scholarly journals Specific Dynamic Action of Acetic Acid and Heat Increment of Feeding in Ruminants

1952 ◽  
Vol 5 (3) ◽  
pp. 374 ◽  
Author(s):  
GL Mcclymont
Keyword(s):  
Acetic Acid ◽  
High Heat ◽  
Specific Dynamic Action ◽  
Adequate Explanation ◽  
Dynamic Action ◽  
Heat Increment Of Feeding ◽  
Heat Increment

Attention is drawn to the lack of adequate explanation of the phenomena of the high specific dynamic action of acetic acid and the high heat increment of feeding in ruminants.

scholarly journals Juvenile salmon with high standard metabolic rates have higher energy costs but can process meals faster

2009 ◽  
Vol 276 (1664) ◽  
pp. 2103-2108 ◽  
Author(s):  
K.J. Millidine ◽  
J.D. Armstrong ◽  
N.B. Metcalfe
Keyword(s):  
Salmo Salar ◽  
Assimilation Efficiency ◽  
High Standard ◽  
Standard Metabolic Rate ◽  
Specific Dynamic Action ◽  
Total Energy Expenditure ◽  
Feeding Strategies ◽  
Energy Costs ◽  
Heat Increment Of Feeding ◽  
Heat Increment

Basal or standard metabolic rate (SMR) has been found to exhibit substantial intraspecific variation in a range of taxa, but the consequences of this variation are little understood. Here we explore how SMR is related to the energy cost of processing food, known as apparent specific dynamic action or the heat increment of feeding. Using juvenile Atlantic salmon Salmo salar , we show that fishes with a higher SMR had a higher peak and a greater total energy expenditure when digesting a given size of meal. However, the duration over which their metabolism was elevated after consuming the meal was shorter. The greater energy costs they incur for processing food may be related to their assimilation efficiency. These relationships are likely to have implications for feeding strategies and growth rates, since individuals with a higher SMR have higher routine costs of living but recover more quickly following feeding and so may have a greater potential for processing food.

scholarly journals Obesity and the Heat Increment of Feeding

Nature ◽  
1969 ◽  
Vol 223 (5202) ◽  
pp. 213-213 ◽  
Author(s):  
M. J. STOCK
Keyword(s):  
Heat Increment Of Feeding ◽  
Heat Increment

scholarly journals Heat increment of feeding in Brunnich's guillemot

1997 ◽  
Vol 200 (12) ◽  
pp. 1757-1763 ◽  
Author(s):  
P Hawkins ◽  
P Butler ◽  
A Woakes ◽  
G Gabrielsen
Keyword(s):  
Oxygen Consumption ◽  
Energetic Cost ◽  
Uria Lomvia ◽  
Deep Body Temperature ◽  
Common Murre ◽  
Heat Increment Of Feeding ◽  
Heat Increment ◽  
Rate Of Oxygen Consumption ◽  
Free Ranging ◽  
Persistent Elevation

The rate of oxygen consumption (O2), respiratory quotient (RQ) and deep body temperature (TB) 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 postabsorptive Brunnich's guillemots (thick-billed murre, Uria lomvia). The birds were resting in air within their thermoneutral zone, and the fish were refrigerated to 0-2 degreesC. The rate of oxygen consumption increased by a factor of 1.4 during the first few minutes after ingestion, but there was no significant change in TB. Mean rate of oxygen consumption returned to preingestive levels 85 min after the birds ate the fish. The telemetered temperature of one fish reached TB within 20 min. This suggests that the persistent elevation in O2 over the next hour corresponded to the obligatory component of the heat increment of feeding (HIF) and was not related to heating the fish. Abdominal temperature increases after diving bouts in free-ranging common guillemots (common murre, Uria aalge) are possibly achieved through the HIF, since meals are processed at sea. Of the increase in O2 measured in the laboratory, it is calculated that 30 % is required to heat the fish, while 70 % is due to the HIF. In free-ranging birds, the excess heat provided by the HIF could contribute 6 % of the daily energy expenditure. This suggests that the HIF augments heat production in Uria spp. and thus reduces the energetic cost of thermoregulation.

Hormonal factors in reduced postprandial heat production of exercise-trained subjects

1984 ◽  
Vol 56 (3) ◽  
pp. 772-776 ◽  
Author(s):  
J. LeBlanc ◽  
P. Diamond ◽  
J. Cote ◽  
A. Labrie
Keyword(s):  
Exercise Training ◽  
Heat Production ◽  
Human Subjects ◽  
Resting Metabolic Rate ◽  
Glucose Disposal ◽  
Plasma Norepinephrine ◽  
Trained Subjects ◽  
Enhanced Sensitivity ◽  
Heat Increment Of Feeding ◽  
Heat Increment

The influence of exercise training on postprandial heat production was investigated in human subjects. Whereas resting metabolic rate was comparable for trained and nontrained subjects, the heat increment of feeding (HIF) after subjects consumed a meal containing 755 kcal was approximately 50% smaller in the trained subjects. Measurements of respiratory quotient also indicated a reduction of about 50% in glucose oxidation associated with exercise training. The levels of plasma norepinephrine increased significantly (P less than 0.01) from 200 to 300 pg/ml in the sedentary subjects, but the changes observed in trained subjects were not significant. During the early phase of the meal, plasma levels of insulin were increased, even before nutrients appeared in the blood. Throughout the study the enhanced sensitivity to insulin of the trained subjects was confirmed. the postprandial heat production was diminished in exercise-trained subjects, and it is suggested that this could be related to a reduced activity of the sympathetic nervous system. Another possibility is that this reduction in HIF is related to a facilitation of glucose disposal in the form of glycogen rather than in the form of lipids.

Nitrogen Excretion and Protein Consumption of the Bluegill Sunfish (Lepomis macrochirus)

1971 ◽  
Vol 28 (3) ◽  
pp. 449-451 ◽  
Author(s):  
J. Savitz
Keyword(s):  
Mathematical Description ◽  
Lepomis Macrochirus ◽  
Specific Dynamic Action ◽  
Nitrogen Excretion ◽  
Bluegill Sunfish ◽  
Protein Consumption ◽  
Dynamic Action ◽  
Excretion Rates

Nitrogen excretion rates increase with an increase in protein consumption levels. A mathematical description of this relation was formulated from the data. Estimates of the effect of specific dynamic action on nitrogen excretion were also calculated.

Sign in / Sign up

Export Citation Format

Share Document