Question

There were 770 frogs in a pond. 70 of them died within a month. Calculate the death rate of the population of frogs in the pond.

Hint:

Always include the per capita unit in rate calculation questions in ecology.

Answer 1

Step 1: Write the formula for death rate.
Death rate of a population is calculated using the formula:
\[ \text{Death Rate} = \frac{\text{Number of deaths}}{\text{Total population}} \times 100 \]
This formula gives the percentage of individuals that died in the population during a given time period.

Step 2: Substitute the given values.
Total number of frogs in the pond = 770
Number of frogs that died = 70

Substitute these values into the formula:
\[ \text{Death Rate} = \frac{70}{770} \times 100 \]

Step 3: Simplify the calculation.
\[ \frac{70}{770} = \frac{1}{11} \] \[ \frac{1}{11} \times 100 = 9.09 \]
Thus, the death rate is approximately 9.09%.

Final Answer:
The death rate of the frog population in the pond is approximately 9.09%.