Wetlands play an undebatable role in regulating the global climate, hydrological cycle and ecosys... more Wetlands play an undebatable role in regulating the global climate, hydrological cycle and ecosystem diversity; and, therefore, must be preserved and conserved. Conversely, global wetland area and water quality has since been declining (c 87% around the globe since 1700 AD), mainly due to human interference accompanied by natural succession process. Under this backdrop, physical, chemical, biological and ichthyologic features and fisher folk (following standard procedures of study) of the Asian wetland Sone Beel has been focused as a typical case study in the global scenario. Threats to the to Ramsar sites along with their categorization has also been discussed on a global scenario.
The present study was conducted on Burundian coast of Lake Tanganyika in 4 sampling sites to iden... more The present study was conducted on Burundian coast of Lake Tanganyika in 4 sampling sites to identify and to estimate the spatial abundance of zooplankton community and to analyze whether physicochemical properties of water influence significantly the occurrence of zooplankton population. During the survey, it has been realized that zooplankton organisms were very few in number and taxonomic diversity and was comprising of 3 orders: Cyclopoida, Calanoida (Copepods) and Cladocera represented by Diaphanosoma. 12species belonging to 4families have been noted from all study sites. The relative diversity index of families revealed that the family Diaptomidae was dominant with 5species (41.7%) followed by family Cyclopidae with 4species (33.3%), then family Sididae with 2species (16.7%) while the Temoridae family was last with a single species (8.3%)<br> The results of species richness and the Cumulative abundance of the sampling sites showed that zooplankton species and density wer...
River Siang is the main river of East Siang district and also it is one of the most important tri... more River Siang is the main river of East Siang district and also it is one of the most important tributary of the mighty River Brahmaputra drainage system. River Siang plays an important role in lives of the surrounding inhabitants viz. fishing, bathing, washing, disposal, industrial wastes, and other human activities and most importantly the water of River Siang are uses by PHE of East Siang district for drinking purpose of water. Assessments of physico-chemical parameters were carried out during 2012 to 2014 in the six different study sites of River Siang. A major and important different water quality parameters were measured in all collected samples, including Water Colour, Air Temperature, Water Temperature, pH, DO, FCO 2, Conductivity, Total alkalinity, Turbidity, Total hardness, TSS and TDS. The results that are recorded in the different stations are compared with the different seasons and also with the different year. An analysis of the drainage network of a part of River Siang ...
Transylvanian Review of Systematical and Ecological Research, 2020
The Jinam River habitats inventory revealed the presence of alluvial valley, cascades, riffle-poo... more The Jinam River habitats inventory revealed the presence of alluvial valley, cascades, riffle-pools, boulders, cobbles, and gravel as types of substrata. The limnological parameters portrayed average values of air and water temperature, turbidity, pH, dissolved oxygen, free carbon di-oxide, total alkalinity, and conductivity. This recent pioneering study on the fish of the Jinam River in the Dima Hasao District of Assam revealed the presence of 18 species belonging to 15 genera, five families, and three orders, which are reported for the first time through this paper. Worth highlighting is the abundance of Barilius bendelisis and Devario aequipinnatus, and the fewer numbers of Chanda nama, these warranting proper management and conservation of the fish for this river.
The length-weight relationship of Neolissochilus hexagonolepis (McClelland) and Garra lissorhynch... more The length-weight relationship of Neolissochilus hexagonolepis (McClelland) and Garra lissorhynchus (McClelland), collected from Jatinga river in Assam, have been studied. Based on 50 specimens of N.hexagonolepis (70-270 mm) and 72 specimens of G.lissorhynchus (47-94mm), the regression equation was calculated to be Log W=-2.882 + 1.922 Log L and Log W=-5.171 + 3.152 Log L respectively for the two species of fishes. The computed ‘t’ values indicated that ‘n’ value of N.hexagonolepis is significantly different from the expected value of ‘3’. The relative condition factor (Kn) remained greater than 1 for N.hexagonolepis and G.lissorhynchus indicating their good well being.
