Get Activity Patterns in Small Mammals: An Ecological Approach PDF

By Stefan Halle, Nils Chr. Stenseth (auth.), Prof. Dr. Stefan Halle, Prof. Dr. Nils Christian Stenseth (eds.)

ISBN-10: 354059244X

ISBN-13: 9783540592440

ISBN-10: 364218264X

ISBN-13: 9783642182648

Environmental stipulations swap significantly during 24 h with recognize to abiotic components and intra- and interspecific interactions. those alterations lead to restricted time home windows of chance for animal actions and, for this reason, the query of whilst to do what's topic to health maximisation.
This quantity offers a present evaluation of theoretical concerns and empirical findings of job styles in small mammals, a bunch during which the full of life and ecological constraints are really serious and the variety of task styles is very excessive. Following a comparative ecological process, for the 1st time job timing is as a result taken care of when it comes to behavioural and evolutionary ecology, offering the conceptual framework for chronoecology as a brand new subdiscipline inside of behavioural ecology. an in depth Appendix supplies an advent to equipment of job modelling and to instruments for statistical development analysis.

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Bartness and H. Elliott Albers fied clearly. Thus, temperature compensation may be an important, but not ubiquitous, trait of circadian clocks in mammals. 3 Physiological Influences on the Circadian Clock In addition to environmental factors, several physiological variables can influence the speed at which the clock runs. Gonadal hormones can produce changes in the free-running period in both male and female rodents. Reductions in circulating concentrations of testosterone produced by castration shortens the free-running period and administration of testosterone to castrated mice lengthens the period (Daan et al.

12-24) phases. --=:----+ vertical axis. Light provided around the Rest Phase Active Phase beginning of the daily active phase resets o TiIme W"Ithln C·Ircadlan 12. C I (h) 24 the clock in the delay direction. Light proyc e rs . vlded apprOJumately 6 h after the onset of the active phase resets the clock in the advance direction. Light provided at other times in the circadian cycle has little or no effect on the clock. (Adapted from Albers et aI. 2 Food Availability The first evidence that scheduled availability of food influences circadian control came from studies showing that locomotor activity was increased markedly before the time that food was presented each day in rats (Richter 1922).

Can J Zool 68:619-640 Maynard-Smith I (1982) Evolution and the theory of games. Cambridge University Press, Cambridge McNamara 1M (1992) Risk-sensitive foraging: a review of the theory. I Math Bioi 54:355-378 Park 0 (1940) Nocturnalism - The development of a problem. Ecol Monogr 10:485-536 Pearson AM (1962) Activity patterns, energy metabolism, and growth rate of the voles Clethrionomys rufocanus and C. glareolus in Finland. Ann Zoo I Soc Vanamo 24:1-58 Rusak B (1989) The mammalian circadian system: models and physiology.

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Activity Patterns in Small Mammals: An Ecological Approach by Stefan Halle, Nils Chr. Stenseth (auth.), Prof. Dr. Stefan Halle, Prof. Dr. Nils Christian Stenseth (eds.)


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