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Estuaries

, Volume 4, Issue 2, pp 127–138 | Cite as

Spawning of major carps in the lower Halda River, Bangladesh

  • Chu-fa Tsai
  • M. Nazrul Islam
  • Rezaul Karim
  • K. U. M. Shahidur Rahman
Article

Abstract

Spawning biology and spawn fishery of three valuable species of Indian major carps,Catla catla, Labeo rohita andCirrhinus mrigala, in the lower Halda River, Bangladesh, were studied in 1978. The major carps spawned only in the Sonairchar oxbow-bend from April to June on or near the dates of the full moon and the new moon. The tide was then at its highest level, and there was heavy flood water runoff from the hill region with sharp increases in water level, turbidity and current velocity, as well as decreases in water temperature, dissolved oxygen, and hydrogen ion concentration. These three heterogeneric species, as a result of parallelism or convergence in evolution, overlap in their environmental requirements for spawning. The nursery ground of the major carp fry spawned in the Halda River was found to be in the Bay of Bengal. The brood stock origin is suspected to be at the Shankha River, 40 miles south of the Karnafuli River. The spawn fishery in the Halda River was intensive but inefficient. Engineering works and water management schemes are threatening the spawning habitat.

Keywords

Current Velocity High Tide Hill Region Full Moon Dissolve Oxygen Content 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Estuarine Research Federation 1981

Authors and Affiliations

  • Chu-fa Tsai
    • 1
  • M. Nazrul Islam
    • 2
  • Rezaul Karim
    • 2
  • K. U. M. Shahidur Rahman
    • 2
  1. 1.Chesapeake Biological Laboratory Center for Environmental and Estuarine StudiesUniversity of MarylandSolomonsUSA
  2. 2.Karnafuli Irrigation Fisheries Development Project directorate of FisheriesChittagongBangladesh

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