摘要
鱼类性成熟的研究对种群数量的预测和控制具有重大意义,因而日益为人们所重视。带鱼Trichiurus haumela(Forskål)是我国主要经济鱼类,产量居全国首位。当前对这种鱼类资源如何进行科学的利用已成为急需解决的问题,但对其某些主要生物学特性,至今仍了解得很少。本文仅就其种群数量问题中的主要环节之一,性成熟特性与补充速度进行了研究,现分述如下。
The specimens in the present investigations were collected from March to June in 1979 and April to October in 1980.Their microscopic(282 specimens)and macroscopic(3922 specimens)ovary development changes have been observed.Materials to substantiate the histologic criterion for disting-uishing the sexually immature(stageⅡ_(A,B)),maturing(stageⅢ_(C-E),Ⅳ_(F))and matured(stageⅣ_(C),Ⅴ_(H))ovaries of this species are given here.The results obtained are summarized as follows:The development and maturation of the ovary is related to the rate of growth.The growth rate of the maturing individuals is faster than the immaturing individuals,that is,the rate of the maturation increases with the growth of the fish.The female hairtails in East China Sea were divided into two groups:the earlierborn and the later-born groups.The rate of maturation of the earlier-born groups was estimated to be 7——41%from August to October for 6 month olds,and 100%for the one year olds.The rate of maturation of the later born was estimated to be 20—100%from July to October for the 10 month olds.The maturation process of hairtails is faster than others.The biological minimum size was about 170—180 mm in body length and 80—100 grams in body weight for the female.
作者
罗秉征
卢继武
黄颂芳
Luo Bingzheng;Lu Jiwu;Huang Songfang(Institute of Oceanology,Academia Sinica)
出处
《海洋与湖沼》
1983年第1期54-63,105-106,共12页
Oceanologia Et Limnologia Sinica
