Energetic strategies of shrews: ecological constraints and evolutionary implications

Genoud, Michel

doi:10.1111/j.1365-2907.1988.tb00083.x

Cited by 89 publications

(62 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although nesting aggregations are most commonly reported in rodents, social thermoregulation also is reported in marsupials (Morton 1978, Canals et al 1989, bats (Kunz 1982, Roverud and Chappell 1991, Kurta 1995, primates (Schino and Troisi 1990, Genoud et al 1997, Perret 1998) and insectivores (Dryden et al 1974, Genoud 1985, 1988, McDevitt and Andrews 1995.…”

Section: Aggregationmentioning

confidence: 99%

“…The Crocidurinae evolved in response to warm tropical climates; whereas, the elevated metabolism of the Soricinae may be an evolutionary response to maintain homeothermy in environments typified by seasonally low ambient temperatures. A departure from this trend has been noted in a New World soricine shrew, the desert shrew Notiosorex crawfordi (Coues 1877), which shows convergence with the Crocidurinae (Genoud 1988).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Social thermoregulation in least shrews, Cryptotis parva

Merritt

Zegers

2014

Mammalia

View full text Add to dashboard Cite

Abstract:Cryptotis parva exhibits a geographic range and ecological requirements unique among North American soricines: it possesses a latitudinal distribution, metabolism and communal nesting pattern more like the crocidurines of the eastern hemisphere. We utilized oxygen consumption (VO 2 ) techniques to examine metabolic shifts and video to document activity patterns and dynamics of solitary and group nesting C. parva. Between ambient temperatures of 4°C and 34°C, solitary C. parva demonstrated an inverse relationship between ambient temperature (T a ) and resting metabolic rate (RMR); thermal neutral zone (TNZ) was very narrow, between a T a of 34°C and 36°C. VO 2 was measured in groups ranging in size from one to eight at T a s of 4°C, 14°C, 24°C and 34°C. The group size had a significant effect on the median RMR and median predicted Kleiber value and was more effective at reducing metabolic cost at a lower T a . In a second experiment designed to assess the effects of huddling group size and incubator T a on the T a of the nest chamber, both had significant effects. Group size had significant effects on the T a of the nest chamber at incubator temperatures of 5°C, 10°C, 15°C and 32°C, but not at 25°C. We found no behavioral or physiologic evidence of heterothermy.

show abstract

Section: Aggregationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Social thermoregulation in least shrews, Cryptotis parva

Merritt

Zegers

2014

Mammalia

View full text Add to dashboard Cite

show abstract

“…Even animals with a skeleton, such as shrews of the genus Sorex , can exhibit a geographically varying winter size depression, known as the Dehnel phenomenon [317]. Molluscs seem be to able to reduce shell size [230].…”

Section: Shrinkingmentioning

confidence: 99%

Dynamic Energy and Mass Budgets in Biological Systems

Kooijman

2000

793

1,202

View full text Add to dashboard Cite

second editionDynamic Energy Budget theory unifies the commonalities between organisms as prescribed by the implications of energetics, which link different levels of biological organization (cells, organisms and populations). The theory presents simple mechanistic rules that describe the uptake and use of energy and nutrients and the consequences for physiological organization throughout an organism's life cycle, including the relationships between energetics and aging and the effects of toxicants. In this new edition, the theory is broadened to encompass the fluxes of both energy and mass. All living organisms are now covered in a single quantitative framework, the predictions of which are tested against a wide variety of experimental results at the various levels of biological organization. The theory explains many general observations, such as the body size scaling relationships of certain physiological traits, and provides a theoretical basis for the widely used method of indirect calorimetry. In each case, the theory is developed in elementary mathematical terms, but a more detailed discussion of the methodological aspects of mathematical modelling is also included, making the book suitable for biologists and mathematicians with a broad interest in both fundamental and applied quantitative problems in biology.Bas Kooijman is Professor of Applied Theoretical Biology at the Vrije Universiteit in Amsterdam and is also head of the University's Department of Theoretical Biology. His research focuses on mathematical biology, in particular ecotoxicology which provided the framework for the original version of his Dynamic Energy Budget theory published in 1993 (Dynamic Energy Budgets in Biological Systems -Theory and Applications in Ecotoxicology). From the first edition:"This book is an excellent scientific product that informs and forces contemplation of issues relating to population and community ecology. The author has made a complex subject coherent." Thomas G. Hallam, Bulletin of Mathematical Biology "... a very useful and general tool to select more ecologically sound process equations and parameters in ecological models." Sven Erik Jørgensen, Ecological Modelling "The author has made a significant contribution to the problem of modelling the dynamics of biological populations at the level of the individual by synthesizing this very complicated subject into a relatively short list of general assumptions and putting the energetics of sub-models for vital rates on a solid basis." Jim Cushing, Mathematical Biosciences "The family of idealized models offered in this book is capable of playing a role analogous to that of Lotka-Volterra models in population dynamics ... I am confident that any model(s) capable of occupying this niche will be strongly influenced by the ideas in this book." Roger Nisbet, Ecology 9 LIVING TOGETHER Interaction between organisms: The spectrum from competition to preypredator systems. Evaluation of the consequences of the DEB model for population dynamics, food chains, and communities....

