Scaling of metabolic rate

The scaling exponent for the volume of alveolar macrophages is significantly higher than zero Table 1and this trend may be because alveolar macrophages phagocytose microbes, particles, and even erythrocytes. Gravity and the evolution of cardiopulmonary morphology in snakes.

Ginzburg L, Damuth J.

Scaling of number, size, and metabolic rate of cells with body size in mammals

Testing for phylogenetic signal in comparative data: A unifying explanation for diverse metabolic scaling in animals and plants. Freckleton RP, Jetz W. Constraints on reproduction by flying vertebrates: Most of the scaling relationships were calculated using conventional least-squares regression LSR.

Behav Ecol Sociobiol Effects of metabolic level on the body size scaling of metabolic rate in birds and mammals.

Elgar and Harvey [ 23 ] also found variability among groups of species but reasoned that standard metabolic rates vary taxonomically rather than with temperature regulation, food intake or activity.

Energy metabolism as related to body size and respiratory surfaces, and its evolution.

Scaling metabolic rate fluctuations

The global diversity of birds in space and time. These finer parts of the network would not be area-preserving but area-increasing: Examples include lifespans, growth rates, densities of trees in forests, and numbers of species in ecosystems see e.

They also stated that the overall exponent, the b term in the Kleiber equation, is a weighted average of all the individual b i values, the weighting being determined by the relevant control coefficients. In a running quadruped the limbs support bending rather than buckling loads but the vertebral column receives an end thrust that generates a buckling load.

Riddles in a mosaic. It emphasises that standard metabolic rate is determined by energy demand, not supply; and it predicts an exponent for maximal metabolic rate in mammals between 0. The most striking conclusion is b.

The first issue is disagreement as to whether any consistent relationship obtains between standard metabolic rate and body mass.

Metabolic theory of ecology

Determinants of the postfeeding metabolic response of Burmese pythons, Python molurus. Accessed July 13, Why logarithmic transformation is necessary in allometry. After adding these and other complications, they found that the model also predicted three-quarter-power scaling in mammals.

Hayssen V, Lacy RC. This evidence alone must make us more sceptical of there being some unifying law involved that demands that b holds close to 0. For example, researchers analyzed patterns of diversity of New World coral snakes to see whether the geographical distribution of species fit within the predictions of MTE i.

Animals were held for 1 and 2 days before VO 2 measurements and then fasted for 6—12 h. While different underlying mechanisms [1] [8] make somewhat different predictions, the following provides an example of some of the implications of the metabolism of individuals.

Metabolic rate

1. We present a statistical analysis of the scaling of resting (basal) metabolic rate, BMR, with body mass, Bm and body temperature, Tb, in mammals. 2. Whilst the majority of the variance in ln.

Metabolic rate, the rate at which organisms take up, transform, and expend energy developing a metabolic theory of ecology.

Scaling of number, size, and metabolic rate of cells with body size in mammals

Metabolism is a uniquely biological process, but it obeys the phys- metabolic scaling relations that, on the one hand, can be explained in. Jan 12,  · The scientists were delighted to see that the model gave rise to three-quarter-power scaling between metabolic rate and body mass. But the system worked only for plants.

Dec 01,  · A 4-species animal model suitable for experimental study of the effect of change in gravitational loading on the scale relationship between metabolic rate and total body mass is used to study the effect of temperature on metabolic rate in six male animals, months of age, of each of the four species in the ambient temperature range C.

A species-level model for metabolic scaling of trees II. Testing in a ring- and diffuse-porous species Erica I. von Allmen1, John S.

Sperry*,1, rate by mass scaling: G / Q / Mb, where the metabolic exponent b = c·q. In this paper, we test the species model by obtaining its. Scaling of metabolic rate with surface-to-mass ratio. Several workers accept the reality of allometric scaling but question the value b =which a consensus of physiologists has .

Scaling of metabolic rate
Rated 0/5 based on 45 review
Metabolic rate (article) | Khan Academy