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河蟹具有适应性强,生长快的特点,是我国淡水增殖的优良品种之一。但至目前,从各地报导来看,河蟹放养,仅限于沼泽、外荡、湖泊等自然水域,很少有在各类水库中放养的;即使有,也是在上述湖盆基础上,经过筑堤、建闸,拦蓄洪水的水库,如我省的白洋淀、江苏省的骆马湖水库等。为什么不广泛利用水库增殖河蟹资源呢?据说是“因为河蟹掘洞,损害大坝,影响水库安全!”究竟河蟹在什么地方掘洞?洞有多深?对大坝有多大影响?现就调查情况提出一些看法,供大家讨论。
Crab has the characteristics of strong adaptability and fast growth, and is one of the fine varieties of freshwater proliferation in China. However, up to now, it has been reported from all over the world that crab stocking is limited to natural waters such as swamps, swarms and lakes and is rarely stocked in various types of reservoirs; if any, , Built gates, reservoirs to block floods, such as Baiyangdian in our province, Luoma Lake Reservoir in Jiangsu Province. Why not extensive use of reservoir proliferation of crab resources? It is said that “because of crabs digging holes, damage to the dam, affecting the safety of reservoirs!” After all, where the crab hole excavation? How deep the hole? How much impact on the dam? Some comments on the situation for discussion.