Chirp Analysis of Dosed and Control Crickets

1
Chirp Analysis of Dosed and Control Crickets

• The effect of Malthion on Crickets Chirps
• by
• Crosby Rechtin
• 12-10-97

2
Order Orthoptera

• Genus Gryllidae
• the field cricket krik it
• chirp by rapidly drawing a filelike structure
  on one fore wing over a thickened vein on the
  opposing wing
  

3
The Males Song of Function

• Among field crickets the males are the only
  gender to produce the noise.
  
• Both sexes have auditory organs on their
  forelegs.
  
• Males sing for love.
• Males sing for war.

4
Tools for analysis

• Crickets of the Genus Gryllidae - field crickets
• control crickets
• dosed crickets
• 10-3 malthion
• 10-5 malthion

• Sound recording device and capability to transfer
  sound to computer
  
• Cool Edit Pro sound analysis software

5
Chirp Analysis
6
Data Frequency Analysis

• Number of Chirps per half hour, control crickets.

7
Data Frequency Analysis

• Number of chirps per half hour, 10-3
  concentration malthion dosed crickets.

8
Data Frequency Analysis

• Number of chirps per half hour, 10-5
  concentration malthion dosed crickets.

9
Data Frequency Analysis

• Control crickets maintain more chirps per half
  hour than dosed crickets.

10
Data Frequency Analysis

• Frequency analysis of single cricket chirp of a
  control cricket.

11
Data Frequency Analysis

• Single chirp from a cricket dosed with 10-3
  malthion.

12
Data Frequency Analysis

• Single chirp from a cricket dosed with 10-5
  malthion

13
Data Spectrograph

• Minute long recording of a control cricket.

14
Data Spectrograph

• Minute long recording of a 10-3 concentration of
  malthion dosed cricket.

15
Data Spectrograph

• Minute long recording of a 10-5 concentration
  malthion dosed cricket.

16
Data Spectrograph

• Single chirp from a control cricket.

17
Data Spectrograph

• Single chirp from a 10-3 concentration malthion
  dosed cricket.

18
Data Spectrograph

• Single chirp from a 10-5 concentration malthion
  dosed cricket.

19
Data Chirp Length Analysis

• Single cricket chirp lengths, dosed and control.

20
Data Chirp Length Analysis

• Control crickets have shorter chirp lengths than
  dosed crickets.

21
Data Chirp Length Analysis

• Distance between chirp lengths, dosed and control.

22
Data Chirp Length Analysis

• Distance between chirps of control is much less
  than the difference between chirps of dosed..

23
Analysis of Data

• Malthion dosage has a definite impact on
  crickets chirp patterns.
  
• When dosed, the longer the distance between
  chirps.
  
• When dosed, the longer the chirp.
• When dosed, the less frequent a cricket chirps
  per hour.

24
Analysis of Data

• Malthion dosage has no impact on the frequency of
  a crickets chirp.
  
• There is no correlation between the frequency of
  individual cricket chirps of the control groups
  or the dosed groups.

25
Conclusion

• Malthion slows the processes between the innate
  knowledge of chirps as communication.
  
• It throws off the essential timing of crickets
  chirping displays.

26
Conclusion

• Malthion does not effect the muscular control
  which the cricket requires to chirp.
  
• The frequency and intensity of each chirp is
  unaltered.