Comparison of Mucor M41 with Geotrichum

The five runs for each organism are based on the two stochastic models (links below). A tip length for each organism was assumed to be 10 units. A "tip" is the length of the organism occurring at the end of each hypha (including branches) AFTER a change in direction of the hypha.

Measurements of this length were taken for the three colonies of Geotrichum but not for Mucor M41, which was measured in 1994 before the significance of this distance was considered.

Measurements of angles and distances for Mucor M41 in 1994 were all recorded to the nearest five (degrees or units). Although exact data is available for Geotrichum, the model for these runs is also based on data to the nearest five so that a direct comparison is possible.

All output is for generation 150.

L system for Geotrichum	L system for MucorM41
assumeT/run01/geof1.midi	assumeT/run01/m41f1.midi
Text file: output from Lsystem for this run.	Text file: output from Lsystem for this run.


assumeT/run02/geof1.midi	assumeT/run02/m41f1.midi
Text file: output from Lsystem for this run.	Text file: output from Lsystem for this run.


assumeT/run03/geof1.midi	assumeT/run03/m41f1.midi
Text file: output from Lsystem for this run.	Text file: output from Lsystem for this run.


assumeT/run04/geof1.midi	assumeT/run04/m41f1.midi
Text file: output from Lsystem for this run.	Text file: output from Lsystem for this run.


assumeT/run05/geof1.midi	assumeT/run05/m41f1.midi
Text file: output from Lsystem for this run.	Text file: output from Lsystem for this run.


All runs were converted to sound within the specified pitch midi range of 25 to 95 and all start at 60 (middle C).	java SpecifyRange minimum pitch: 25 maximum pitch: 95 start pitch: 60

Observations

Geotrichum is denser than Mucor M41: the sound pieces are longer. The range of interbranch distances for Mucor M41 is five to 300 units: that for Geotrichum is zero to 65.
Mucor M41 achieves circularity faster than Geotrichum despite Geotrichum having greater hyphal mass. The range of branching angles for Mucor M41 is 70 to 120: that for Geotrichum is 30 to 95.
The organism in the run assumeT/run04/m41f1.midi produces a highly tuneful fragment at the beginning of its sound piece.

last updated February 2004

Author: F.Soddell@latrobe.edu.au