A prediction model for strike in the sheep nasal fly, Oestrus ovis, in Namibia     

H. C. Biggs  E. McClain  G. L. Muller  M. Anthonissen  K. M. Hare 《Preventive veterinary medicine》1998,33(1-4):267-282

A model was developed for predicting outbreaks of Oestrus ovis throughout the main sheep farming areas of Namibia. Pupal developmental periods were studied, concomitant air and soil temperatures enabling degree-day calculations to be made for prediction of adult fly strike. Monitoring of larval infection established seasonal incidence of O. ovis infestation and acted as verification of predictions. The establishment of relevant isothermal maps for Namibia made possible extrapolation from the several study sites to the entire sheep farming area. Retrospective and actual predictions of the important first peak after winter were considered accurate enough to recommend timing of control measures. No evidence of overwintering of first stage instars was found, the strategy used instead being extended pupation. Adult fly energy reserves were determined.  相似文献   

Conservation of Canadian animal genetic resources          下载免费PDF全文

Hare D 《The Canadian veterinary journal. La revue veterinaire canadienne》1992,33(1):3-5

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Embryo transfer in relation to bovine leukemia virus control and eradication   总被引：3，自引：2，他引：1  

Hare WC  Mitchell D  Singh EL  Bouillant AM  Eaglesome MD  Ruckerbauer GM  Bielanski A  Randall GC 《The Canadian veterinary journal. La revue veterinaire canadienne》1985,26(8):231-234

Two hundred and seven, zona pellucida-intact bovine embryos were collected from bovine leukemia virus-infected donors, washed, and transferred to uninfected recipients: 111 of these embryos were sired by bovine leukemia virus-infected bulls. Fifty live calves were obtained from the 57 pregnancies resulting from the transfers. None of the recipients or calves developed antibodies to bovine leukemia virus. Nine zona-intact ova, 12 zona-intact morulae and 15 hatched blastocysts, exposed “in vitro” to bovine leukemia virus, washed and then tested for bovine leukemia virus were negative. Twenty-seven, zona-intact embryos and 14 hatched embryos were similarly exposed and washed prior to being transferred in groups to two uninfected recipients: no pregnancies resulted, nor did the recipients develop antibodies to bovine leukemia virus up to 120 days posttransfer. The conclusion from these and other bovine leukemia virus studies is that zona-intact embryos can be transferred from bovine leukemia virus-infected donors, including those bred by bovine leukemia virus-infected bulls, without risk of transmitting bovine leukemia virus, providing that they are properly washed prior to transfer.  相似文献   

The wording is important          下载免费PDF全文

Hare D 《The Canadian veterinary journal. La revue veterinaire canadienne》2004,45(8):637-638

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A Regional Method For The Complete Anaesthetization And Immobilization Of The Bovine Eye And Its Associated Structures          下载免费PDF全文

W. C. D. Hare 《Canadian journal of veterinary research》1957,21(7):228-234

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Editor's note          下载免费PDF全文

Hare D 《The Canadian veterinary journal. La revue veterinaire canadienne》1997,38(12):744

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A PHOTOELECTRIC COLORIMETER     

Hare K  Phipps RE 《Science (New York, N.Y.)》1938,88(2276):153-154

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Predicting perchlorate exposure in milk from concentrations in dairy feed     

Rice CP  Baldwin Vi RL  Abbott LC  Hapeman CJ  Capuco AV  Le A  Bialek-Kalinski K  Bannerman DD  Hare WR  Paape MJ  McCarty GW  Kauf AC  Sadeghi AM  Starr JL  McConnell LL  Van Tassell CP 《Journal of agricultural and food chemistry》2007,55(21):8806-8813

Perchlorate has been detected in U.S. milk samples from many different states. Applying data from a recently reported 9-week experiment in which 16 Holstein dairy cows were administered perchlorate allowed us to derive an equation for the dose-response relationship between perchlorate concentrations in feed/drinking water and its appearance in milk. Examination of background concentrations of perchlorate in the total mixed ration (TMR) fed in addition to the variable dose supplied to treated cows as a ruminal infusate revealed that cows receive significant and variable exposure to perchlorate from the TMR. Weekly examination of the TMR disclosed that a change in ingredients midway through the experiment caused a significant (78%) change in TMR perchlorate concentration. Analyses of the ingredients comprising the TMR revealed that 41.9% of the perchlorate came from corn silage, 22.9% came from alfalfa hay and 11.7% was supplied by sudan grass. Finally, USDA Food and Nutrition Survey data on fluid milk consumption were used to predict potential human exposure from milk that contained concentrations of perchlorate observed in our previous dosing study. The study suggests that reducing perchlorate concentration in dairy feed may reduce perchlorate concentrations in milk as well as the potential to reduce human exposure to perchlorate in milk.  相似文献   

Letters to the Editor ◆ Lettres À La Rédaction: Inappropriate title          下载免费PDF全文

Doug Hare 《The Canadian veterinary journal. La revue veterinaire canadienne》1997,38(6):331

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Design and evaluation of a veterinary information system for Namibia     

K. M. Hare  H. C. Biggs 《Preventive veterinary medicine》1996,26(3-4):239-251

A computer system for collection of animal disease and related data was set up by the Directorate of Veterinary Services in 1985, and data are available from 1986 up to the present. The nationwide system consists of detailed disease and herd health data from field veterinarians, disease and related data (such as grazing and animal condition, vaccinations and farmer treatments) from animal health inspectors, laboratory results and investigations, and abattoir data. More recently, a socio-economic component has also been added. Considerable care has been taken to link related information. In addition, all data are geographically linked through a placename co-ordinate and attribute file, and a crude but effective automated map presentation system exists. The standard objectives of an information system (which were not historically met), namely, to facilitate the collection of complete, accurate, timely and relevant data which are easily accessible and processible, and in this way provide a better basis for management decision-making as well as for specific studies and queries, were strived for. The system has proved particularly valuable in terms of automation of routine reports and in answering ad hoc queries. It is underutilised with regard to epidemiological studies, but we feel that it holds great potential.  相似文献