Algal characterizationThe microscopic observation of cell morphology such as
the size of the organism, presence or absence of chloroplast,
eyespot, flagella, paramylon bodies etc. was taken
into account and identified as E. tuba (Carter). Microscopic
observation of random samples after centrifugation
assured that the samples were free from any other algae
as well as phytoplankton contaminations which was supported
by previous reports that the blooms of Euglena
species occur at higher temperature, lower dissolved oxygen
and acidic environment with higher nutrient concentration
which significantly inhibits the growth of other
algal species and phytoplankton (Munawar 1970; Wetzel
1983; Hosmani 1988; Xavier et al. 1991).