论文部分内容阅读
1981年11月由北京市水产局科教处协助,从北京市昌平县水产养殖场引进尼罗罗非鱼100尾,经繁育及一年多的温流水养殖、季节坑塘养殖,充分体现了个体大,生长快的特点。养殖中对其形态特征、亲鱼繁殖、采卵孵化及季节坑塘成鱼养殖的可能,作了一些观察和初试,现将情况简结如下: 一、引种及越冬保种引种:以4个大塑料桶(满装水50kg)放于汽车驾驶室后排座位上,每个装水40斤,放鱼25尾,共160斤水,鱼40斤,鱼水比为1:4。1981年11月26日12时从北京市昌平县水产养殖场起运,水温21℃,气温
In 1981 November by the Beijing Municipal Bureau of Fisheries Science and Education Office to assist, from Beijing Changping County aquaculture farms introduced Nile tilapia 100, after breeding and more than a year of warm water aquaculture, pond culture season, fully reflects the individual Large, fast growing characteristics. Breeding of its morphological characteristics, broodstock breeding, hatching eggs and the season pit pond adult fish farming may make some observations and first test, the situation is summarized as follows: First, the introduction and overwintering conservation introduction: to 4 large Plastic bucket (full of water 50kg) on the back seat of the car cab, each containing 40 pounds of water, put fish 25, a total of 160 pounds of water, 40 pounds of fish, fish ratio of 1: 4 November 1981 At 12:00 on the 26th from Changping County, Beijing Aquaculture Farm, water temperature 21 ℃, temperature