白洋淀白鲦鱼的生物学研究

本文对重新蓄水后白洋淀白鲦鱼的生物学特性进行了研究，经分析，发现群体中尤以１－１￣＋年龄个体比例最大，约占７３．９１％，反映出该种群正值恢复阶段，测定１６尾雌鱼，其平均怀卵量为１４９９４粒／尾，相对怀卵量１４４１粒／克体重，成熟系数最高达２６．３％，说明该种群繁殖力较强。因而，应保护其生存环境，有计划地捕获，以利于该种群得到快速恢复、发展。

The Biology of Hemiculter leucisculus in Bai Yangdian Lake

The partial population of fish were resumed after the Bat Yangdian lake having been dried for five years and stored with water again in summer in 1988.In the lake,Hemiculter leucisculus grew well.After analysis,the 1-1￣+ year old individuals were accounted for 73.91% of the colony.The population renected resuming period.The sixteen female fish were examined.The avarage quantity of fish being with roe was 14994,the relative quantity of roes per body weight was 1441 and the mature coefficient was up to 26.3%.All these showed that the reproductive capacity of the population was high.We should pay more attention to protect its living environment and catch in a planned way for resuming and developing quickly of the population.