ID: 56917
Title: Appearnace and characteristics of major phytoplankton species based on long-term monitoring datasets in Southern sea of Korea
Author: Young Sik Lee, Jin Young Kim
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Bloom-forming phytoplankton, Estuary, heavy rainfall, mechanism, water quality
Abstract: To understand the mechanism of phytoplankton bloom forming, we investigated the relationship between severl species and water quality factors using a long-term monitoring datasets from 1996 to 2003. The seven sites at this study were classified into four groups by phytoplankton species or water quality datasets and the species for phytoplankton bloom forming seems to be mainly influenced by the water quality or surrounding water conditions. E. gymnastics and P. minimum were observed for the longest time period from April to September, and C. polykrikoides shortest time period from summer to autumn. E. gymnastica was observed across the widest temperature range (14-270C), and C. polykrikoides narrowest temperature range (20-280C). Chaetoceros spp. was observed over the narrowest salinity range (22-33 ppt), and E. gymnastica, P. minimum, H. akashiwo wide salinity range (14-34 ppt). The main reasons for the formation of chaetoceros spp and S. costatum blooms seems to be fresh water input through forest and fields by heavy rainfall events. Thalassiosira spp. seems to grow well in conditions of fresh water input and/or in eutrophicated areas with salinities > 20 ppt and water temperatures > 170C. C. furca seems to grow well in sea area that are affected by inflows of domestic and industrial wastewater and by inflows of freshwater with domestic and industrial wastewater, rather than only freshwater input, after May when water temperatures are higher than 180C. E. gymnastica, H akashiwo, P minimum, and P. triestium seem to grow well in eutrophicated sea areas where nutrient levels are high nad wehre domestic and industrial wastewater flow are abundant. C. polykrikoides blooms seem to be due to suitable seawater input from off sea areas, and freshwater after heavy rainfall that has high nitrogen concentration.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56916
Title: Determination of incoming solar radiation in major tree species in Turkey
Author: Osman Yalcin Yilamz, Orhan Sevgi, Aytha Koc
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Solar radiation modeling, GIS, Forest tree species
Abstract: Light requirements and spatial distribution of major forest tree species in Turkey hasn ' t been analyzed yet. Continuous surface solar radiation data, especially at mountainous - forested areas, are needed to put forward this relationship between forest tree species and solar radiation. To achieve this, GIS-based modeling of solar radiation is one of the methods used in rangelands to estimate continuous surface solar radiation. Therefore, mean monthly and annual total global solar radiation maps of whole Turkey were computed spatially using GRASS GIS software "r.sun" model under clear-sky (cloudless) conditions. 147498 pure forest stand point based data were used in the study for calculating mean global solar radiation values of all the major forest tree species of Turkey. Beech had the lowest annual mean total global solar radiation value of 1654.87 kWh m-2, whereas juniper had the highest value of 1928.89 kWh m-2. The rank order of tree species according to the mean mostly and annual told global solar radiation vlaues, using a confidence level of p<0.05, was as follows: Beech< Spruce< Fir species < Oak species < Scotch pine< Red pine < Cedar< Juniper. The monthly and annual solar radiation values of sitesand light requirements of forest trees ranked similarly.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56915
Title: Effect of some plant growth regulators on lindane and alpha-endosulfan toxicity to Brassica chinensis
Author: Waraporn Chouychai
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Auxin, Gibberellin, Endosulfan, Endosulfan, Lindane, B. chinensis
Abstract: The effect of indolebutyric acid (IBA) and gibberellic acid (GA3), to alleviate the organochlorine phytotoxicity were studied in Brassica chinensis. Presence of organochlorien decreased Brassica chinensis seedlings growth in contaminated alkaline soil. One mg l-1IBA could enhance 14 and 26% shoot and root length of B. chinensis seedlings grown at 40 mg kg-1 lindane contaminated soil, respectively. Ten mg l-1 IBA also increased 80 and 40% root fresh weight of seedling grown in 40 mg kg 1lindane and alpha-endosulfan contaminated soils, respectively. However, IBA had no effect on shoot and root length of seedlings grown in endosulfan contaminated soil. On the other hand, 10 mg l-1 GA3 only increased 80% of shoot and root fresh weigh of B. chinensis in 40 mg kg-1 endosulfan contaminated soil. External auxin addition could increase B. chinensis growth in lindane more than endosulfan contaminated soil. External auxin addition could increase B. chinensis growth in lindane more than endosulfan contaminated soil. External gibberellin was less effective than external auxin to increase B. chinensis growth in organochlorine contaminated soil. There is possibility that auxin could decreas organochlorine phytotoxicity in plants and hence can be useful for organochlorine phytoremediation.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56914