The unique topography of North East (NE) India and watershed pattern is an attractive field for I... more The unique topography of North East (NE) India and watershed pattern is an attractive field for Icthyological studies. This region has already been recognized as a global spot of freshwater fish diversity. The study was conducted on fish diversity and physico-chemical parameters during January 2015 to May 2015 in River Bhogdoi, one of the south bank sub-tributaries of the mighty River Brahmaputra. A total 30 species of fishes under 26 genera, 5 orders and 16 families were recorded form the River Bhogdoi. Cypriniformes were found to be the most abundant group while Synbranchiformes and Beloniformes were less abundant groups during the whole study period. The study of physico-chemical parameters of River Bhogdoi revealed that, the river water appeared to be less polluted and physico-chemical parameters were mostly found to be in the favourable and suitable ranges for the aquatic organisms. The results that were recorded in the different stations and different seasons were compared wit...
Infection with trematode parasites can lead to severe change in nutrient content and may result i... more Infection with trematode parasites can lead to severe change in nutrient content and may result in host mortalities and character of a water body may influence the parasitic fauna. Hence a study was carried out from 2010 to 2011 to find out a correlation of water’s physic-chemical characteristics and trematode parasites of Channa punctata (Bloch) in Awangsoi Lake, Manipur, India. During the present investigation three species of trematodes were recorded. In the present study there were concurrent infections by two or more parasite species. The percentage of infection was positively correlated with temperature, pH, DO and conductivity in Awangsoi Lake. There was a significant positive correlation (r = 0.652; p<0.05) with FCO2 and a negative correlation with alkalinity. Seasonal variation in the occurrence of these parasites may be attributed to ecological conditions, particularly distribution of intermediate hosts and also the age of the host and the life cycle of the parasite spe...
The present investigation deals with a systematic survey of trematode parasites of air breathing ... more The present investigation deals with a systematic survey of trematode parasites of air breathing fishes from Awangsoi Lake collected during 2008-2009. The air breathing fishes found in Awangsoi Lake are Channa punctatus, Clarias batrachus, Channa striatus, Channa orientalis, Anabas testudineus and Heteropneustes fossilis. During the study period the following 5 species of trematodes were collected : Clinostomum complanatum, Allocreadium handia, Allocreadium fasciatusi, Astiotrema reniferum and Genarcopsis goppo. The percentage of abundance was found to be maximum in Astiotrema reniferum and Anabas testudineus harbours the maximum number of parasites.
The present commentary deals with the diversity of rotifers from three different habitats that in... more The present commentary deals with the diversity of rotifers from three different habitats that include a river, lake and an irrigation canal from Manipur, India. Using the samples (n = 288) spanning over a 2-year period the species richness and the abundance of rotifers were assessed. A total of 34 species of rotifers from 11 families were observed with varying relative abundance, with the diversity indices (Shannon–Wiener, H’) ranging between 2.98 and 3.23. The species composition of the three habitats differed considerably, as evident from the multivariate analysis. In the lake habitat, the dominant species was Brachionus calyciflorus (7.9%), while in the irrigation canal the dominant species was Brachionus ruben (10.4%), and for the river habitat the dominant species was B. calyciflorus (11.5%). Using relative abundance of the rotifer species as explanatory variables, the ordination of the 34 species yielded significant differences based on the similarity in the abundance over the sampling period. On the basis of the overall differences in the species composition of rotifers, the three habitats could be segregated significantly (P < 0.05) based on the discriminant function analysis. Although the species composition of rotifers remained similar to other freshwater bodies of the this geographical region, the diversity and community analysis suggested considerable differences with reference to the three habitats, implying significance for limnological management.
