【摘要】 <正> 东海北部带鱼种群生殖期从4月延续到10月。根据成熟系数和成熟度的观察,生殖盛期出现在6—7月。8—10月,在海礁附近和其外伸海域出现两群生殖腺发育状况不完全相同的鱼群。它们的长度分布也颇为不同,于海潜礁附近渔场的鱼群,长度主要分布为170—230毫米,多为进行生殖的更多还原

【Abstract】 The maturation process of the hairtails was studied during the period of 1979-1980. Histological sections of the gonads were made and examined microscopically for each of the mature and the immature. The maturation regularity of both the spring group and the autumn group was studied monthly. The relationship between the growth rate and sexual maturation of the hairtails was studied from 1978 to 1981. The results obtained are summarized as follows: 1) Spawning season was found to extend from April to October. The spring group and the autumn group were identified from the diameter of the first otolith ring; 2) The maturation process of the generation was completed in one year; 3) Age composition changed little in 1978-1981. 1-year old fish dominated the spring and summer catches, 0-year old the autumn and winter catches.更多还原