TITLE:
Potentiality of Bioconverted Leafy Vegetable Waste as Aquaculture Feed Supplement
AUTHORS:
Sujjat Al Azad, Mohammad Tamrin Bin Mohamad Lal
KEYWORDS:
Afifella marine, Vegetable Waste Powder, Bioconversion and Aquaculture Feed
JOURNAL NAME:
Advances in Bioscience and Biotechnology,
Vol.9 No.11,
November
22,
2018
ABSTRACT: Purple non-sulfur bacteria (PNSB) are well known for
their ability in transforming organic substrates for their own source of
nutrients. The nutritional values of leafy vegetable waste could be improved
through bioconversion with PNSB. This study was conducted to access nutritional
status of leafy vegetable waste bio-converted product and efficacy of derived
product as aquaculture feed supplement. Proximate compositions of bio-converted
leafy vegetable wastes were improved after 6 days with 30% inoculums of Afifella marina strain ME (KC205142).
The crude proteins (%) and ashes (%) in derived product was increased to 51.7%
and 19.6% respectively. On the other hand, the fiber (%) in the bio-converted
derived product was decreased by 21%. During feeding trial in Tilapia (Oreochromis
niloticus), no significant
differences were observed in the feed intake (g/fish/day), but significant
differences were observed in the value of feed conversion ratio and weight gain
(%) among the used diets. However, lower ingestion rate (g/d/fish) and better
feed conversion ratio were obtained while fishes were fed with diet composed of
commercial feed mixed with 5% of the bio-converted product. The higher
ingestion rate (g/d/fish) and lower feed conversion ratio were observed with
only commercial diet. There observed no significant differences in the
ingestion rate (g/d/fish) and FCR values among the diet composed of commercial
feed with 5% (D5) and 10% (D10) of the bio-converted product. The derived
bio-converted product can be a promising approach to open new market segment in
aquafeed industry.