Ichthyological inventory of Lower Dibang Valley, Arunachal Pradesh, India

Gurumayum, Shantabala Devi

doi:10.47780/jifsi.53.1-2.2021.115774

Cited by 3 publications

(4 citation statements)

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“…Relatively higher values of free CO 2 were observed during pre-monsoon season (28.61 c ±0.597 mg/L at MB4). The results of the present findings are in conformity with the finding of Nath and Srivastava (2001) and Gurumayum et al (2002) who also have reported higher values of free CO 2 during pre monsoon season (28.61 c ±0.597 mg/L). Moreover, low values of free CO 2 was recorded in monsoon season (11.86 a ±0.267 mg/L at MB5) which complies with the findings of Das et al (2003) who reported low values of free CO 2 during monsoon in river Brahmaputra.…”

Section: Resultssupporting

confidence: 94%

Studies on Seasonal Variation of Water Quality Parameters of River Mara Bharali in Sonitpur District of Assam

Das¹,

Biswas²

2023

ASD

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Background: Freshwater is not only a finite resource but also essential for agriculture, industry and even human existence. The present investigation on seasonal water quality parameters was conducted in the remnants of old channel of river Jia Bharali called as Mara Bharali at Tezpur in the Sonitpur district of Assam from December, 2017 to November, 2020. Methods: Five sampling stations were selected that covers a stretch of 16.5 km. Physico-chemical parameters were determined seasonally by following the standard methods of APHA (1998) and Trivedy et al., 1987. The statistical analyses of the data were done by one way ANOVA using Statistical Package for Social Scientists. Result: TDS in monsoon in all the locations remained lowest (171.33a±3.059 mg/L at MB2) and highest in winter (320.11c±2.441 mg/L at MB3). The pH value is within the permissible limit except for site MB4 during the winter and post monsoon when the values were 6.38±0.146 and 6.44±0.039 respectively. Maximum DO of 7.878d±0.074 mg/L was observed at site MB1 during the winter season and minimum DO of 5.444a±0.047 mg/L was observed at site MB4 during the monsoon season. BOD was recorded below the tolerance limit of 3 mg/L in all sampling stations.

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Section: Resultssupporting

confidence: 94%

Studies on Seasonal Variation of Water Quality Parameters of River Mara Bharali in Sonitpur District of Assam

Das¹,

Biswas²

2023

ASD

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“…These were maximum in months of summer and minimum in winter with an average value of 258.33±108.36 mg/l. This pattern of fluctuations in TDS is in conformity with those of Gurumayum et al (2002). However, Rajurkar et al (2003) have reported minimum values of TDS during post monsoon.…”

Section: ± Sd = Standard Deviationsupporting

confidence: 82%

Algal population growth and dynamics of Asan Wetland

Khan¹,

Ishaq²,

Farooq³

2022

UJPAH

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A one year study of the phytoplankton community composition was carried out in the Asan wetland, a reservoir fed by River Yamuna in Uttarakhand India. In terms of bio-volume, phytoplankton community was generally dominated by Bacillariophyceae. Mean phytoplankton standing crops were highest in the wetland. The frequency and severity of algal blooms was increased significantly. To control their expansion, it was essential to identify the factors responsible for blooming of waters. Nutrient enrichment (mainly due to anthropogenic activities) and environmental factors (including the climate change) were considered the major catalyst for onset, proliferation and development of blooms. The phytoplankton of the Asan wetland was studied for one year with physical and chemical variables in relation to a pollution gradient. Analysis of the physical and chemical variables and phytoplankton density indicated that the wetland is experiencing heavy pressure of pollution due to anthropogenic activities. The dominant phytoplankton community mainly comprises of family, Chlorophyceae, Bacillariophyceae and Myxophyceae. Physical factors, though vital, had an indirect effect in facilitating the interaction among various available nutrients. In terms of phytoplankton density and diversity common genera observed include Chlorella, Chlaymydomonas, Spirogyra, Ulothrix, Hydrodictyon, Cladophora, Cosmarium, Chlorococcum, Oedogonium, Microspora, Desmidium, Chara, Zygenema, Syndesmus, Volvox, Ceratoneis, Amphora, Caloneis, Fragilaria, Navicula, Synedra, Diatoms, Gomphonema, Pinnularia, Melosira, Tabellaria, Denticula, Cymbella, Cyclotella, Nostoc, Anabaena, Oscillatoria, Rivularia, Coccochloris and Phormidium. Several genera were found most prominent during the study period having no seasonal impact on their abundance and variation. The spatial and temporal patterns observed in some of these dominant species were attributable to patterns in key environmental variables including temperature, flow, pH, dissolved oxygen and nutrient concentrations.

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“…Bacillariophyceae evolved as the most dominant group of periphyton in all the seasons and from upper, middle and lower stretch from Tamsa stream. Gurumayum et al, (2000), Daimari (2003), Liang and Li (2008), Singh and Das (2009), Baluni et al, 2017 also reported dominance of Bacillariophyceae in periphyton count. According to Hynes (1970), factors that influence the growth of periphyton population are light, temperature, water current, substrate, scoring effect of floods, water chemistry and grazing.…”

Section: Discussionmentioning

confidence: 96%

“…animal community was associated with the periphyton attached to the surface of the rocks. Animal community under periphyton was noticed by Gurumayum et al (2000) from the Subansiri river of Arunachal Pradesh.…”

Section: Discussionmentioning

confidence: 99%

Periphyton Community Structure of the Spring-fed Foot-hill Stream Tamsa Nadi from Doon Valley, Uttarakhand, India

Baluni,

Bahuguna,

et al. 2019

The Scientific Temper

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The periphyton diversity of the spring-fed foothill stream Tamsa Nadi from Doon Valley, Uttarakhand, India was studied during March 2020 to February 2021. The outcome of the present study was that 29 different genera of periphyton, of which 49% belonged to Bacillariophyceae, 37% to Chlorophyceae, 9% to Myxophyceae and 5% to Copepoda class. It was found that the periphyton diversity in Tamsa River, 29 genera were observed in Upper stretch, 23 in middle stretch and 16 in lower stretch. Bacillariophyceae was the most dominant group of periphyton observed in all the seasons and from all upper, middle and lower stretch from Tamsa stream

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Ichthyological inventory of Lower Dibang Valley, Arunachal Pradesh, India

Cited by 3 publications

References 0 publications

Studies on Seasonal Variation of Water Quality Parameters of River Mara Bharali in Sonitpur District of Assam

Studies on Seasonal Variation of Water Quality Parameters of River Mara Bharali in Sonitpur District of Assam

Algal population growth and dynamics of Asan Wetland

Periphyton Community Structure of the Spring-fed Foot-hill Stream Tamsa Nadi from Doon Valley, Uttarakhand, India

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