Insect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (Oncorhynchus mykiss)

Alternative sources of fish oil (FO) are one of the major problems in aquaculture; therefore, the goal of the present study was to examine insect (black soldier fly larvae) oil (BSLO) as a potential replacer of fish/soy oil in juvenile rainbow trout (initial average weight of 32 ± 0.15 g) feed. Four...

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Autores principales:	Femi J. Fawole, Shyam N. Labh, Md Sakhawat Hossain, Ken Overturf, Brian C. Small, Thomas L. Welker, Ronald W. Hardy, Vikas Kumar
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2021
Materias:	Insect oil Rainbow trout Growth performance Fatty acid metabolism Antioxidant enzyme Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/eaefd813725b4001a66f5d90eee4a443
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spelling	oai:doaj.org-article:eaefd813725b4001a66f5d90eee4a4432021-11-06T04:33:00ZInsect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (Oncorhynchus mykiss)2405-654510.1016/j.aninu.2021.07.008https://doaj.org/article/eaefd813725b4001a66f5d90eee4a4432021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2405654521001803https://doaj.org/toc/2405-6545Alternative sources of fish oil (FO) are one of the major problems in aquaculture; therefore, the goal of the present study was to examine insect (black soldier fly larvae) oil (BSLO) as a potential replacer of fish/soy oil in juvenile rainbow trout (initial average weight of 32 ± 0.15 g) feed. Four diets were formulated wherein FO (control diet) was completely replaced with either soybean oil (SO) or BSLO, and an additional BSLO-based diet supplemented with 1.5% bile acid (BSLO + BA) were fed to the fish for 10 weeks. Growth performance of the BSLO fed group was similar (P > 0.05) to that of the FO and SO fed groups, however, the fish fed BSLO + BA diet registered the lowest growth (P < 0.05). Oil sources did not (P > 0.05) affect the major nutrient content of whole-body, however, the fatty acid composition of the muscle and liver was influenced (P < 0.05), with the highest 14:0, 16:0, and total saturated fatty acid detected in BSLO or BSLO + BA fed trout compared to the others (P < 0.001). No significant differences were observed in eicosapentaenoic acid + docosahexaenoic acid (EPA + DHA) or total n-3 polyunsaturated fatty acid (PUFA) content in muscle among the groups, whereas, the highest EPA:DHA and n-3:n-6 ratios were detected in the FO group. Gene expression for fatty acid binding protein (fabp), fatty acid synthase (fas), and Δ5 desaturase in the liver was lower in FO (P < 0.05), while BSLO + BA registered the highest Δ6 expression (P = 0.006). Supplementation of BA in the BSLO diet increased superoxide dismutase (SOD) and catalase (CAT) activities compared to the other groups (P < 0.05). In conclusion, BSLO could serve as a substitute for FO and SO in rainbow trout diet without negatively impacting growth performance, whole-body composition and nutrient retention, and modulate the expression of fatty acid metabolism-related genes in rainbow trout.Femi J. FawoleShyam N. LabhMd Sakhawat HossainKen OverturfBrian C. SmallThomas L. WelkerRonald W. HardyVikas KumarKeAi Communications Co., Ltd.articleInsect oilRainbow troutGrowth performanceFatty acid metabolismAntioxidant enzymeAnimal cultureSF1-1100ENAnimal Nutrition, Vol 7, Iss 4, Pp 1360-1370 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Insect oil Rainbow trout Growth performance Fatty acid metabolism Antioxidant enzyme Animal culture SF1-1100
spellingShingle	Insect oil Rainbow trout Growth performance Fatty acid metabolism Antioxidant enzyme Animal culture SF1-1100 Femi J. Fawole Shyam N. Labh Md Sakhawat Hossain Ken Overturf Brian C. Small Thomas L. Welker Ronald W. Hardy Vikas Kumar Insect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (Oncorhynchus mykiss)
description	Alternative sources of fish oil (FO) are one of the major problems in aquaculture; therefore, the goal of the present study was to examine insect (black soldier fly larvae) oil (BSLO) as a potential replacer of fish/soy oil in juvenile rainbow trout (initial average weight of 32 ± 0.15 g) feed. Four diets were formulated wherein FO (control diet) was completely replaced with either soybean oil (SO) or BSLO, and an additional BSLO-based diet supplemented with 1.5% bile acid (BSLO + BA) were fed to the fish for 10 weeks. Growth performance of the BSLO fed group was similar (P > 0.05) to that of the FO and SO fed groups, however, the fish fed BSLO + BA diet registered the lowest growth (P < 0.05). Oil sources did not (P > 0.05) affect the major nutrient content of whole-body, however, the fatty acid composition of the muscle and liver was influenced (P < 0.05), with the highest 14:0, 16:0, and total saturated fatty acid detected in BSLO or BSLO + BA fed trout compared to the others (P < 0.001). No significant differences were observed in eicosapentaenoic acid + docosahexaenoic acid (EPA + DHA) or total n-3 polyunsaturated fatty acid (PUFA) content in muscle among the groups, whereas, the highest EPA:DHA and n-3:n-6 ratios were detected in the FO group. Gene expression for fatty acid binding protein (fabp), fatty acid synthase (fas), and Δ5 desaturase in the liver was lower in FO (P < 0.05), while BSLO + BA registered the highest Δ6 expression (P = 0.006). Supplementation of BA in the BSLO diet increased superoxide dismutase (SOD) and catalase (CAT) activities compared to the other groups (P < 0.05). In conclusion, BSLO could serve as a substitute for FO and SO in rainbow trout diet without negatively impacting growth performance, whole-body composition and nutrient retention, and modulate the expression of fatty acid metabolism-related genes in rainbow trout.
format	article
author	Femi J. Fawole Shyam N. Labh Md Sakhawat Hossain Ken Overturf Brian C. Small Thomas L. Welker Ronald W. Hardy Vikas Kumar
author_facet	Femi J. Fawole Shyam N. Labh Md Sakhawat Hossain Ken Overturf Brian C. Small Thomas L. Welker Ronald W. Hardy Vikas Kumar
author_sort	Femi J. Fawole
title	Insect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (Oncorhynchus mykiss)
title_short	Insect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (Oncorhynchus mykiss)
title_full	Insect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (Oncorhynchus mykiss)
title_fullStr	Insect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (Oncorhynchus mykiss)
title_full_unstemmed	Insect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (Oncorhynchus mykiss)
title_sort	insect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (oncorhynchus mykiss)
publisher	KeAi Communications Co., Ltd.
publishDate	2021
url	https://doaj.org/article/eaefd813725b4001a66f5d90eee4a443
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Insect (black soldier fly larvae) oil as a potential substitute for fish or soy oil in the fish meal-based diet of juvenile rainbow trout (Oncorhynchus mykiss)

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