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INDIAN HYDROBIOLOGY, VOL.3 No.1, JANUARY, 2000

EVALUATION OF PHYSICO-CHEMICAL AND MICROBIOLOGICAL PARAMETERS OF VYZADI RESERVOIR WATER, - S.V. AGARKAR, DEPT. OF CHEMISTRY, ANURADHA ENGINEERING COLLEGE, CHIKHLI - 443 201, AND A.M. GARODE, DEPT. OF MICROBIOLOGY, SHRI SHIVAJI SCIENCE COLLEGE, CHIKHLI - 433 201, DIST. BULDANA (MAHARASHTRA) - PP. 3 - 5.

Abstract:  An attempt has been made to assess the quality of Vyzadi reservoir water and its suitability for drinking purpose. The study was carried out by collection of water samples from four sampling stations.  The samples were collected bimonthly and were analyzed for temperature, turbidity, pH, electrical conductivity, total solids, chlorides, salinity, total alkalinity, total hardness, calcium, magnesium, sulphate, phosphate, nitrate, dissolved oxygen, free CO2, oil and grease content, MPN of coliforms, total E. coli, faecal streptococci and heterotrophic bacteria.  The analyzed data is compared with permissible limits as prescribed by WHO, ISI and ICMR for drinking water quality.

CHEMICAL DEFENSE IN TROPICAL GREEN ALGAE (CHLOROPHYTES): THE RELATIONSHIP BETWEEN FEEDING DETERRENCE AND TOXICITY - D.A. BENI GIRASPY, W.G. IVY AND P. NATARAJAN, DEPARTMENT OF AQUATIC BIOLOGY AND FISHERIES, UNIVERSITY OF KERALA, TRIVANDRUM – 695 007, KERALA, INDIA. - pp. 7 - 13.

Abstract: Twenty three species of seaweeds (Chlorophytes) were examined for the feeding deterrence and ichthyotoxic characteristics.  Feeding deterrence was examined by offering methanolic extract treated fish food to the experimental fish Gambusia affinis.  Forty eight percent of the 23 algal extracts were found to produce negative feeding response.  Ichthyotoxicity was tested by exposing the test fish G. affinis to methanol extracts of seaweeds and assessing their mortality.  Thirty five percent of the algal extracts were determined to be toxic at various concentration levels.  Eighty eight percent of the toxic algal species exhibited feeding deterrent property while 63% of the deterrent species were in the toxic category.  A significant association was found between ichthyotoxicity and feeding deterrence.

SPECIES DIVERSITY AND SIMILARITY INDICES OF PHYTOPLANKTON IN COASTAL WATERS OF NORTHERN ANDHRA PRADESH, EAST COAST OF INDIA - Y. SAROJINI AND G. SUBBARANGAIAH, DEPARTMENT OF BOTANY, ANDHRA UNIVERSITY, VISAKHAPATNAM - 530 003 - PP. 15 - 17.

Abstract: The phytoplankton density and distribution were studied in detail in coastal waters of northern Andhra Pradesh during January to April.  The phytoplankton density ranged from 2.9 to 21.4 x 10' cells       with a highest density in April 1999.  The species diversity ranged from 2.4 to 6.1 bits/individual with the highest index in January and lowest in April 1999.  The extent of similarity index ranged from 32 to 90% with the highest similarity between stations 1, 4 and also between 2, 4 observed in April and lowest between stations 2, 4 in March.  The highest standing crop is observed to have a negative effect on species diversity.  The similarity indices between stations indicated the fertility of water and their resemblance with one another.  The lowest similarity indicated the extent of diversity in distribution and the highest showed the resemblance in dominance and distribution of species of phytoplankton at different locations.  Even though the relative abundance of species and their dominance varied in different months at different locations, the upwelling water currents were held responsible for higher plankton production during the study period.

AUTECOLOGY OF THE PLANKTONIC CYANOBACTERIUM MICROCYSTIS AERUGINOSA - S.P. ADHIKARY, P.G. DEPARTMENT OF BOTANY, UTKAL UNIVERSITY BHUBANESWAR - 751 004, ORISSA -  PP. 19 - 23.

Abstract:  Growth response of Microcystis aeruginosa at various pH (5, 6, 7, 8, 9) temperature (15, 25, 35 Deg.C) and light intensity (2.5, 7.5, 12.5 W/m) and in presence of different concentrations of nitrate and phosphate in BG 11 medium was studied.  The organism grew well at alkaline range of the culture medium and preferred higher temperature and light intensity.  Reduction of phosphate and nitrate level by one third to half of the prescribed concentration supported better growth.  Cell size of the organism was increased under those conditions of culture which reduced the growth of the cyanobacterium.

