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- W1831409513 abstract "The histological anatomy of the genital ducts of adult females of Eriocheir sinensis was studied before and after copulation, and during and after egg-laying. A strongly basophilic valve-like tissue was discovered at the junction of the spermatheca and the oviduct. This tissue prevents communication between the spermatheca and the oviduct except during oviposition. At this time, it functions as a valve, allowing ripe eggs out of the oviduct and preventing sperm from entering the oviduct during and after egg-laying. These findings suggest that the actual site of gamete contact in E. sinensis is within the spermatheca, instead of in the lumen of the ovary or in the oviduct. The presence of the valve-like tissue assures that the ripe eggs collected from the ovary during egg-laying are unfertilized. This observation is of great importance for obtaining unfertilized ripe eggs in studies of artificial fertilization (in vitro) and hybridization. The valve-like tissue has not been described in other brachyurans, and this genital duct should be classified as new for the Brachyura." @default.
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- W1831409513 date "1990-04-01" @default.
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- W1831409513 title "Structure and Function of a Special Tissue in the Female Genital Ducts of the Chinese Freshwater Crab <i>Eriocheir sinensis</i>" @default.
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- W1831409513 doi "https://doi.org/10.2307/1541967" @default.
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