ヒメエグリバ成虫の配偶,摂食および飛翔行動について

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タイトル別名
  • Mating Feeding and Flight Behaviors of the Fruit Sucking Moth, Oraesia emarginata Fabricius(Lepidoptera: Noctuidae).
  • ヒメエグリバ成虫の配偶，摂食および飛しょう行動について
  • ヒメエグリバ セイチュウ ノ ハイグウ セッショク オヨビ ヒショウ コウドウ

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The mating, feeding and flight behaviors of Oraesia emarginata FABRICIUS were observed under the artificial conditions of 15L-9D photoperiod and 23-24°C. Most male and female moths mated first from 2 to 5 days after emergence. Before mating, females took the calling position at 5.3h after light off. Mating started from 6.3h and peaked at 7 to 8h after light off. The mean uninterrupted mating time was 66min. On the day mating took place, 10% to 20% of both male and female moths sucked fruit juice within 2h after light off, and then the number of sucking adults decreased until mating. After mating, females did not take food, but many male moths fed again. During observations on following days, re-mating couples were excluded to verify differences in behavior between days when mating occurred and when it did not. After the mating day, most mated females laid eggs and 5% to 10% of them sucked fruit juice continuously throughout the dark period. On the other hand, mated males mainly fed soon after light off. They usually fed once during the dark period and the mean feeding time was less than 20min. Flights showed two peaks during the dark period. These peaks occurred not only on the mating day, but also on the following several days. The first smaller peak occurred 1 to 2h after light off. This was thought to be flight for orientation to the feeding habitat. The second larger peak appeared from 5.6 to 7h after light off and may be due to increased mating activity.

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