Zooplankton form a food support of any aquatic ecosystem, and have been reported in percentage co... more Zooplankton form a food support of any aquatic ecosystem, and have been reported in percentage composition of different groups. The diversity of various types of zooplankton was studied and the result revealed that the zooplankton was represented by various genera viz., cladocera, rotifera, copepoda and ostracoda. The numbers of varieties of group rotifera have been reported maximum but the percentage amount of cladocera group followed by rotifera in general. The range of total zooplankton between 253 No-ml to 622 No-ml and average was 430.42 No-ml. The annual percentage composition of various representative groups revealed 38.84% cladocera, 37.13% rotifera, 23.56% copepoda and 0.46% ostracoda. The detailed aspect of seasonal variation, percentage composition and diversity of zooplankton is discussed herein.
Study was carried out from June 2012 to July 2013 in a 58 km stretch of the river Siang in Arunac... more Study was carried out from June 2012 to July 2013 in a 58 km stretch of the river Siang in Arunachal Pradesh, India to determine ichthyofaunal diversity in this section of the river. The study revealed the presence of 82 species of fishes belonging to 8 orders, 24 families and 53 genera. Species representing the order Cypriniformes dominated the ichthyofauna while those representing Tetradontiformes are in less number.
Fish is one of the best sources of animal protein of the food. Fishing and hunting are the oldest... more Fish is one of the best sources of animal protein of the food. Fishing and hunting are the oldest profession of all mankind since man began his search of food. Traditional fishing catching devices which were operated in River Siang, Arunachal Pradesh have been studied with respect to its operation, structure and productivity. The small depicted work highlight 13 different types fish catching devices, which have been classified into 5 different types viz., (i) Encircling Gear (Khewali Jal, Angtha Jal and Ber Jal or Jeng Jal) (ii) Entangling Gear (Langi or Current Jal and Phansi Jal) (iii) Scooping Gear (Sip Jal and Thela Jal) (iv) Hooks and Line fishing (Nal Barshi and Doogabanshi) (v) Traps (Chepa, Dingora, Polo, and Kholaha). The present study was carried out from June 2012 to July 2013 in a 58km stretch of River Siang in East Siang district of Arunachal Pradesh. Some methods can be considered as traditional as well as non-traditional since they are well known in some other states ...
Wetlands play an undebatable role in regulating the global climate, hydrological cycle and ecosys... more Wetlands play an undebatable role in regulating the global climate, hydrological cycle and ecosystem diversity; and, therefore, must be preserved and conserved. Conversely, global wetland area and water quality has since been declining (c 87% around the globe since 1700 AD), mainly due to human interference accompanied by natural succession process. Under this backdrop, physical, chemical, biological and ichthyologic features and fisher folk (following standard procedures of study) of the Asian wetland Sone Beel has been focused as a typical case study in the global scenario. Threats to the to Ramsar sites along with their categorization has also been discussed on a global scenario.
The present study was conducted on Burundian coast of Lake Tanganyika in 4 sampling sites to iden... more The present study was conducted on Burundian coast of Lake Tanganyika in 4 sampling sites to identify and to estimate the spatial abundance of zooplankton community and to analyze whether physicochemical properties of water influence significantly the occurrence of zooplankton population. During the survey, it has been realized that zooplankton organisms were very few in number and taxonomic diversity and was comprising of 3 orders: Cyclopoida, Calanoida (Copepods) and Cladocera represented by Diaphanosoma. 12species belonging to 4families have been noted from all study sites. The relative diversity index of families revealed that the family Diaptomidae was dominant with 5species (41.7%) followed by family Cyclopidae with 4species (33.3%), then family Sididae with 2species (16.7%) while the Temoridae family was last with a single species (8.3%)<br> The results of species richness and the Cumulative abundance of the sampling sites showed that zooplankton species and density wer...
River Siang is the main river of East Siang district and also it is one of the most important tri... more River Siang is the main river of East Siang district and also it is one of the most important tributary of the mighty River Brahmaputra drainage system. River Siang plays an important role in lives of the surrounding inhabitants viz. fishing, bathing, washing, disposal, industrial wastes, and other human activities and most importantly the water of River Siang are uses by PHE of East Siang district for drinking purpose of water. Assessments of physico-chemical parameters were carried out during 2012 to 2014 in the six different study sites of River Siang. A major and important different water quality parameters were measured in all collected samples, including Water Colour, Air Temperature, Water Temperature, pH, DO, FCO 2, Conductivity, Total alkalinity, Turbidity, Total hardness, TSS and TDS. The results that are recorded in the different stations are compared with the different seasons and also with the different year. An analysis of the drainage network of a part of River Siang ...
