BIOD43H3 Lecture Notes - Lecture 2: Allometry, Fossorial, Approximation Error
Today we answered questions regarding the article that was provided which can be found in
the tutorial folder on blackboard.
Relative because also considering length of the animal. Important as he divided running
speed and length.
1) According to geometric similarity principle body length scales with mass proportion to
mb -.033
a) Relative running velocity scale as → Mb -0.27 + Mb -0.33 = Mb -.60
b) Just considering stress scope you're not considering length of animal. To get
number for comparison must consider relationship that has already been
reported.
c) For larger mammals must include both, for smaller mammals it’s mass or
length.
2) If there's no difference in measuring big and small animals, for small animals the
precision with which you can measure variation in speed i in speed increases with
increasing speed
a) For RELATIVE velocity in smaller animals, the error will be higher and less
precise.
i) Larger animals have lower error due to significance of the size.
b) Since larger animals tend to run at greater absolute velocities, relative error
would be less in these groups than in smaller animals.
3) Arboreal species and fossorial species are specialized and if they were included
they would be outliers and skew that data.
a) They have different morphology, and have adapted to different environments.
i) Can’t include an animal that can’t run as you can’t compare them in
the relationship that is being analyzed.
4) Author compared 2 slopes, used the length from reported data and compared it to
the length he had using an allometric scaling equation. He found that there was no
significant difference between the calculated and reported length and thus there was
no bias.
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