Bioprocessed poultry by-product meals on growth, gut health and fatty acid synthesis of juvenile barramundi, Lates calcarifer (Bloch)

• DOI: 10.1371/journal.pone.0215025
• Publication Date: 2019-04-09T18:15:42Z
• Authors: Muhammad A. B. Si...; Patience Chungu; Ravi Fotedar; Janet Howieson
• Keywords: Barramundi

Poultry by-product meal (PBM) has been utilised as a substitute of fishmeal (FM) in many aquaculture species. However, little information is known regarding the use bioprocessed PBM (BPBM) production. This study was undertaken to investigate whether replacing FM with BPBM improved growth performance, gut morphology and fatty acid synthesis juvenile barramundi, Lates calcarifer. The by baker yeast, Saccharomyces cerevisae Lactobacillus casei. used replace at 75% 100% (75BPBM 100BPBM) contrasting against unprocessed (75PBM 100PBM) same levels based diets control. Juvenile barramundi mean initial weight 3.78±0.16 g were stocked density 20 fish per tank. After 42 days study, final weight, specific rate feed conversion ratios fed 75PBM 75BPBM not significantly different from supplementation 100PBM 100BPBM resulted reduced performance all variables except total intake survival. hind microvillus higher (P<0.05) 75BPBM, whereas diameter remained unaffected other experimental when compared A reduction eicosapentaenoic (EPA) docosahexaenoic (DHA) acids muscles led lower Σn-3/Σn-6 ratio dietary groups percentage Σn-3 PUFAs decreased replacement 100BPBM, while Σn-6 increased both protein diets. Fish had hypocholesterolemic/hypercholesterolemic (HH), indicating suitability for human consumption.