セクションアウトライン

    •  Eels matured by artificially induced maturation require the administration of a maturation-inducing hormone (17,20β-Dihydroxy-4-pregen-3-one : DHP) for spawning.

      However, DHP is not administered to all individuals.

      The condition of the eggs should be checked before the injection of DHP.

      Oocytes (follicles) are sampled from the cloaca of eels for size check, and DHP is only injected into the abdomen of individuals with an oocyte diameter of 750 μm or more.

      The amount of DHP injected into each individual at this time is 2 μg/g (body weight), so the body weight needs to be measured before the injection.


      　Injection of DHP into the abdomen of an eel

    • [Open Access] Kagawa et al., 1997, Fisheries Science URL