scholarly journals Body size-dependent energy storage causes Kleiber’s law scaling of the metabolic rate in planarians

2018 ◽  
Author(s):  
Jochen C. Rink ◽  
Albert Thommen ◽  
Steffen Werner ◽  
Olga Frank ◽  
Jenny Philipp ◽  
...  
Keyword(s):  
Life History ◽  
Body Size ◽  
Energy Storage ◽  
Energy Balance ◽  
Metabolic Rate ◽  
Scaling Law ◽  
Physiological Basis ◽  
Size Dependent ◽  
Adult Body ◽  
Kleiber’S Law

AbstractKleiber’s law, or the ¾-power law scaling of the metabolic rate with body mass, is considered one of the few quantitative laws in biology, yet its physiological basis remains unknown. Here, we report Kleiber’s law scaling in the planarian Schmidtea mediterranea. Its reversible and life history-independent changes in adult body size over 2 orders of magnitude reveal that Kleiber’s law does not emerge from the size-dependent decrease in cellular metabolic rate, but from a size-dependent increase in mass per cell. Through a combination of experiment and theoretical analysis of the organismal energy balance, we further show that the mass allometry is caused by body size dependent energy storage. Our results reveal the physiological origins of Kleiber’s law in planarians and thus have general implications for understanding a fundamental scaling law in biology.

scholarly journals Body size-dependent energy storage causes Kleiber’s law scaling of the metabolic rate in planarians

eLife ◽  
2019 ◽  
Vol 8 ◽  
Author(s):  
Albert Thommen ◽  
Steffen Werner ◽  
Olga Frank ◽  
Jenny Philipp ◽  
Oskar Knittelfelder ◽  
...  
Keyword(s):  
Body Size ◽  
Energy Storage ◽  
Metabolic Rate ◽  
Body Mass ◽  
Scaling Law ◽  
Physiological Basis ◽  
Size Dependent ◽  
Adult Body Mass ◽  
Adult Body ◽  
Kleiber’S Law

Kleiber’s law, or the 3/4 -power law scaling of the metabolic rate with body mass, is considered one of the few quantitative laws in biology, yet its physiological basis remains unknown. Here, we report Kleiber’s law scaling in the planarian Schmidtea mediterranea. Its reversible and life history-independent changes in adult body mass over 3 orders of magnitude reveal that Kleiber’s law does not emerge from the size-dependent decrease in cellular metabolic rate, but from a size-dependent increase in mass per cell. Through a combination of experiment and theoretical analysis of the organismal energy balance, we further show that the mass allometry is caused by body size dependent energy storage. Our results reveal the physiological origins of Kleiber’s law in planarians and have general implications for understanding a fundamental scaling law in biology.

scholarly journals Author response: Body size-dependent energy storage causes Kleiber’s law scaling of the metabolic rate in planarians

2018 ◽  
Author(s):  
Albert Thommen ◽  
Steffen Werner ◽  
Olga Frank ◽  
Jenny Philipp ◽  
Oskar Knittelfelder ◽  
...  
Keyword(s):  
Body Size ◽  
Energy Storage ◽  
Metabolic Rate ◽  
Author Response ◽  
Size Dependent ◽  
Kleiber’S Law

scholarly journals Do females preferentially associate with males given a better start in life?

2012 ◽  
Vol 8 (3) ◽  
pp. 362-364 ◽  
Author(s):  
Andrew T. Kahn ◽  
Julianne D. Livingston ◽  
Michael D. Jennions
Keyword(s):  
Life History ◽  
Body Size ◽  
Food Intake ◽  
Compensatory Growth ◽  
Life History Traits ◽  
Adult Life ◽  
Gambusia Holbrooki ◽  
Developmental History ◽  
Restricted Diet ◽  
Adult Body

A poor start in life owing to a restricted diet can have readily detectable detrimental consequences for many adult life-history traits. However, some costs such as smaller adult body size are potentially eliminated when individuals modify their development. For example, male mosquitofish ( Gambusia holbrooki ) that have reduced early food intake undergo compensatory growth and delay maturation so that they eventually mature at the same size as males that develop normally. But do subtle effects of a poor start persist? Specifically, does a male's developmental history affect his subsequent attractiveness to females? Females prefer to associate with larger males but, controlling for body length, we show that females spent less time in association with males that underwent compensatory growth than with males that developed normally.

Geographical variations in adult body size and reproductive life history traits in an invasive anuran, Discoglossus pictus

Zoology ◽  
2016 ◽  
Vol 119 (3) ◽  
pp. 216-223 ◽  
Author(s):  
Neus Oromi ◽  
Eudald Pujol-Buxó ◽  
Olatz San Sebastián ◽  
Gustavo A. Llorente ◽  
Mohamed Aït Hammou ◽  
...  
Keyword(s):  
Life History ◽  
Body Size ◽  
Life History Traits ◽  
Adult Body Size ◽  
Discoglossus Pictus ◽  
Geographical Variations ◽  
Adult Body ◽  
Reproductive Life ◽  
Reproductive Life History

Decrease in litter size in the shrew Crocidura suaveolens (Mammalia, Insectivora) from Corsica (France): Evolutionary response to insularity?

