Search Results - "Halsey, LG"

A Phylogenetic Analysis of the Allometry of Diving by Halsey, Lewis G., Butler, Patrick J., Blackburn, Tim M.

“…The oxygen store/usage hypothesis suggests that larger animals are able to dive for longer and hence deeper because oxygen storage scales isometrically with…”
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Changes in the foraging dive behaviour and energetics of king penguins through summer and autumn: a month by month analysis by Halsey, L. G., Butler, P. J., Fahlman, A., Bost, C. A., Handrich, Y.

“…King penguinsAptenodytes patagonicusare known to change their diving behaviour in response to changes in both prey location and their breeding status through…”
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Fine-scale analyses of diving energetics in king penguins Aptenodytes patagonicus: how behaviour affects costs of a foraging dive by Halsey, LG, Handrich, Y, Fahlman, A, Schmidt, A, Bost, CA, Holder, RL, Woakes, AJ, Butler, PJ

“…Heart rate data loggers were implanted into king penguins Aptenodytes patagonicus undertaking foraging trips at sea during three austral summers. Data were…”
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Oxygen uptake during post dive recovery in a diving bird Aythya fuligula: implications for optimal foraging models by Parkes, Roland, Halsey, Lewis G, Woakes, Anthony J, Holder, Roger L, Butler, Patrick J

“…The rate of oxygen uptake at the surface between dives was measured for four tufted ducks, Aythya fuligula, during bouts of foraging dives to a depth of 1.8 m…”
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To What Extent Is the Foraging Behaviour of Aquatic Birds Constrained by Their Physiology? by Green, Jonathan A., Halsey, Lewis G., Butler, Patrick J.

“…Aquatic birds have access to limited amounts of usable oxygen when they forage (dive) underwater, so the major physiological constraint to their behaviour is…”
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Experiments on single diving birds in the laboratory often measure dives of decreased effort by HALSEY, LEWIS G., BRAND, OLIVER J., WOAKES, ANTHONY J., BUTLER, PATRICK J.

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Breathing Hypoxic Gas Affects the Physiology as Well as the Diving Behaviour of Tufted Ducks by Halsey, Lewis G., Butler, Patrick J., Woakes, Anthony J.

“…We measured the effects of exposure to hypoxia (15% and 11% oxygen) and hypercapnia (up to 4.5% carbon dioxide) on rates of respiratory gas exchange both…”
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Accounting for body condition improves allometric estimates of resting metabolic rates in fasting king penguins, Aptenodytes patagonicus by FAHLMAN, A, HALSEY, L. G, HANDRICH, Y, BUTLER, P. J, JONES, D. R, SCHMIDT, A, DURAND, S, FROGET, G, BOST, C.-A, WOAKES, A. J, DUCHAMP, C

“…We describe a method that allows prediction of resting metabolic rate (RMR, ml O^sub 2^ · min^sup -1^) in adult male and female king penguins on shore by…”
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Tufted ducks Aythya fuligula do not control buoyancy during diving by Halsey, Lewis G., Wallace, Stacey E., Woakes, Anthony J., Winkler, Hans, Butler, Patrick J.

“…Work against buoyancy during submergence is a large component of the energy costs for shallow diving ducks. For penguins, buoyancy is less of a problem,…”
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