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青蟹肉质鲜美,营养丰富,商品价值颇高,属珍贵水产品,近年来受沿海养殖户青睐,养殖面积迅速扩大,经济效益不断提高。青蟹对水温适应范围在15~30℃,当水温降至14~12℃时,只在晚间作短暂活动,并开始挖洞穴居;水温10℃左右时,行动缓慢,反应迟钝;水温7℃时,则停止摄食与活动,进入冬眠;水温低至3.5℃或连续几天低于6℃时,青蟹则会死亡.因此,进入冬季后,不仅市场上难以觅到青蟹,且自然越冬成活率也较低。为此,
Blue crab meat, delicious, nutritious, high commodity value, is a precious aquatic products, in recent years, favored by coastal farmers, aquaculture area expanded rapidly, and continuously improve economic efficiency. When the water temperature dropped to 14 ~ 12 ℃, the crabs only made short-term activities at night and began to dig burrows. When the water temperature was about 10 ℃, the action was slow and unresponsive; the water temperature was 7 ℃ , Then stop feeding and activities, into hibernation; water temperature as low as 3.5 ℃ or several days less than 6 ℃, blue crabs will die.Therefore, into the winter, not only hard to find crabs on the market, and the natural wintering Survival rate is also lower. to this end,