During mating, the male swims under the female and grasps her with his antennae. He holds on for either several minutes or several days and then they separate. Inside the female's body the eggs are wrapped in yolk and a strong shell which has spikes or bumps on them. The eggs are put into the water and then sink to the bottom on the water, where they start developing. Females can produce two types of eggs, thin shelled "summer" eggs and thick shelled "winter" eggs. The type of egg produced is determined by the number of males. Summer eggs will be produced if there is a shortage of males in the population. Summer eggs hatch rapidly. The young from these eggs will populate the pool during the same season they are laid. The winter eggs remain in the mud at the base of the pool and dry out with the pool. The eggs will hatch in the spring when the pools refill.
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