Title: Evaluation of the estrogenic effects of Bisphenol-A on male freshwater prawn Macrobrachium asperulum
Author: Kai-Hsiang Huang, Yuh-Wen Chiu, Shu-Yin Wang, Hon-Cheng Chen, Da-Ji Huang
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Biomonitoring species, Bisphenol-A, Endocrine disrupter, Macrobrachium asperulum, Bitellogenin
Abstract: Bisphenol-A (BPA), a known endocrine-disrupting chemical that is distributed world wide, is extensively employed in industry, dentistry and consumer household products. This study was conducted to explore the estrogenic effecs of BPA on the male freshwater prawn, Macrobrachium asperulum, by examining the daily survival rate, molting frequency, hepatosomatic index (HSI), and levels of vitellogenin-like protein. Results revealed that BPA can elicit the expression of vitellogenin-like protein (0.09 and 0.09 ?gP (mg protein)-1, respectively) in male organims exposed to 0.1 and 1 ng l-1 BPA at day 7. Moreover, prawns were perceived to be sensitive to estrogenic compounds. Hence, it can be concluded that M. asperulum can be used as a species for biomonitoring, and levels of vitellogenin-like protein in males are a useful biomaker for detecting estrogenic contaminations.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56913
Title: Effect of a non steroidal tamoxifen on the gonad and sex differentiation in Nile tilapia, Oreochromis niloticus
Author: Ruchi Singh, A K Singh, Madhu Tripathi
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Tamoxifen, Sex differentiation, Masculization, gonadal structure, Oreochromis niloticus
Abstract: The effect of different doses of anti-estrogenic chemical was studied in a cichlid Oreochromis niloticus on mortality, growth, sexual development and sex differentiation. Percent mortality (5, 10 and 10) appeared to be dose-dependent. All groups of tamoxifen (TA) treated fishes exhibited singificant growth as compared to the controlled fishes. Immatuer fishes treated with TA at 200 ? gl-1, showed lower gonado-somatic-index (GSI) (male 0.137; female 0.118) than control group (male 0.138; female 0.122) of fishes. Ovarian and testicular differentiation was adjudged by the appearance of the ovarian cavity (ovary) and the efferent (sperm) duct (testis), respectively. Sex and sexual maturity of individual fishes were detemined using standard histological method. Tamoxifen treatment to the fry (yolk sac absorbed stage) of Oreochromis niloticus in the dose of 200 ? gl-1for 60 days produced 90% males and 1% intersex population. Results suggested masculinizing action of tamoxifen reversing the sex of genetic female tilapia.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56912
Title: Floristic diversity of regenerated tree species in Dipterocarp forests in Western Ghats of Karnataka, India
Author: A G Devi Prasad, Nageeb A . Al-Sagheer
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Floristic diversity, Dipeterocarp forest, Important value index, Similarity index, Species richness
Abstract: The research was focused on exploring the structure, diversity and form of regeneration process of the Dipterocarp forests in Western Ghats in relation to environmental factors. Eight populations in the distribution range of Dipterocarp forests were selected. In each population 32 plots of 2m x 2m were laid down randomly. A total of 1243 seedlings < 10 cm dbh (diameter at breast height) belongign to 99 species and 48 families were recorded. The number of regenerated tree species was found to be high in the populations of Mudigere (40), Sakleshpura (40) and Makuta (39) , which are characterized by favorable locality factors and lower disturbances. The highest similarity index in species composition was recorded between the populations of Sampaje in Kodagu district and Gundya in Dakshina Kannada (60%) whereas the lowest similarity index was observed between the population of Sringeri in Chikmagalore and Sampaje (53%) and Gundya and Makuta (35%) in Kodagu distrit. Dipterocarpus indicus was found to be dominant among the regenerated tree species in all the sites studied except Gundy and Sampaje. The frequencies of regeneration classes (seedlings, saplings, poles and adult trees) were shaped as inverse J curve indicating the normal regeneation pattern under the present disturbance. The average disturbane of litter collection, grazing, fire, weeds and canopy opening were significant among different populations (P< 0.05). Negative correlation was observed between disturbance and species richness, number of individuals and density.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56911
