Ameloblastic Carcinoma - A Case Report

Ameloblastic carcinoma is a rare odontogenic tumor in which there is histological evidence of malignancy in the primary or recurrent tumour, regardless of whether it has metastasized. The accurate diagnosis of this tumour is important as it resembles clinically and histologically a host of other entities. We present a case of ameloblastic carcinoma occuring in 65 years old male and discuss other lesions which may mimic ameloblastic carcinoma

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Not AvailableHooghly estuary, the lowermost part of River Ganges in India, following the construction of Farakka barrage in 1975, witnessed improved freshwater inflow in the estuarine stretch of the river with significant impact on the salinity regime, water transparency, suspended sediments and nutrient load leading to alternations in the distribution and abundance of fish and other biotic organisms like plankton and benthos. A detailed seasonal study was conducted in Hooghly estuary during 2010–2012 to evaluate the spatio-temporal changes in selected physico-chemical parameters like temperature, transparency, pH, free CO2, dissolved oxygen, specific conductivity, total alkalinity, total hardness, salinity, available nutrients like nitrate, phosphate and silicate under the present hydrological regime in determining the distribution of fish and other aquatic organisms. The salinity based zonation during pre-Farakka period apparently stands modified with a downward shift of freshwater zone. Accordingly, distribution and abundance of biotic communities like plankton and fish now present a completely different scenario from the past.Not Availabl

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Rivers for life proceedings of the international symposium on river biodiversity : Ganga Brahmaputra Meghna river system ecosystems for life

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Not AvailableThe tidal freshwater areas of estuaries have received little attention in ecological research although they are often heavily stressed by environmental impacts. These critical habitats contribute significantly to the biodiversity of the entire estuarine system. The present study aims to describe the fish diversity, assemblage structure and seasonal dynamics through data collected by intensive sampling of the tidal freshwater stretch of the Hooghly estuary (June 2010 to June 2012), the largest estuary in India formed in the Gangetic delta. The tidal freshwater zone of Hooghly has gained importance due to ecological changes during the post-Farakka period since this zone covers 74% of the total estuarine stretch. During the study, a total of 155 fish species belonging to 49 families and 15 orders were recorded from the tidal freshwater zone of the Hooghly estuary. The exotic ornamental fish Barbonymus altus (Tinfoil Barb) has been recorded from the tidal freshwater zone which is the first record of these species in Indian inland waters. A detailed analysis of the fish diversity revealed that of the total 155 species recorded from the study, 19 species have been listed in category of threatened fishes by National Bureau of Fish Genetic Resources (Lakra et al., 2010). This includes 16 vulnerable (VU) species and 4 endangered (EN) species. This signifies the role of tidal freshwater zone as an essential fish habitat due to its rich fish diversity and as a sheltered area which favours the growth and survival of larval and juvenile fish assemblages.Not Availabl

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Not AvailableThe Indian part of the Sundarbans, a mosaic of 102 islands, is separated by about 1750 ssquare kilometres water area, including tidal rivers, creeks and brackish water lagoons which form a major capture fishery resource of the area. A study was conducted to understand present fish species distribution in different rivers inside Sundarbans in reported increased salinity regime of these rivers. Salinity was much higher in the Matlah river system as compared to the Hooghly river system. Also, parameters related to salinity such as specific conductivity, total hardness etc. were found differ widely between the Hooghly and the Matlah river system. Higher salinity has its influence on estuarine fish species distribution in the Matlah river system. Many euryhaline fish species such as Bregmaceros mcclellandi, Lutjanus johni, Macrospinosa cuja, Therapon jarbua, Harpadon nehereus etc. are present in plenty in the Gosaba-Sajnekhali area in the Matlah river system whereas they were absent in the Hooghly river at Diamond Harbour. Roychak in the Hooghly estuary and Canning in the Matlah estuary revealed similar phenomenon of occurrence of Eleutheronema tetradactylum, Anodontostoma chacunda, B. mcclellandi, Upeneus sulphureus etc. in bag net catch at Canning whereas Roychak bag net catch was dominated by Otolithoides pama, Setipinna phasa etc. A major difference was noted in the landing of the prized Tenualosa ilisha which is scarcely available in the rivers of the Matlah river system.Not Availabl

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Not AvailableNot AvailableHooghly estuary, the lowermost part of River Ganges in India, following the construction of Farakka barrage in 1975, witnessed improved freshwater inflow in the estuarine stretch of the river with significant impact on the salinity regime, water transparency, suspended sediments and nutrient load leading to alternations in the distribution and abundance of fish and other biotic organisms like plankton and benthos. A detailed seasonal study was conducted in Hooghly estuary during 2010–2012 to evaluate the spatio-temporal changes in selected physico-chemical parameters like temperature, transparency, pH, free CO2, dissolved oxygen, specific conductivity, total alkalinity, total hardness, salinity, available nutrients like nitrate, phosphate and silicate under the present hydrological regime in determining the distribution of fish and other aquatic organisms. The salinity based zonation during pre-Farakka period apparently stands modified with a downward shift of freshwater zone. Accordingly, distribution and abundance of biotic communities like plankton and fish now present a completely different scenario from the past.Not Availabl

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Not AvailableThe present study reports a record of invasive Loricariid catfish Pterygoplichthys disjunctivus (Weber, 1991) (Siluriformes: Loricariidae) from the Bhagirathi–Hooghly system of River Ganga in West Bengal, India. The species was encountered from Farakka and Balagarh regions of Ganga, two areas with different hydrological regimes. The average total length and total weight of the collected species was in the range of 360–450 mm and 314-545 g respectively. This exotic species is reported to contribute about 10% of the total catch from the Balagarh area of the river stretch, while its occurrence is sparse in Farakka. The algivorous nature of feeding can pose a threat to nativebottom dwelling fish due to feeding competition. As the presence of this exotic fish in the lower parts of Ganga has been confirmed, we discuss necessary management interventions like identifying the source of its introduction in order to prevent future threats from this invasive species to native river species.Not Availabl

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Not AvailableThe present study reports a record of invasive Loricariid catfish Pterygoplichthys disjunctivus (Weber, 1991) (Siluriformes: Loricariidae) from the Bhagirathi–Hooghly system of River Ganga in West Bengal, India. The species was encountered from Farakka and Balagarh regions of Ganga, two areas with different hydrological regimes. The average total length and total weight of the collected species was in the range of 360–450 mm and 314-545 g respectively. This exotic species is reported to contribute about 10% of the total catch from the Balagarh area of the river stretch, while its occurrence is sparse in Farakka. The algivorous nature of feeding can pose a threat to nativebottom dwelling fish due to feeding competition. As the presence of this exotic fish in the lower parts of Ganga has been confirmed, we discuss necessary management interventions like identifying the source of its introduction in order to prevent future threats from this invasive species to native river species.Not Availabl