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日本(?),俗称大红腿、靠山红、赤甲红,是一种营养价值高,食用普遍,经济效益高的蟹类,具有生长快,适应性强,耐低温,宦于虾池育肥、暂养的特点。盛产于黄渤海水域,在自然海区中到9月份单只可达150g左右,再经过150多天的育肥、暂养,于春节前后投放市场,可获得很高的经济效益。本地养殖户在虾池中从事育肥、暂养日本(?)已经有数年的历史,达到了综合高效利用虾池的目的。育肥、暂养面积扩大到5000多亩,养成技术趋于成熟,成活率达80％以上,利润率超过50％,已经形成年产量约4000 t的市场规模。现将有关技术经验介绍如下:
Japan (?), Commonly known as the big red legs, by the red, red red, is a high nutritional value, universal food, high economic benefits of crabs, with fast growth, adaptability, low temperature, Holding characteristics. Rich in the Yellow Sea and the Bohai Sea waters, in the natural sea area to September only up to about 150g, and then after 150 days of fattening, holding, put on the market before and after the Spring Festival, access to high economic benefits. Local farmers engaged in fattening shrimp ponds, holding Japan (?) Has several years of history, reached the purpose of comprehensive and efficient use of shrimp ponds. Fattening, holding an area expanded to 5,000 mu, develop technology to mature, the survival rate of 80% or more, the profit rate of more than 50%, has formed an annual output of about 4000 t of the market size. The relevant technical experience is as follows: