主养青鱼高产池塘的浮游植物和有机碎屑

PHYTOPLANKTON AND ORGANIC-DETRITUS IN HIGH-OUTPUT FISH PONDS WITH BLACK CARP AS THE MAJOR CULTURED SPECIES

摘要:

本文报道了主养青鱼净产11.25、15吨/公顷·年两个产量级池塘的浮游植物和有机碎屑组成、现存量的研究结果:浮游植物丰度为20-60mg/L,有机碎屑丰度为30-70mg/L;浮游植物群落由7种优势种群交替组成,它们分别是隐藻(Cryptomonas.spp)、蓝裸甲藻(Gymnodinumcyaneum)、裸藻(Euglenaspp)、针杆藻(Synedrasp.)和菱形藻(Nitzschiasp.)、尖头藻(RaphidiopsissPP)、裂面藻(Merismopediaspp.)、绿球藻类(Chlorellaceaespp.),隐藻为主的鞭毛藻类占优势.文中还探讨了浮游植物与鱼池水质净化、浮游植物有机碎屑丰度与鱼产量的关系.

关键词:青鱼;高产鱼塘;浮游植物;有机碎屑

Abstract:

The phytoplankton population and organic-detritus of high-output (11.25-15 metric tons/ha. yr) fishponds with black carp as the major cultured species were studied during 1983-1984. The results indicated that the standing biomass of phytoplankton(wet) was 20-60mg/L and the standing crop of organic-detritus was 30-70mg/L. The dominant species of the studied phytoplankton community are Cryptomonas spp., Gymmodinum cyaneum. Euglena spp., Synedra spp., Nitzschia spp., Raphidiopsis spp., Merismopedia spp. and Chlorellaceae spp., which formed the water bloom alienately. The paper also studied the relationship between phytoplankton and water quality, and the relation between a bundance of phytoplankton organic-detrutus and fish output.

Key words:black carp;high-output fishponds;phytoplankton;organic-detritus