ID: 57547
Title: Dynamics of road traffic noise in Bhadrak city, India
Author: Bijay Kumar Swain, Santosh Kumar Panda, Shreerup Goswami
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Road traffic, Noise pollution, noise descriptors, health survey, Bhadrak
Abstract: Road traffic noise assessed in 13 different squares of major intersection points in Bhadrak city during four different specified times i.e. 7-10 a m, 11 am-2 Pm, 3-6 pm and 7-10 pm. Road traffic was found to be the most important source of community noise at the studied sites. The noise levels of all the 13 squares were found to be beyond the permissible limit [70 dB (A)] during day time. Leq (equivalent noise level) values ranged from 93.4 to 100.5; 91.5 to 100.6; 95.1 to 107.3 and 97.3 to 106.3 dB during 7-10 a m, 11 a m - 2 p m., 3-6 p m and 7-10 p m respectively. LNP values range from 115.7 to 127.7; 114.2 to 129.8; 118.2 to 138.2 and 120.7 to 135 dB, while TNI values range from 134.3 to 154.7; 130.7 to 157.9; 136.7 to 168.2 and 137.2 to 165 dB during 7-10 a m, 11 am - 2pm, 3-6 pm and 7-10 pm respectively. Reprehensibly, even minimum LNP and TNI values are more than 114 and 130 dB respectively. Analysis of variance also computed for investigated squares at the peak hour e.e 7-10 pm to infer the level of significance. The observed value of F (0.47) was less than the tabulated values and was not significant at both 5 and 1% levels of significance. Thus, the noise levels of different squares did not differ significantly at their peak hours. A preliminary public health survey carried out based on questionnaire method amongst 202 local inhabitants reveal the degree of annoyance due to road traffic noise.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57546
Title: Studies on abundance of zooplanktons in lakes of Mysore, India
Author: N Savitha, Sadanand M Yamakanamardi
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Rotifer, Cladoceran, Copepod, Ostracod, Zooplankton
Abstract: This is the final comprehensive ecological study on the abundance of zooplankton in Kalale, Alanahalli and Dalvoy lakes of Mysore. The abundance of zooplankton as well as their relation with physico-chemical parameters was analyzed, every month in these lakes from June 2008-May 2010. The mean abundance of Rotifer (281 Org l-1), Cladocerans (27 Orgl-1) and total abundance of zooplankton (343 Orgl-1) were more and significantly different in Dalvoy lake; whereas, in Kalale lake the mean abundance of Rotifer (19 Org l-1), Cladocerans (3 Orgl-1), and total abundance of zooplankton (79 Org l-1), and in Alanahalli lake the mean abundance of Rotifer (84 Org l-1), Cladocerans (9 Orgl-1) and total abundance of zooplankton (149 Org l-1) were significantly less. However, the abundance of copepods and Ostracods was similar in all the three lakes studied. The water bodies of Kalale lake were less polluted when compared to Alanahalli and Dalvoy lakes. The increases in conductivity, Chl a, turbidity, phosphate, carbon-di-oxide and total anions in Alanahalli and Dalvoy lakes may be attributed to the various anthropogenic activities in the catchment areas. Interrelationships between zooplankton variables and physico-chemical parameters were calculated using Pearson ' s correlation co-efficient (r) which revealed (25) significant (P<0.05) relationships (More (11) in Dalvoy lake and moderate (7) in Alanahalli and Kalale lakes). The stepwise multiple regression analysis (r2) showed out of 21 physico-chemical parameters studied, as many as 12 were positively controlling the abundance of zooplankton, where as the phosphate and chloride were negatively controlling the total abundance of zooplankton and the abundance of ostracods respectively. The results obtained have been discussed in the light of the present literature available in the field of aquatic microbial ecology.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57545
Title: Impact of dyeing industry effluent on germination and growth of pea (Pisum sativum)
Author: Piyush Malaviya, Rajesh Hali, Neeru Sharma
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Dye industry, effluent, germination, Pisum sativum
