The surface ultrastructure of mature egg chorion of the tamed northern sheatfish Silurus soldatovi in Heilongjiang river was investigated by scanning electron microscopy. The outermost layer was composed of a thin lam...The surface ultrastructure of mature egg chorion of the tamed northern sheatfish Silurus soldatovi in Heilongjiang river was investigated by scanning electron microscopy. The outermost layer was composed of a thin lamella of a jelly coat. The surface of jelly coat was characterized by overlapping net-like fibrillar lamellae, many clefts with bridges and pores. The pore canals were 0.25 μm in diameter. The pore density was about 0.7-1.0/μm-2. The pores on the surface of jelly coart were distributed uniformly. Mature eggs of sheatfish possessed a funnel-shaped micropyle in the animal polar region. The micropylar region was about 0.04 mm2 area in diameter with 3-8 ridges in radial arrangement. Fertilized eggs in which jelly coats were removed mechanically presented no adhesiveness and exhibited inlays of irregular granules on their surface.展开更多
香鱼（Plecoglossus altivelis Temminck et Schlegel）俗称留香鱼、海胎鱼，日本人称为鲇鱼，是我国一种小型名贵经济鱼类，其肉质细嫩，味道鲜美，已在浙江、福建、广东、山东等地陆续开展了人工养殖。香鱼系裸卵巢，适当成熟卵母细...香鱼（Plecoglossus altivelis Temminck et Schlegel）俗称留香鱼、海胎鱼，日本人称为鲇鱼，是我国一种小型名贵经济鱼类，其肉质细嫩，味道鲜美，已在浙江、福建、广东、山东等地陆续开展了人工养殖。香鱼系裸卵巢，适当成熟卵母细胞排入到腹腔中，经历96h后仍能受精孵化，其受精率与孵化率分别还有10．83％和0．53％。展开更多
文摘The surface ultrastructure of mature egg chorion of the tamed northern sheatfish Silurus soldatovi in Heilongjiang river was investigated by scanning electron microscopy. The outermost layer was composed of a thin lamella of a jelly coat. The surface of jelly coat was characterized by overlapping net-like fibrillar lamellae, many clefts with bridges and pores. The pore canals were 0.25 μm in diameter. The pore density was about 0.7-1.0/μm-2. The pores on the surface of jelly coart were distributed uniformly. Mature eggs of sheatfish possessed a funnel-shaped micropyle in the animal polar region. The micropylar region was about 0.04 mm2 area in diameter with 3-8 ridges in radial arrangement. Fertilized eggs in which jelly coats were removed mechanically presented no adhesiveness and exhibited inlays of irregular granules on their surface.
文摘香鱼（Plecoglossus altivelis Temminck et Schlegel）俗称留香鱼、海胎鱼，日本人称为鲇鱼，是我国一种小型名贵经济鱼类，其肉质细嫩，味道鲜美，已在浙江、福建、广东、山东等地陆续开展了人工养殖。香鱼系裸卵巢，适当成熟卵母细胞排入到腹腔中，经历96h后仍能受精孵化，其受精率与孵化率分别还有10．83％和0．53％。
