scholarly journals Effect of Feed Containing Hermetia illucens Larvae Immunized by Lactobacillus plantarum Injection on the Growth and Immunity of Rainbow Trout (Oncorhynchus mykiss)

Insects ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 801
Author(s):  
Dooseon Hwang ◽  
Chae-Hwan Lim ◽  
Seung-Hun Lee ◽  
Tae-Won Goo ◽  
Eun-Young Yun
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Pathogenic Bacteria ◽  
Blood Cell Count ◽  
Hermetia Illucens ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Red Blood Cell Count ◽  
Feed Source ◽  
Hermetia Illucens Larvae ◽  
Growth Indicator

We investigated the effects of a feed containing Hermetia illucens larvae injected with bacteria on the growth and immunity of Oncorhynchus mykiss. The feed was prepared by replacing fishmeal in feed with 25 and 50% nonimmunized (HIL25, HIL50) or immunized HIL (ImHIL25, ImHIL50), and its protein:fat:carbohydrate ratio was 45:15:18. ImHIL extracts showed inhibitory activity against fish pathogenic bacteria. Both red blood cell count and insulin-like growth factor-1 as the growth indicator were the highest among the groups at week 6 after feeding in the ImHIL50 group. As immune indicators, blood aspartate aminotransferase levels were lower in the ImHIL25 and ImHIL50 groups than in that of other groups at week 6 after feeding, and lysozyme content was significantly higher in ImHIL25 and ImHIL50. The above results demonstrate that ImHIL has a beneficial effect on the improvement of growth and immunity. Accordingly, we suggest that ImHIL has the potential to be a good feed source in aquaculture.

scholarly journals The Effects of Dietary Insect Meal from Hermetia illucens Prepupae on Autochthonous Gut Microbiota of Rainbow Trout (Oncorhynchus mykiss)

Animals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 143 ◽  
Author(s):  
Simona Rimoldi ◽  
Elisabetta Gini ◽  
Federica Iannini ◽  
Laura Gasco ◽  
Genciana Terova
Keyword(s):  
Rainbow Trout ◽  
Gut Microbiota ◽  
Oncorhynchus Mykiss ◽  
Intestinal Microbiota ◽  
Control Diet ◽  
Illumina Miseq ◽  
Rrna Gene ◽  
Hermetia Illucens ◽  
Operational Taxonomic Units ◽  
Rainbow Trout Oncorhynchus Mykiss

This study evaluated the effects of dietary insect meal from Hermetia illucens larvae on autochthonous gut microbiota of rainbow trout (Oncorhynchus mykiss). Three diets, with increasing levels of insect meal inclusion (10%, 20%, and 30%) and a control diet without insect meal were tested in a 12-week feeding trial. To analyze the resident intestinal microbial communities, the Illumina MiSeq platform for sequencing of 16S rRNA gene and QIIME pipeline were used. The number of reads taxonomically classified according to the Greengenes database was 1,514,155. Seventy-four Operational Taxonomic Units (OTUs) at 97% identity were identified. The core of adhered intestinal microbiota, i.e., OTUs present in at least 80% of mucosal samples and shared regardless of the diet, was constituted by three OTUs assigned to Propiobacterinae, Shewanella, and Mycoplasma genera, respectively. Fish fed the insect-based diets showed higher bacterial diversity with a reduction in Proteobacteria in comparison to fish fed the fishmeal diet. Insect-meal inclusion in the diet increased the gut abundance of Mycoplasma, which was attributed the ability to produce lactic and acetic acid as final products of its fermentation. We believe that the observed variations on the autochthonous intestinal microbiota composition of trout are principally due to the prebiotic properties of fermentable chitin.

Sensory Analysis of Rainbow Trout, Oncorhynchus mykiss, Fed Enriched Black Soldier Fly Prepupae, Hermetia illucens

2011 ◽  
Vol 42 (1) ◽  
pp. 34-45 ◽  
Author(s):  
Wendy M. Sealey ◽  
T. Gibson Gaylord ◽  
Frederic T. Barrows ◽  
Jeffery K. Tomberlin ◽  
Mark A. McGuire ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Sensory Analysis ◽  
Black Soldier Fly ◽  
Hermetia Illucens ◽  
Rainbow Trout Oncorhynchus Mykiss
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