论文部分内容阅读
一、网箱的设置条件 水库养蟹网箱,应设置在避风向阳,水质清新,风浪不大,比较安静,便于管理,无污染,水体交换量适中,有微流水,周围环境开阔,无水老鼠的地方。 二、网箱的准备 养蟹网箱的材料应选用单层聚乙烯或尼龙网片制成。网目大小要根据所养的幼蟹个体大小来决定,以不逃蟹为原则,一般网目选用2 cm左右为宜。网箱规格选用3 m×3 m×1 m,上面有盖网,在网箱顶部留一个可开关的口子,并用尼龙拉链缝上,以便投饵和投草等。网箱底部要固定一个圆形面积约为1 m2左右的密眼网布,作饵料台,防止饵料沉底,造成浪费。
First, the cage set conditions Crab cage should be set in the shelter sunny, fresh water, storm is small, relatively quiet, easy to manage, non-polluting, moderate water exchange, microfluidic, the surrounding open, anhydrous Mouse’s place. Second, the preparation of cages Crab cages materials should be made of single-layer polyethylene or nylon mesh made. The size of the net should be based on the size of the individual cousins raised to decide not to escape the principle of crabs, general mesh selection of 2 cm is appropriate. Cage specifications selected 3 m × 3 m × 1 m, covered with a net above the top of the cage to leave a switch of the mouth, and nylon zipper stitch, in order to feed and grass and other investment. At the bottom of the cage, a dense mesh mesh with a circular area of about 1 m2 shall be fixed for the bait station to prevent the bait from sinking to the bottom, resulting in waste.