Aestivation: Molecular and Physiological Aspects - download pdf or read online

By Philip C. Withers, Christine E. Cooper (auth.), Carlos Arturo Navas, José Eduardo Carvalho (eds.)

ISBN-10: 3642024203

ISBN-13: 9783642024207

ISBN-10: 3642024211

ISBN-13: 9783642024214

Numerous animal species dwell in environments characterised via a seasonal relief within the availability of water, which frequently yet no longer continuously happens whilst temperatures are maximum. for lots of such animals, survival throughout the hardest season calls for spending lengthy classes of time in a slightly inactive country often called aestivation. yet aestivation is far greater than last inactive. winning aestivation calls for the choice of a formal microhabitat, variable levels of metabolic arrest and responsiveness to exterior stimuli, the power to experience the correct time of yr for emergence, the protection of inactive tissue, and masses extra. So, aestivation consists of a posh number of behaviors, ecological institutions and physiological changes that change throughout species of their style, importance and direction. This publication seeks to discover the phenomenon of aestivation from diversified views and degrees of association, starting from microhabitat choice to genetic regulate of physiological alterations. It brings jointly authors from the world over engaged on various systematic teams, techniques, and questions, yet who're all finally operating to raised comprehend the complicated factor of aestivation.

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Comp Biochem Physiol B 130:435–459 Hudson JW (1978) Shallow daily torpor: a thermoregulatory adaptation. In: Wang LC, Hudson JW (eds) Strategies in the Cold: Natural Torpidity and Thermogenesis. Academic, London, pp 67–108 Jackson DC (1968) Metabolic depression and oxygen depletion in the diving turtle. J Appl Physiol 24:503–509 Jackson DC (2000) Living without oxygen: lessons from the freshwater turtle. Comp Biochem Physiol A 125:299–315 Jaeger EC (1948) Does the poor-will “hibernate”? Condor 50:45–46 Jaeger EC (1949) Further observations on the hibernation of the poor-will.

In addition, the concentration of fructose-2,6-bisphosphate (F2,6P2), a strong activator of PFK, fell to <10% of control in foot muscle and the enzyme that produces F2,6P2 was inhibited during aestivation (Brooks and Storey 1990a; Storey 2002). These changes in kinetic properties are consistent with enzyme phosphorylation as also typically occurs during starvation and carbohydrate sparing in vertebrate species. Subsequent work has indicated a global involvement of RPP in the control of many aspects of metabolism during aestivation in O.

It has been estimated that as much as 30% of total body protein may be catabolized for this purpose in S. couchii (McClanahan 1967; Jones 1980). The molecular regulatory mechanisms controlling this form of protein degradation have not yet been investigated for aestivating animals. 3 Signaling Cascades and Metabolic Control in Aestivation The above discussion of reversible phosphorylation control suggests an important role for PKG in mediating various responses by metabolic enzymes during aestivation in O.

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Aestivation: Molecular and Physiological Aspects by Philip C. Withers, Christine E. Cooper (auth.), Carlos Arturo Navas, José Eduardo Carvalho (eds.)

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