, Volume 24, Issue 3–4, pp 556–566

On the ecology of algae in certain fish ponds of Hyderabad-India

  • A. R. Zafar

DOI: 10.1007/BF00142002

Cite this article as:
Zafar, A.R. Hydrobiologia (1964) 24: 556. doi:10.1007/BF00142002


The paper deals with the distribution of certain classes of algae in two fishponds of Hyderabad — India. Amongst all the ecological factors discussed in this regard, it is emphasized that Pearsall's basic ratio of water (Na + K/Ca + Mg) plays a distinctly important role. It is concluded that (a) if the basic ratio fluctuates between .027 and 1.2, Diatoms dominate the algal population, (b) if it works out between 1.2 and 2.0, green algae and Diatoms contribute more or less equal percentages to the bulk of phytoplankton and (c) if it is higher than 2.0, there is very little chance of Diatoms becoming dominant as the green algae, particularly Chlorococcales and Desmids, are in abundance. It is also noted that very high values of the basic ratio (3.7–5.5) do not help in increasing the percentage of green algae any further in the population.

Copyright information

© Dr. W. Junk Publishers 1964

Authors and Affiliations

  • A. R. Zafar
    • 1
  1. 1.Department of BotanyOsmania UniversityHyderabad

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