TY - JOUR
T1 - Gas to protein
T2 - Microbial single cell protein is an alternative to fishmeal in aquaculture
AU - Woolley, Lindsey
AU - Chaklader, Md Reaz
AU - Pilmer, Luke
AU - Stephens, Frances
AU - Wingate, Catherine
AU - Salini, Michael
AU - Partridge, Gavin
N1 - Funding Information:
This study was funded by the Government of Western Australia Department of Primary Industries and Regional Development .
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/2/10
Y1 - 2023/2/10
N2 - Methanotrophic bacteria represent an appealing opportunity to convert methane, a potent greenhouse gas, into a highly nutritious animal feed ingredient, single-cell protein (SCP). SCP has a comparable or superior nutritional profile that to most conventional protein sources and can be produced within a lower environmental footprint. The present study investigated the effect of replacing fishmeal (FM) with methanotrophic SCP in diets for barramundi (Lates calcarifer), a carnivorous fish with a high demand for dietary protein and energy. Dietary inclusion levels of 0 %, 10 %, 20 % and 30 % SCP (representing 0, 25, 50 and 75 % FM replacement) were tested, with and without additives. Triplicate groups of juvenile barramundi were fed the diets over 31 days. The inclusion of SCP significantly improved weight gain and feed conversion efficiency (FCE). Dietary SCP inclusion supported good gut health, with decreasing trends of hepatosomatic index, improved plasma biochemistry, and no adverse histopathological changes. Barramundi fed the SCP diets showed an intact intestinal barrier and a significant improvement in villi and lamina propria area when fed the additive supplemented SCP diets. This study demonstrates that this SCP is highly palatable to barramundi (even without dietary additives) and can replace up to 75 % FM with significant improvements in growth and FCE.
AB - Methanotrophic bacteria represent an appealing opportunity to convert methane, a potent greenhouse gas, into a highly nutritious animal feed ingredient, single-cell protein (SCP). SCP has a comparable or superior nutritional profile that to most conventional protein sources and can be produced within a lower environmental footprint. The present study investigated the effect of replacing fishmeal (FM) with methanotrophic SCP in diets for barramundi (Lates calcarifer), a carnivorous fish with a high demand for dietary protein and energy. Dietary inclusion levels of 0 %, 10 %, 20 % and 30 % SCP (representing 0, 25, 50 and 75 % FM replacement) were tested, with and without additives. Triplicate groups of juvenile barramundi were fed the diets over 31 days. The inclusion of SCP significantly improved weight gain and feed conversion efficiency (FCE). Dietary SCP inclusion supported good gut health, with decreasing trends of hepatosomatic index, improved plasma biochemistry, and no adverse histopathological changes. Barramundi fed the SCP diets showed an intact intestinal barrier and a significant improvement in villi and lamina propria area when fed the additive supplemented SCP diets. This study demonstrates that this SCP is highly palatable to barramundi (even without dietary additives) and can replace up to 75 % FM with significant improvements in growth and FCE.
KW - Barramundi
KW - Carbon capture
KW - Feed conversion efficiency
KW - Growth
KW - Single cell protein
UR - http://www.scopus.com/inward/record.url?scp=85142267807&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2022.160141
DO - 10.1016/j.scitotenv.2022.160141
M3 - Article
C2 - 36395832
AN - SCOPUS:85142267807
VL - 859
JO - Science of the Total Environment
JF - Science of the Total Environment
SN - 0048-9697
M1 - 160141
ER -