STUDIES ON SUCCESSION OF SUBAERIAL ALGAE IN CULTURE - S. CHANDRA & V.KRISHNAMURTHY, DEPARTMENT OF BOTANY, PACHAIYAPPA'S COLLEGE, CHENNAI - 600 010 AND KRISHNAMURTHY INSTITUTE OF ALGOLOGY, 15, RAMANATHAN STREET, T. NAGAR, CHENNAI - 600 017.

Abstract:  Collection of algae from different sub-aerial localities at Chennai and Vandalur (bark of a tree, stones, wall, pond margins, rocks and Anthoceros sp.) were cultured and these cultures yielded 32 genera and 42 species.  Blue green algae constituted 15 genera and 23 species; green algae 9 genera and 10 species and diatoms 7 genera and 9 species.  The present study revels that the sub-aerial algal flora in the Chennai regions is dominated by blue-green algae.  The highest number of species was found growing on a wall and the lowest number were found epiphytic on Anthoceros sp.  Two species viz. Coleochaete scutata and Rhizoclonium hieroglyphicum which came up in cultures are regarded as adventitious, as these do not survive in the vegetative state in sub-aerial situations.

MORPHOLOGY OF DRAPARNALDIOPSIS KRISHNAMURTHYI BALUSWAMI AND RAJASEKARAN FROM KAMBAKKAM, ANDHRA PRADESH - M BALUSWAMI AND M. RAJASEKARAN, DEPARMENT OF BOTANY, MADRAS CHRISTIAN COLLEGE (AUTONOMOUS), MADRAS - 600 059 - pp. 39 - 42.

Abstract: Draparnaldiopsis krishnamurthyi is described as a new species from Kambakkam, Andhra Pradesh, India and its development and life history in culture are given in detail.

SARGASSUM THIVYAE, A NEW SPECIES FROM GUJARAT, INDIA - V. KRISHNAMURTHY AND R. EZHILI, KRISHNAMURTHY INSTITUTE OF ALGOLOGY, 15, RAMANATHAN STREET, T. NAGAR, CHENNAI  - 600 017 - pp. 43 - 44.

Abstract:  Herbarium specimens of Sargassum merrifieldii sensu Chauhan and Thivy (1965) located in the Central Salt and Marine Chemicals Research Institute, Bhavnagar, were examined and it was concluded that these plants were different from S. merrifieldii J. Ag.  The Indian specimens are therefore placed in a new species, Sargassum thivyae sp. nov.

SOME NEW SPECIES OF ALGAE FROM INDIA - V.KRISHNAMURTHY AND M. BALUSWAMI, KRISHNAMURTHY INSTITUTE OF ALGOLOGY, 15, RAMANATHAN STREET, CHENNAI - 600 017 AND DEPARTMENT OF BOTANY, MADRAS CHRISTIAN COLLEGE, TAMBARAM - 600 059 - pp. 45 - 48.

Abstract:  Two red algal species, Audouinella jogensis Iyengar and Euptilota krusadiense Krishnamurthy, previously published without a latin description are now validated.  Two new species of Lobophora, L. indica and L.minima are described, illustrated and discussed with reference to previous records of L. variegata from India.

SARGASSUM POLYCYSTUM C.AG. AND SARAGASSUM TENERRIMUM J.AG. FROM INDAN SHORES - V. KRISHNAMURTHY AND RL EZHILI, KRISHNAMURTHY INSTITUTE OF ALGOLOGY, 15, RAMANATHAN  STREET, THEAGARAYANAGAR, CHENNAI - 600 017 - pp. 49 - 55.

Abstract:  Extensive collections of Sargassum polycystum C.Ag. Andµm.    Sargassum tenerrimum J.Ag. collected from all over the Indian coasts were examined and complete characterizations of the two species worked out.  Infraspecific taxa recognized by Grunow (1915-16) were found to be doubtful. It was also found that there was practically no difference between S.polycystum and S. myriocystum and the latter should therefore be merged in S. polycystum.   Detailed describption of S. tenerrimum was prepared. S. priamaticum Chauhan is reduced to the status of a variety under S. tenerrimum.

CONTRIBUTIONS TO CHLOROPHYCEAN ALGAL FLORA OF MADRAS - USHA KRISHNAN * AND S. BHARATHAN **, * DEPARTMENT OF BOTANY, STELLA MARIS COLLEGE, MADRAS - 600 086. ** POSTGRADUATE AND RESEARCH DEPARTMENT OF BOTANY, PACHAIYAPPA'S COLLEGE, MADRAS -600 030. - pp. 57   - 63.