Track Counts as a Means of Estimating Population Densities of Bushbuck     

P. B. Odendaal  M. J. Cameron  A. J. Priday 《Southern Forests》2013,75(1):65-68

Counts of bushbuck tracks were used to estimate their population densities. Good correlations were obtained between various indices of track frequency and estimated absolute population density. The technique is therefore recommended for assessing the absolute density of a population. High sampling costs, however, disqualify the technique for detecting small changes in density.  相似文献   

Diagnosis of brucellosis by agglutinins in milk     

H.S. Cameron D.V.M. Ph.D. 《New Zealand veterinary journal》2013,61(3):41-44

Extract

First let me express my appreciation of being the recipient of a Fulbright Fellowship for research in New Zealand and also for the privilege of discussing brucellosis before the New Zealand Veterinary Association.  相似文献   

A comparison of the socio-economic determinants of growth retardation in South African and Filipino infants     

Jones LL  Griffiths PL  Adair LS  Norris SA  Richter LM  Cameron N 《Public health nutrition》2008,11(12):1220-1228

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Effect of heating oxymyoglobin and metmyoglobin on the oxidation of muscle microsomes     

Bou R  Guardiola F  Codony R  Faustman C  Elias RJ  Decker EA 《Journal of agricultural and food chemistry》2008,56(20):9612-9620

Myoglobin (Mb) and its iron have been proposed to be major prooxidants in cooked meats. To understand the mechanisms and differentiate between the prooxidant and antioxidant potential of oxymyoglobin (OxyMb) and metmyoglobin (MetMb), their prooxidant activity, iron content, solubility, free radical scavenging activity, and iron binding capacity were determined as a function of thermal processing. The ability of native and heat denatured OxyMb and MetMb to promote the oxidation of muscle microsomes was different. MetMb promoted lipid oxidation in both its native and denatured states. Conversely, OxyMb became antioxidative when the protein was heated to temperatures >or=75 degrees C. The increased antioxidant activity of heat denatured OxyMb was likely due to a decrease in its prooxidative activity due to its loss of solubility. These data show that the impact on oxidative reactions of Mb is the result of the balance between its antioxidant and prooxidant activities.  相似文献   

Soil carbon increases with long-term cattle stocking in northern temperate grasslands     

Edward W. Bork  Lisa L. Raatz  Cameron N. Carlyle  Daniel B. Hewins  Karen A. Thompson 《Soil Use and Management》2020,36(3):387-399

Grassland management aimed at enhancing carbon (C) in soil is an important tool in mitigation of rising atmospheric CO₂, yet little is known of how grassland soil C changes with livestock stocking rate (SR). We relate soil organic and inorganic C mass (t ha⁻¹ to 60 cm depth) with cattle stocking over periods of 7–27 year for 32 paddocks distributed across nine community pastures in the mixed-grass prairie of Saskatchewan, Canada. Initial analysis comparing Akaike information criterion models showed that cattle SR explained a greater proportion of variance in soil C, particularly soil organic C, than rainfall. Soil organic C mass increased with cattle SR (R² = .293; p = .001), even when the latter was normalized to account for differences in vegetation composition and growing conditions among pastures. Normalized SR varied from 0.49 to 2.30 times recommended levels, over which SOC increased from 24.7 to 57.4 t ha⁻¹. Increases in soil organic C under greater stocking coincided with increased abundance of introduced vegetation, particularly the rhizomatous grass Poa pratensis. Inorganic soil C accounted for 34.6% of total soil C, being particularly large below 30 cm soil depth, but did not vary with stocking rate. These findings indicate that both organic and inorganic C are important pools of C in northern temperate grassland soils, with soil organic C positively associated with long-term cattle SR. Further studies are recommended to understand more fully the mechanisms regulating grazing impacts on soil C mass in northern temperate grasslands.  相似文献   

Development of a vision impairment score for the assessment of functional vision in dogs: Initial evidence of validity,reliability, and responsiveness     

Kathleen L. Graham  Jacky Reid  Cameron J. G. Whittaker  Evelyn J. S. Hall  Kelly Caruso  Christina I. McCowan  Andrew White 《Veterinary ophthalmology》2019,22(6):807-818

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Northern Bobwhite (Colinus virginianus) Space Use Minimally Affected by Oil and Gas Development     

Cameron A. Duquette  Craig A. Davis  Samuel D. Fuhlendorf  R. Dwayne Elmore 《Strength and Conditioning Journal》2019,72(3):484-491

Despite the fact that the northern bobwhite (Colinus virginianus Linnaeus; hereafter, bobwhite) is one of the most well-studied and widely distributed wildlife species in North America, we know little about how bobwhite respond to oil and gas infrastructure. We investigated the impacts of oil and gas development on space use of bobwhite using a multiseason approach. We captured and monitored bobwhite in the breeding season (1 April–30 September, n = 135 individuals) and nonbreeding season (1 October–31 March, n = 30 coveys) and modeled their habitat selection in a resource-utilization function (third order, within home range selection) and resource-selection function (second order, home range selection) format. Generally, energy infrastructure effects on bobwhite were neutral, but breeding season bobwhite did select for areas near low-traffic roads (β = ? 0.31 ± 0.15 SE). In the nonbreeding season, coveys selected for areas within their home range with a limited viewshed (i.e., areas with limited visibility of anthropogenic structures; β = ? 0.03 ± 0.02 SE). Selection differed between sexes for well pads (t = ? 2.12, P = 0.04) but was otherwise similar. At the level of home range selection, bobwhite exhibited a preference for areas with a low density of oil and gas wells and a high density of low-traffic roads during both the breeding and nonbreeding seasons (breeding: β_well = ? 0.14 ± 0.02, β_road = 0.26 ± 0.27; nonbreeding: β_well = ? 0.08 ± 0.03, β_road = 0.16 ± 0.03). As a generalist species, bobwhite appear to be largely tolerant of energy infrastructure and associated disturbances at moderate levels of development but may be sensitive to high densities of oil and gas pads.  相似文献   

Cobalt accumulation in horses following repeated administration of cobalt chloride     

RG Wenzel  D Major  KF Hesp  E Hall  P Doble 《Australian veterinary journal》2019,97(11):465-472

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War and Health of Animals Division     

A. E. Cameron 《Canadian journal of veterinary research》1942,6(2):46-49

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Fly Sprays and Repellents: Part I. Live Stock Sprays     

T. W. M. Cameron 《Canadian journal of veterinary research》1941,5(10):275-282

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