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Relevant summary of Chapter 1 to 3 of Schmidt-Nielsen's Scaling: Why is Animal Size So Important? $3.21   Add to cart
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Relevant summary of Chapter 1 to 3 of Schmidt-Nielsen's Scaling: Why is Animal Size So Important?
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  • Course
  • BBS2062 Allometry
  • Institution
  • Maastricht University (UM)
  • Book
  • Scaling

For one case study, this is a short summary to all the relevant points of Chapters 1 to 3 of Knut Schmidt-Nielsen's Scaling: Why is Animal Size so Important?

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  • No
  • Chapter 1 to 3
  • March 7, 2023
  • 2
  • 2022/2023
  • Summary

Subjects

  • scaling
  • allometry
  • schmidt
  • schmidt nielsen
  • why is animal size so important

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  • Maastricht University (UM)
  • Biomedical Sciences
  • BBS2062 Allometry
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Content preview

What limits the size of animals? (Chapter 1)

Ability to support static load – bone diameter, compressive strength

Availability of food that is of high energy value and rapidly digested

We see in Chapter 2:

- Dimensions
- Material
- Design

- Not Oxygen (does not seem to constrain body size because tracheas in insects can support
larger size, but we do not see larger size insects)

We see in Chapter 3:

- Speed

Chapter 2

Scaling deals with the structural and functional consequences of changes in size or scale among
otherwise similar organisms.

- Tension – all forces are pulling away from the object
- Compression – forces acting on the material push towards the body

Two measurements: mass and linear dimension

Mass is an important consideration for:

- Strength of supporting structures (skeletons)
- Demands on the muscular system in locomotion
- Need for food

Convection is fluid flow that occurs due to effects of material property heterogeneity and body forces on
a fluid (gas or liquid), most commonly density (incl heat) and gravity

Oxygen – mass transport by convection, hemoglobin and circulation (mammals), diffusion in gas
(tracheae in insects). Oxygen transportation does not seem to constrain body size. Tracheas in insects
can support larger sizes, but we do not see larger sizes



Isometric = geometrically similar = well-defined concept of geometric similarity

As the volume of a body is increased, its surface does not increase in the same proportion = rather, in
proportion to the two-thirds power of the volume

- (relative) Surface area per unit volume decreases with increasing volume

23 cube = surface area is 24, volume is 8. 24/8 = 3

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