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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Sep 2018, 39 (5)                                                                                                             Back

nstantaneous and historical temperature effects on a-pinene

Effects of dietary crude fiber level on growth performance, body composition, liver glycogen and intestinal short chain fatty acids of a tropical carp (Barbonymus gonionotus X Hypsibarbus wetmorei male )


Mohd. S. Kamarudin, Muhammad A. Sulaiman* and Mohd. F.S. Ismail

Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia

*Corresponding Author E-mail:




Key words

Body composition

Dietary fiber

Growth performance

Intestinal short chain fatty acids

Lemon fin barb hybrid




Publication Data

Paper received : 05.07.2017

Revised received : 20.09.2017

Re-revised received : 02.11.2017

Accepted : 28.12.2017



Aim: A 60-day feeding trial was conducted to determine the maximum dietary crude fiber level a tropical carp, lemon fin barb hybrid, could tolerate in their diet.


Methodology: Twenty fish (1.50 0.05 g) were randomly stocked per 100 l aquarium tank in 3 replicates and fed twice a day with 5 isonitrogenous (30% protein), isocaloric (17 kJ g-1), 35% carbohydrate and isolipidic (4%) test diets containing 0, 5, 10, 15 and 20% crude fiber until apparent satiation.


Results: The survival (100%) was unaffected by the dietary fiber level although weight gain, specific growth rate, and protein efficiency ratio significantly decreased (p<0.05) as dietary fiber level increased. The best feed conversion ratio (1.52) was achieved at 5% fiber level, while the protein retention increased upto 5% fiber level and decreased beyond this level. Whole body lipid significantly decreased (p< 0.05) with increasing dietary fiber level, whereas the body carbohydrate showed an opposite trend. No significant difference was found to the intestinal butyric acid, although acetic acid and propionic acid were higher in fish fed 0-10% crude fiber.


Interpretation: Using a second order polynomial regression analysis, the recommended dietary fiber level for the hybrid was estimated at 5.2 % based on specific growth rate, which corresponded to a gross energy requirement of 17 kJ g-1. It was concluded that the hybrid fingerlings could tolerate and utilise up to 10% dietary fiber at a total carbohydrate level of 35%.




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