Title: Studies on genetic divergence among Indian varieties of a spice herb, Coriandrum sativum
Author: S K Singh, R K Kakani, R S Meena, Anjly Pancholy, Rakesh Pathak, Aparna Raturi
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Coriandrum sativum, Genetic diversity, rDNA diversity, DNA bar coding
Abstract: Coriander (Coriandrum sativum L) is an annual spice herb that belongs to umbel family Apiaceae with diversified uses. We investigated the extent of variability among 22 Indian varieties of corinader using phenotypic and genetic markers. Multilocus gentyping by nine RAPD primers detected an average of intraspecific variations amounting to 66.18% polymorphism banding patterns. Analysis of molecular variance indicated that a greater proportion of total genetic variation exists within population (98%) rather than among populations (2%). Higher values of Nei ' s gene diversity (h) and Shannon Information Index (i) and genetic distnce analysis validate wider genetic diversity among Indian corander varieties. Besides total internal transcribed spacer (ITS) length variations and single nucleotide polymorphisms, insertions/ deletions (INDELS) were detected at seven sites in ITS-1 region. Multiple sequence alignment of 12 sequenced varieties revealed cent per cent identities of 5.8 S gene region (162 bp) that validates it sonserved nature. Multiple sequence alignment of ITS-1 region may be of phylogenetic significance in distinguishing and cataloguing of coriander germplasm. The representative sequences of each subgroup and all distinct varieties of RAPD clusters have been sumitted to NCBI database and assigned Gen Accessin numbers HQ 377194-377205. The measures of relative genetic distances among the varieties of coriander did not completely correlate geographical places of their development . Eventually the knowledge of their genetic relationships and DNA bar coding will be of significance.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56910
Title: Studies on antimicrobial efficacy of medicianl tuberous shrub Talinum cuneifolium
Author: N Savithramma, S Ankanna, M Linga Rao, J Saradvathi
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Antimicrobial efficacy, Talinum cuneifolium, Root tuber, Medicinal plant
Abstract: Talinum cuneifolium (Vahl.) Wild, an errect shrub with subterranian tuber (Portulacaceae) is endowed with wide range of pharmacological activities. The antimicrobial efficacy of the plant is evaluated against three bacteria and two fungal species by disc diffusion method. Preliminary phytochemical screening was carried out among hexane, ethylacetate, methanolic extracs of leaf and root tuber for different potent chemicals. The leaf methanolic extract of T. cuneifolium showed maximum effect on the growth of Proteus (25.8 mm) followed by Bacillus (24.62 mm) and E.coli (19.42 mm). The tuberous methanolic extract of T. cuneifolium showed maximum effect on growth of Proteus (28.15mm) followed by Bacillus (26.88 mm) and E. coli (24.51 mm). The Gram-positive bacterial strains (Bacillus) were more susceptible to the extractions of T. cuneifolium as compared to Gram-negative bacteria (E.coli, Pseudomonas aeruginosa, Proteus vulgaris and Klebsiella pneumoneia). The antifungal activity of selected plant leaf and root tubers exhibit pronounced activity against Candida albicans rather than Aspergillus niger. These studies showed that the methanolic extracts of T.cuneifolium plant parts were certainly much better and powerful. This may be due to the better solubility of the action components in organic solvent.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56909
Title: Correlation of total heterotrophic bacterial load in relation with hydrographical features of Pazhayakayal estuary, Tuticorin, India
Author: J Rani, Anita Kannagi, V Shanthi
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Pazhayakayal estuary, Hydrographical features, Heterotrophic bacteria, THB load
Abstract: An investigation was made on total heterotrophic bacterial (THB) load in relation with hydrographical features of Pazhayakayal estuary, Tuticorn, from July 2009 to June 2010. The water temperature (25 to 320C), pH (7 to 10), and salinity (0% to 35.7%) were maximum during summer season (April-June) and minimum during monsoon season (October-December). The Dissolved oxygen (DO) varied from 0.2 to 9.95 mg l-1. The THB load was high (42.0 x 10-7 cfu ml-1) during monsoon season and low (1.2 x 10-7 cfu ml-1) during summer. The correlation with insignificant between temperature, pH and THB load, however THB load was negatively correlated with salinity. Almost in all the stations (I-VI), THB load were found to be maximum (40.0 x 10-7, 36.0 x 10-7, 30.0 x 10-7, 36.0 x 10-7,42.0 x10 x 10-7 and 29.6 x 10-7cfu ml-1) during monsoon season might be due to the bulk rainfall and freshwater input.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56908
