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March 13, 2026SHILAP Revista de lepidopterologíaOpen Access

Spatial variation in the otolith shape of Asian sheat catfish, Wallago attu (Bloch & Schneider, 1801) populations from five Indian rivers

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Authors

GKG. KumarAKANKUR KASHYAPMSMohammad Serajuddin

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Overview

Investigates otolith shape variation in Wallago attu populations, indicating different stocks across rivers.

Key Points

  • The aim is to explore the otolith shape variations in Wallago attu populations from five Indian rivers to assess stock structure.
  • Utilized univariate and multivariate statistical techniques to analyze otolith shape.
  • Performed elliptical Fourier analysis on contour shapes of otoliths.
  • Conducted principal component analysis on normalized elliptical Fourier descriptors.
  • Applied discriminant function analysis for stock classification.
  • Found significant differences in otolith descriptors among fish from different rivers (ANOVA, p<0.05).
  • Principal component analysis accounted for 89.55% of total variance in otolith shape.
  • Achieved a 100% classification rate through discriminant function analysis, showing no intermixing between river populations.

Cite This Study

Kumar et al. (2026) studied this question.

synapsesocial.com/papers/69b3aaa802a1e69014ccb70dhttps://doi.org/10.17017/j.fish.1021
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