摘要
对太湖秀丽白虾怀卵亲体进行培养,两次共获苗1.35万余尾,在实验室内成功地完成了虾苗至亲体一个生命周期的饲养。同期结合对太湖白虾的定期采样测定,分析描述了太湖白虾的生长与繁殖规律,并对其食性进行了定性与定量的研究分析。
Through the investigation of Palaemum modeslus (Heller) in Taihu Lake, we explored the resource alternation and food composition of shrimp. The shrimp resources decreased rapidly with the increase of ice-fish resources. Its catching yield reduced from 2310. 90 ton in 1975 to 156. 25 ton in 1992. The shrimp was omniovorus and had no distinct selection to zooplankton. The residues of zooplankton in the shrimp stomach are similar to the dominant populations of zooplankton in the lake. We also cultured the shrimp larvae hatched in labolratory and studied their growth, reproduction and quantitative assay of feeding, 2. 7 percent of the larvae which were cultured 2. 5 months and hatched in June or July might reach to their biological minimal form and others reached to their biological minimal form at eleven-month-age in May next year, and bore eggs in the second time at M. 5-month-age, but the egg number was clearly less than the first time. Parent shrimps died continuously after their larvae hatched. It is proved indirectly that the age of the shrimp was about fifteen monthes through culture in two times' egg-laying of the same reproduction population. By means of labolratory experiment, we also conclude that the feed rate of the shrimp was 30. 82,and the food efficient change 3. 25 percent.
出处
《湖泊科学》
EI
CAS
CSCD
1995年第1期69-76,共8页
Journal of Lake Sciences
