An observation on the early maturation of Tenualosa ilisha in river Ganga: a case study from Farakka, West Bengal


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Authors

  • SANATAN BERA ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata-700 120, West Bengal, India
  • ADIPTA CHAKRABORTY ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata-700 120, West Bengal, India
  • BASANTA KUMAR DAS ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata-700 120, West Bengal, India
  • AMIYA KUMAR SAHOO ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata-700 120, West Bengal, India
  • SANATAN PAUL ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata-700 120, West Bengal, India
  • ARCHISMAN RAY ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata-700 120, West Bengal, India
  • NABA KUMAR ACHARJIYA ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata-700 120, West Bengal, India
  • KARMVEER SINGH ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata-700 120, West Bengal, India
  • SHAILENDRA KUMAR ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata-700 120, West Bengal, India

https://doi.org/10.56093/jifsi.v57i4.2025.179056

Keywords:

Early maturation, GSI, Reproductive traits, Tenualosa ilisha

Abstract

The present study investigated the reproductive traits of Tenualosa ilisha during the winter breeding season (November 2024-February 2025) downstream of the Farakka Barrage, Ganga River. A total of 310 individuals were randomly collected during the study period, with males ranging from 14 to 21.9 cm and females ranging from 14.8 to 20.1 cm, respectively. Monthly variations in morphometric traits, gonadosomatic index (GSI) in males and females, and fecundity were analyzed in female specimens below the minimum legal size. Gonadal maturation revealed a progressive increase from November to February, with significantly higher GSI observed in males and females and fecundity observed in females. Both absolute and relative fecundity increased toward February, indicating peak maturation. The results suggest early maturation and highlight winter as an active reproductive phase of Hilsa in the study region.

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Submitted

2026-05-15

Published

2026-09-01

Issue

Vol. 57 No. 4 (2025): Journal of Inland Fisheries Society of India

Section

Articles

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How to Cite

BERA, S., CHAKRABORTY, A., DAS, B. K., SAHOO, A. K., PAUL, S., RAY, A., ACHARJIYA, N. K., SINGH, K., & KUMAR, S. (2026). An observation on the early maturation of Tenualosa ilisha in river Ganga: a case study from Farakka, West Bengal. Journal of the Inland Fisheries Society of India, 57(4), 407-416. https://doi.org/10.56093/jifsi.v57i4.2025.179056