Abstract: Dye industry effluent was analyzed for physico-chemical characteristics and its impact on germination and growth behaviour of Pea (Pisum sativum). The 100% effluent showed high pH (10.3) and TDS (1088 mg l-1). The germination parameters included percent germination, delay index, speed of germination, peak value and germination period while growth parameters comprised of root and shoot length, root and shoot weight, root-shoot ratio and number of stipules. The study showed the maximum values of positive germination parameters viz, speed of germination (7.85), peak value (3.28), germination index (123.87) and all growth parameters at 20% effluent concentration while the values of negative germination parameters viz. delay index (-0.14) and percent inhibition (-8.34) were found to be minimum at 20% effluent concentration. The study demonstrated that a lower concentrations the dyeing industry effluent caused a positive impact on germination and growth of Pisum sativum.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57544
Title: Impact of mine waste dumps on growth and biomass of economically important crops
Author: Narayanan Mathiyazhagen, Devarajan Natarajan
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Mine waste, heavy metals, edible crops
Abstract: The present study aimed to investigate the effect of magnesite and bauxite waste dumps on growth and biochemical parameters of some edible and economically important plants such as Vigna radiata, V. mungo, V. unguiculata, Eleusina coracana, Cajanus cajan, Pennisetum glaucum, Macrotyloma uniflorum, Oryza sativa, Sorghum bicolour, Sesamum indicum, Ricinus communis, Brassica juncea, Gossypium hirsutum and Jatropha curcas.The growth rate of all the crops was observed in the range of 75 to 100% in magnesite and 15 to 100% in bauxite mine soil. The moisture content of roots and shoots of all the crops were in the range of 24 to 77, 20 to 88% and 42 to 87, 59 to 88% respectively. The height of the crops was in the range of 2.6 to 48 cm in magnesite soil and 3 to 33 cm in bauxite soil. Thus the study shows that both mine soils reflects some physical and biomolecule impact on selected crops.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57543
Title: Bioaccumulation potential of Aspergillus niger and Aspergillus flavus for removal of heavy metals from paper mill effluent
Author: B Thippeswamy, C K Shivakumar, M Krishnappa
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Bioaccumulation, heavy metals, paper mill effluent, Aspergillus niger, Aspergillus flavus
Abstract: In the present study Aspergillus niger and Aspergillus flavus isolated from paper mill effluent showed tolerance and accumulation of toxic metals Ni, Zn, Cd, Pb, Cr and Cu from synthetic medium and paper mill effluent. Physico-chemical and heavy metals characterization of industrially treated paper mill effluent showed insignificant reduction in BOD, hardness, TDS and heavy metals as compared to permissible limits of BIS and WHO. A. niger and A. flavus were treated with synthetic medium containing 100-1000 mg l-1 of six heavy metals. A. niger was able to tolerate and grow in 1000 mg l-1 Pb, 500 mg l-1 Cu, 250 mg l-1 Zn and 100 mg l-1 Cr, Ni respectively. No growth of A. niger was observed in 100 mg l-1 of Cd. A. flavus was capable to tolerate and grow in 1000 mg l-1 Pb, Zn and Ni, 100 mg l-1 Cu. A. flavus growth was completely inhibited in 100mg l-1 of Cd and Cr. The Cd, Zn, Cu and Pb reduction were found significant (p<0.05) in the paper effluent inoculated with A. niger and A. flavus biomass compared to industrial treated effluent. A. niger and A. flavus accumulated maximum of Pb (75.82%) followed by Zn (49.40%) > Cu (45.34%) > Ni (25.20%), while only 41% Cr was accumulated by A. niger from 100 mg l-1 of Cr solution.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57542
Title: Effects of cadmium chloride on oxygen consumption and gill morphology of Indian flying barb, Esomus danricus
Author: Suchismita Das, Abhik Gupta
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Cadmium chloride, oxygen consumption, gill histology, Esomus danricus
Abstract: Effects of three sub lethal concentrations of cadmium chloride (0.636, 0.063 and 0.006 mg l-1) on oxygen consumption and gill morphology in Indian flying barb, Esomus danricus (Hamilton-Buchanan), a teleost fish, were studied. When compared to control, 0.636 mg l-1 of cadmium chloride after 7, 14, 21 and 28 day exposures showed a significant decline in rates of oxygen consumption at 32.98, 28.40, 23.88 and 21.69 ml hr-1100g-1of tissue, respectively; while 0.063 mg l-1 of cadmium chloride for the same exposure durations showed a significant decline in rates of oxygen consumption at 34. 28, 29.30, 28.05 and 26.47 ml hr-1 100 g-1 of tissue, respectively. However, significant decline in the rate of oxygen consumption at 0.006 mg l-1 of cadmium chloride could be observed from 21st day of exposure. Gill tissue showed various histopathological changes including epithelial lifting, hyperplasia, mucous secretion, marked leucocyte infiltration in the epithelium after 28 days of cadmium chloride exposure.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57541
