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生态学杂志 ›› 1982, Vol. ›› Issue (3): 12-15.

• 研究报告 • 上一篇    下一篇

青海湖裸鲤种群结构变异与资源利用

赵利华   

  1. 中国科学院西北高原生物研究所
  • 收稿日期:1981-09-16 出版日期:1982-07-10

VARIATION OF THE POPULATION STRUCTURE OF NAKED CARPS[GYMNOCYPRIS PRZEWALSKII PRZEWALSKII(KESSLER)] IN THE QINGHAI LAKE AND STOCK UTILIZATION

Zhao Lihua   

  1. Northwest Plateau Institute of Biology, Academia Sinica
  • Received:1981-09-16 Online:1982-07-10

关键词: 机械作业, 土壤, 生态因子, 生物效应

Abstract: Investigation showed that in the earliest stage of exploitation, catches greatly exceeded recruitments, population structure changed obviously.Afterwards, the structure kept stable, the growth rate became quicker,sexual maturity was earlier than before,reproduction capacity was increasing and sexual structure changed to favour the females, egglaying stock became younger. In order to properly utilize the stock, it is considered that the mesh of fishnets must be enlarged to prevent over - fishing.

Key words: Mechanized cultivation, Soil, Ecological factors, Biological effect