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- 저자 : Bidhan C Patra (검색결과 5 건)
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Freshwater fish resource mapping and conservation strategies of West Bengal, India
Bidhan Chandra Patra,Avijit Kar,Manojit Bhattacharya,Srikanta Parua,Pravat Kumar Shit 대한공간정보학회 2017 Spatial Information Research Vol.25 No.5
Explorations and Germplasm estimation of fish biodiversity in the freshwater bodies of India are being gradually updated and analysed with a number of new discoveries though a well-defined figure of existing freshwater fish species at regional and state level remains to be calculated. The freshwater resources of India are currently experiencing an alarming decline trend in term of piscine biodiversity due to several undesired factors and consequences a considerable portion of freshwater fishes have been categorized as Threatened category. West Bengal is now becomes one of the most significant states of freshwater fish producer in India. The research study workout and divide the West Bengal state into six major physiographic divisions along with the help of modern Geoinformatics techniques (ArcGIS 10.2, Google Earth and Global Mapper software for map making purpose). The present study deals with the freshwater fish resource, distribution and biodiversity assessment of entire part of West Bengal. Occurrence of 251 fish species belonging to 15 orders, 50 families have been noted during the study period of 2012–2016. It is evident that the members belonging to Cyprinifomes constitute 37% of the total fish fauna of the river. Fluctuation in occurrence and abundance of the species are influenced by several anthropogenic activities. The demand of proper management of conservation policy is highlights through our research work.
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Chini Deep Sankar,Mondal Niladri,Kar Avijit,Bunholi Ingrid,Singh Sourav,Ghosh Pratik,Patra Prasanta,Patra Shampa,Patra Bidhan Chandra 한국해양과학기술원 2023 Ocean science journal Vol.58 No.2
Marine fishes are one of the important factors in stabilizing the local aquatic ecosystem and regulating the nutritional socioeconomy of local fisher folks. The recent increases in anthropogenic activity, pollution and overfishing have led to the decline of marine fish species richness and their local aquatic habitats. In this study we sought to determine the inter-relationship between water quality, anthropogenic activity, and fish landing stations through a 31 km stretch of the East Midnapore coast in West Bengal, India which is known for its tourist destinations. The study was conducted monthly on different trawler fish landing sites from Dec 2018 to Dec 2021. During this period, we took fish samples and identified them. We obtained water quality data regarding Sea Surface Temperature (SST), Concentration of Chlorophyll-a (Chl-a), Turbidity, and Dissolved Oxygen (DO) in order to identify further correlation between the water quality analysis and species diversity. 154 numbers of commercially important marine fish species were documented. As per the IUCN database, 13% of the total fish species fall under the red list category and 16% of the species reveal a decreasing population trend. The availability of those red-listed fish throughout the season has been shown in the matrix plot to detect their gradual decrease in sighting. After analyzing the water quality data, we found out that DO, SST, Turbidity, and Chl-a correlate with the species richness on some sites and the water parameters are also differs during the seasons. Both fish species richness and water quality have been affected on those fish landing sites which have been subject to heavy anthropogenic loads.
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DNA barcoding to fishes: current status and future directions
Bhattacharya, Manojit,Sharma, Ashish Ranjan,Patra, Bidhan Chandra,Sharma, Garima,Seo, Eun-Min,Nam, Ju-Suk,Chakraborty, Chiranjib,Lee, Sang-Soo Informa UK (Informa Healthcare) 2016 Mitochondrial DNA. Part A Vol.27 No.4
<P>DNA barcoding appears to be a promising approach for taxonomic identification, characterization, and discovery of newer species, facilitating biodiversity studies. It helps researchers to appreciate genetic and evolutionary associations by collection of molecular, morphological, and distributional data. Fish DNA barcoding, based on the sequencing of a uniform area of Cytochrome C Oxidase type I (COI) gene, has received significant interest as an accurate tool for species identification, authentication, and phylogenetic analysis. The aim of this review article was to investigate recent global status, approaches, and future direction of DNA barcoding in fisheries sectors. We have tried to highlight its possible impacts, complications, and validation issues at species levels for biodiversity analysis. Moreover, an effort has been put forward to understand issues related to various marker genes associated with barcode process as primer sequences and have concluded barcode promotion as an indispensable tool of molecular biology for the development of taxonomic support systems.</P>
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Chiranjib Chakraborty,Ashish Ranjan Sharma,Sharma Garima,Manojit Bhattacharya,Bidhan C. Patra,Bimal Kumar Sarkar,Saptarshi Banerjee,Kankana Banerjee,Sang‑Soo Lee 한국유전학회 2021 Genes & Genomics Vol.43 No.7
Background Currently, Tigers (the top predator of an ecosystem) are on the list of endangered species. Thus the need is to understand the tiger’s population genomics to design their conservation strategies. Objective We analyzed the molecular evolution of tiger diversity using NADH dehydrogenase subunit 4 (ND4), a signifcant electron transport chain component. Methods We have analyzed nucleotide composition and distribution pattern of ND genes, molecular evolution, evolutionary conservation pattern and conserved blocks of NADH, phylogenomics of ND4, and estimating species divergence, etc., using diferent bioinformatics tools and software, and MATLAB programming and computing environment. Results The nucleotide composition and distribution pattern of ND genes in the tiger genome demonstrated an increase in the number of adenine (A) and a lower trend of A+T content in some place of the distribution analysis. However, the observed distributions were not signifcant (P > 0.05). Evolutionary conservation analysis showed three highly align blocks (186 to 198, 406 to 416, and 527 to 545). On mapping the molecular evolution of ND4 among model species (n = 30), we observed its presence in a broader range of species. ND4 based molecular evolution of tiger diversity and time divergence for a tiger (20 diferent other species) shows that genus Panthera originated more or less at a similar time. Conclusions The nucleotide composition and nucleotide distribution pattern of tiger ND genes showed the evolutionary pattern and origin of tiger and Panthera lineage concerning the molecular clock, which will help to understand their adaptive evolution.
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