BIOD43H3 Lecture Notes - Lecture 3: Cellular Respiration
Discussing the graphs from the 3rd paper:
For the graphs regarding the speed relative to body mass, there is a steady increasing trend,
where heavier animals have higher speeds. The opposite was true for stride frequencies,
where larger animals have lower stride frequencies.
With regards to the mass-specific energy consumption relative to mass of the animal. The
cost per stride are the same regardless of the mass of the animal → First time they normalize
this.
Assigned questions answered in Tutorial (can be found in the tutorial folder):
1) Other characteristic that are different other than body size that can vary b/n
individuals these characteristic can be such as anatomical and morphological
differences.
a) Take less strides to cover the same distance if your bones are longer than
another individual
b) Depending on the habitat of an animal can affect the speed or distance they
cover over 1 stride (IE a rabbit).
2) Chipmunks are either standing, slow walking or galloping or bounding. They can trot
but their range of speed for them to be trotting is very small. These range for walking
to trotting in these mammals are very small → Difficult to see and measure.
a) As they used high speed cameras they cannot perceive the range of speed
for trotting.
3) Not just the adaptation of animal, but because you’re working at maximum speed,
you’re likely using anaerobic metabolism. As mentioned in the article, the value for
determining the energy cost is for consumption of O2 → Thus for the cost it wouldn’t
be right as some species use anaerobic
a) Effect isn’t on tendency, but the problem is that if they considered as they did
the cost cannot be concluded be by aerobic metabolism.
b) Unable to calculate cost of each component of aerobic and anaerobic
metabolism.
c) All animals are capable of short burst of high galloping speeds that relies on
anaero
4) They didn't find a very big change in frequency strides where they increased the
speed if there isn’t a important relationship between the 2 variables. There is no
significance.
a) There isn’t a clear relationship between speed and frequency stride, thus the
chance of an error would be lower
b) The length of the strides would be wrong to include → Based on the distance
covered per stride.
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Document Summary
For the graphs regarding the speed relative to body mass, there is a steady increasing trend, where heavier animals have higher speeds. The opposite was true for stride frequencies, where larger animals have lower stride frequencies. With regards to the mass-specific energy consumption relative to mass of the animal. The cost per stride are the same regardless of the mass of the animal first time they normalize this. They can trot but their range of speed for them to be trotting is very small.
