PLANKTONIC CYANOPHYCEAE (OSCILLATORIACEAE) IN FISH PONDS OF LOWER SINDH ( PAKISTAN) - I

Abstract

he 22 taxa of phytoplankton algal species belonging to the genra, Spirulina Arthospira and Oscillatoria of Oscillatoriaceae constitute the subject of this paper. The species of these sheath less genra were collected from fresh water ponds of district Thatta, Sindh, Pakistan. The specles develop profusly in fish ponds and lakes, damage the quality of water, and Impare the use of water. Some of the species of Oscillatoria has been reported to cause water blooms. Out of 22 species reported here 4 species belong to the genra Spirulina, 2 species to Arthospira and 16 species to Oscillatoria. The paper is based on original material collected from these ponds. Most of the species are new records.