Lecture14.Scaling

Lecture14.Scaling - LS2: Prof. George V. Lauder Lect. 14:...

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LS2: Prof. George V. Lauder Lect. 14: Scaling – analyzing the effects of size in anatomy and physiology But size is not everything … see the MythBusters elephant and mouse video: http://www.youtube.com/watch?v=wXiMs65ZAeU
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Outline Assigned reading: Custom text, green pages 383-392 Scaling and allometry: the importance of size Scaling basics The allometric equation Geometric similarity Isometric expectations 4 examples 1. Metabolic rate scaling 2. Cost of transport during swimming, flying, and running 3. Respiratory system scaling (thought preparation for next lecture!) 4. Elephants and LSD
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Size varies enormously and has a significant impact on function
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Scaling and allometry: the importance of size Scaling : how organismal structure and function changes with size Allometry : the study of size and its consequences for organismal function (These are roughly equivalent terms, often used interchangeably.)
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Scaling basics: the allometric equation Studies of scaling usually quantify changes in organismal anatomy or function with size using the allometric equation: Y = aX b where Y is the trait of interest (e.g., limb mass, metabolic rate, running speed, # mitochondria, or pretty much anything you want) a is a constant b is the exponent, the "allometric" or "scaling" coefficient X is another trait of interest (usually a measure of body size, e.g., mass or length).
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Lecture14.Scaling - LS2: Prof. George V. Lauder Lect. 14:...

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