Developmental Processes in Marine Limpets and the Use for Biology Education

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  • 笠貝の発生過程と授業での活用
  • カサガイ ノ ハッセイ カテイ ト ジュギョウ デノ カツヨウ
  • カサカイ ノ ハッセイ カテイ ト ジュギョウ デノ カツヨウ

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Limpets (Mollusca: Gastropoda) are some of the most abundant animals in the intertidal zone of rocky shores. Here I report methods for collecting and culturing the limpets, especially Nipponacmea fuscoviridis, and describe developmental processes in this species. Adults of N. fuscoviridis collected from May to November had ripe gonads. They could be maintained for 1-2 months without food at room temperature. Immature oocytes obtained from ovaries were induced to mature by ammonia treatment. Following insemination, the ammonia-treated mature oocytes formed the first and second polar bodies, cleaved, and developed to veliger larvae within 1 day. N. fuscoviridis may be one of the most convenient animals for observing the developmental processes in the classroom.

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