Document Detail

Duckweed (Lemna polyrhiza) leaf meal as a source of feedstuff in formulated diets for rohu (Labeo rohita Ham.) fingerlings after fermentation with a fish intestinal bacterium.
MedLine Citation:
PMID:  12146637     Owner:  NLM     Status:  MEDLINE    
Eight isonitrogenous (35% crude protein approximately) and isocaloric (4.2 kcal g(-1) approximately) diets were formulated including raw and fermented duckweed (Lemna polyrhiza) leaf meal at 10%, 20%, 30% and 40% levels. A particular bacterial strain (Bacillus sp.) isolated from carp (Cyprinus carpio) intestine and having extracellular amylolytic, cellulolytic, proteolytic and lipolytic activities was used for leaf meal fermentation for 15 days at 37 degrees C. The fibre content of leaf meal reduced from 11.0% to 7.5% and the antinutritional factors, tannin and phytic acid, were reduced from 1.0% to 0.02% and 1.23% to 0.09%, respectively after fermentation. However, the available reducing sugars, free amino acids and fatty acids increased in the fermented leaf meal. The response of rohu, Labeo rohita, fingerlings fed the experimental diets for 80 days was compared with fish fed a fish meal based reference diet. On the basis of growth response, food conversion ratio and protein efficiency ratio, 30% fermented Lemna leaf meal incorporated in the diet resulted in the best performance of rohu fingerlings. In general, growth and feed utilization efficiencies of fish fed fermented leaf meal containing diets were superior to those fed diets containing raw leaf meal. The apparent protein digestibility (APD) decreased with increasing levels of leaf meal irrespective of treatment. The APD for raw leaf meal was lower at all levels of inclusion in comparison to those for the fermented meals. The highest carcass protein and lipid deposition was recorded in fish fed the diet containing 30% fermented leaf meal. The results showed that fermented Lemna leaf meal can be incorporated into carp diets up to 30% level compared to 10% level of raw meal.
A Bairagi; K Sarkar Ghosh; S K Sen; A K Ray
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Bioresource technology     Volume:  85     ISSN:  0960-8524     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2002 Oct 
Date Detail:
Created Date:  2002-07-30     Completed Date:  2003-01-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  17-24     Citation Subset:  IM    
Department of Zoology, Visva-Bharati University, West Bengal, India.
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MeSH Terms
Animal Feed*
Bacillus / enzymology*,  isolation & purification
Body Weight
Carps / growth & development*,  physiology
Digestion / drug effects
Intestines / microbiology*
Lipids / analysis
Plant Leaves / metabolism*
Proteins / analysis
Reference Values
Time Factors
Reg. No./Substance:
0/Lipids; 0/Proteins

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