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丽水地区的科技人员为改善山区人民生活,自1981年起,从海边捞来河蟹苗,放养在山间溪流里,第二年冬天就捕到了鲜活的成蟹。河蟹是海里生、河里长,通常只在河道、湖泊等平原水网地带生长。把河蟹放进山间溪流后,为适应新的生态环境,它就在岩石底下销洞穴居,并夺取附着在卵石上的硅藻、蠕虫和有机腐屑等为食,不少河蟹还沿着细小的水渠沟道爬到稻田里寻找更丰富的食物。
In order to improve people’s life in mountainous areas, scientists and technicians in Lishui Prefecture have harvested crabs from riverside since 1981 and stocked them in mountain streams. Fresh crabs were caught the following winter. Crabs are born in the sea, the river long, usually only in rivers, lakes and other plain water network growth. After the crab into the mountain stream, in order to adapt to the new ecological environment, it is in the bottom of the cave quarry cave, and seize the pebbles attached to the diatoms, worms and organic decay for food, many crabs also along Small channels dig into the rice fields to find richer food.