軟体動物の教材化に関する研究 : 2. カワニナの胚発生

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  • ナンタイ ドウブツ ノ キョウザイカ ニ カンスル ケンキュウ 2 カワニナ
  • Studies of Molluscs as Teaching Materials : 2. Embryonic Development of a Freshwater Snail

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Embryonic development of a common freshwater snail, Semisulcospira libertina was studied from some biological and educational interests. In this ovoviviparous species, females had hundreds of embryos in the brood pouch all the year round. Typical spiral cleavage, the trochophore and veliger larvae, and birth of the young snails could be observed easily at any time of the year.

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