Abstract
The effects of photoperiod, insemination, and age on the calling and mating activities of Trogoderma granarium females were investigated. Among mature virgin females held on 10:14, 12:12, or 16:8 LD, some calling behaviour was observed throughout photophase but 75% or more females were active for a period lasting about 8 hr/day. Under all three light regimes, this period was centred around the middle of photophase when virtually 100% of females assumed the calling posture. Correlated with diurnal fluctuations in female calling, mating frequency was higher towards the middle as compared to the start of photophase. In contrast to virgins, only about 3% of recently mated females engaged in calling activity. Significant increases in both calling and female receptivity to mating occurred between the 1st and 3rd days of adult life, but the daily calling pattern of virgin females remained stable between the 4th and 10th days.
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