Species Diversity, Distribution and Abundance of Fishes of Seti Gandaki River Basin, Pokhara, Nepal

Authors

  • Kishor K. Pokharel Prithvi Narayan Campus, Pokhara, Nepal
  • Khadga B. Basnet Tribhuvan University, Kathmandu, Nepal
  • Trilok C. Majpuria Tribhuvan University, Kathmandu, Nepal
  • Chitra B. Baniya Tribhuvan University, Kathmandu, Nepal

DOI:

https://doi.org/10.3126/hebids.v8i1.40234

Keywords:

Cyprinids, diversity indices, lotic habitat, urban influence

Abstract

Species diversity with indices, distribution and abundance of fishes of Seti Gandaki River Basin, Pokhara, Nepal are described from five study sites, three along the main channel and two in major tributaries. Fishes were sampled using a cast-net following pass-removal method. Environmental variables were determined following the standard methods. In total, 30 species belonging to five orders, nine families and 24 genera with absolute abundance of 10,659 were recorded. A longitudinal pattern of distribution and species richness from upstream to downstream sites (17 to 21 species) was observed. Cyprinids were dominant followed by silurids, balitorids, channids, mastacembelids, belonids and cobitids. Distribution pattern and abundance data showed that the species Tor tor, Tor putitora, Chaguninus chagunio, Barilius barila, Opsarius barna, Danio rerio, Lepidocephalichthys guntea, Parachiloglanis hodgarti and Amblyceps mangois were not common in the study area. The environmental variables such as depth, width, discharge and temperature showed effect upon species richness, abundance, distribution and diversity indices, which had lower values at upstream pre-urban sites than at downstream post-urban sites. A sharp decline in species richness, abundance and diversity indices at urban site (10 species) indicated urban influence.

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Author Biographies

Kishor K. Pokharel, Prithvi Narayan Campus, Pokhara, Nepal

Department of Zoology

Khadga B. Basnet, Tribhuvan University, Kathmandu, Nepal

Central Department of Zoology

Trilok C. Majpuria, Tribhuvan University, Kathmandu, Nepal

Central Department of Zoology

Chitra B. Baniya, Tribhuvan University, Kathmandu, Nepal

Department of Botany

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Published

2020-12-31

How to Cite

Pokharel, K. K., Basnet, K. B., Majpuria, T. C., & Baniya, C. B. (2020). Species Diversity, Distribution and Abundance of Fishes of Seti Gandaki River Basin, Pokhara, Nepal. Himalayan Biodiversity, 8(1), 5–14. https://doi.org/10.3126/hebids.v8i1.40234

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Articles