Title: Physiological attributes of lichen, Phaeophyscia hispidula in heavy metal rich sites of Dehra Dun, India
Author: Vertika Shukla, D K Upreti, D K Patel
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Biomonitoring, metal tolerance, stress physiology, vehicular activity, lichen
Abstract: Paheophyscia hispidula (Ach.) Moberg, foliose lichen is widespread in Garhwal Himalayas and grows luxuriantly on different substratum in polluted as well as non polluted sites, where no other macrolichens are able to colonize. The elemental concentration and biochemical parameters in P. hispidula collected from Dehra Dun city were analyzed to assess its tolerance to heavy metals. The major source of pollution in the city were analyzed to assess its tolerance to heavy metals. The major source of pollution in the city is automobiles. Among the biochemical parameters protein was significantly and negatively correlated with pigment concentrations (r = -0.3838 (Chl.b); -0.5809 (Carotenoid); -0.5034 (OD)) however it is significantly positively correlated with Cd (r=0.6822; P<0.01). Among heavy metals, Cd was negatively correlated with Cu (r = -0.4639), Fe (r = -0.2676), and Zn (r=-0.0549). It was observed that the chlorophyll and protein content increased parallel to the level of metallic pollutants indicating the mechanism of stress tolerance in P. hispidula. The study shows that P. hispidula is tolerant to inorganic pollutin and a useful tool for biomonitoring of air quality in the Himalayan region.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57540
Title: Comparative study of heavy metals in selected mangroves of Sundarban ecosystem, India
Author: Anirban Akhand, Abhra Chanda, Sachinandan Dutta, Sugata Hazra, Pranabes Sanyal
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Sundarban ecosystem, heavy metals, mangroves, absorption
Abstract: Accumulation and partitioning of eight heavy metals Cr, Pb, Zn, Cd, Ni, Cu, Co and Fe were studied in the root, stem and leaf of mangrove species (Sonneratia caseolaris, Acanthus ilicifolius and Excoecaria agallocha) for compasion and in mangrove sediments for calculation of bio concentration factor (BFC) in Sundarban India. Magnitude of Fe was found highest in the sediments (35371.71 mg kg-1) and plant parts of the three species (a maximum of 11428.0 mg kg-1 in the root of S. caseolaris). For other heavy metals, plants showed exclusion and selection mainly based on utilization, regardless of their level in the sediments. In most of the cases significant variation of absorption was found between the three species (F=11.48 to 157.37; p<0.001) and between their plant parts (F=10.98 to 338.03; p<0.001). S. caseolaris was found to be a less potential heavy metal accumulator than the other two species, except for Fe and Zn in the root. Irrespective of the magnitude of the heavy metals, other species showed significant correlations (r=0.509 to 0.961; p<0.001) between heavy metal accumulations, exclusively due to chemical reason, whereas S. caseolaris showed significant correlations (r=0.554 to 0.926; p<0.001) between each and every heavy metal, which signifies similar mode of absorption pattern regardless of their utilization. This nonbiased manner of heavy metal accumulation pattern may help the species to withstand in the polluted areas.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57539
Title: Some ecological aspects and potential threats to an intertidal gastropod, Umbonium vestiarium
Author: S Sivadas, B Ingole, A Sen
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Ecology, mining impact, Umbonium vestiarium, polymorphism, Kalbadevi bay
Abstract: Kalbadevi Bay in Ratgnairi has been identified as potential site for placer mining along the west coast of India. Since, U. vestiarium is a keystone species of the region; study on some ecological aspect was carried. The paper also discusses the possible impact of beach sand mining and other threats to this ecologically important gastropod. Seasonal sampling was carried in 2004-2005 at 13 transects by quadrate method. U. vestiarium was restricted to mid and low tide zone of Station 1-3 and 8-10 located at the north and south ends of the beach. Abundance was highest at Station 10 MT (16 to 12388 ind m-2). Based on the size-frequency, it may be considered that U. vestiarium like other tropical fauna recruit during monsoon. Eleven different colour patterns of U. vestiarium were observed. However, average individual size was larger in the samples collected from the north (stn. 1-3) end of the beach. The fastidious nature and sporadic distribution of U. vestiarium make them vulnerable to natural and anthropogenic disturbance.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57538
