By Philip C. Withers, Christine E. Cooper (auth.), Carlos Arturo Navas, José Eduardo Carvalho (eds.)
Numerous animal species reside in environments characterised by way of a seasonal relief within the availability of water, which regularly yet no longer continually happens whilst temperatures are maximum. for plenty of such animals, survival through the hardest season calls for spending lengthy sessions of time in a slightly inactive country referred to as aestivation. yet aestivation is far greater than closing inactive. profitable aestivation calls for the choice of a formal microhabitat, variable levels of metabolic arrest and responsiveness to exterior stimuli, the power to feel the correct time of 12 months for emergence, the upkeep of inactive tissue, and masses extra. So, aestivation contains a posh choice of behaviors, ecological institutions and physiological changes that fluctuate throughout species of their style, value and direction. This e-book seeks to discover the phenomenon of aestivation from diverse views and degrees of association, starting from microhabitat choice to genetic regulate of physiological alterations. It brings jointly authors from internationally engaged on varied systematic teams, ways, and questions, yet who're all eventually operating to raised comprehend the advanced factor of aestivation.
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Additional resources for Aestivation: Molecular and Physiological Aspects
4 Protein Degradation Given that rates of protein synthesis are strongly suppressed during aestivation, rates of protein degradation must also be suppressed, presumably by a similar amount, so that the amounts of most cellular enzymes/proteins are stabilized over what could be many weeks or months of hypometabolism. Reduced rates of protein degradation have been reported in several hypometabolic systems (summarized in Storey and Storey 2004) and this is also true of aestivation. In O. lactea, activity of the 20S proteasome in hepatopancreas decreased by 60–80% after 2 days of aestivation, although Western blotting showed that the content of selected subunits of the proteasome did not change (Ramnanan et al.
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Aestivation: Molecular and Physiological Aspects by Philip C. Withers, Christine E. Cooper (auth.), Carlos Arturo Navas, José Eduardo Carvalho (eds.)