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Kadam S.S.,N B Mehta Science College | Tiwari L.R.,Maharshi Dayanand College Parel
Indian Journal of Geo-Marine Sciences | Year: 2015

In the present study total five stations were selected for collection of zooplankton (copepods) out of these, 3 stations were within the creek and 2 stations were in offshore region. Copepods formed the most dominant group of zooplankton sample at all the stations, at station 1 their population was in the range of 5845 to 54472 / 100m3(av.36882.8 / 100m3), at station 2 12166 to 65700 / 100m3(av. of 32472.38 /100m3),at station 3 17263 to 67652/ 100m3(av.35385.2 /100m3), at station 4 12064 to 48990/ 100m3(av. 31924.73/ 100m3) and at station 5 7060 to 41528 / 100m3(av.25657.47/100m3). Species composition of copepods was evaluated based on analyses of sample from station 1 and 5, representing the outer and interior zone respectively. A total of 61 species belonging to the 20 genera and 11 families at station 1 and 48 species belongs to 15 genera and 8 families at station 5. Calanoida became the most dominant group in copepod population. © 2015, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.

Kadam S.S.,Nbmehta Science College Bordi | Tiwari L.R.,Maharshi Dayanand College Parel
Indian Journal of Marine Sciences | Year: 2011

Diversity of phytoplankton and water quality of Dahanu creek was studied during November 2008 and October 2009. Physicochemical parameters indicated variations in depth, pH, temperature. DO, BOD, salinity, nitrite, nitrate, ammonium nitrate, phosphate etc. Total 52 genera of phytoplankton were observed during the study period comprising diatoms, dinoflagellates and other algae. Coscinodicuss, Rhizosolenia, Biddulphia, Melosera, Bacillaria, Isthmia, and Gyrosigma were dominated among the phytoplankton community. Diversity index of phytoplankton ranged from 2.61 to 6.37. Dahanu creek maintained fairly high concentration of chlorophyll a, ranging between 0.96 to 7.65 (average 3.30). Maximum value of chlorophyll a was recorded at stn.1 from the bottom water during June 2009 which coincided with the highest cell count of phytoplankton total 758 phytoplankton recorded for that station. This was also associated the boom of coscinodicuss.There was gradual increases in chlorophyll a from creek area. Distribution of phaeophytin ranged from 0.65 to 4.49 (average 1.94) and it was comparable with chlorophyll a. However Station 1-3 maintained higher value of chlorophyll a than the phaeophytin while the area of station 4-5 showed low concentration of chlorophyll a and phaeophytin. Dahanu creek consists of rich and divers phytoplankton community.

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