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河蟹,学名中华绒鳌蟹,俗称螃蟹。河蟹是出口换汇的水产品之一。阳澄湖大闸蟹驰名中外,每年有数百吨河蟹销往港澳地区及海外,市场潜力很大。一、河蟹的繁殖习性河蟹是在海水里繁殖,淡水中生长的底栖动物。河蟹在淡水中经两个秋龄的生长,性腺发育成熟,每年秋末冬初开始,离开生长发育的栖居地,大批成熟的亲蟹成群结队向河口浅海处迁徙、交配、产卵、繁衍后代,这就形成了一年一度的
Crab, scientific name cashmere A crab, commonly known as crabs. Crab is one of the aquatic products for export exchange. Yangcheng Lake hairy crabs known at home and abroad, each year hundreds of tons of crabs sold to Hong Kong and Macao regions and overseas, the market has great potential. First, the habit of breeding crab Crab is breeding in the sea, freshwater benthic animals. Crab in freshwater by two autumn growth, gonadal development, the beginning of autumn and early winter each year, leaving the habitat of growth and development, a large number of mature crabs in droves to the estuary shallow sea migration, mating, spawning, Generate offspring, which formed an annual