show abstract

“…Death by starvation occurs if structure, relative to the maximum the individual once had, decreases below a minimum. This minimum fraction is for supply systems typically smaller than for demand systems, but even for demand systems, empirical support for shrinking exists (Genoud 1988). Most species seem to avoid shrinking, e.g.…”

Section: Metabolic Organization In the Standard Dynamic Energy Budgetmentioning

confidence: 99%

Dynamic energy budget theory restores coherence in biology

Sousa¹,

Domingos²,

Poggiale

et al. 2010

Phil. Trans. R. Soc. B

218

185

View full text Add to dashboard Cite

We present the state of the art of the development of dynamic energy budget theory, and its expected developments in the near future within the molecular, physiological and ecological domains. The degree of formalization in the set-up of the theory, with its roots in chemistry, physics, thermodynamics, evolution and the consistent application of Occam's razor, is discussed. We place the various contributions in the theme issue within this theoretical setting, and sketch the scope of actual and potential applications.Keywords: dynamic energy budget theory; biology; metabolism; ecology; evolution; energetics REACHING OUT FOR GENERALITYIn physics, there is a quest for a unified theory. Physical theories have a broad spectrum of application, a strong mathematical background and are subject to numerous empirical tests. By contrast, in biology, mathematical theory has played a secondary role because biology is frequently seen as a science of exceptions and particular cases, with little interest in abstraction and generalization. Exceptions are the research being done in the fields of theoretical biology and mathematical biology. However, theoretical and mathematical biology have frequently been carried out without a concern for empirical testing. When this concern appears, models are of narrow application, reducing their theoretical breadth. The dynamic energy budget (DEB) theory starts from the Dutch tradition of theoretical and mathematical biology, but couples it with a fundamental concern in producing general theory that is subjected to careful empirical testing.DEB theory aims to capture the quantitative aspects of metabolism at the individual level for organisms of all species. It builds on the premise that the mechanisms that are responsible for the organization of metabolism are not species-specific (Kooijman 2001(Kooijman , 2010. This hope for generality is supported by (i) the universality of physics and evolution and (ii) the existence of widespread biological empirical patterns among organisms . Table 1 synthesizes the essential criteria for any general model for the metabolism of individuals. We explore the links between DEB theory and each of the proposed criteria in the following paragraphs. DEB theory is explicitly based on the conservation of mass, isotopes, energy and time, including the inherent degradation of energy associated with all processes. So it complies to criteria 1, table 1.The DEB theory is biologically implicit, so it applies to all species. Species-specific restrictions of DEB models are explained and predicted by the theory (criterion 5, table 1). For example, consider the most important difference between DEB models, the number of reserves (biomass components that fuel metabolism) and structures (biomass components that have maintenance needs) that are delineated. This depends on the degree of coupling of the various substrates an organism needs. Animals feed on other organisms, which couples uptake of the various substrates (proteins, carbohydrates, lipids, nutrients) tightly and ex...

show abstract

Energetic strategies of shrews: ecological constraints and evolutionary implications

Cited by 89 publications

References 92 publications

Social thermoregulation in least shrews, Cryptotis parva

Social thermoregulation in least shrews, Cryptotis parva

Dynamic Energy and Mass Budgets in Biological Systems

Dynamic energy budget theory restores coherence in biology

Contact Info

Product

Resources

About