一般虹鳟产卵期在12—2月,采卵作业从晚秋至冬季,已成惯例;但东筑摩明科町县水产试验场,在养殖虹鳟中,用先进技术,除独特的“光调节”法,促虹鳟提前产卵外,甚至连采卵操作,也采用了高效率的技巧,已能从九月中旬,开始采卵。该场每10天采一次卵,目前最多一次可采卵25万粒。亲鱼3—5龄,作为高标准的是4龄鱼,体形健美,尾重1.5—2公斤,体长40—50厘米。采卵操作时,用毛巾把光滑的鱼裹好,放在采卵台上,将压缩空气的注射针,一送入卵巢,在两、三秒钟,一尾鱼就可采琥珀色,直径5毫米的卵二千五百粒。过去需要两个人控制住鱼,挤压卵,还 The general rainbow trout spawning period in the 12 - February, the harvest from late autumn to winter, has become the practice; but the East Building Management Branch of Meridian County aquaculture trial in rainbow trout, with advanced technology, in addition to the unique “light regulation” method , Promoting rainbow trout lay eggs in advance, and even the operation of picking eggs, but also the use of efficient techniques, has been able to start from mid-September, eggs. The field takes eggs once every 10 days, up to 250,000 eggs can be taken at most once. 3-5-year-old broodstock, as a high standard of 4-year-old fish, bodybuilding, tail weight 1.5-2 kg, body length 40-50 cm. Oval operation, wrapped with a smooth towel with a towel on the ovum, the compressed air injection needle, one into the ovary, in two or three seconds, a fish can be taken amber, diameter Five millimeters of eggs two thousand five hundred. In the past it took two people to control the fish, squeeze the eggs, also