Length-weight relationships (LWRs) of 12 Indian freshwater fish species from an un-impacted tropical river of Central India (River Ken)

Dubey, Vineet Kumar; Sarkar, Uttam Kumar; Kumar, Ravi; Mir, Javaid Iqbal; Pandey, Ajay Kumar; Lakra, W. S.

doi:10.1111/j.1439-0426.2012.02005.x

Cited by 14 publications

(10 citation statements)

References 7 publications

(15 reference statements)

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“…regions, our study showed a reasonably high diversity of freshwater fishes for even lower order reaches, comparable with somewhat larger sized rivers across India [45], [58][59][60]. Despite being more than 1,200 km.…”

Section: Plos Onesupporting

confidence: 60%

Temporal and environmental drivers of fish-community structure in tropical streams from two contrasting regions in India

Mondal

Bhat

2020

PLoS ONE

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Environmental and anthropogenic factors are known to drive fish community structure in aquatic systems across the world. This study investigates fish assemblages in lower order streams across contrasting landscapes in central and eastern India. We documented the species diversity of these monsoon driven lower order streams in the two regions. We also investigated the potential common environmental drivers of richness and diversity and effect of season in these tropical streams. The study was based on seasonal data on abundance of fishes and environmental parameters collected between 2015-2017 from streams in states of Madhya Pradesh and West Bengal. Species diversity were compared across regions and seasons, based on their richness (SR) as well as diversity (Shannon index H'). Drivers of overall richness and diversity were analyzed using multiple linear regression methods, based on best subset selection. Analysis of data revealed high diversity in these streams in both regions. Cyprinidae, Bagridae and Channidae were the most dominant families in both regions. Despite the geographical and local ecological differences across the regions, common environmental parameters were found to influence richness and diversity across the two regions, indicating these as being key drivers of fish community structure. Water flow was a common factor driving both richness and diversity across both regions. Our study revealed a lack of seasonal effect in structuring fish communities in tropical streams. With stream and river ecosystems facing increasing threats due to habitat alterations and water quality degradation in countries such as India, a clear understanding of regional and local drivers of community structure of aquatic fauna is crucial. These results on the role of common environmental factors across ecoregions provides baseline information for understanding their ecological roles and developing management plans for important river basins and fish conservation in future.

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Section: Plos Onesupporting

confidence: 60%

Temporal and environmental drivers of fish-community structure in tropical streams from two contrasting regions in India

Mondal

Bhat

2020

PLoS ONE

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“…Phosphate values are usually 0.005 to 0.020 mg/L in most natural surface waters; high concentrations can pollution and are mainly responsible for eutrophication [35]. Nutrients such as nitrogen and phosphates compounds in water stimulate the growth of algae and other photosynthetic aquatic life [57].…”

Section: Discussionmentioning

confidence: 99%

Water Quality and Plankton Assessment of Eme River, Umuahia, Southeast Nigeria

Anyanwu

Adetunji

Umeham

2021

Preprint

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Certain anthropogenic activities have negative impacts on the aquatic ecosystems. Plankton are sensitive to their environment and are used to monitor anthropogenic impacts. A South-eastern Nigeria River was studied from December 2017 to November 2018 in 6 stations; to assess the plankton community, water quality and anthropogenic impacts. The river was subjected to intense sand mining activities among other activities. The plankton was sampled with filtration method while water was collected and analysed using standard methods. A total of 36 phytoplankton species and 27 zooplankton species were recorded with Chlorophyceae and Rotifers being the most abundant groups. The most abundant species - Melosira granulata (phytoplankton) and Daphnia pulex (zooplankton) are pollution indicators. Some of the physicochemical parameters showed that the river was perturbed by the anthropogenic activities in the watershed. However, the plankton assemblage and community structure gave an indication of a stable environment; though the zooplankton fauna showed some level of stress. The impacts of sand mining activities on water quality and plankton were more in the downstream stations (4–6) where sand mining was intense while perturbation from swimming children and related activities were observed in station 1 especially during the dry season. The presence of eutrophic indicators and tolerant species showed that the river was tending towards eutrophication. Sand mining activities contributed to the nutrient enrichment of the river. CCA showed the major water quality parameters that influenced the plankton community structure. There is need to regulate illegal sand mining activities in the river.

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“…Phosphate values in most natural surface waters usually range between 0.005 and 0.020 mg/l (Chapman, 1996). Nutrients such as nitrogen and phosphates compounds have been implicated in the eutrophication of water bodies because they stimulate growth of algae and other photosynthetic aquatic life (Dubey et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Macroinvertebrates as bioindicators of Water Quality of Effluent-receiving Ossah River, Umuahia, Southeast Nigeria.

2019

ZJPAS

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Bioindicators are biological organisms that can be used to monitor the quality of the environment. Macroinvertebrates are known to be extremely sensitive to organic pollutants coupled with their wide distribution, ease and minimal cost of sampling which makes them perfect bioindicators. Macroinvertebrate fauna of an effluent-receiving River Southeast Nigeria was studied in 3 stations between January and June 2018; to assess their community structure in relation to effluent discharge and other anthropogenic activities. The modified kick sampling technique and sweeping of aquatic macrophytes with hand net were used in the sampling of the macroinvertebrates. Five taxonomic groups and twenty (20) taxa were recorded; contributing 119 macroinvertebrate individuals. The composition of the taxa showed that non-biting midge, Chironomus sphad the highest number (39.5%). In terms of spatial distribution, the highest number of individuals (57) was recorded in station 2 while stations 3 and 2 had 37 and 25 individuals respectively. The macroinvertebrates fauna was dominated by tolerant species (75%). The diversity indices as reflected in Shannon-Wiener index (H) (1.717-1.923), Magalef Species Richness (2.769-2.968) and Evenness index (0.4285-0.6843) were low indicating lower number of species and environmental degradation due to anthropogenic impacts. The physicochemical parameters and macroinvertebrate assemblages showed that the river was adversely impacted by effluent discharge and other anthropogenic activities. The physicochemical parameters showed that station 1 was polluted by cumulative impacts while macroinvertebrate assemblages showed that station 2 was polluted by effluent discharge.

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Length-weight relationships (LWRs) of 12 Indian freshwater fish species from an un-impacted tropical river of Central India (River Ken)

Cited by 14 publications

References 7 publications

Temporal and environmental drivers of fish-community structure in tropical streams from two contrasting regions in India

Temporal and environmental drivers of fish-community structure in tropical streams from two contrasting regions in India

Water Quality and Plankton Assessment of Eme River, Umuahia, Southeast Nigeria

Macroinvertebrates as bioindicators of Water Quality of Effluent-receiving Ossah River, Umuahia, Southeast Nigeria.

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