Intra‐annual changes in reproductive indices of male and female Himalayan snow trout, Schizothorax richardsonii (Gray, 1832)

2020 ◽  
Vol 52 (1) ◽  
pp. 130-141
Author(s):  
Alexander Ciji ◽  
Prakash Sharma ◽  
Manchi Rajesh ◽  
Biju S. Kamalam ◽  
Annu Sharma ◽  
...  
Keyword(s):  
Male And Female ◽  
Snow Trout ◽  
Schizothorax Richardsonii ◽  
Annual Changes ◽  
Reproductive Indices

Morphometric and molecular identification of Argulus japonicus (Thiele 1900) in vulnerable Himalayan snow trout, Schizothorax richardsonii (Gray 1832)

2021 ◽  
Author(s):  
Ritesh Shantilal Tandel ◽  
Khangembam Victoria Chanu ◽  
Raja Aadil Hussain Bhat ◽  
Pragyan Dash ◽  
Tarang Kumar Shah ◽  
...  
Keyword(s):  
Molecular Identification ◽  
Snow Trout ◽  
Schizothorax Richardsonii

scholarly journals Morphological Divergence of Snow Trout (Schizothorax Richardsonii, Gray 1932) from Rivers of Nepal with Insights from a Morphometric Analysis

2015 ◽  
Vol 3 (3) ◽  
pp. 464-473
Author(s):  
Suresh Kumar Wagle ◽  
Neeta Pradhan ◽  
Madhav Kumar Shrestha
Keyword(s):  
Size Variation ◽  
Principal Component ◽  
Head Region ◽  
Body Depth ◽  
Morphometric Characters ◽  
Significant Difference ◽  
Snow Trout ◽  
Major River ◽  
Mean Vectors ◽  
Schizothorax Richardsonii

Asala or snow trout (Schizothorax richardsonii, Cyprinidae), one of highly valued freshwater fish of Transhimalayan regions, is distributed in upper reaches of all major river systems of Nepal. Morphometric diversification between six river populations of S. richardsonii was examined to identify intraspecific unit for enabling better management of the resources. Significant differences were observed in 17 measured morphometric characters of 207 specimens among the six river populations. Multivariate analysis of variance (Wilks' test) indicated a significant difference for mean vectors of mophometric measurements (? =0.012, F85, 731 = 19.999, P<0.0001) among populations. Principal component and discriminant functions (DFs) analysis of morphometric measurements revealed high seperation of the stocks. The analysis showed that most of the shape and size variation among these populations occurs in the head region, body depth and fin length. Apparent morphometric divergence among S. richardsonii samples showed the existence of three differentiated groups viz., the Indrawati and Khudi populations, the Melamchi and Phalaku Rivers, and the Sabha and Tadi River populations of Nepal. The results of this study may be useful in fisheries management and potential exploitation of this species in coldwater aquaculture.Int J Appl Sci Biotechnol, Vol 3(3): 464-473

scholarly journals Is there always space at the top? Ensemble modeling reveals climate-driven high-altitude squeeze for the vulnerable snow trout Schizothorax richardsonii in Himalaya

2021 ◽  
Vol 120 ◽  
pp. 106900 ◽  
Author(s):  
Aashna Sharma ◽  
Vineet Kumar Dubey ◽  
Jeyaraj Antony Johnson ◽  
Yogesh Kumar Rawal ◽  
Kuppusamy Sivakumar
Keyword(s):  
High Altitude ◽  
Ensemble Modeling ◽  
Snow Trout ◽  
Schizothorax Richardsonii

scholarly journals Schizothorax richardsonii dsRNA dependent protein kinase has three double-stranded RNA binding motifs with a promoter lacking conserved kinase sequence

2019 ◽  
Author(s):  
Ankur Saxena ◽  
Kiran Belwal ◽  
Preeti Chaturvedi ◽  
Amit Pande
Keyword(s):  
Protein Kinase ◽  
Rna Binding ◽  
Core Promoter ◽  
Coding Region ◽  
Dependent Protein Kinase ◽  
Binding Motifs ◽  
Double Stranded Rna ◽  
Snow Trout ◽  
Dependent Protein ◽  
Schizothorax Richardsonii

