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Recycling biofloc waste as novel protein source for crayfish with special reference to crayfish nutritional standards and growth trajectory
- Source :
- Scientific Reports, Vol 10, Iss 1, Pp 1-10 (2020), Scientific Reports
- Publication Year :
- 2020
- Publisher :
- Nature Publishing Group, 2020.
-
Abstract
- Screening of novel feedstuffs, that too for data-deficient (nutritionally) animals, is somewhat ambiguous or problematic. Through systematic meta-analyses, the present study formulated most up-to-date crayfish nutritional standards, against which a recyclable waste (biofloc biomass, BM) from intensive aquaculture systems was assessed as a novel protein source. Growth trajectory dependencies and thermal growth coefficient qualifying for good growth in crayfish (TGC 0.5–0.64 units) were benchmarked. Using these standards and a 7-week growth trial, BM's suitability as a novel protein source for red swamp crayfish Procambarus clarkii was evaluated through its graded inclusions in a commercial feed. Results suggest that BM can elevate growth at 33–66% inclusion in existing feed formulations. Beyond 66% inclusion, BM can deteriorate growth in crayfish due to high ash content (exceeding physiological limit > 14%), arginine deficiency (~ 14–20% lower than an optimum requirement), and insufficient non-protein energy: protein ratio (3.7 cal mg−1). Arginine is perhaps the most critical amino acid in dietary protein for crayfish, and deficient in BM. Although no critical bioaccumulation levels of heavy metals were breached by feeding 100% BM to crayfish, a mineral and heavy metal (Hg) stress seemed plausible. Crayfish raised solely on biofloc may not realize full growth potential.
- Subjects :
- 0301 basic medicine
Animal feed
Biomass
Hepatopancreas
lcsh:Medicine
Fresh Water
Aquaculture
Astacoidea
Biochemistry
Article
03 medical and health sciences
Stress, Physiological
Metals, Heavy
Animals
Recycling
Food science
lcsh:Science
Procambarus clarkii
Waste Products
Multidisciplinary
biology
Chemistry
Novel protein
business.industry
Biological techniques
lcsh:R
Proteins
Heavy metals
04 agricultural and veterinary sciences
Cichlids
biology.organism_classification
Crayfish
Animal Feed
030104 developmental biology
nervous system
Bioaccumulation
040102 fisheries
0401 agriculture, forestry, and fisheries
Animal Nutritional Physiological Phenomena
lcsh:Q
business
Zoology
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Volume :
- 10
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....6321be07ddcab9515ff48b06b2186ffa