ヤマトゴキブリの発育に及ぼす日長の効果

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書誌事項

タイトル別名
  • The effect of photoperiod on growth in the Japanese cockroach, Periplaneta japonica (Karny)
  • ヤマトゴキブリ ノ ハツイク ニ オヨボス ヒナガ ノ コウカ

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抄録

In order to clarify the effect of photoperiod on growth in the Japanese cockroach, Periplaneta japonica (Karny), an experiment was carried out under different photoperiods at 20℃ and 25℃. In the short photoperiod (LD 8 : 16hr or LD 12 : 12hr), the development in the younger nymphal stages was retarded. In the photoperiod of 13hrs or longer, the ratio of adult emergence was the highest at LD 16 : 8hr. But the development of some of nymphs was retarded in the middle or older nymphal stages. When nymphs in prolonged 3rd or 4th nymphal stage were transferred from LD 8 : 16hr to LD 16 : 8hr photoperiodic shifts, they began to emerge again within two weeks. On the contrary, when 5th nymphs were transferred from long-day to short-day, the development in 8th or 9th (final) instar was retarded. Moreover, when some of them were transferred to long-day again, the adult emergence was accelerated and more synchronized. When the final or extra instar nymphs were transferred from outdoor conditions to experimental conditions during the winter months, the twice-overwintering nymphs required longer time for adult emergence in LD 13 : 11hr than LD 14 : 10hr at the beginning of winter especially. Contrarily, there was no significant difference in the once-overwintering nymphs between LD 13 : 11hr and LD 14 : 10hr. It was suggested that there was a difference in intensity of diapause between twice-overwintering nymphs and one-overwintering ones. On the other hand, it seemed that photoperiod did not affect the stage of the embryonic development.

収録刊行物

  • 衛生動物

    衛生動物 51 (3), 195-204, 2000-09-15

    日本衛生動物学会

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