Proceedings of the Zoological Society

, Volume 71, Issue 1, pp 74–82 | Cite as

Effect of Dietary Incorporation of Dry-Powdered Water Hyacinth (Eichhornia crassipes) Meal on Growth and Digestibility of Labeo rohita Fingerlings

  • Dipesh Debnath
  • Sona Yengkokpam
  • B. K. Bhattacharjya
  • Pradyut Biswas
  • C. Prakash
  • M. P. S. Kohli
  • A. P. Sharma
Research Article


Keeping the importance and search for unconventional feed resources and/or standardizing their level of incorporation in mind, we incorporated dry-powdered water hyacinth (Eichhornia crassipes) meal in feeds and studied its effect on growth and digestibility in Labeo rohita fingerlings. Five feeds with 30 % crude protein level were formulated using Eichhornia meal (EM) at 0 (control), 5 (EMF1), 10 (EMF2), 15 (EMF3) or 20 % (EMF4) of the diet replacing rice bran by equal proportions. Three hundred fingerlings (7.40 ± 0.05 cm; 5.27 ± 0.12 g) were distributed into fifteen tanks (200 l capacity) and fed the experimental diets for 60 days. In the last 30 days, digestibility studies were conducted using 0.5 % chromic oxide as an external marker in feed. At 10 % inclusion of EM, the experimental fish showed the highest weight gain percent (WG%), specific growth rate (SGR), protein efficiency ratio and apparent net protein utilization with lowest feed conversion ratio. Whereas the growth performance at 15 % inclusion level was comparable with the control and further increase to 20 % level of EM showed reduced growth responses but the feed was fairly palatable to the fish. Lower digestibility was also observed in EMF4 group. It is concluded that EM can be included at 15 % level in the feed of L. rohita fingerlings without adversely affecting the growth, dry matter and nutrient digestibility. However, economic feasibility of this feedstuff needs to be analyzed to see whether the reduced cost of diets would compensate for the reduced performance of fish at higher inclusion levels.


Labeo rohita Eichhornia crassipes Digestibility Growth 



We thank the Director, ICAR-Central Inland Fisheries Research Institute (CIFRI), Barrackpore, Kolkata, India for the financial support to carry out the work; the Managing Director and field staff of the Assam Fisheries Development Corporation Limited, Guwahati as well as the lessee of Charan beel for providing help and assistance in carrying out the experiment. I (Pradyut Biswas) am thankful to the Director, ICAR-Central Institute of Fisheries Education (CIFE), Mumbai, India and the Director, ICAR-CIFRI, Barrackpore for allowing me to work in ICAR-CIFRI Regional Centre, Guwahati, Assam for my doctoral research.


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Copyright information

© Zoological Society, Kolkata, India 2016

Authors and Affiliations

  • Dipesh Debnath
    • 1
  • Sona Yengkokpam
    • 1
  • B. K. Bhattacharjya
    • 1
  • Pradyut Biswas
    • 3
    • 4
  • C. Prakash
    • 3
  • M. P. S. Kohli
    • 3
  • A. P. Sharma
    • 2
  1. 1.Central Inland Fisheries Research Institute (ICAR), Regional CentreHOUSEFED ComplexGuwahatiIndia
  2. 2.Central Inland Fisheries Research Institute (ICAR)Barrackpore, KolkataIndia
  3. 3.Aquaculture DivisionCentral Institute of Fisheries EducationMumbaiIndia
  4. 4.College of FisheriesCentral Agricultural UniversityLembucherra, AgartalaIndia

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