Title: Analysis of lactate and malate dehydrogenase enzyme profiles of selected major carps of wetland of Calcutta
Author: Madhumita Manna, Priyanka Chakraborty
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Enzyme profile, East Calcutta wetland, Indian major carps
Abstract: The East Calcutta Wetland (ECW), a Ramsar site in India, acts as the only sink for both city sewages as well as effluencts from the surrounding surroundign small-scale industries and is alarmingly polluted with heavy metals. The three best edible major carp species rohu (Labeo rohita), Catla (Catla catla), and mrigala (Cirrhinus mrigala) were undertaken to monitor lactate dehydrogenase (LDH) and malate dehydrogenase (MDH) by cellulose acetate electrophoresis (CAE) to assess the effects of pollutants, if any. Crude tissue extracts were prepared from brain, eye, heart, skeletal muscle and kidney tissue respectively from each type of fish. No differences was not found in MDH of catla from both sites for all tissues analyzed in this study. Rohu also showed similar mobility for all tissues except for heart tissue which was distinctly different in fishes from ECW site than that of its counterpart from now ECW site. On the other hand, MDH of two tissues of mrigala, eye and muscle respectively showed different migraion patterns. LDH profiles for all tissues of three fish species from both the sites were consistently simialr, only the expression levels of muscle LDH of mrigala adn kidney LDH of rohu varied little.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56907
Title: Analysis of heavy metals in dying wetland Pallikaranai, Tamil Nadu, India
Author: M Sridevi Darpagavalli, P Malini, A Ramachandran
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Wetland, heavy metals, surface water, Management strategies
Abstract: Pallikaranai wetland has high ecological significant as it has been a home for other associated biodiversities. This wetland is highly polluted due to the rapid industrialization, urbanization and dumping of solid waste. The water quality of the Pallikaranai wetland has been studied with reference to toxic metals. The metals analyzed include lead, chromium, iron, copper, nickel, zinc and cadmium. The heavy metal analysis in surface waters were in the following range; Cd: BDL-0.019 mg l-1, Fe: BDL - 1.52 mg l-1, Cu: BDL-0.02mg l-1,Ni:BDL-0.60 mg l-1,Pb:0.03-1.13 mg l-1,Zn: 0.002-0.14 mg l-1 and Cr:0.10-1.52 mg l-1 respectively. The dominance of various heavy metals in the surface water of the Pallikaranai wetland followed the sequence : Pb> Cr> Fe> Ni> Zn> Cd> Cu. The quality of water hs deterioted due to the various anthropogenic activities. Most of the metal ions were in higher concentration compared to the standards. It has been observed that the quality of the surface water is not safe for aquatic and domestic life, hence necessary management actions should be taken to control the quality of the surface water.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56906
Title: Impact of coal mining on soil characteristics around lb river coalfield, Orissa, India
Author: Haraprasad Mohapatra, Shreerup Goswami
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: lb river, coalfield, soil characteristics, coal mining
Abstract: The present article deals with the soil analysis around five opencast coal projects of lb river coalfield during pre-monsoon (March), monsoon (July) and post monsoon (November) periods of successive three years (i.e, 2006, 2007 and 2008). Sampling of soil has been doen from the vertical surface of the overburden at successive depths of 0-5 ft, 5-10ft and at 10-15ft. The different physical (soil texture, soil moisture, particle density, bulk density and porosity) and chemical (pH, organic carbon, nitrogen, phosphorus and potassium) parameters have been analysed. The soil textures of the study area are found to be loamy sand to loam, loam to silty loam and clay loam to silty clay loam in the dpeth of 0-5 ft, 5-10 ft and at 10-15 ft, respectively. The moisture content (7.297 at 0-5ft, 5.25 at 5-10 ft and 4.134% at 10-15 ft) and porosity (43.994 at 0-5 ft, 40.682 at 5-10 ft and 35.85% at 10-15 ft) of the soil in the study area decreased gradually from the surface to greater depth. However, the particle density (2.639 at 0-5 ft, 3.11 at 5-10 ft and 3.523 g cc-1at 10-15 ft) and the bulk density (1.478 at 0-5 ft, 1.839 at 5-10 ft and 2.269 g cc-1 at 10-15 ft) in this region increased from surface to the deeper region of the soil. The organic carbon (1.367 at 0-5 ft, 0.9 at 5-10 ft and 0.396 kg ha-1 at 10-15ft), nitrogen (2.845 at 0-5 ft, 1.059 at 5-10 ft and 0.48 kg ha-1 at 10-15 ft) adn phosphorus level (1.11 at 0-5 ft, 0.715 at 5-10 ft and 0.679 kg ha-1 at 10-15ft) of the soil decreased wit increasing depth of the soil. However, the content of potassium (2.636 at 0-5 ft, 4.374 at 5-10 ft and 5.82 kg ha-1 at 10-15 ft) increased gradually from the surface to the greater depth. Analysis of variance is computed to infer the variation in the concentration of parameters in different opencast coal projects and in various depths of the study area.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56905
