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随着近年青虾养殖业的发展,苗种需要量越来越大,掌握亲虾的收集和运输技术,是搞好苗种繁育、发展生产的前提,现将其技术要点介绍如下: 一、亲虾的收集 繁殖用的青虾一般是在春季繁殖季节从湖泊中捕来,最好是用抄虾网、虾笼或虾罾捕获的,这样捕获的虾不易受伤,活力强。 在靠近湖泊的地方可以直接收集抱卵雌虾,在虾源不方便的地方则应预先收集末抱卵的雌雄青虾,尽量选择体长5厘米以上,体重2克以上的大虾。雌虾卵巢要成熟或接近成熟,可根据雌虾头胞胸部背面的卵巢大小判断,成熟或接近成熟
With the development of aquaculture in recent years, the demand for seedlings is getting larger and larger. Mastering the collection and transportation of broodstock is a prerequisite for breeding and development of seedlings. The main technical points are as follows: Shrimp Stocking Freshwater shrimp are usually harvested from lakes during the spring breeding season and are best harvested from shrimp prawns, shrimp cages or shrimps, making shrimp catch less invasive and more viable. In the vicinity of the lake can be collected directly female spawning eggs in the inconvenient place shrimp should be collected before the end of the spawning of male and female shrimp, try to choose more than 5 cm body length, weight 2 grams or more of prawns. Female or female ovary to mature or near maturity, according to the size of the ovary on the back of the head of femur head cells to judge, mature or near-mature