Abstract Background: Double stranded RNA (dsRNA) dependent protein kinase (PKR) is an interferon (IFN) stimulated antiviral protein. It inhibits protein synthesis by phosphorylation of the eukaryotic translation initiation factor 2-alpha (eIF2-α) by its serine-threonine kinase activity that prevents virus replication. This is the first report on the in silico analysis of PKR coding region and its promoter from a Coldwater fish of the Indian Himalayan region. Snow trout, Schizothorax richardsonii is an important Coldwater food fish. It is being over fished and therefore requires conservation. Being a vulnerable species it is listed under the red list of IUCN. Here we discuss the identification, cloning and sequencing of PKR coding region and its promoter. Results: We have revealed the complete coding region of dsRNA dependent protein kinase (PKR) and its promoter from Schizothorax richardsonii , one of the several species of snow trout inhabiting sub-Himalayan fresh water bodies. An amplicon of 2884bp containing 5ʹ and 3ʹ untranslated regions (UTR) of 234 and 558 bases was obtained while the deduced open reading frame (ORF) of 2076 bases encoded a polypeptide of 691 amino-acids. Snow trout PKR protein contains three double stranded RNA binding motifs (dsRBM) at N terminal, besides possessing a serine/threonine protein kinase and a C terminal catalytic domain. Moreover, a stretch of 791 nucleotide bases was identified as the promoter upstream the ORF. The identified promoter has two interferon stimulated response elements (ISRE) besides the presence of core promoter elements. Moreover, the snow trout PKR promoter has a TATA box but lacks kinase conserved sequence (KCS) that is present in mammalian PKR promoters. Conclusion: The promoter of snow trout was identified as a stretch of 791 nucleotide bases. It has two interferon-stimulated response elements (ISRE) besides core promoter elements. Intriguingly, unlike the mammalian PKR promoter, the snow trout PKR promoter has a TATA box but lacks the conserved kinase sequence (KCS) present in human counterpart. Keywords: Schizothorax richardsonii , Interferon Stimulated Genes, PKR protein, Antiviral state, Homology modeling, dsRNA binding protein kinase

Morphological and molecular characterization of Saprolegnia spp. from Himalayan snow trout, Schizothorax richardsonii: A case study report

Aquaculture ◽  
2021 ◽  
Vol 531 ◽  
pp. 735824
Author(s):  
Ritesh Shantilal Tandel ◽  
Pragyan Dash ◽  
Raja Aadil Hussain Bhat ◽  
Prakash Sharma ◽  
Kavya Kalingapuram ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Study Report ◽  
Snow Trout ◽  
Case Study Report ◽  
Schizothorax Richardsonii ◽  
Morphological And Molecular Characterization

scholarly journals INFESTATION OF NEMATODE PARASITE FILOCHONA TELEOSTEI IN RELATION TO SIZE, WEIGHT AND AGE OF SNOW TROUT SCHIZOTHORAX RICHARDSONII (GRAY)

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Omveer Singh ◽  
Shweta Panwar
Keyword(s):  
Statistical Analysis ◽  
Negative Correlation ◽  
Host Resistance ◽  
Worm Burden ◽  
Biotic Factors ◽  
Host Fish ◽  
Garhwal Himalayas ◽  
Nematode Parasites ◽  
Snow Trout ◽  
Schizothorax Richardsonii

Parasitological investigation was conducted to assess the effects of various biotic factors viz. length, weight and age of host on the infection patterns of Filochona teleostei (Singh & Malik, 1992) in snow trout Schizothorax richardsonii (HAM.) from hill streams of Garhwal Himalayas. The statistical analysis was carried out to calculate infection incidence, mean worm burden, regression values and their significance. About 20% fishes (18% male and 22% female) were found infected with nematode parasites. Infection patterns of Filochona teleostei revealed a negative correlation (r= - 0.347 to - 0.734) with length, (r= - 0.499 to - 0.671) with weight and (r= - 0.576) with age of host fish. The age immunity and stronger host resistance developed by the larger fishes are the possible reasons for the decrease in infection in larger and older fishes.

Occurrence ofIchthyophthirius multifiliis(White spot) infection in snow trout,Schizothorax richardsonii(Gray) and its treatment trial in control condition

2015 ◽  
Vol 49 (2) ◽  
pp. 227 ◽  
Author(s):  
Sumanta Kumar Mallik ◽  
Neetu Shahi ◽  
Partha Das ◽  
N.N. Pandey ◽  
R.S. Haldar ◽  
...  
Keyword(s):  
White Spot ◽  
Treatment Trial ◽  
Snow Trout ◽  
Schizothorax Richardsonii
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