produced by the Tick Fever Research Centre of Queensland Department of Primary Industries but there were significant (P < 0.05) variations between regions and herds. Large herds (≥ 400 head) in south-east Queensland were the most likely to be vaccinated against tick fever. Of the producers who did not use the vaccine, over 70% replied that there was no need to vaccinate because of the low risk of the disease in their herds. In 52% of unvaccinated herds the treatment of animals with acaricide was considered the most important means of tick fever control and 61% of these herds comprised Bos indicus x Bos taurus or Bos indicus cattle.  相似文献   

Unusual Polydactylism in a Foal: A Case Report   总被引：1，自引：0，他引：1  

SPENCER M. BARBER DVM  DiplomateACVs 《Veterinary surgery : VS》1990,19(3):203-207

A 2 month old quarter horse colt had multiple skeletal abnormalities of the left fore limb, including two supernumerary metacarpal bones, two supernumerary carpal bones, abnormal carpal bone development, and a valgus deformity originating at the carpal joint. The largest supernumerary metacarpal bone was removed completely, a portion of the smaller supernumerary metacarpal bone was removed, and the leg was placed in a tube cast. Surgical treatment improved the clinical appearance and prevented further injury to the limb. The carpal joint width remained increased but the carpal valgus deformity partially responded to hemicircumferential periosteal transection. The foal was sound 2 1/2 years after surgery.  相似文献   

Premature farrowings caused by feeding cottonseed meal   总被引：1，自引：0，他引：1  

RJ LOVE  AJ PEACOCK  G EVANS † 《Australian veterinary journal》1990,67(6):223-226

Increasing the level of cottonseed meal (CSM) in sow diets from less than 5% to 10% increased the incidence of premature farrowings (gestation length less than 111 days) from 1.1% to 2.7% (p less than 0.001) and reduced the mean gestation length from 114.07 +/- 1.53 to 113.70 +/- 1.59 days (p less than 0.0001). Survival of piglets born prematurely was poor. After removal of CSM from the diet there was a residual effect lasting several weeks before the gestation length returned to normal. Experimental feeding of diets containing 20% and 40% CSM to small groups of sows caused significant shortening of gestation length and 3 of 26 sows fed 40% CSM farrowed prematurely. The mechanism by which CSM causes this effect has yet to be determined.  相似文献   

Australian veterinarian awarded the Nobel Prize for Medicine     

AJ HUSBAND 《Australian veterinary journal》1997,75(1):32-32

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Sporodesmin toxicosis in an alpaca     

MA COULTON  AJ DART  SA McCLINTOCK  DR HODGSON 《Australian veterinary journal》1997,75(2):136-137

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