Radioisotope and stable isotope ratios (Δ14C, δ15N) suggest larval lamprey growth is dependent on both fresh and aged organic matter in streams     

Thomas M. Evans  Amber R. Bellamy  James E. Bauer 《Ecology of Freshwater Fish》2019,28(3):365-375

Lampreys have a complex life cycle which includes a multi‐year infaunal larval stage (ammocoete). Gut content analysis has generally identified detritus (i.e., unidentifiable organic matter) as the major dietary component to ammocoetes, though algae can also be important. However, gut content preserves only a snapshot of the animal's diet and does not reflect assimilated material. In order to better characterise the nutritional sources supporting ammocoete growth, we analysed ammocoete body tissue and potential dietary sources at two streams using natural Δ¹⁴C and δ¹⁵N to estimate time‐integrated nutritional support. Bayesian isotope mixing models revealed differences in the importance of sources supporting ammocoetes between sites. Ammocoetes from a stream in a mixed land usage area (~50% agriculture, ~40% forest and ~10% developed) were primarily supported (mean: ~50%) by fresh terrestrial organic matter but were also supported by substantial contributions (mean: ~30%) by aged organic matter (AOM) and autochthonous material (algae; mean ~20%). In a predominantly forested (~90%) headwater stream, different modelling scenarios (uninformed or informed priors) suggested that algal support of ammocoete nutrition ranged from 7% to 45%. However, the model relying on informed priors developed from gut content analysis produced the low estimates, suggesting these were more reliable. When algae were a minor component of the nutrition at the forested site, ammocoetes were highly dependent on AOM (83 ± 26%; mean ± SD). Based on these findings, ammocoete growth and development are predicted to be strongly influenced by both land use and the availability of allochthonous and autochthonous materials of varying ages within streams.  相似文献   

Prince edward island. Scrapie in prince edward island          下载免费PDF全文

Bildfell R  Brocklebank J  Doherty T  Bellamy C 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(7):438

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Coral gas: oxygen production in millepora on the great barrier reef     

Bellamy N  Risk MJ 《Science (New York, N.Y.)》1982,215(4540):1618-1619

Large volumes of a gas consisting of 69 percent molecular oxygen and 31 percent molecular nitrogen with trace amounts of carbon monoxide, carbon dioxide, and methane have been found trapped inside skeletons of the common hydrozoan Millepora. Volumes were low in the morning and reached a maximum by late afternoon. The oxygen was probably produced by the endolithic (boring) algae, with which the Millepora skeletons are very heavily infested. Oxygen production by endolithic algae in Millepora and in other substrates could influence estimates of reef productivity based on measurements of dissolved gases.  相似文献   

Gravel impaction in a 2-year-old Morgan gelding.          下载免费PDF全文

B J Gilroy  J Bellamy 《The Canadian veterinary journal. La revue veterinaire canadienne》1998,39(11):706-708

An unusual case of impaction colic caused by the ingestion of large quantities of gravel. The clinical presentation, surgical findings, and outcome are described.  相似文献   

A New Name for the Journal/Un nouveau titre pour la revue          下载免费PDF全文

J.E.C. Bellamy 《Canadian journal of veterinary research》1986,50(1):1-2

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Comparative virulence of different bovine rotavirus isolates.   总被引：4，自引：1，他引：3       下载免费PDF全文

M Carpio  J E Bellamy    L A Babiuk 《Canadian journal of veterinary research》1981,45(1):38-42

Intestinal loops, ligated in colostrum-deprived calves were used to compare the virulence of four isolates of bovine rotavirus. Histopathological studies were carried out on infected and control loops and measurements of villous length, crypt depth, villus:crypt ratio and crypt mitotic index were recorded. Pathological changes associated with the rotaviruses included villous atrophy, flattening of absorptive epithelium and reduced villus:crypt ratios. The changes were confined to infected intestinal loops in which the presence of virus was demonstrated by specific immunofluorescence. Consistent differences in the measured histopathological changes suggested differences in virulence among the rotavirus isolates tested. The least virulent rotavirus isolate had a polypeptide electrophoretic pattern that differed from the other three more virulent isolates.  相似文献   

Letter to the Editor     

Bellamy AW 《Science (New York, N.Y.)》1963,139(3555):682-682

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Serving society first: a time for change in veterinary medicine     

Eyre P  Nielsen NO  Bellamy JE 《Journal of the American Veterinary Medical Association》2004,225(1):40-41

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Physicochemical Characteristics of Biochars Derived From Corn,Hardwood, Miscanthus,and Horse Manure Biomasses     

Kurt Nagel  M. Abdul Mottaleb  Jonathan Wistrom  Michael Bellamy 《Communications in Soil Science and Plant Analysis》2019,50(8):987-1002

Biochar, a carbon-rich by-product of biomass pyrolysis, is widely recognized as a potential ingredient for soil amendment, fertility, and carbon sequestration owing to its favorable physicochemical properties. The objective of this study was to investigate the chemical and physical properties of biochars produced through pyrolysis at 450°C from agricultural residues available in Northwest Missouri, namely hardwood (HW), corn stover (CR), miscanthus (MS), and horse manure (HM). These properties were assessed through the analysis of pyrolysis yield, pH, volatile matter, fixed carbon, ash and carbon (C), hydrogen (H), sulfur (S), nitrogen (N) contents, trace metal concentrations, surface morphology, surface functional groups, bulk density, and water holding capacity. The biochars derived from HW, MS and CR materials showed high volatile-matter (33–42%), high fixed carbon contents (42–47%), very low ash contents (6–15%), and low bulk density (0.14–0.28 g cm^?3) as compared to that of HM. A wide range of trace elements was observed in biochar samples with significant differences in concentrations. In addition, CR, HW and MS biochars displayed a disordered graphitic-like structure with well-developed pores and surface areas of 23, 70 and 90 m²/g respectively, and high water-holding capacity up to 750%, indicating their potential application as a soil amendment.  相似文献   

An inter-laboratory comparison of multi-enzyme and multiple substrate-induced respiration assays to assess method consistency in soil monitoring     

Rachel E. Creamer  Pat Bellamy  Helaina I. J. Black  Clare M. Cameron  Colin D. Campbell  Paul Chamberlain  Jim Harris  Nisha Parekh  Mark Pawlett  Jan Poskitt  Dote Stone  Karl Ritz 《Biology and Fertility of Soils》2009,45(6):623-633

The use of indicators in soil monitoring schemes to detect changes in soil quality is receiving increased attention, particularly the application of soil biological methods. However, to date, the ability to compare information from different laboratories applying soil microbiological techniques in broad-scale monitoring has rarely been taken into account. This study aimed to assess the consistency and repeatability of two techniques that are being evaluated for use as microbiological indicators of soil quality: multi-enzyme activity assay and multiple substrate-induced respiration (MSIR). Data were tested for intrinsic (within-assay plate) variation, inter-laboratory repeatability (geometric mean regression and correlation coefficient) and land-use discrimination (principal components analysis). Intrinsic variation was large for both assays suggesting that high replicate numbers are required. Inter-laboratory repeatability showed diverging patterns for the enzyme assay and MSIR. Discrimination of soils was significant for both techniques with relatively consistent patterns; however, combined laboratory discrimination analyses for each technique showed inconsistent correspondence between the laboratories. These issues could be addressed through the adoption of reliable analytical standards for biological methods along with adequate replication. However, until the former is addressed, dispersed analyses are not currently advisable for monitoring schemes.  相似文献