Transylvanian Review of Systematical and Ecological Research, 2020
The Jinam River habitats inventory revealed the presence of alluvial valley, cascades, riffle-poo... more The Jinam River habitats inventory revealed the presence of alluvial valley, cascades, riffle-pools, boulders, cobbles, and gravel as types of substrata. The limnological parameters portrayed average values of air and water temperature, turbidity, pH, dissolved oxygen, free carbon di-oxide, total alkalinity, and conductivity. This recent pioneering study on the fish of the Jinam River in the Dima Hasao District of Assam revealed the presence of 18 species belonging to 15 genera, five families, and three orders, which are reported for the first time through this paper. Worth highlighting is the abundance of Barilius bendelisis and Devario aequipinnatus, and the fewer numbers of Chanda nama, these warranting proper management and conservation of the fish for this river.
The length-weight relationship of Neolissochilus hexagonolepis (McClelland) and Garra lissorhynch... more The length-weight relationship of Neolissochilus hexagonolepis (McClelland) and Garra lissorhynchus (McClelland), collected from Jatinga river in Assam, have been studied. Based on 50 specimens of N.hexagonolepis (70-270 mm) and 72 specimens of G.lissorhynchus (47-94mm), the regression equation was calculated to be Log W=-2.882 + 1.922 Log L and Log W=-5.171 + 3.152 Log L respectively for the two species of fishes. The computed ‘t’ values indicated that ‘n’ value of N.hexagonolepis is significantly different from the expected value of ‘3’. The relative condition factor (Kn) remained greater than 1 for N.hexagonolepis and G.lissorhynchus indicating their good well being.
The unique topography of North East (NE) India and watershed pattern is an attractive field for I... more The unique topography of North East (NE) India and watershed pattern is an attractive field for Icthyological studies. This region has already been recognized as a global spot of freshwater fish diversity. The study was conducted on fish diversity and physico-chemical parameters during January 2015 to May 2015 in River Bhogdoi, one of the south bank sub-tributaries of the mighty River Brahmaputra. A total 30 species of fishes under 26 genera, 5 orders and 16 families were recorded form the River Bhogdoi. Cypriniformes were found to be the most abundant group while Synbranchiformes and Beloniformes were less abundant groups during the whole study period. The study of physico-chemical parameters of River Bhogdoi revealed that, the river water appeared to be less polluted and physico-chemical parameters were mostly found to be in the favourable and suitable ranges for the aquatic organisms. The results that were recorded in the different stations and different seasons were compared wit...
Infection with trematode parasites can lead to severe change in nutrient content and may result i... more Infection with trematode parasites can lead to severe change in nutrient content and may result in host mortalities and character of a water body may influence the parasitic fauna. Hence a study was carried out from 2010 to 2011 to find out a correlation of water’s physic-chemical characteristics and trematode parasites of Channa punctata (Bloch) in Awangsoi Lake, Manipur, India. During the present investigation three species of trematodes were recorded. In the present study there were concurrent infections by two or more parasite species. The percentage of infection was positively correlated with temperature, pH, DO and conductivity in Awangsoi Lake. There was a significant positive correlation (r = 0.652; p<0.05) with FCO2 and a negative correlation with alkalinity. Seasonal variation in the occurrence of these parasites may be attributed to ecological conditions, particularly distribution of intermediate hosts and also the age of the host and the life cycle of the parasite spe...
