How does starvation affect carbon dioxide output in crickets?

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Discussion Overview

The discussion revolves around the effects of starvation on carbon dioxide output in crickets, based on a lab experiment involving three groups of crickets: fully fed, starved for 48 hours, and starved for 96 hours. Participants explore the implications of the measured carbon dioxide outputs and the potential metabolic changes associated with starvation.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Experimental/applied

Main Points Raised

  • One participant reports carbon dioxide outputs of 19 μl/min for fed crickets, 22 μl/min for those starved for 48 hours, and 7.5 μl/min for those starved for 96 hours, expressing uncertainty about the lack of a clear trend.
  • Another participant suggests that the metabolic processes in crickets may resemble those in humans, where different energy sources are utilized over time, potentially indicating a metabolic switch after a period of starvation.
  • A third participant points out that with only three time points and no clear trend, conclusions are limited, proposing two interpretations: either a time effect exists with an initial decrease followed by an increase in CO2 output, or there is no effect of starvation on CO2 output.
  • A later reply corrects the earlier reported value for the 96-hour starved crickets to 7.5 μl/min and notes that the comparison between fed and 96-hour starved crickets is significant, while the comparison between fed and 48-hour starved crickets is not.

Areas of Agreement / Disagreement

Participants express differing interpretations of the data, with no consensus on the implications of the results or the existence of a clear trend. The discussion remains unresolved regarding the effects of starvation on carbon dioxide output in crickets.

Contextual Notes

Limitations include the small number of time points and the need for statistical analysis to determine the significance of the differences observed in carbon dioxide outputs.

nix
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I performed a cricket lab on three groups of crickets: fully fed, starved for 48 hrs, starved for 96 hours to see how these conditions would affect their carbon dioxide ouput..
The results attained were: 19 (Fed), 22 (48 hrs) and 17.5 (96 hrs) <--measured in μl/min of carbon dioxide
the problem with this data is that I am not sure where to start since there is no clear trend
this is what i have so far:
-19 would be the relatively normal CO2 ouput
-metabolic rate decreases when the crickets are starved
-metabolic rate affects carbon dioxide output(?) - but how and why?? :confused:

thanks for your help :smile:
 
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I know nothing about cricket biology, but in humans we have several types of metabolics depending on the source of energy. Fats in humans start to be used as a primary energy source approximately 24 hours (wild guess) after the last meal. You could argue that you are observing such switch points.
 
Unfortunately, with only 3 time points that don't show a clear trend, there isn't much you can conclude, because there are two possible interpretations (assuming 22 is even significantly different from 19...have you done any statistical analysis of the results?):

1) There is a time effect, like Monique suggested, that you get an initial decrease, then a switch in metabolism with a subsequent increase.

2) There is no effect of starvation on CO2 output.

Replication of the trend along with additional intermediate time points would be necessary before you could draw either conclusion.
 
oops!
i checked my results again and the third mean value was found to be 7.5 not 17.5!

the fed vs. 48 hrs is non-significant and the fed vs. 96hrs is significant..
 
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