Search Results - "Johnston, D W"

Variation in blubber cortisol levels in a recovering humpback whale population inhabiting a rapidly changing environment by Pallin, L. J., Botero-Acosta, N., Steel, D., Baker, C. S., Casey, C., Costa, D. P., Goldbogen, J. A., Johnston, D. W., Kellar, N. M., Modest, M., Nichols, R., Roberts, D., Roberts, M., Savenko, O., Friedlaender, A. S.

“…Glucocorticoids are regularly used as biomarkers of relative health for individuals and populations. Around the Western Antarctic Peninsula (WAP), baleen…”
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Knee Range of Motion During the First Two Years After Use of Posterior Cruciate-Stabilizing or Posterior Cruciate-Retaining Total Knee Prostheses: A Randomized Clinical Trial by Chaudhary, R, Beaupré, L.A, Johnston, D.W.C

“…BackgroundThe impact of posterior cruciate ligament-substituting and posterior cruciate ligament-retaining devices on the range of motion of the knee following…”
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Effects of fine-scale oceanographic features on the distribution and movements of harbour porpoises Phocoena phocoena in the Bay of Fundy by JOHNSTON, D. W, WESTGATE, A. J, READ, A. J

“…We describe an integrative approach to studying the fine-scale distribution of harbour porpoises Phocoena phocoena in the Bay of Fundy, using satellite…”
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Prey density and depth affect the fine-scale foraging behavior of humpback whales Megaptera novaeangliae in Sitka Sound, Alaska, USA by Burrows, J. A., Johnston, D. W., Straley, J. M., Chenoweth, E. M., Ware, C., Curtice, C., DeRuiter, S. L., Friedlaender, A. S.

“…Humpback whales Megaptera novaeangliae are filter feeders that use discrete lunges to effectively capture densely aggregated prey. The objective of this…”
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Automated detection and enumeration of marine wildlife using unmanned aircraft systems (UAS) and thermal imagery by Seymour, A. C., Dale, J., Hammill, M., Halpin, P. N., Johnston, D. W.

“…Estimating animal populations is critical for wildlife management. Aerial surveys are used for generating population estimates, but can be hampered by cost,…”
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Fin whales Balaenoptera physalus and minke whales Balaenoptera acutorostrata exploit a tidally driven island wake ecosystem in the Bay of Fundy by JOHNSTON, D. W, THORNE, L. H, READ, A. J

“…Marine predators forage in tidally induced oceanographic features, where they exploit predictable aggregations of prey. Very little, however, is known about…”
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Flow-field observations of a tidally driven island wake used by marine mammals in the Bay of Fundy, Canada by JOHNSTON, D. W., READ, A. J.

“…Correlations between fine‐scale oceanographic features and aggregations of marine mammals are frequently reported, but the physical forces shaping these…”
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Why whales are big but not bigger: Physiological drivers and ecological limits in the age of ocean giants by Goldbogen, J A, Cade, D E, Wisniewska, D M, Potvin, J, Segre, P S, Savoca, M S, Hazen, E L, Czapanskiy, M F, Kahane-Rapport, S R, DeRuiter, S L, Gero, S, Tønnesen, P, Gough, W T, Hanson, M B, Holt, M M, Jensen, F H, Simon, M, Stimpert, A K, Arranz, P, Johnston, D W, Nowacek, D P, Parks, S E, Visser, F, Friedlaender, A S, Tyack, P L, Madsen, P T, Pyenson, N D

“…The largest animals are marine filter feeders, but the underlying mechanism of their large size remains unexplained. We measured feeding performance and prey…”
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Guidelines for the treatment of marine mammals in field research by Gales, N.J, Bowen, W.D, Johnston, D.W, Kovacs, K.M, Littnan, C.L, Perrin, W.F, Reynolds, J.E. III, Thompson, P.M

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Deploying Fixed Wing Unoccupied Aerial Systems (UAS) for Coastal Morphology Assessment and Management by Seymour, A.C., Ridge, J.T., Rodriguez, A.B., Newton, E., Dale, J., Johnston, D.W.

