Not all fertilized eggs hatch out.
The hatching rate is
calculated by counting the number of hatched larvae out of the fertilized eggs incubated under the same conditions.
Hatching rate (%) =
number of larvae hatched / number of fertilized eggs x 100
Eggs are very fragile. They
can be easily damaged or even die from the shock that occurs when transferred
to a housing container.
Therefore, only the number of live fertilized eggs is used as the denominator for the calculation of the hatching rate.
rate, hatching rate, and survival rate of hatched larvae are the criteria used to
determine the quality of the eggs.