Insect meal inclusion as a novel feed ingredient in soy-based diets improves performance of rainbow trout (Oncorhynchus mykiss)

被引:17
|
作者
Hossain, Md. Sakhawat [1 ,4 ]
Fawole, Femi J. [2 ,3 ]
Labh, Shyam Narayan [2 ]
Small, Brian C. [1 ]
Overturf, Ken [5 ]
Kumar, Vikas [1 ,2 ]
机构
[1] Univ Idaho, Inst Aquaculture Res, Hagerman Fish Culture Expt Stn, Hagerman, ID USA
[2] Univ Idaho, Inst Aquaculture Res, Dept Anim Vet & Food Sci, Moscow, ID 83843 USA
[3] Univ Ilorin, Dept Fisheries & Aquaculture, Ilorin, Nigeria
[4] Sylhet Agr Univ, Dept Aquaculture, Fac Fisheries, Sylhet 3100, Bangladesh
[5] ARS, USDA, Hagerman Fish Culture Expt Stn, Hagerman, ID USA
基金
美国农业部;
关键词
Insect meal; Soy based diet; Polyunsaturated fatty acids; Low fishmeal; Rainbow trout; FLY HERMETIA-ILLUCENS; SALMON SALMO-SALAR; JUVENILE JAPANESE FLOUNDER; HEPATIC LIPID-METABOLISM; FATTY-ACID-COMPOSITION; TENEBRIO-MOLITOR MEAL; FISH-OIL REPLACEMENT; PRE-PUPAE MEAL; ATLANTIC SALMON; GROWTH-PERFORMANCE;
D O I
10.1016/j.aquaculture.2021.737096
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
The additive effects of insect meal supplementation to diets containing a high soy protein inclusion were evaluated for growth performance, antioxidant potential and fillet nutritional quality of juvenile rainbow trout (Oncorhynchus mykiss). A basal diet (Soy) with a high-level soy protein (21% soybean meal, SBM plus 4-5.5% soy protein concentrate, SPC) was compared to similarly formulated soy-based diets supplemented with low (8%) and high levels (16%) of insect meal for diet groups Soy + IMLow and Soy + IMHigh, respectively. A high-level fishmeal (24%) based positive control diet (Fish meal) was also produced. All diets were iso-nitrogenous (44%) and isolipidic (20%) and were fed to triplicate groups of rainbow trout juveniles (initial weight 32 +/- 0.0 g) over the course of a 10-week trial. Fish fed the positive control diet showed significantly higher final weight, % weight gain (%WG) and specific growth rate (SGR) compared to the Soy + IMHigh and Soy diet groups, but these parameters were not significantly different from the Soy + IMLow diet group. The Soy and Soy + IMHigh diet groups showed significantly lower final weight, % WG and SGR. Feed efficiency and protein efficiency ratio was numerically higher in fish fed the Fish meal positive control diet followed by the Soy + IMLow and Soy and Soy + IMHigh diet groups, respectively. Among somatic indices, condition factor (CF) was significantly influenced by IM supplementation and the Soy + IMHigh diet group showed significantly lower CF compared to other dietary groups. Addition of insect meal significantly increased whole body amino acids viz., arginine, histidine, valine and threonine content. Insect meal supplementation significantly increased muscle mlinolenic acid content. However, mlinolenic acid content in fish fed the Soy + IMHigh diet was not significantly different from fish fed the Fishmeal positive control diet. Insect meal supplementation did not significantly influence EPA + DHA, total n-3 PUFA and monounsaturated fatty acid content in the muscle, whereas the significantly highest EPA/DHA and total monounsaturated fatty acids were detected in the fishmeal based positive control diet compared to other dietary treatment. The liver gene expression pattern for Delta 5 desaturase was significantly higher in the Soy + IMLow diet fish, while Delta 6 desaturase and fatty acid synthase (FAS) were significantly higher in Soy (basal) and Soy + IMLow diet fed fish. Elongase and fatty acid binding protein (FABP) were not significantly influenced by insect meal supplementation. Regarding the antioxidant potential, Soy diet group showed significantly higher superoxide dismutase (SOD) activity compared to insect meal included groups and positive control diet group. Glutathione peroxidase (GPX) activity was significantly reduced in Soy + IMHigh diet compared to other dietary groups. Finally, we conclude that insect meal inclusion at a low level (8%) is beneficial for increased growth and select fatty acid restoration for rainbow trout fed soy-based feeds.
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页数:11
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