“…Seymour, A.C.; Ridge, J.T.; Rodriguez, A.B.; Newton, E.; Dale, J., and Johnston, D.W., 2018. Deploying fixed wing unoccupied aerial systems (UAS) for coastal…”
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Lunge filter feeding biomechanics constrain rorqual foraging ecology across scale by Kahane-Rapport, S R, Savoca, M S, Cade, D E, Segre, P S, Bierlich, K C, Calambokidis, J, Dale, J, Fahlbusch, J A, Friedlaender, A S, Johnston, D W, Werth, A J, Goldbogen, J A

“…Fundamental scaling relationships influence the physiology of vital rates, which in turn shape the ecology and evolution of organisms. For diving mammals,…”
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A Randomized Clinical Trial Comparing Posterior Cruciate-Stabilizing vs Posterior Cruciate-Retaining Prostheses in Primary Total Knee Arthroplasty: 10-Year Follow-Up by Beaupre, Lauren A., Sharifi, B., Johnston, D.W.C.

“…This 10-year follow-up compares health-related quality of life (HRQL) and reoperations in 100 subjects who were randomized to receive posterior cruciate…”
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Variation in sea ice cover on the east coast of Canada from 1969 to 2002: climate variability and implications for harp and hooded seals by Johnston, D. W., Friedlaender, A. S., Torres, L. G., Lavigne, D. M.

“…There is growing evidence that global change and climate variability are affecting sea ice dynamics in northern and eastern Canada. Such variability could have…”
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Interobserver reliability of the radiographic assessment of cement fixation in total hip arthroplasty by Al-Ahaideb, Abdulaziz, Muir, S. W., Huckell, J., Alsaleh, Khalid A., Johnson, M. A., Johnston, D. W. C., Beaupre, L. A.

“…Background The objective of this work is to evaluate the performance of a modified quantitative Barrack Cement grading in primary THA. Previous studies…”
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Total Joint Arthroplasties: Current Concepts of Patient Outcomes after Surgery by Jones, C. Allyson, PhD, Beaupre, Lauren A., PhD, Johnston, D.W.C., MD, FRCS(C), Suarez-Almazor, Maria E., MD, PhD

“…Total hip and knee arthroplasties are effective surgical interventions for relieving hip pain and improving physical function caused by arthritis. Although the…”
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Shaped by Their Environment: Variation in Blue Whale Morphology across Three Productive Coastal Ecosystems by Barlow, D R, Bierlich, K C, Oestreich, W K, Chiang, G, Durban, J W, Goldbogen, J A, Johnston, D W, Leslie, M S, Moore, M J, Ryan, J P, Torres, L G

“…Synopsis Species ecology and life history patterns are often reflected in animal morphology. Blue whales are globally distributed, with distinct populations…”
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Prognostic impact of pre-operative albumin on short-term mortality and complications in patients with hip fracture by Pimlott, Bryan J, Jones, C. Allyson, Beaupre, Lauren A, Johnston, D.W.C, Majumdar, Sumit R

“…Abstract Low serum albumin may have prognostic value for morbidity and mortality in patients with hip fracture. The primary aim of the study was to evaluate…”
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Temporal stability and mixed-stock analyses of humpback whales (Megaptera novaeangliae) in the nearshore waters of the Western Antarctic Peninsula by Albertson, G. R., Friedlaender, A. S., Steel, D. J., Aguayo-Lobo, A., Bonatto, S. L., Caballero, S., Constantine, R., Cypriano-Souza, A. L., Engel, M. H., Garrigue, C., Flórez-González, L., Johnston, D. W., Nowacek, D. P., Olavarría, C., Poole, M. M., Read, A. J., Robbins, J., Sremba, A. L., Baker, C. S.

“…Southern Hemisphere humpback whales breed in tropical waters and migrate to Antarctica to forage. While the breeding grounds are well defined, the population…”
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Comparative effectiveness of alternative clinical pathways for primary hip and knee joint replacement patients: a pragmatic randomized, controlled trial by Gooch, K, Marshall, D.A, Faris, P.D, Khong, H, Wasylak, T, Pearce, T, Johnston, D.W.C, Arnett, G, Hibbert, J, Beaupre, L.A, Zernicke, R.F, Frank, C

“…Summary Objective Total hip replacement (THR) and total knee replacement (TKR) (arthroplasty) surgery for end-stage osteoarthritis (OA) are ideal candidates…”
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Acute toxicity of vanadium to the threespine stickleback, Gasterosteus aculeatus by Gravenmier, J.J, Johnston, D.W, Arnold, W.R

“…Vanadium is widely distributed, occurring in many types of minerals, coal, and petroleum. Anthropogenic sources of vanadium originate from the production,…”
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