Effects of Parental Age on Offspring from Isolated Pairs of the Mealworm Tenebrio molitor1

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Abstract
Tracey (1058) and Ludwig and Fiore (1960) found that at 25° and 20° C. larvae of the mealworm, Tenebrio molitor Linn., from young parents grew at a slower rate, required a significantly longer time to complete development, and had more molts than those from old parents. At these temperatures, an increase in parental age resulted in a decrease in the duration of adult life. Ludwig and Fiore (1960) observed that the shortening of the larval period and the reduction in the number of larval molts associated with an increase in parental age were not evident until the parents had aged at least 4 weeks, and the shortening of the adult stage until they had aged 6 weeks or longer.

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