Title: Rhizobacterial population density and nitrogen fixation in seagrass community of Gulf of Mannar, India
Author: S Raja, T Thangaradjou, K Sivakumar, L Kannan
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Rhizosphere bacteria, nitrogen fixation, seagrasses, Gulf of Mannar
Abstract: Seagrass rhizosphere generally supports high bacterial population density which plays a major role in determining the nutrient cycles of the sea. Higher densities of total heterotrophic bacteria (26.3 x 106 CFU g-1), nitrogen fixing (27.3 x 103CFU g-1), ammonifying (44.66 x 106 MPN g-1) and nitrifying bacteria (42.33 x 106MPN g-1) have been registered in the seagrass areas than the non seagrass area. In particular, all these rhizosphere microbial population was higher in Thalassia hemprichii. The rates of nitrogen fixation was recorded in the different species of seagrasses such as Enhalus acoroides (1.166 n mol g-1d-1), Halophila ovalis (0.166 n mol g-1d-1). Thalassia hemprichii (18.5 n mol g-1d-1, Cymodocea serrulata (10.5 n mol g-1d-1). Halodule uninervis (5.375 N mol g-1d-1) and Syringodium isoetifolium (0.666 n mol g-1d-1) using gas chromatography. The average nitrogen fixation by the seagrasses of Gulf of Mannar alone was estimated to be 7640.58 n mol m-2 d-1 and the contributions from the rhizosphere microbes will increase the quantity to many fold.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57537
Title: Role of nitric oxide in cadmium-induced stress on growth, photosynthetic components and yield of Brassica napus L.
Author: Shalini Jhanji, R C Setia, Navjyot Kaur, Parminder Kaur, Neelam Setia
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Cadmium, Sodium nitroprusside, nitric oxide, Brassica napus, Growth
Abstract: Experiments were carried out to study the effect of cadmium (Cd) and exogenous nitric oxide (NO) on growth, photosynthetic attributes, yield components and structural features of Brassica napus L. (cv. GSL 1). Cadmium in the growth medium at different levels (1,2 and 4 Mm) retarded plant growth viz. shoot (27%) and root (51%) length as compared to control. The accumulation of total dry matter and its partitioning to different plant parts was also reduced by 31% due to Cd toxicity. Photosynthetic parameters viz., leaf area plant-1 (51%), total Chl (27%), Chl a / Chl b ratio (22%) and Hill reaction activity of chloroplasts (42%) were greatly reduced in Cd-treated plants. Cd treatments adversely affected various yield parameters viz., number of branches (23) and siliquae plant-1(246), seed number siliqua-1 (10.3), 1000-seed weight (2.30 g) and seed yield plant-1 (7.09 g). Different Cd treatments also suppressed the differentiation of various tissues like vessels in the root with a maximum inhibition caused by 4 m M Cd. Exogenous application of nitric oxide (NO) improved the various morpho-physiological and photosynthetic parameters in control as well as Cd-treated plants.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57536
Title: Kinetics of fungal extracellular alpha-amylase from Fusarium solani immobilized in calcium alginate beads
Author: Devendra Kumar, M Muthukumar, Neelima Garg
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Calcium alginate, immobilization, alpha-amylase, Fusarium solani, Mango kernel
Abstract: Extracellular alpha - amylase mass produced by Fusarium solani using mango kernel as substrate was immobilized in calcium alginate beads through entrapment technique. Maximum enzyme immobilization efficiency was achieved in 2 mm size beads formed by 6.5% (w/v) of sodium alginate in 2% (w/v) calcium chloride. The catalytic properties of the immobilized alpha-amylase were compared with that of free enzyme (soluble). The activity yield of the immobilized enzyme was 81% of the free enzyme. The immobilized enzyme showed optimum activity at pH 4.5-6.0 and temperature 400C, in contrast to the free enzyme at 5.5 and 300C, respectively. Thermal stability of the immobilized enzyme was found to be more than the free enzyme over a longer time interval. The immobilized enzyme retained activity upto 20% of optimum even after 180 min. While the free enzyme lost its 80% activity after 60 min and lost total activity down to zero by 120 min. The kinetic constants, viz., KM (Michaelis constant), Vmax and activation energy were affected by immobilization. However, the immobilized alpha- amylase in calcium alginate beads supports its long term storage which was immense industrial applications.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57535
