Modelling the determinants of grassland stocking rates on dairy farms in England and Wales     

C.J. Doyle 《Agricultural Systems》1982,9(2):83-95

An attempt has been made to provide a quantitative model of grassland management on a dairy farm which could be used for predictive purposes to establish appropriate stocking rates in relation to the resources available and the consequences of changing the level of resources used. The model takes into account the effect of rainfall, the available water capacity of the soil, soil drainage and fertiliser usage on grass production and the calving pattern, milk yield and availability of other feeds in determining grass requirements. Allowance is made for the fact that the response to unpredictable variation in grass production may be to under-stock. There was reasonably good agreement between predicted and actual stocking rates for a group of 33 dairy farms, but the predictions were too variable for acceptance of the model as a reliable aid in management planning on individual farms. Nonetheless, the model showed sufficient promise to suggest that it may be feasible to make predictions for individual farms in the future if a clearer understanding of a number of aspects of grassland management can be obtained: most notably, how farmers respond to risk, how managerial ability and financial constraints affect stocking intensity and how farmers integrate, in practice, grazing and conservation.  相似文献   

Heartworm treatment--NRA decision opposed     

Doyle K 《Australian veterinary journal》2001,79(2):74

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AVA's UK FMD scheme gives worthwhile results for Australia     

Doyle K 《Australian veterinary journal》2001,79(8):518-518

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Diagnostic findings and prognosis following arthroscopic treatment of subtle osteochondral lesions in the shoulder joint of horses: 15 cases (1996-1999)     

Doyle PS  White NA 《Journal of the American Veterinary Medical Association》2000,217(12):1878-1882

OBJECTIVE: To determine clinical, scintigraphic, radiographic, and arthroscopic findings and results of treatment in horses with lameness attributable to subtle osteochondral lesions of the shoulder joint. DESIGN: Retrospective study. ANIMALS: 15 horses. PROCEDURE: Medical records were reviewed, and results of physical examination, scintigraphy, radiography, arthroscopy, and treatment were recorded. RESULTS: Severity of lameness ranged from grade 1 to 4. Response to shoulder flexion or extension was variable. Twelve horses had a narrow upright foot. Intra-articular anesthesia of the shoulder joint localized the cause of the lameness to the shoulder joint in 9 of 10 horses. Scintigraphic abnormalities were detected in 4 of 6 horses. Radiographic lesions were subtle and included glenoid sclerosis, focal glenoid lysis, small glenoid cysts, and alterations in the humeral head contour. Arthroscopic evaluation confirmed clefts in the glenoid cartilage, glenoid cysts, a humeral head cyst, fibrillation of the humeral head cartilage, cartilage fragmentation, or a nondisplaced fracture of the humeral head. After treatment, 12 horses returned to their previous level of performance, 1 was sound for light riding, 1 remained lame, and 1 was euthanatized because of chronic lameness. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggest that a combination of physical examination, scintigraphy, and radiography is necessary to diagnose subtle osteochondral lesions of the shoulder joint in horses. Arthroscopy can be used to confirm the diagnosis and treat cartilage and subchondral bone lesions. Young and middle-aged horses with subtle osteochondral lesions of the shoulder joints have a good prognosis for return to performance following arthroscopic treatment.  相似文献   

Managing animal wellbeing: a preliminary survey of pig farmers     

RL Wilson  PK Holyoake  GM Cronin  RE Doyle 《Australian veterinary journal》2014,92(6):206-212

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Canine superficial bacterial pyoderma: evaluation of skin surface sampling methods and antimicrobial susceptibility of causal Staphylococcus isolates     

PA Ravens  LJ Vogelnest  E Ewen  KL Bosward  JM Norris 《Australian veterinary journal》2014,92(5):149-155

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Standing Laparoscopic Peritoneal Flap Hernioplasty of the Vaginal Rings does not Modify the Sperm Production and Motility Characteristics in Intact Male Horses     

LA Gracia‐Calvo  LJ Ezquerra  M Martín‐Cuervo  ME Durán  H Tapio  JM Gallardo  FJ Peña  C Ortega‐Ferrusola 《Reproduction in domestic animals》2014,49(6):1043-1048

Laparoscopic hernioplasty techniques have been developed in the recent years to avoid the recurrence of inguinal hernias and to spare the testicles for breeding purposes in stallions. However, there have been no previous comprehensive and systematic studies of the reproductive outcomes and prognoses for stallions after inguinal hernioplasty. Therefore, the objective of this study was to assess the possible effects of one of these techniques (standing laparoscopic peritoneal flap hernioplasty) on the sperm production and motility characteristics of six healthy stallions that received this procedure based on 1‐year follow‐ups. There were no significant differences in the measured sperm variables (assessments based on the DSO, MOT, PMOT, VSL, VCL and VAP) during 1‐year follow‐ups.  相似文献   

The genome sequence of Drosophila melanogaster   总被引：2，自引：0，他引：2  

Adams MD  Celniker SE  Holt RA  Evans CA  Gocayne JD  Amanatides PG  Scherer SE  Li PW  Hoskins RA  Galle RF  George RA  Lewis SE  Richards S  Ashburner M  Henderson SN  Sutton GG  Wortman JR  Yandell MD  Zhang Q  Chen LX  Brandon RC  Rogers YH  Blazej RG  Champe M  Pfeiffer BD  Wan KH  Doyle C  Baxter EG  Helt G  Nelson CR  Gabor GL  Abril JF  Agbayani A  An HJ  Andrews-Pfannkoch C  Baldwin D  Ballew RM  Basu A  Baxendale J  Bayraktaroglu L  Beasley EM  Beeson KY  Benos PV  Berman BP  Bhandari D  Bolshakov S  Borkova D  Botchan MR  Bouck J 《Science (New York, N.Y.)》2000,287(5461):2185-2195

The fly Drosophila melanogaster is one of the most intensively studied organisms in biology and serves as a model system for the investigation of many developmental and cellular processes common to higher eukaryotes, including humans. We have determined the nucleotide sequence of nearly all of the approximately 120-megabase euchromatic portion of the Drosophila genome using a whole-genome shotgun sequencing strategy supported by extensive clone-based sequence and a high-quality bacterial artificial chromosome physical map. Efforts are under way to close the remaining gaps; however, the sequence is of sufficient accuracy and contiguity to be declared substantially complete and to support an initial analysis of genome structure and preliminary gene annotation and interpretation. The genome encodes approximately 13,600 genes, somewhat fewer than the smaller Caenorhabditis elegans genome, but with comparable functional diversity.  相似文献   

The biomedical research bottleneck     

Cech TR  Egan LW  Doyle C  Gallin E  Lichtman MA  Queenan CJ  Sung N 《Science (New York, N.Y.)》2001,293(5530):573

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Rain-forest prosimians     

Doyle GA 《Science (New York, N.Y.)》1977,198(4320):923-924

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