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淤泥湖近太湖新银鱼的生物学及其增殖途径的研究[J]. 水生生物学报, 1995, 19(4): 354-359.
引用本文: 淤泥湖近太湖新银鱼的生物学及其增殖途径的研究[J]. 水生生物学报, 1995, 19(4): 354-359.
Gong Shiyuan, Zhang Xunpu, He Shengqiu. ON THE BIOLOGY OF NEOSALANXPSEUDO-TAIHUENSIS AND ITS WAY OF MULTIPLICATION IN YUNI LAKE[J]. ACTA HYDROBIOLOGICA SINICA, 1995, 19(4): 354-359.
Citation: Gong Shiyuan, Zhang Xunpu, He Shengqiu. ON THE BIOLOGY OF NEOSALANXPSEUDO-TAIHUENSIS AND ITS WAY OF MULTIPLICATION IN YUNI LAKE[J]. ACTA HYDROBIOLOGICA SINICA, 1995, 19(4): 354-359.

淤泥湖近太湖新银鱼的生物学及其增殖途径的研究

ON THE BIOLOGY OF NEOSALANXPSEUDO-TAIHUENSIS AND ITS WAY OF MULTIPLICATION IN YUNI LAKE

  • 摘要: 近太湖新银鱼的生殖期为春夏季的3月底至6月上旬,产卵盛期为4月上旬和5月上旬.性成熟年龄为1年,属分批产卵类型.终生以浮游动物为食.生长1年平均全长为68.7mm,平均体重为0.70g.产卵后不久死亡,寿命只有1年.捕捞近太湖新银鱼的合理时期为冬季,捕捞期内划定禁渔区和向禁渔区放流部分亲本.产卵盛期人工放流受精卵或银鱼苗.

     

    Abstract: Investigations on the biology of a small-sized commercial fish,Neosalanx pseudotaihuensis were carried out in Yuni lake of Hubei Province from March 1992to Mav 1993.This fish is a kind of zooplankton feeder,feeding mainly on Cladoceraand Copepoda. It grows fast and reaches 68.7 mm in average total length and 0.70gin average weight within only one year.The one year old fish become sexuallymatured,and the spawning took place from the end of March to the first ten daysof June with prosperous spawning occurring during the first ten days of April andof May. After the spawning of the first batch of eggs,ovaries of the fish regeneratedinto Stages Ⅲ-Ⅳ,and continually developed rapidly into Stage Ⅳ and Ⅴ. Thefish were thus ready for a second spawning.It is obvious that the fish is ofmultiple spawning type.After the last spawning,the parent generation died off.The lifespan of the fish lasts one year only.The rational fishing season for thisfish should be among the winter. But reserved zones lnust be set up in the lake tostock part of the generation which will reproduce next year. However, during theperiod reproduction fertilized eggs or artificially hatched fries should be stocked.

     

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