Effect of dietary protein levels on the growth of Carnatic carp Barbodes carnaticus (Jerdon, 1849) fingerlings


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Authors

  • N. Sridhar Regional Research Centre of ICAR-Central Institute of Freshwater Aquaculture, Hesaraghatta Lake P.O., Bangalore - 560 089, Karnataka, India
  • B. Gangadhar Regional Research Centre of ICAR-Central Institute of Freshwater Aquaculture, Hesaraghatta Lake P.O., Bangalore - 560 089, Karnataka, India
  • Uma Latha Regional Research Centre of ICAR-Central Institute of Freshwater Aquaculture, Hesaraghatta Lake P.O., Bangalore - 560 089, Karnataka, India
  • C.H. Raghavendra Regional Research Centre of ICAR-Central Institute of Freshwater Aquaculture, Hesaraghatta Lake P.O., Bangalore - 560 089, Karnataka, India
  • S. S. Giri ICAR-Central Institute of Freshwater Aquaculture , Kausalyaganga, Bhubaneswar - 751 002, Odisha, India
  • P. Jayasankar ICAR-Central Institute of Freshwater Aquaculture , Kausalyaganga, Bhubaneswar - 751 002, Odisha, India

https://doi.org/10.21077/ijf.2017.64.special-issue.76270-29

Abstract

Fingerlings of Barbodes carnaticus (Jerdon 1849) (6.40±0.267 cm, 2.46±0.39 g) were reared in aerated plastic tubs (40 l) with five iso-energetic diets formulated to contain crude protein levels ranging from 25 to 45% using pure ingredients. Initially, the diet was fed at @5% of the biomass and gradually adjusted based on daily feed consumption. The fish were allowed to feed for 6 h and thereafter the unconsumed feeds were siphoned out. The following day, faecal matter was collected from each tank by filtering the water with a fine meshed nylon cloth (15 μm), dried, pooled and stored for proximate analysis. Water from each
tub was replaced with 50% freshwater every day after faecal matter collection. The feeding trial was conducted for a period of 60 days. Proximate composition of feed and faecal matter was analysed. Acid insoluble ash was used as the reference marker for dry matter, protein and fat digestibility determination. The growth parameters and protein efficiency ratio (PER) were higher (p<0.05) in fish fed 35% protein diet compared to other diets. The feed conversion ratio (FCR) was lower (p<0.05) in 35, 40 and 45% protein diets compared to the lower protein diets. The carcass proximate composition revealed the lowest moisture (p<0.05) and highest protein (p>0.05) and fat content (p<0.05) in fish fed 35% protein diet compared to other diets. The digestibility of
dry matter and nutrients was higher (p<0.05) with 35% protein diet. The study revealed crude protein requirement of 35% by the fingerlings of B. carnaticus.

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Submitted

2017-12-04

Published

2018-03-14

How to Cite

Sridhar, N., Gangadhar, B., Latha, U., Raghavendra, C., Giri, S. S., & Jayasankar, P. (2018). Effect of dietary protein levels on the growth of Carnatic carp Barbodes carnaticus (Jerdon, 1849) fingerlings. Indian Journal of Fisheries, 64. https://doi.org/10.21077/ijf.2017.64.special-issue.76270-29