1 April 13, 2017
Articles and Statements
1. Shankhadeep Chakraborty, Abhijit Mitra
Bioaccumulation pattern of trace metals in commercially important crustaceans in Indian Sundarbans
Russian Journal of Biological Research, 2017, 4(1): 4-12.
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2. Alexander S. Semenov, Vladimir V. BulatRussian Journal of Biological Research, 2017, 4(1): 4-12.
Abstract:
We measured the concentrations of Pb and Cd, in muscle tissue of 3 commercially important crustacean species (Penaeus monodon, Fenneropenaeus indicus and Metapenaeus brevicornis) collected from the UNESCO declared world heritage site Indian Sundarbans. The Indian Sundarbans estuarine system is recognized as one of the most diversified and productive ecosystems in the world located at the confluence of Hooghly-Matla estuarine complex. Due to negative pressures like intense industrialization, urbanization and increase of anthropogenic activities in recent era, this ecosystem is getting contaminated with toxic heavy metals which vary with seasons. Significant variation of heavy metals in muscle tissue of 3 commercially important crustaceans collected from four different sampling stations (2 in central and 2 in western sector) of Indian Sundarbans were observed. Inductively coupled plasma – mass spectrometer was used to study the level of metals in tissues of selected species. The concentration of trace metals accumulated in all the muscle tissues of selected species followed the order Pb> Cd. The distribution of metals exhibited significant spatial variation and followed the order station 1 >station 2 > station 3 > station 4, which may be due to variable degree of contamination in different location (p < 0.01) indicating the adverse impact of industrialization and urbanization on the edible crustaceans community. When compared with the recommended value of World health Organization (WHO, 1989) in context to consumption of seafood, metal concentration in all the crustaceans showed higher value, the only exception was Sajnekhali (Station 4) for Metapenaeus brevicornis.
We measured the concentrations of Pb and Cd, in muscle tissue of 3 commercially important crustacean species (Penaeus monodon, Fenneropenaeus indicus and Metapenaeus brevicornis) collected from the UNESCO declared world heritage site Indian Sundarbans. The Indian Sundarbans estuarine system is recognized as one of the most diversified and productive ecosystems in the world located at the confluence of Hooghly-Matla estuarine complex. Due to negative pressures like intense industrialization, urbanization and increase of anthropogenic activities in recent era, this ecosystem is getting contaminated with toxic heavy metals which vary with seasons. Significant variation of heavy metals in muscle tissue of 3 commercially important crustaceans collected from four different sampling stations (2 in central and 2 in western sector) of Indian Sundarbans were observed. Inductively coupled plasma – mass spectrometer was used to study the level of metals in tissues of selected species. The concentration of trace metals accumulated in all the muscle tissues of selected species followed the order Pb> Cd. The distribution of metals exhibited significant spatial variation and followed the order station 1 >station 2 > station 3 > station 4, which may be due to variable degree of contamination in different location (p < 0.01) indicating the adverse impact of industrialization and urbanization on the edible crustaceans community. When compared with the recommended value of World health Organization (WHO, 1989) in context to consumption of seafood, metal concentration in all the crustaceans showed higher value, the only exception was Sajnekhali (Station 4) for Metapenaeus brevicornis.
Number of views: 1722 Download in PDF
On Localization of Ancient Bearers of Y-DNA R1a Haplotype in Eastern Europe Neolitic Cultures. Part III. New Findings Support the Comb Ware («Pontic Impresso») Version
Russian Journal of Biological Research, 2017, 4(1): 13-20.
Number of views: 2022 Download in PDF
3. Russian Journal of Biological Research, 2017, 4(1): 13-20.
Abstract:
The work considers the problems of genetics, archeology, and anthropology connected with problem of localization of R1a* Y-DNA haplotype bearers in Mesolithic and Neolithic Pre-Corded Ware archaeological sites. Based on the analysis of findings of the 2017 year (described in other works) this paper supports and finds new arguments that the areas of Comb Ware cultures of Eastern Europe could be the possible areas of archaic Y-DNA R1a1 subclades dispersion in the pre-Copper Age period. This paper deals with new haplogroup findings in Eastern Europe and Central Asia. Also the findings of H2a2 in Mongolia are considered as the support of our hypothesis. The link between archaic R1 subclades distribution and Uralic and Altaic language dispersal is developed. We identify two mega-areas of different Neolithic traditions: the one R1b-preM73 dominated, and the second one of «Pontic Impresso» connected with R1a bearers. It is also shown that both groups could move to Altai in the Neolithic times.
The work considers the problems of genetics, archeology, and anthropology connected with problem of localization of R1a* Y-DNA haplotype bearers in Mesolithic and Neolithic Pre-Corded Ware archaeological sites. Based on the analysis of findings of the 2017 year (described in other works) this paper supports and finds new arguments that the areas of Comb Ware cultures of Eastern Europe could be the possible areas of archaic Y-DNA R1a1 subclades dispersion in the pre-Copper Age period. This paper deals with new haplogroup findings in Eastern Europe and Central Asia. Also the findings of H2a2 in Mongolia are considered as the support of our hypothesis. The link between archaic R1 subclades distribution and Uralic and Altaic language dispersal is developed. We identify two mega-areas of different Neolithic traditions: the one R1b-preM73 dominated, and the second one of «Pontic Impresso» connected with R1a bearers. It is also shown that both groups could move to Altai in the Neolithic times.
Number of views: 2022 Download in PDF