Title: Zooplankton population in relation to physico-chemical parameters of Lal Diggi pond in Aligarh, India
Author: Uzma Ahmad, Saltanat Parveen, Hesham R Abdel Mola, Habeeba A Kabir, Altaf H Ganai
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Physico-chemical parameters, zooplankton, pond
Abstract: Physico-chemical parameters and zooplankton were assessed Lal Diggi pond from January to December, 2008. Four groups of zooplankton were recorded. Rotifera constituted the main dominant group in this pond contributing 44.89% of the total zooplankton population followed by Cladocera (30.41%), Copepoda (15.51%) and Ostracoda (4.68%). The highest density of zooplankton was recorded during Januarya and February being 197 and 182 no l-1 respectively, while the lowest density was recorded during May and June being 64 n l-1 each could be due to the negative and significant value of correlation between zooplankton and water temperature (r = -0.700). These data is supported by similarity indices which recorded high values during January and February while the lowest values recorded during June and July.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57534
Title: Effect of available nutrients on yield and quality of pear fruit bartlett in Kashmir valley India
Author: M A Dar, J A Wani, S K Raina, M Y Bhat, M A Dar
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Kashmir valley, Nutrients, pear , cultivor ' Bartlett '
Abstract: Pear is one of the most important commercial crops grown in the Kashmir valley of India. A study was conducted during 2008 to find ouit the effect of available nutrients on yeild and quality parameters of pear cultivar "Bartlett" which revealed that nitrogen, phosphorus and potassium echibited significant and positive relationship with fruit length (0.882, 0.856, and 0.482 mm, respectively), diameter (0.869, 0.794 and 0.458 mm, respectively), weight (0.876, 0.825 and 0.439 g, respectively), volume (0.908, 0.806 and 0.404, Cm3 respectively) and yield (0.908, 0.764 and 0.702 kg tree-1, respectively) however, only nitrogen and phosphorus showed similar relationship with total sugars (0.833 and 0.838% respectively). The calcium indicated significant and negative relationship with fruit diameter (-0.433) and yield (-0.589), while as it showed significant and positive correlation with fruit firmness (0.442) only. The sulphur revealed significant and positive relationship with fruit length (0.440), diameter (0.434), TSS (0.482) and yield (0.729) whereas zinc, copper, iron and manganese exhibited significant and positive relationship with fruit length (0.889, 793, 0.671 and 0.619, respectively), diameter (0.875, 0.807, 0.653 and 0.576, respectively) weight (0.881, 0.784, 0.669 and 0.615, respectively), volume (0.885, 0.832, 0.692 and 0.572, respectively) TSS (0.858, 0.761, 0.735 and 0.609, respectively), total sugars (0.853, 0.890, 0.705 and 0.517, respectively) and yield (0.777, 0.618, 0.789 and 0.701, respectively). It is therefore suggested that nutrients have effect on quality and yield of pear fruits.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57533
Title: Copepod population in Vellar estuary, Parangipettai coast in relation to environmental conditions
Author: P Santhanam, P Perumal, S Ananth, A Shenbaga Devi
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 6, November 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Bay of Bengal, Vellar estuary, Nutrients, copepods, diversity
Abstract: Distribution and abundance of copepods were studied in relation to environmental conditions at two different ecosystems viz: Neritic (Bay of Bengal) and estuarine (Vellar estuary) of Parangipettai coast from September, 1998 to August 2000. Over the study period, total 85 species of copepods were reported. Among these, the calanoid copepods constituted the major component with 63.52% followed by cyclopoids (29.41%) and harpacticoids (7.05%). The copepods population density was found to be high (2, 53, 000 org l-1) in estuarine water, while the species diversity was higher (5.47) in neritic water. The observed spatio-temporal variations in the population density and species diversity of copepods were more related to the environmental state of respective study area.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None