Ontology highlight
ABSTRACT:
PROVIDER: PRJNA552228 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR9624141.fastq.gz | Fastqsanger.gz |
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Project description:In order to investigate the diurnal oscillations of ruminal bacteria, and their responses to the changes in different feeding patterns, we conducted an animal experiment by feeding the sheep ad libitum with a hay-based diet (50% of alfalfa hay and 46% of oats hay) and a grain-based diet (45% of corn meal and 11% of soybean meal) for 30 days, and ruminal fluid samples were collected at six different timepoints from T2 to T22 in one day, and the composition and diversity of the bacterial communities in rumen microbiomes of the sheep in the Grain-diet and Hay-diet groups at different timepoints were analyzed through 16S rRNA sequencing.
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Project description:Background: The possible impact of changes in diet composition for the intestinal microbiome is mostly studied after some days of adaptation to the diet of interest. The question arises if few days are enough to reflect the microbial response to the diet by changing the community composition and function. The present study investigated the fecal microbiome of pigs in a time span of four weeks after a dietary change to get an insight of the needed adaptation period. Four different diets were used differing in either protein source (field peas meal vs. soybean meal) or the concentration of calcium and phosphorus (CaP). Results: Twelve pigs were sampled at seven time points within four weeks after the dietary change. Fecal samples were used to sequence the 16S rDNA amplicons, to analyse the microbial proteins via LC-MS/MS and to determine the SCFA production. The analysis of OTU abundances and quantification values of proteins showed a significant separation of three periods of time (p=0.001). Samples from the first day are used to define the ‘Zero phase’, samples of weeks one and two are combined as ‘metabolic phase’ and an ‘equilibrium phase’ was defined based on samples from week three and four. Only in this last phase, a separation according to the supplementation of CaP was significantly detectable (p=0.001). No changes were found based on the corn-soybean meal or corn-field peas administration. The analysis of possible factors causing this significant separation showed only an overall change of bacterial members and functional properties. The metaproteomic approach yields a total of about 9700 proteins, which were used to deduce possible metabolic functions of the bacterialcommunity.
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Project description:The increasing aquaculture production volumes have caused an escalating demand for alternative protein feed ingredients. Agro-industrial by-products such as sunflower meal are relatively abundant and cheap, but the inclusion levels are limited due to the presence of antinutritional factors and fiber. Solid state fermentation is a processing method with the aim of reducing the content of fiber and antinutritional factors and improving nutritional value in plant protein raw materials. In this study, Atlantic salmon (Salmo salar) at two commercial-like fish farms were fed diets containing 5% non-fermented sunflower meal (as a control diet) and two experimental diets with 5% or 10% fermented sunflower meal. The field trial lasted for eight and 11 months in a coastal and fjord location, respectively with the aim of comparing the effect of fermented diets on growth performance, gut microbiota, distal intestine histology and gene expression of Atlantic salmon under different environmental conditions. The findings revealed that diets with fermented sunflower meal sustained growth performance, improved intestinal health by reducing the prevalence of prominent inflammation and ectopic goblet cells and promoted gut lactic acid bacteria Lactiplantibacillus and Lactobaccilaceae after long-term feeding. Our results suggest that fermented sunflower meal is suitable as a protein source for Atlantic salmon when included at a level of up to 10% in the diet.
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