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Yadav, M. K.
- Emergence of Epizootic Ulcerative Syndrome: Large-Scale Mortalities of Cultured and Wild Fish Species in Uttar Pradesh, India
Abstract Views :269 |
PDF Views:79
Authors
P. K. Pradhan
1,
G. Rathore
1,
N. Sood
1,
T. R. Swaminathan
1,
M. K. Yadav
1,
D. K. Verma
1,
D. K. Chaudhary
1,
R. Abidi
1,
P. Punia
1,
J. K. Jena
1
Affiliations
1 National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow 226 002, IN
1 National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow 226 002, IN
Source
Current Science, Vol 106, No 12 (2014), Pagination: 1711-1718Abstract
Epizootic ulcerative syndrome (EUS), a disease listed by World Organisation for Animal Health (OIE) has been reported in 26 countries across 4 continents. Till date, 94 fish species have been found to be naturally infected with EUS and its host range is gradually expanding. In the year 2010-11, outbreaks resulting in heavy fish mortality were recorded in wetland districts of Uttar Pradesh, India, and EUS was confirmed as the cause of mortality on the basis of histopathology, isolation of Aphanomyces invadans, bioassay and PCR. A prevalence of ∼69% (371/540) was recorded and 13 fish species were found to be infected. Interestingly, EUS was observed in seven new species (Aristichthys nobilis, Channa punctatus, Wallago attu, Mastacembelus armatus, Mystus cavasius, Anabas testudineus and Puntius conchonius) for the first time in natural outbreaks. Furthermore, the disease was observed even in the month of May when the mean water temperature was 31.6±0.65°C. This suggests that the disease can result in severe losses even after two decades of its emergence.Keywords
Aphanomyces invadans, Epizootic Ulcerative Syndrome, Wild Fish Species.Full Text
- Occurrence of kornerupine-bearing granulite from Kunjan locality, Salem district, Tamil Nadu, India
Abstract Views :193 |
PDF Views:79
Authors
D. Prakash
1,
C. K. Singh
1,
R. S. Kumar
2,
R. Yadav
1,
S. K. Rai
1,
M. K. Yadav
3,
Pradip K. Singh
1,
S. Jaiswal
1
Affiliations
1 Centre of Advanced Study in Geology, Banaras Hindu University, Varanasi 221 005, IN
2 Department of Earth Sciences, Annamalai University, Annamalai Nagar 608 002, IN
3 Centre of Advanced Study in Geology, University of Lucknow, Lucknow 226 007, IN
1 Centre of Advanced Study in Geology, Banaras Hindu University, Varanasi 221 005, IN
2 Department of Earth Sciences, Annamalai University, Annamalai Nagar 608 002, IN
3 Centre of Advanced Study in Geology, University of Lucknow, Lucknow 226 007, IN
Source
Current Science, Vol 121, No 9 (2021), Pagination: 1241-1248Abstract
Kornerupine, although a rare mineral, has been reported from several locations around the world in various types of aluminomagnesian Proterozoic rocks subjected to amphibolite and granulite facies metamorphism. Here we report the occurrence of kornerupine in quartzo-feldspathic gneisses near Kunjan town located in the southwestern part of Salem district, Tamil Nadu, India. These kornerupine granulites show well-preserved retrogression texture, involving hydration reactions which helped develop the various mineral assemblages. The common stable assemblage in these granulites is orthopyroxene–cordierite–kornerupine–biotite–spinel–K-feldspar–plagioclase. The P–T conditions of these granulites have been derived using the winTWQ program, which gives results of ~800°C and ~6 kbar for kornerupine-bearing assemblage. The high P–T assemblage reported from this area bears a significant relationship with the metamorphic history and exhumation of the Salem–Namakkal blockKeywords
Hydration reactions, kornerupine granulites, metamorphic evolution, mineral assemblages, retrogression texture.Full Text
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