Hydrobiologia

, Volume 166, Issue 3, pp 277–283

Introduction and cage culture of exotic carps and their impact on fish harvested in Lake Begnas, Nepal

  • D. B. Swar
  • T. B. Gurung
Article

DOI: 10.1007/BF00008137

Cite this article as:
Swar, D.B. & Gurung, T.B. Hydrobiologia (1988) 166: 277. doi:10.1007/BF00008137

Abstract

The suitability of exotic carps namely Aristichthys nobilis (Bighead carp), Hypophthalmichthys molitrix (Silver carp), Ctenopharyngodon idellus (Grass carp), Cyprinus carpio (Common carp) and Labeo rohita (Rohu) in a sub-tropical lake was evaluated. The impact of their introduction on native fishes was also studied. After the introduction and cage culture of exotic carps the total harvest reached 92 kg·ha−1; an increase of 266% within eight years. The planktivorous bighead and silver carps were most successful. The harvest of the other three species was poor. Since the introduction of exotic carp the harvest of indigenous fishes declined by 42%. Considering the food habits of these fish, further stocking should be limited to bighead and silver carps to limit the adverse effects on the indigenous species.

Key words

Begnas Lake Aristichthys nobilis Hypophthalmichthys molitrix cage culture exotic carps Pokhara Valley 

Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • D. B. Swar
    • 1
  • T. B. Gurung
    • 1
  1. 1.Fisheries Development CenterBaidam, PokharaNepal
  2. 2.Otsu Hydrobiological StationKyoto UniversityShigaJapan

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