Title: Effect of fluoride pollution on genetic diversity of a medicinal tree, Syzygium cumini
Author: Suphiya Khan, Mamta Baunthiyal, Alka Kumari, Vinay Sharma
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Fluoride, genetic diversity, RAPD, Syzygium cumini
Abstract: Syzygium cumini Linn. (Myrtaceae) is a medicinal tree (Jamun) used worldwide in treatment of diabetes. However, no molecular data is availabel on genetic polymorphism and its relationship, if any iwth fluoride pollution. In the present study, the genetic variability of two populations of S. cumini growing in fluoride rich soils and normal soils located in Rajasthan and Haryana regions of India, respectively was determined using random amplified polymorphic DNA (RAPD) markers. Different measures of diversity in Rajasthan populations: Shannon ' s index of phenotypic diversity (I) = 0.440; Nei ' s genetic diversity (h) = 0.292; effective number of alleles per locus (Ne) = 1.497; total species diversity (Hsp) = 0.307 and within population diversity (Hpop) =0.158 showed high diversity in comparison to Haryana populations. Thus, it seems that Rajasthan population responds with increased genetic variation resulting possibly from new mutations that affect allele frequencies as a consequence of adaptation to contaminated environment. This may imply that the increased diversity levels may act as a buffer to combat fluoride stress. Cluster analysis and pricipal component analysis (PCA) results showed mixing between the populations.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56904
Title: Seasonal variations and biodiversity of zooplankton in Harsool-Savangi dam, Aurangabad, India
Author: S E Shinde, T S Pathan, D L Sonawane
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Zooplankton, Biodiversity indices, Seasonal variations, Harsool- Savangi dam
Abstract: The present study concerns seasonal variations, correlation coefficient and biodiversity indices of zooplanktons during January-December, 2008 in the Harsool-Savangi dam, Aurangabad, India. A total of 25 genera were recorded of which 10 were Rotifers, 8 Cladocerons, 5 Copepods and 2 Ostracods. Present study revealed maximum percentage wise compositions of Rotifers at north site were 58.28%, Cladocerons at south site were 29.78%, Copepods at east site were 16.59% adn Ostracods at south site were 4.20%, respectively. Minimum percentage wise compositions Rotifers at south site were 51.54%, Cladocerons at west site were 26.71%,Copepods at north site wer 11.03% and Ostracods at north site were 1.36%, respectively. Margalef ' s index (R1) and Menhinick index (R2) values (3.58 and 0.87) were found to be the highest at south site and lowest at (3.16 adn 0.56) north site. Simpson ' s index (I) values (0.43) were found to be the highest at north site and lowest (0.370 at south site. Shannon-Weiner index (H ' ) values (1.06) were found to be the highest at south site and lowest values (0.94) at north site. Maximum species evenness was recorded at South site while maximum speces eveness was recorded at north site. Maximum population density of Rotifers, Cladocerons, Copepods and Ostracods (799, 350, 163 and 18) were recorded at south site in monsoon, respectively.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None
ID: 56903
Title: Morphological changes in the gills of Heteropneustes fossilis (Bloch) exposed to coal mining effluent water
Author: B K Mylliemngap, S N Ramanujam
Editor: Dr R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 4, July 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Heteropneustes fossilis, Scanning electron microscopy, coal mine effluent, Morphological changes
Abstract: Ultrastructural changes in the gills of cat fish Heteropneustes fossilis exposed to coal mining effluent water collected from Rymbai river in Jaintia hills, Meghalaya, India was investigated under scanning electron microscopy (SEM). The pH of effluent water in the river was significantly low (2.5-3.0) due to coal mining activity in the adjacent areas. The dissolved oxygen (DO) was 7.7 mg l-1 and conductivity 0.93 mS. Morphological changes like dissociation of the epithelium (E) of branchial arches and gill filaments, hypertrophy and disorientation in the array of lamellae were observed in the treated fish, leading to fish death. The primary and secondary gill lamellae (PL and SL) exhibited fusion, distortion and loss of aligment. Some of the gill rackers showed necrosis at certain places. The morphological features of the gills as revealed through SEM were higly deteriorated when compared to control.
Location: TE 15, New Biology Building
Literature cited 1: None
Literature cited 2: None