据了解,有不少地方的养蟹户在建蟹池时,都习惯在池中间设1至3个蟹岛不等,有的蟹岛面积占池塘水面的1/3左右。其实这种做法是很不科学的,至少有以下5大害处: 1.无形中缩小了养殖面积,减少了池塘中的载蟹量,降低了养殖产量。 2.蟹池中有了蟹岛,河蟹容易打洞,打洞后,河蟹生活在洞内、平时活动减少,久而久之就会形成懒蟹。而且洞内的水温较低,影响河蟹正常 It is understood that many local crabs in the construction of crab pool, are accustomed to set up in the middle of the pool 1 to 3 crabs ranging, some crab island area accounts for about 1/3 of the pond surface. In fact, this approach is very unscientific, at least the following five major disadvantages: 1. Invisible to reduce the breeding area, reducing the amount of contained crabs in the pond, reducing aquaculture production. 2. crab pool in a crab island, crab easy to hole, hole, crab living in the cave, usually reduce activity, over time will form lazy crab. And the lower the water temperature in the cave, affecting crab normal