Female sex pheromone of the Ayu, Plecoglossus altivelis, involved in courtship behaviour.

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  • HONDA Haruo
    Central Research Institute of Electric Power Industry

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Other Title
  • アユの雌性フェロモンと求愛行動
  • アユの雌性フェロモンと求愛行動〔英文〕
  • アユ ノ シセイ フェロモン ト キュウアイ コウドウ エイブン

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Abstract

This report deals with the courtship behaviour and the presence of a female sex pheromone of the Ayu, Plecoglossus altivelis. Increased ventilatory frequencies and fin display reactions in the male Ayu were elicited by the water sample inclusive of post-ovulatory females. It was noticed that the males were able to discriminate post-ovulatory females from pre-ovulatory females without actually sighting the female.<br> Some highlighted aspects derived from these experiments are listed as follows;<br> 1. Post-owlatory females released a female sex pheromone, which males detect by olfaction.<br> 2. The female sex pheromone, produced in the ovaries of post-ovulatory females, is secreted through the urogenital papilla.<br> 3. The female sex pheromone was found to be a water-ether soluble basic substance, having an Rf value of 0.43 on the thin layer chromatogram (silica gel) with a chyclohexane-ethyl alcohol (4:1) solvent.<br> 4. The female sex pheromone from post-owlatory females played the role of first trigger, inducing a series of courtship behaviour of the Ayu.<br>

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 45 (11), 1375-1380, 1979

    The Japanese Society of Fisheries Science

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