Document Type



Master of Science (MS)


Environmental Studies

First Advisor's Name

Krish Jayachandran

First Advisor's Committee Title

Co-Major Advisor

Second Advisor's Name

Mahadev Bhat

Second Advisor's Committee Title

Co-Major Advisor

Third Advisor's Name

Alok Deoraj

Third Advisor's Committee Title

Committee member


aquaponics, aquafeed, recirculating aquaculture, blue tilapia, red amaranth, crop yield, effluent

Date of Defense



Aquaponics, the integrated production of fish and hydroponic crops in a recirculating system, is an intensive cultivation method in which metabolic fish wastes fertilize plants. This study compares the effects of two aquafeeds on Red amaranth (Amaranthus tricolor) productivity and on water quality under cultivation of Blue tilapia (Oreochromis aureus), with three aquaponic units (n=3) per treatment over a 60-day trial. The fishmeal-based control feed contains higher crude protein (40%) and phosphorus (1.12%) than the plant-based alternative feed (32% and 0.40%). The alternative feed resulted in a significantly higher amaranth crop yield (p





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