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Allometric cascade as a unifying principle of body mass effects on metabolism
The power function of basal metabolic rate scaling is expressed as aMb, where a corresponds to a scaling constant (intercept), M is body mass, and b is the scaling exponent. The 3/4 power law (theExpand
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Fuel selection in rufous hummingbirds: ecological implications of metabolic biochemistry.
Hummingbirds in flight display the highest rates of aerobic metabolism known among vertebrates. Their flight muscles possess sufficient maximal activities of hexokinase and carnitineExpand
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Allometric cascade: a model for resolving body mass effects on metabolism.
Expanding upon a preliminary communication (Nature 417 (2002) 166), we here further develop a "multiple-causes model" of allometry, where the exponent b is the sum of the influences of multipleExpand
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Effects of exercise-training on cardiac performance and muscle enzymes in rainbow trout,Oncorhynchus mykiss
Rainbow trout,Oncorhynchus mykiss, were exercise-trained for 18 hours per day over 28 days at water velocities up to 60% of their measured Ucrit. Anin situ perfused heart preparation was used toExpand
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Mitochondrial respiration in hummingbird flight muscles.
Respiration rates of muscle mitochondria in flying hummingbirds range from 7 to 10 ml of O2 per cm3 of mitochondria per min, which is about 2 times higher than the range obtained in the locomotoryExpand
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IN VIVO UTILIZATION OF GLUCOSE BY HEART AND LOCOMOTORY MUSCLES OF EXERCISING RAINBOW TROUT (ONCORHYNCHUS MYKISS)
In vivo rates of glucose utilization were estimated in red muscle and heart of rainbow trout using the radiolabeled glucose analogue, [14C]-2-deoxyglucose ([14C]-2-DG). The 2-DG ‘lumped constant’Expand
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Hummingbirds Fuel Hovering Flight with Newly Ingested Sugar
We sought to characterize the ability of hummingbirds to fuel their energetically expensive hovering flight using dietary sugar by a combination of respirometry and stable carbon isotope techniques.Expand
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Allometric scaling of flight energetics in Panamanian orchid bees: a comparative phylogenetic approach
SUMMARY The relationship between body size and flight energetics was studied in the clade of tropical orchid bees, in order to investigate energy metabolism and evolution. Body mass, which variedExpand
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Gluconeogenesis in teleost fishes
The literature on the substrates, enzymes, pathway, regulation, and physiological function of gluconeogenesis in teleost fishes is reviewed. The information presently available reveals considerableExpand
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Oxidative properties of carp red and white muscle.
Substrate preferences of isolated mitochondria and maximal enzyme activities were used to assess the oxidative capacities of red muscle (RM) and white muscle (WM) of carp (Cyprinus carpio). A 14-foldExpand
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