Seasonal variation in density, distribution, and related parameters of helminth parasites in Labeo rohita of the Ganga River at Arrah (Bihar)

Authors

  • Oshin Thakur
  • Bibha Verma
  • Dina Nath Pandit

Keywords:

Parasites, Prevalence, Intensity, Abundance, Labeo rohita

Abstract

Background: The current investigation was conducted on the seasonal variations in the density, distribution, abundance, and intensity of helminth parasites in Labeo rohita collected from different sites along the Ganga River at Arrah, Bihar, India.

Materials and Methods: The host fish were found to parasitize five helminth parasites: Euceradium in the intestine, Camallunus in the stomach, Dactylogyrus and Haplioceidus in the gills, and Gyrodactylus in the skin. These parasites revealed seasonal fluctuation in their prevalence percentage, mean intensity, abundance, and index of infection..

Observations and Results: The yearly average prevalence of helminth parasites is 41.67%, with variations from 18.5% in winter to 61.0% in the monsoon. The mean abundance is 6.31, ranging from 2.52 in winter to 9.45 during the monsoon. The frequency index varies from 9.51 for the rare genus Camallanus to 33.03 for the common genus Haplocleidus. Additionally, the genus-wise frequency index ranged from 7.95 for Camallanus in winter to 33.48 for Haplocleidus in summer.


Conclusions: The observed seasonal variations have been attributed to temperature, feeding habits, and life patterns of the parasites. The present investigation concludes that the summer and monsoon seasons are the most susceptible seasons to parasitic attacks in Labeo rohita

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Published

2025-11-17

How to Cite

1.
Thakur O, Verma B, Pandit DN. Seasonal variation in density, distribution, and related parameters of helminth parasites in Labeo rohita of the Ganga River at Arrah (Bihar). J Neonatal Surg [Internet]. 2025Nov.17 [cited 2025Nov.25];14(8S):1101-4. Available from: https://www.jneonatalsurg.com/index.php/jns/article/view/9569

Issue

Vol. 14 No. 8S (2025): Journal of Neonatal Surgery

Section

Original Article

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