Studies on periphyton grazing rate of Labeo calbasu (Hamilton)


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Authors

  • M M Rahman Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
  • M M Haque Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
  • N T Narejo Department of Fresh Water Biology and Fisheries, University of Sindh, Jamshoro, Sindh, Pakistan
  • S Islam Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
  • S M Rahmatullah Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh

Abstract

Studies were undertaken to investigate the grazing rate of Labeo calbasu on periphyton for a period of ten months from July 1998 to April 1999. It was observed that periphyton density
significantly (p<0.05) influenced the grazing rate of L. calbasu. The lowest (0.0039 dmg/fish/4h)and highest (0.1037mg/fish/4h) grazing rates in the same size group of fish were found at 1 slide/aquarium (100 cm2) and 4 slides/aquarium (400 cm2) respectively. Similarly, size group of
fish significantly (p<0.05) influenced the grazing rate. The lowest (0.0030 dmg/fish/4h) and the highest (0.0826 dmg/fish/4h) grazing rates were observed in smaller size and larger size group of fish respectively. However, significantly (p<0.05) high grazing rate (0.155 dmg/fish/4h) was
observed in group than individual fish (0.060 dmg/fish/4h). The grazing rate was also significantly (p<0.05) influenced by time duration

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Author Biographies

  • M M Rahman, Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
    Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
  • M M Haque, Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
    Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
  • N T Narejo, Department of Fresh Water Biology and Fisheries, University of Sindh, Jamshoro, Sindh, Pakistan
    Department of Fresh Water Biology and Fisheries, University of Sindh, Jamshoro, Sindh, Pakistan
  • S Islam, Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
    Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
  • S M Rahmatullah, Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
    Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh

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Issue

Vol. 54 No. 4 (2007)

Section

Articles

License

The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Rahman, M. M., Haque, M. M., Narejo, N. T., Islam, S., & Rahmatullah, S. M. (2011). Studies on periphyton grazing rate of Labeo calbasu (Hamilton). Indian Journal of Fisheries, 54(4), 365-369. https://epubs.icar.org.in/index.php/IJF/article/view/6962