1997 ◽  
Vol 75 (6) ◽  
pp. 954-958 ◽  
Author(s):  
Roger Fons ◽  
Françoise Poitevin ◽  
Josette Catalan ◽  
Henri Croset
Keyword(s):  
Life History ◽  
Body Size ◽  
Litter Size ◽  
Life History Traits ◽  
Breeding Experiment ◽  
Adult Body Size ◽  
Three Generations ◽  
Evolutionary Response ◽  
Adult Body ◽  
Genetically Determined

Populations of the lesser white-toothed shrew, Crocidura suaveolens (Pallas, 1811), from Corsica show an increase in adult body size associated with a decrease in litter size. The average number of embryos in wild Corsican females is smaller (mean 2.6, n = 62) than in mainland females (mean 4.6, n = 173). A breeding experiment was run for 4 years, yielding three generations. Under standard breeding conditions, the differences between island and mainland populations were maintained and were significant (median litter size was 2 for Corsica and 5 for the mainland). These differences in life-history traits were therefore proved experimentally to be genetically determined. Hypotheses concerning the mechanisms responsible for these differences are discussed.

scholarly journals Contrasting size-dependent life history strategies of an insular lizard

2020 ◽  
Vol 66 (6) ◽  
pp. 625-633
Author(s):  
Andreu Rotger ◽  
José Manuel Igual ◽  
Giacomo Tavecchia
Keyword(s):  
Growth Rate ◽  
Life History ◽  
Body Size ◽  
Population Growth ◽  
Population Growth Rate ◽  
Body Growth ◽  
Demographic Model ◽  
Continuous Growth ◽  
Size Dependent ◽  
Selective Pressures

Abstract In many species with continuous growth, body size is an important driver of life-history tactics and its relative importance is thought to reflect the spatio-temporal variability of selective pressures. We developed a deterministic size-dependent integral projection model for 3 insular neighboring lizard populations with contrasting adult body sizes to investigate how size-related selective pressures can influence lizard life-history tactics. For each population, we broke down differences in population growth rates into contributions from size-dependent body growth, survival, and fecundity. A life table response experiment (LTRE) was used to compare the population dynamics of the 3 populations and quantify the contributions of intrinsic demographic coefficients of each population to the population growth rate (λ). Perturbation analyses revealed that the largest adults contributed the most to the population growth rate, but this was not true in the population with the smallest adults and size-independent fertility. Although we were not able to identify a single factor responsible for this difference, the combination of the demographic model on a continuous trait coupled with an LTRE analysis revealed how individuals from sister populations of the same species follow different life strategies and showed different compensatory mechanisms among survival, individual body growth, and fertility. Our results indicate that body size can play a contrasting role even in closely-related and closely-spaced populations.

scholarly journals Geographical variation in larval host-plant use by Heliconius erato (Lepidoptera: Nymphalidae) and consequences for adult life history

2002 ◽  
Vol 62 (2) ◽  
pp. 321-332 ◽  
Author(s):  
D. RODRIGUES ◽  
G. R. P. MOREIRA
Keyword(s):  
Life History ◽  
Body Size ◽  
Larval Stage ◽  
Egg Size ◽  
Geographical Variation ◽  
Size Range ◽  
Adult Size ◽  
Experimental Station ◽  
Female Body Size ◽  
Adult Body

Adult body size, one of the most important life-history components, varies strongly within and between Heliconius erato phyllis (Lepidoptera: Nymphalidae) populations. This study determines if this variation is caused by geographical changes in host-plant used by the larval stage, whose reproductive parameters are influenced by female body size, with estimates of the corresponding heritability. The variation in adult body size was determined together with a survey of passion vine species (Passifloraceae) used by the larvae in seven localities in Rio Grande do Sul State: three located in the urban area of Porto Alegre and Triunfo Counties, two within Eucalyptus plantations (Barba Negra Forest, Barra do Ribeiro County, and Águas Belas Experimental Station -- Viamão County), one in a Myrtaceae Forest (Itapuã State Park -- Itapuã County) and one in the Atlantic Rain Forest (Maquiné Experimental Station -- Maquiné County). Effects of female body size on fecundity, egg size and egg viability were determined in an outdoor insectary. Size heritability was estimated by rearing in the laboratory offspring of individuals maintained in an insectary. The data showed that adults from populations where larvae feed only upon Passiflora suberosa are smaller than those that feed on Passiflora misera. The larvae prefer P. misera even when the dominant passion vine in a given place is P. suberosa. Fecundity increases linearly with the increase in size of females, but there is no size effect on egg size or viability. Size heritability is null for the adult size range occurring in the field. Thus, the geographical variation of H. erato phyllis adult size is primarily determined by the type, corresponding availability and quality of host-plants used by the larval stage. Within the natural size range of H. erato phyllis, the variation related to this caracter is not genetically based, thus being part of H. erato phyllis phenotypic plasticity.

Sign in / Sign up

Export Citation Format

Share Document