Name: way bumble bees do, through transferring heat

Name: Sonia
Sanders

Student
Number: 0615182

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BIOL1030H-W

Assignment
Number: 3

Word Count:
400

Thermoregulation
in Bees

Background: Since honey bees are
endotherms, they create their own heat through metabolic processes so they can
fly.  This involves burning glucose to
create heat and maintaining that heat so the honey bee can fly.  Researchers understand how bumble bees create
heat while flying, there is heat traveling from the thorax to the abdomen,
however, this is not the same process in honey bees. 

Purpose: To perform two different
experiments to find out how honey bees fly and regulate their body temperature
at the same time.  One experiment will
compare the thorax and abdomen temperatures to the air temperature and the
other experiment will compare metabolism rate and wing-beat frequency to the
air temperature.

Experiment 1

Hypothesis: Honey bees regulate
their body temperature the same way bumble bees do, through transferring heat
from the thorax to abdomen to fly.

Method: First, the temperature of
the thorax is taken in comparison to the air temperature. Then, the temperature
of the abdomen is taken to compare it to the temperature in the air.  The data inputted will create a line of best
fit to explain what is happening to the honey bee.

Results: The thorax temperature
slowly increases as the air temperature is increased.  The abdomen temperature steadily rises as the
temperature in the air becomes warmer.

Conclusion: Reject the hypothesis. Since
the abdominal temperature was very similar to air temperature, the thorax does
not transfer heat to the abdomen.  Since
the thorax temperature did not change very much, it is endothermic, meaning it
produces its own heat for survival.  In
conclusion, honey bees do not thermoregulate the same way bumble bees do.

Experiment 2

Hypothesis: The honey bee will thermoregulate
the thorax temperature by not beating its wings as much as it normally
would.  This would reduce the metabolism
of the honey bee.

Method: The metabolic rate is
compared to the temperature in the air, the temperatures range from 20-40
degrees Celsius. The wing-beat frequency is compared to the air temperature
with the same range as before.

Results: The metabolic rate slowly
decreased as the air temperature increased. 
The wing-beat frequency sharply decreases as the air temperature
decreases.

Conclusion: Reject the hypothesis.  The wings beat faster when it is cooler rather
than warmer.  In conclusion, the honey
bee will thermoregulate better in cooler temperatures since it can fly better
due to increased metabolic rates making the bee warm.

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