Ultrastructure of a Sperm Entry Site beneath the Micropylar Canal in Fish Eggs

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概要

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• Scanning electron microscopy showed that a specialized conformation "sperm entry site" existed as a target organ for a fertilizing spermatozoon on the egg surface beneath the micropylar canal in fish eggs. Species-specific features of the sperm entry site were demonstrated in the three kinds of teleosts examined. The site in Cyprinus eggs formed a gentle cytoplasmic rese, where 19 to 27 cytoplasmic projections protruded. In Tribolodon eggs, the site formed a cytoplasmic rise, on which 16 to 23 cytoplasmic projections protruded in varied thicknesses, and it was surrounded by a ring-like shallow groove. In Plecoglossus eggs, the sperm entry site was characterized by a doughnut-like shape on a plate, with morphological variations.

• 社団法人日本動物学会の論文
• 1982-09-25

著者

• Kudo Shigeharu

  Department Of Anatomy Gunma University School Of Medicine

関連論文

• The Localization of Concanavalin A Binding Sites in the Common Carp Egg
• Ultrastructure of a Sperm Entry Site beneath the Micropylar Canal in Fish Eggs
• Ultracytochemical Localization of Cholinesterase Activity in Cortical Alveoli of Tribolodon Egg
• Ultrastructural Modifications of Fertilization Envelope in the Carp Egg
• Ultracytochemical Observations of the Pancreatic Islet Cells in the Crucian Carp by ZIO-Reaction and IDPase Activity
• Studies on the Discharge of Two Kinds of Granules in Fertilized Eggs of Carassius carassius
• On Discharge of Two Kinds of Granules in the Inseminated Egg of Cyprinus carpio

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