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Scale surface topography of a vulnerable cyprinid fish, Schizothorax plagiostomus from Kashmir Himalayas using Scanning Electron Microscopy (SEM)
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  • Misba Rehman,
  • Syed Talia Mushtaq,
  • Tasaduq Hussain Shah,
  • Farooz Ahmad Bhat
Misba Rehman
Sher-E-Kashmir University of Agricultural Sciences and Technology Kashmir Faculty of Fisheries
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Syed Talia Mushtaq
Sher-E-Kashmir University of Agricultural Sciences and Technology Kashmir Faculty of Fisheries

Corresponding Author:syedtalia2020@gmail.com

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Tasaduq Hussain Shah
Sher-E-Kashmir University of Agricultural Sciences and Technology Kashmir Faculty of Fisheries
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Farooz Ahmad Bhat
Sher-E-Kashmir University of Agricultural Sciences and Technology Kashmir Faculty of Fisheries
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Abstract

Scanning electron microscopy (SEM) has significantly advanced morphological studies, particularly in the investigation of fish scale structures. This technique has unveiled intricate architectural details that are crucial for fish identification and classification. In this study, macro- and microscopic analyses were employed to examine the scale morphology of Schizothorax plagiostomus, a vulnerable cyprinid fish from Kashmir, focusing on two body regions (key scales, which were taken from the region below dorsal fin and above lateral line; lateral line scales which were taken from the lateral line). The general scale type observed in Schizothorax plagiostomus was cycloid. Two types of shapes viz., polygonal and cordate were reported in this species. The rostral margin of the scales displayed round and waved forms. The scales exhibited a small and round focus which was antero-centrally positioned. The scales featured narrow or wide grooves (radii) categorized into three types: primary, secondary, and tertiary, present across all four scale fields (anterior, posterior, nuand lateral), forming a tetra-sectioned type. Circuli, arranged in circular patterns around focus were present which were densely placed in anterior and lateral field and widely spaced in posterior field. Notably, lepidonts on the circuli and chromatophores on the posterior margin were absent in this species. These scale characteristics and their morphologies offer a valuable tool for the identification, classification, and phylogenetic analysis of various freshwater fish species and genera.
07 Aug 2024Submitted to Microscopy Research and Technique
07 Aug 2024Submission Checks Completed
07 Aug 2024Assigned to Editor
22 Sep 2024Review(s) Completed, Editorial Evaluation Pending
01 Oct 2024Reviewer(s) Assigned