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42nd LectureWed 29 April 2009

Vertebrate PhysiologyECOL 437 (MCB/VetSci 437)Univ. of Arizona, spring 2009

Kevin Bonine & Kevin Oh

Hibernation(Physiology and the Environment)Chapter 10

Scheduling...

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Thermal Physiologycon’t

Body Size Influences

1. Physiological Abilities2. Behavioral Choices

How and Why?

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Bear Hypothermy (~5°C below ‘normal’)

Seasonal Changes in Morphology & Physiology

Reindeer

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Arctic Ground Squirrel

SuperCooling

Arctic Ground Squirrel

Permafrost&Arctic Ground Squirrel

Arctic Ground Squirrel

Recall TNZ

Energy Savings from Hibernation

MUFAsPUFAs&SFAs

Role of Diet in Hibernation

Group Think?

END

Shortening Lifespan in the U.S.

Miller, 2003 (see figure 11-12 in Miller 2005)

Sivaji