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|Title:||Effects of industrial wastes on the growth and reproductive stages of macroalgae of Visakhapatnam coastline, east coast of India|
|Authors:||Murthy, S. B. K.|
Rao, M. Umamaheswara
|Keywords:||Industrial wastes;toxic effects;marine algae;growth;reproduction;Visakhapatnam coast|
|Abstract:||Experiments were conducted to understand the effects of effluents and sediment extracts of Hindustan Zinc Smelter and Alum factory, on the growth and reproductive stages of 9 macroalgae of the Visakhapatnam coast. In fully grown algae, growth inhibition was minimum at 0.001 or 0.01 % concentrations of HZE-I and II, HZR-I and II and AFE and AFR and maximum at intermediate concentrations (2.5-25 % HZE and R-I and 0.25-8.0 % HZE and R – II and AFE and AFR). Stationary growth and death of algae was observed at highest concentrations tested. The toxic effects were more in HZE- II and HZR – II, than in AFE, AFR, HZE-I and HZR-II. Tetraspore production from one brown and 4 red algae and spore germination decreased from 2.0-10.5 % HZE-1 and HZR-I and from 0.1-1.8 % of other wastes. Sporeling growth and survival were affected at concentration 4-150 times less than those observed for the fully grown algae. Among the 3 classes of algae tested, green algae were more tolerant to the industrial wastes, than the brown and red algae. These culture experiments indicated the damage caused by industrial wastes to macroalgal communities.|
|Appears in Collections:||IJMS Vol.32(1) [March 2003]|
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