The present investigation deals with a systematic survey of trematode parasites of air breathing ... more The present investigation deals with a systematic survey of trematode parasites of air breathing fishes from Awangsoi Lake collected during 2008-2009. The air breathing fishes found in Awangsoi Lake are Channa punctatus, Clarias batrachus, Channa striatus, Channa orientalis, Anabas testudineus and Heteropneustes fossilis. During the study period the following 5 species of trematodes were collected : Clinostomum complanatum, Allocreadium handia, Allocreadium fasciatusi, Astiotrema reniferum and Genarcopsis goppo. The percentage of abundance was found to be maximum in Astiotrema reniferum and Anabas testudineus harbours the maximum number of parasites.
The present commentary deals with the diversity of rotifers from three different habitats that in... more The present commentary deals with the diversity of rotifers from three different habitats that include a river, lake and an irrigation canal from Manipur, India. Using the samples (n = 288) spanning over a 2-year period the species richness and the abundance of rotifers were assessed. A total of 34 species of rotifers from 11 families were observed with varying relative abundance, with the diversity indices (Shannon–Wiener, H’) ranging between 2.98 and 3.23. The species composition of the three habitats differed considerably, as evident from the multivariate analysis. In the lake habitat, the dominant species was Brachionus calyciflorus (7.9%), while in the irrigation canal the dominant species was Brachionus ruben (10.4%), and for the river habitat the dominant species was B. calyciflorus (11.5%). Using relative abundance of the rotifer species as explanatory variables, the ordination of the 34 species yielded significant differences based on the similarity in the abundance over the sampling period. On the basis of the overall differences in the species composition of rotifers, the three habitats could be segregated significantly (P < 0.05) based on the discriminant function analysis. Although the species composition of rotifers remained similar to other freshwater bodies of the this geographical region, the diversity and community analysis suggested considerable differences with reference to the three habitats, implying significance for limnological management.
Zooplankton form a food support of any aquatic ecosystem, and have been reported in percentage co... more Zooplankton form a food support of any aquatic ecosystem, and have been reported in percentage composition of different groups. The diversity of various types of zooplankton was studied and the result revealed that the zooplankton was represented by various genera viz., cladocera, rotifera, copepoda and ostracoda. The numbers of varieties of group rotifera have been reported maximum but the percentage amount of cladocera group followed by rotifera in general. The range of total zooplankton between 253 No-ml to 622 No-ml and average was 430.42 No-ml. The annual percentage composition of various representative groups revealed 38.84% cladocera, 37.13% rotifera, 23.56% copepoda and 0.46% ostracoda. The detailed aspect of seasonal variation, percentage composition and diversity of zooplankton is discussed herein.
Study was carried out from June 2012 to July 2013 in a 58 km stretch of the river Siang in Arunac... more Study was carried out from June 2012 to July 2013 in a 58 km stretch of the river Siang in Arunachal Pradesh, India to determine ichthyofaunal diversity in this section of the river. The study revealed the presence of 82 species of fishes belonging to 8 orders, 24 families and 53 genera. Species representing the order Cypriniformes dominated the ichthyofauna while those representing Tetradontiformes are in less number.
Fish is one of the best sources of animal protein of the food. Fishing and hunting are the oldest... more Fish is one of the best sources of animal protein of the food. Fishing and hunting are the oldest profession of all mankind since man began his search of food. Traditional fishing catching devices which were operated in River Siang, Arunachal Pradesh have been studied with respect to its operation, structure and productivity. The small depicted work highlight 13 different types fish catching devices, which have been classified into 5 different types viz., (i) Encircling Gear (Khewali Jal, Angtha Jal and Ber Jal or Jeng Jal) (ii) Entangling Gear (Langi or Current Jal and Phansi Jal) (iii) Scooping Gear (Sip Jal and Thela Jal) (iv) Hooks and Line fishing (Nal Barshi and Doogabanshi) (v) Traps (Chepa, Dingora, Polo, and Kholaha). The present study was carried out from June 2012 to July 2013 in a 58km stretch of River Siang in East Siang district of Arunachal Pradesh. Some methods can be considered as traditional as well as non-traditional since they are well known in some other states ...
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