... 1 caused by increased CO 2 production resulting from increased de novo lipid synthesis. Carbohydrates De novo lipogenesis Locusts Macronutrients Respiratory exchange ratio Respiratory quotient Diets in nature vary tremendously in protein:carbohydrate (p:c) ratio, but we still...

... is metabolically costly, and this cost persists for several days after thaw. Metabolic rate TCO 2 Hemolymph Respiratory quotient Spiracles CT min Insects overwintering in temperate regions may encounter temperatures low enough to freeze their body fluids. Although freezing is typically harmful...

... were the major fuels during fasting, but carbohydrate oxidation increased immediately after feeding, while protein usage predominated at later times. Stop-flow respirometry Respiratory quotient Nitrogen quotient Specific dynamic action Protein After ingestion of a meal, metabolic rate...

... the respiratory strategies used by spittlebugs, this study measured the P O 2 within the spittle of the meadow spittlebug, Philaenus spumarius , as well as the non-feeding metabolic rate (RMR) and respiratory quotient (RQ) of both nymphs and adults. The metabolic rate of nymphs feeding on xylem was also measured...

... of oxygen consumption and carbon dioxide production rate, in small aquatic organisms (2 mg wet mass). Stop-flow Hypoxia Respirometer Validation Fish Insect Respiratory quotient The development of high-precision non-dispersive infrared CO 2 analysers has made available a powerful tool...

... species Environmental stress Stress response Anticipatory mechanism Adaptive response Metabolic rate Respiratory quotient Glycogen Triglycerides Glucose Trehalose Organisms are constantly faced with environmental alterations and stresses, and environmental changes during animal...

... ), the sole living representative of an otherwise extinct marsupial order (Microbiotheria). We measured resting metabolic rate as CO 2 production( V̇ CO 2 ) and O 2 consumption( V̇ O 2 )simultaneously, together with minimum thermal conductance (C), evaporative water loss (EWL) and respiratory quotient (RQ...

... species belonging to four genera. Respiratory quotients (ratios of rates of CO 2 production to O 2 consumption) in all nine species are close to 1.0. This indicates that carbohydrate is the main fuel used for flight. Trehalase, glycogen phosphorylase and hexokinase activities are sufficient to account...

... work work loop metabolic rate respiratory quotient Cotinus mutabilis. The flight muscles of insects can be characterized as being synchronous or asynchronous, depending on the relationship between muscle electrical activity and contraction during flight (for reviews, see Dudley, 2000...

... floridensis . Fuel use in this study is characterized by the respiratory quotient, measured at intervals during a flight using modified closed-chamber respirometry. Moths were either fed twice daily to satiation with 30 % sucrose or unfed, and their fuel use was measured during flights on the first, third...

... or 15 °C. and increased with swimming speed at both temperatures and were higher at 15 °C than at 5 °C at all speeds, but the overall Q 10 values (1.23–1.48) were low in these long-term (6 weeks) acclimated fish. The respiratory quotient ( , approximately 0.85) was independent of both temperature...

... by the oxidation of proline. Measurements of the respiratory quotient (RQ) confirmed that P. sinuata uses a combination of carbohydrates and proline to power its flight. At rest and during lift-generating tethered flight, the RQ is approximately 0.9. During warm-up, the RQ is significantly lower at 0.82, which...

... W m −2 and 950 W m −2 ). In the absence of solar radiation, metabolic heat production is inversely correlated with air temperature over the measured range of 3–27 °C. The respiratory quotient varies significantly with ambient temperature, indicating that the catabolic substrate and the thermal...

...P. A. J. Hawkins; P. J. Butler; A. J. Woakes; G. W. Gabrielsen ABSTRACT The rate of oxygen consumption , respiratory quotient (RQ) and deep body temperature ( T B ) were recorded during a single, voluntary ingestion of Arctic cod Boreogadus saida (mean mass 18.9±1.1 g, S.E.M., N =13) by five...

... at 0.73–0.76 and remained in this range for most of the 5 h of fasting. Except for the first and last measurement periods, RQ was always significantly above 0.71 ( P =0.0027–0.036). While undergoing their normal nocturnal fast, the respiratory quotient of house sparrows dropped progressively...

... behavioural repertoire of these captive animals within respirometry chambers. The effect on wild animals may be more profound and requires investigation. 21 12 1990 © 1991 by Company of Biologists 1991 energy expenditure oxygen consumption respiratory quotient blood sampling mouse...