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ABSTRACT: Gut microbiota of rainbow trout fed Hermetia illucens

PROVIDER: PRJNA703401 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13755526_1.fastq.gz	Fastqsanger.gz
	SRR13755526_2.fastq.gz	Fastqsanger.gz
	SRR13755527_1.fastq.gz	Fastqsanger.gz
	SRR13755527_2.fastq.gz	Fastqsanger.gz
	SRR13755528_1.fastq.gz	Fastqsanger.gz

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On the compatibility of fish meal replacements in aquafeeds for rainbow trout. A combined metabolomic, proteomic and histological study.

Project description:The sustainable development of modern aquaculture must rely on a significant reduction of the fish meal (FM) used in aquafeed formulations. However, FM substitution with alternative ingredients in diets for carnivorous fish species often showed reduced nutrient absorption, significantly perturbed metabolisms and histological changes at both hepatic and intestinal level. In the present study, adult rainbow trout (Oncorhynchus mykiss) were fed three different experimental aquafeed formulations. A control diet with higher FM content (27.3%) than two test formulations in which fish meal was substituted with two more sustainable and promising alternatives: insect meal (Hermetia illucens larvae=10.1%, FM=11.6%) and poultry by-products meal (PBM=14.8%; FM=11.7%). Combined metabolomics and proteomics analyses of fish liver, together with histological examination of liver and intestine demonstrated that a well balanced formulation of nutrients in the three diets allowed high metabolic compatibility of either substitutions, paving the way for innovative and sustainable use of novel raw materials for the fish feed industry. Results show that the main metabolic pathways of nutrient absorption and catabolism were essentially unaltered by alternative feed ingredients, and also histological alterations were negligible. It is demonstrated that substitution of fish meal with sustainable alternatives does not impact on fish metabolism, given proper efforts are put in fulfilling nutritional requirements of rainbow trout.

2022-07-18 | PXD033201 | Pride

Project description:Hermetia illucens microbiota

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

Project description:The Effects of Dietary Insect Meal from Hermetia illucens Prepupae on Gut Microbiota of Rainbow Trout (Oncorhynchus mykiss).

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Fish gut microbiome

Project description:Gut microbiota of rainbow trout fed with Yarrowia lipolytica

| PRJNA868917 | ENA

Project description:Hermetia illucens

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No adverse effect of a parental low protein/high carbohydrate diet on their offspring, in rainbow trout (liver)

Project description:In rainbow trout (Oncorhynchus mykiss), the effect of a paternal and a maternal "high carbohydrate/low protein" diet was assessed on progeny. To this purpose, two-year old males and females rainbow trout were fed either a control diet or a "high carbohydrate/low protein" diet for an entire reproductive cycle for females and for 5 months for males. Crossed-fertilizations were carried out in order to obtain 4 groups of offspring. Offspring were fed with a commercial diet until they reached a market size. At this stage, hepatic transcriptomes were compared to detect any impact of the parental diet on offspring metabolism.

2021-08-16 | GSE169001 | GEO

Regulation of Antimicrobial Peptides in Hermetia illucens in Response to Fungal Exposure

Project description:The black soldier fly (Hermetia illucens) is important in antimicrobial peptides (AMP) research due to its exposure to diverse microbial environments. However, the impact of different fungal exposures on AMP abundance in H. illucens has not been thoroughly explored. Our study focused on basal conditions and interactions with three fungi: the non-pathogenic Candida tropicalis (isolated from larval gut), Saccharomyces cerevisiae, and the pathogenic Beauveria bassiana. Using RNA-seq and LC-MS/MS, we found that under standard conditions, the majority of AMPs belonged to the Lysozyme, Cecropin, and Defensin classes, with Defensins exhibiting the highest quantification levels. Exposure to any of the fungi upregulated AMP gene expression, indicating immune activation. Notably, exposure to C. tropicalis and B. bassiana led to notable downregulation of AMPs in H. illucens larvae compared to S. cerevisiae, suggesting these fungi may suppress or modulate the host immune response to aid their survival and colonization. The immune response of H. illucens larvae revealed that S. cerevisiae and B. bassiana trigger similar AMP pathways, whereas C. tropicalis elicits a distinct response with upregulation of Defensins and Cecropins. Lysozymes, known for their antibacterial and antifungal activity, were upregulated in response to S. cerevisiae and B. bassiana, but downregulated with C. tropicalis, potentially facilitating fungal survival in the larvae’s gut. This suggests that C. tropicalis adapts to reduce immune pressure, while B. bassiana may suppress AMPs to persist. Understanding these mechanisms opens possibilities for leveraging AMPs in combating C. tropicalis, which is implicated in human diseases.

2024-11-19 | GSE272202 | GEO

Integrated mRNA and miRNA expression profile analyses reveal the potential roles of miRNA–mRNA pairs in skin color variation between wild-type and yellow mutant rainbow trout

Project description:As an important cold-water economic fish species, rainbow trout (Oncorhynchus mykiss) exhibits several intra-specific variation in skin pigmentation that can give rise to distinctive phenotypes, and wild-type rainbow trout with black skin (WR) and yellow mutant rainbow trout with yellow skin (YR) are the major two types in the farms, whose distinct skin colors make them suitable model for elucidating the skin pigmentation process. Skin color as a key indicator for selection in rainbow trout farming as well as has a strong visual impact on the consumer when rainbow trout are marketed. Previously, extensive studies have been conducted on skin color in rainbow trout, including the observation of skin spots and the expression analysis of some important pigment genes. However, up to date, no studies have systematically examined the molecular regulation mechanism of skin color difference between WR and YR through a high throughput method. Therefore, the aim of this study was to reveal the molecular regulation mechanism of skin color difference between these two strains at the mRNA and miRNA transcriptome level, and candidate genes, miRNAs and miRNA-mRNA pairs that may be responsible for rainbow trout albinism were obtained.

2022-04-21 | GSE172482 | GEO

Project description:Hermetia illucens Gut and Frass Metatranscriptome

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No adverse effect of a parental low protein/high carbohydrate diet on their offspring, in rainbow trout (muscle)

Project description:In rainbow trout (Oncorhynchus mykiss), the effect of a paternal and a maternal high carbohydrate-low protein diet was assessed on progeny at long term. To this purpose, two-year old male and female rainbow trout were fed either a control diet or a high carbohydrate/low protein diet for an entire reproductive cycle for females and for 5 months for males. Crossed-fertilizations were carried out in order to obtain 4 groups of offspring. Offspring were fed with a commercial diet until they reached a market size. At this stage, muscle transcriptomes were analysed to detect any effect of the parental diet on offspring metabolism.

2021-08-16 | GSE169002 | GEO

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