Hydrobiological Bulletin

, Volume 25, Issue 2, pp 157–162 | Cite as

Seasonal fluctuations of zooplankton biomass in Lake Xolotlán (Managua)

  • Emma Mangas
  • Helen Garcia


Seasonal fluctuations of zooplankton biomass (dry weight) were determined during a year in two localities of Lake Xolotlán (Managua). Biomass estimations of the most common species of rotifers, cladocerans and copepods were made. The maximal zooplankton biomass was observed in February–April (dry season) in coincidence with the period of highest phytoplankton abundance. Copepods contributed with 78% and 84% to the mean zooplankton biomass at points 1 and 7, respectively. Cladocera biomass was lowest during most of the year, and it was probably controlled by fish predation. Development of rotifer biomass was more intense during the rainy season, when detritus particles were more abundant. Daily fluctuations of zooplankton biomass were not pronounced.


zooplankton biomass dry weight 


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Copyright information

© Netherlands Hydrobiological Society 1991

Authors and Affiliations

  • Emma Mangas
    • 1
  • Helen Garcia
    • 1
  1. 1.Centron para la investigacion en recursos aquaticos de nicaraguaManaguaNicaragua

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