Three species, Bathynomus decemspinosus, B. doederleini and B. kensleyi （Crustacea, Isopoda, Cirolanidae）, are reported for the first time from the Parangipettai coastal waters, Southeast coast of India. Several Tri...Three species, Bathynomus decemspinosus, B. doederleini and B. kensleyi （Crustacea, Isopoda, Cirolanidae）, are reported for the first time from the Parangipettai coastal waters, Southeast coast of India. Several Trilasmis （Temnaspis） tridens （Cirripedia Thoracica, Lepadomorpha） were attached to the pleopods of some individuals. So, five bathynomid species are currently reported from India.展开更多
The results of an investigation carried out during June 2005 to May 2007 on physico-chemical parameters,species composition and community structure of phytoplankton including Chlorophyll a（Chl-a） at the Coleroon coa...The results of an investigation carried out during June 2005 to May 2007 on physico-chemical parameters,species composition and community structure of phytoplankton including Chlorophyll a（Chl-a） at the Coleroon coastal waters（Southeast coast of India） are reported.Air and surface water temperatures（℃） varied from 25.1 to 30.1 and from 24.5 to 28.5 respectively.Salinity values varied from 6 to 28.5 and the pH ranged between 7.0 and 8.3.Variation in dissolved oxygen content was from 3.1 to 7.5 mg/dm^3 while the light extinction coefficient values（LEC） ranged between 3.1 and 10.1 cm.The ranges of inorganic nutrients（μmol/dm^3） viz.,nitrate,nitrite,phosphate and silicate were 10.1-23.4,1.2-8.9,0.2-3.1 and 55-125,respectively.The ranges of Chlorophyll a（μg/dm-3） values was 2.0-7.5.Presently,124 phytoplankton species representing different classes viz：Bacillariophyceae（77）,Dinophyceae（19）,Cyanophyceae（15）,Chlorophyceae（10） and Chrysophyceae（3） were recorded.The phytoplankton cell abundance varied from 0.290 to 111.662 cells/cm-3,with peak diversity（3.38 bits/ind.） during summer season.The maximum abundance was found during summer season coinciding with the stable hydrographical conditions.The seasonal distribution and abundance of phytoplankton are discussed in relation to hydrographical parameters.Canonical Correspondence Analysis（CCA） was applied in this paper for discriminating environmental factors having effect on phytoplankton community at species level.Coleroon coastal water is subjected to long term fluctuations in physico-chemical parameters depending upon the seasonal tidal amplitude and freshwater influx resulting in a continuous exchange of organic,inorganic,plant and animal matters.展开更多
基金The Chinese Academy of Sciences Research Fellowship for International Young Researchers to M Rthe Knowledge Innovation Project of the Chinese Academy of Sciences to J S under contract Nos KZCX2-YW-QN-205 and KZCX2-YW-213-2+1 种基金the National High Technology Research and Development Program of China (863 Program) under contract No.2006AA09Z179the Ocean Public Welfare Scientific Research Project to J S under contract No. 201005015-1
文摘Three species, Bathynomus decemspinosus, B. doederleini and B. kensleyi （Crustacea, Isopoda, Cirolanidae）, are reported for the first time from the Parangipettai coastal waters, Southeast coast of India. Several Trilasmis （Temnaspis） tridens （Cirripedia Thoracica, Lepadomorpha） were attached to the pleopods of some individuals. So, five bathynomid species are currently reported from India.
基金The Knowledge Innovation Project of the Chinese Academy of sciences under contract Nos KZCX2-YW-QN-205 and KZCX2-YW-213-2 to Sun Junsupported by Chinese Academy of Sciences Research Fellowship for International Young Researchers to M R
文摘The results of an investigation carried out during June 2005 to May 2007 on physico-chemical parameters,species composition and community structure of phytoplankton including Chlorophyll a（Chl-a） at the Coleroon coastal waters（Southeast coast of India） are reported.Air and surface water temperatures（℃） varied from 25.1 to 30.1 and from 24.5 to 28.5 respectively.Salinity values varied from 6 to 28.5 and the pH ranged between 7.0 and 8.3.Variation in dissolved oxygen content was from 3.1 to 7.5 mg/dm^3 while the light extinction coefficient values（LEC） ranged between 3.1 and 10.1 cm.The ranges of inorganic nutrients（μmol/dm^3） viz.,nitrate,nitrite,phosphate and silicate were 10.1-23.4,1.2-8.9,0.2-3.1 and 55-125,respectively.The ranges of Chlorophyll a（μg/dm-3） values was 2.0-7.5.Presently,124 phytoplankton species representing different classes viz：Bacillariophyceae（77）,Dinophyceae（19）,Cyanophyceae（15）,Chlorophyceae（10） and Chrysophyceae（3） were recorded.The phytoplankton cell abundance varied from 0.290 to 111.662 cells/cm-3,with peak diversity（3.38 bits/ind.） during summer season.The maximum abundance was found during summer season coinciding with the stable hydrographical conditions.The seasonal distribution and abundance of phytoplankton are discussed in relation to hydrographical parameters.Canonical Correspondence Analysis（CCA） was applied in this paper for discriminating environmental factors having effect on phytoplankton community at species level.Coleroon coastal water is subjected to long term fluctuations in physico-chemical parameters depending upon the seasonal tidal amplitude and freshwater influx resulting in a continuous exchange of organic,inorganic,plant and animal matters.
