Pupation of mature larvae of several species of tenebrionid beetles is inhibited by crowding. The magnitude of the inhibition varies according to species. The primary factor causing this inhibition is the mechanical stimulation resulting from inter‐larval contacts. Cannibalism of prepupae, pupae and teneral adults is discussed as the probable chief factor responsible for the evolution of the inhibitory effect of crowding.
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Tschinkel et al. (1971) studied this question.
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