Effect of artificially reproduced sounds on living organisms － Effect of the two kinds of BGM love song on courtship and/or mating behavior in a cricket, Teleogryllus emma －

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  • 人工再生音が生体へ及ぼす影響 －2種の求愛歌BGMがエンマコオロギの求愛・交尾行動へ与える効果－
  • ジンコウ サイセイオン ガ セイタイ エ オヨボス エイキョウ 2シュ ノ キュウアイカ BGM ガ エンマコオロギ ノ キュウアイ コウビ コウドウ エ アタエル コウカ

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Influence of the two kinds of BGM love song, recorded in analog format and that in digital, on courtship and/or mating behavior of a cricket, Teleogryllus emma, was investigated to elucidate whether or not the sound recorded in digital format may have some harmful effects. The courtship and/or mating behavior were observed for 20 min. after putting a female and a male cricket in a pair state. Present observations have revealed that with BGM love song in analog sound, about 40% of the studied females commenced their mating behavior, 'Senori-kodo" (mounting on the male partner) immediately after hearing the love song of their male partners, whereas in digital sound, only about 4% of the females showed such a behavior; and that about 30% of the males studied in analog sound skipped singing their love song prior to beginning their courtship, which is 3. 5 times higher than that of observed in digital sound. However, there exists no essential difference in the overall success rates of courtship and/or mating behavior in between the two BGM love song series, in digital and in analog sound; about 92% success rate in digital sound versus about 93% in analog. Both rates are about 10% higher than that with no BGM. These findings indicate that the BGM love song in digital sound does not seem to have any harmful effects, and that BGM love song in analog sound seems to have some stimulating effect upon the early step of courtship and/or mating behavior of Teleogryllus emma. This possibly suggests that the sound recorded in analog format may be accepted more favorably as compared with that in digital format.

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