this was m subject topic for m MSc final year semester in calcutta university..
it is wonderfull to knw dat planktons play a very vital role in d ecological balance and trophic level or food chain.
As most of us know that planktons are fed by plankton feeding fishes.,they are getting a hipe for thie culture to enhance fish culture and production.
their vertical or light stimulated movement can cause differential feeding habit in fishes. and thus allowing growth of various types of plankton feeding fishes in a single water body with maximum utilization..
But the sad point lies in their decrease in number due to pollution, less light availability, claimate changes affecting both water quality and fish culture.
we an study much about this issue and bring some changes....