This study assessed the suitability of biofloc biomass (BM) as a protein source for red swamp crayfish (*Procambarus clarkii*). Crayfish nutritional standards were established via meta-analysis, against which BM was evaluated in a 7-week growth trial using graded BM inclusions (0%, 33%, 66%, 100%) in commercial feed. Results indicate that BM inclusion at 33–66% enhanced growth; however, higher inclusions (≥66%) negatively impacted growth due to high ash content, arginine deficiency, and insufficient non-protein energy:protein ratio. While no critical heavy metal bioaccumulation occurred, potential mineral and mercury stress were observed with 100% BM feeding.
Publisher
Scientific Reports
Published On
Nov 11, 2020
Authors
Roman Lunda, Koushik Roy, Petr Dvorak, Antonin Kouba, Jan Mraz
Tags
biofloc biomass
red swamp crayfish
protein source
growth trial
nutritional standards
heavy metal bioaccumulation
arginine deficiency
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