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ABSTRACT: Seaweed as functional ingredients for farmed fish

PROVIDER: PRJNA695386 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13569400_1.fastq.gz	Fastqsanger.gz
	SRR13569400_2.fastq.gz	Fastqsanger.gz
	SRR13569401_1.fastq.gz	Fastqsanger.gz
	SRR13569401_2.fastq.gz	Fastqsanger.gz
	SRR13569402_1.fastq.gz	Fastqsanger.gz

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Project description:Seaweed as functional ingredients for farmed fish

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Enniatin B and beauvericin prevailing in fish feed affect intestinal cell function and hematological processes in Atlantic salmon (Salmo salar) after acute exposure

Project description:Unintentional use of mold-infested plant-based feed ingredients are sources of mycotoxins in fish feeds. The presence of the emerging mycotoxins ENNB and BEA in Norwegian commercial fish feeds and plant-based feed ingredients has raised concerns regarding the health effects on farmed Atlantic salmon (Salmon salar). Atlantic salmon pre-smolts were exposed to a non-lethal single-dose of BEA and ENNB, and total RNA sequencing of the intestine and liver was carried out to evaluate gut health and identify possible hepatological changes after a single-dose dietary exposure. ENNB and BEA did not give acute toxicity, however ENNB caused the onset of pathways linked to acute intestinal inflammation and BEA exposures caused the onset of hepatic hematological disruption. The prevalence and concentration of ENNB found in today's commercial feed could affect the fish health if consumed over a longer time-period.

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Effects of functional ingredients on gut inflammation in Atlantic salmon (Salmo salar L)

Project description:Intestinal inflammation, which is often observed in farmed salmon, is caused by anti nutrient in feed ingredients of plant origin. The aim of this study is to increase knowledge of this patholology and to assess effects of physiologically active compounds applied as feed additives.Feeding trial was followed with metabolomic, transcriptomic and bacterial meta genomic analyses.

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Whole-transcriptome RNA sequencing of skin reveals innate immunity differences between wild-type and yellow mutant rainbow trout

Project description:Rainbow trout (Oncorhynchus mykiss) is an important aquaculture fish species that is farmed worldwide, and it is also the most widely cultivated cold water fish in China. This species, a member of the salmonidae family, is an ideal model organism for studying the immune system in fish. Two phenotypes of rainbow trout are widely cultured; wild-type rainbow trout with black skin (WR_S) and yellow mutant rainbow trout with yellow skin (YR_S). Fish skin is an important immune organ, however, little is known about the differences in skin immunity between WR_S and YR_S in a natural flowing water pond aquaculture environment, and very few studies were conducted to investigate the ceRNA mechanism for fish skin.

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Distinct early-life stage gene expression effects of hybridization among European and North American farmed and wild Atlantic salmon populations

Project description:Due to multi-generation domestication selection, farmed and wild Atlantic salmon diverge genetically, which raises concerns about potential genetic interactions among escaped farmed and wild populations and disrupts local adaptation through introgression. When farmed strains of distant geographic origin are used, it is unknown whether the genetic risks posed by escaped farmed fish will be greater than if more locally derived strains are used. Quantifying gene expression differences among divergent farmed, wild and F1 hybrids under controlled conditions is one of the ways to explore the consequences of hybridization. We compared the transcriptomes of late sac fry of a European (EO) farmed (“StofnFiskur”, Norwegian strain), a North American (NA) farmed (Saint John River, NB strain), a Newfoundland (NF) wild population with EO ancestry, and related F1 hybrids using 44K microarrays. Our findings indicate that the wild population showed greater transcriptome differences from the EO farmed strain than that of the NA farmed strain. We also found the largest differences in global gene expression between the two farmed strains. We detected fewer differentially expressed transcripts between F1 hybrids and domesticated/wild maternal strains. We also found that the differentially expressed genes between cross types over-represented GO terms associated with metabolism, development, growth, immune response, and redox homeostasis processes. These findings suggest that the interbreeding of escaped EO/NA farmed and NF wild population would alter gene transcription, and the consequences of hybridization would be greater from escaped EO farmed than NA farmed salmon, resulting in potential effects on the fitness of wild populations.

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Project description:Understanding the molecular mechanisms of feed efficiency is an important step toward sustainability of salmonids aquaculture. In this study, the liver and white muscle proteomes of efficient (EFF) and inefficient (INEFF) Chinook salmon (Oncorhynchus tshawytscha) farmed in sea water were investigated by liquid chromatography-tandem mass spectrometry (LC-MS/MS) approach. In total, 2,746 liver and 702 white muscle quantified proteins were compared between 21 EFF and 22 INEFF fish. Protein synthesis was enriched in both liver and white muscle of the EFF group while conversely, pathways related to protein degradation (amino acid catabolism and proteolysis, respectively) were the most affected processes in the liver and white muscle of INEFF fish. The SOM in the INEFF group was significantly higher than EFF fish showing INEFF fish probably was the dominant group. The INEFF group (dominant) suffered stress and shifted to consume energy through protein catabolism. As the first study, the results provide a preliminary picture of the fundamental molecular landscape of feed efficiency in Chinook salmon farmed in sea water

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RNA-seq of stomach and pyloric caeca from Atlantic salmon (Salmo salar) fed diets containing chitin from shrimp and black soldier fly larvae

Project description:Farmed Atlantic salmon was given either a 6 % cellulose diet, a diet containing 6 % shrimp shell chitin or a diet containing 6 % chitin from black soldier fly larvae for a period of 4 weeks. The fish were split into six tanks at the beginning of the experiment; six fish per tank and two tanks per diet. RNA from stomach and pyloric caeca from four fish given each diet was sequenced.

2021-08-15 | E-MTAB-10594 | biostudies-arrayexpress

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.

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An oil containing EPA and DHA from transgenic Camelina sativa to replace marine fish oil in feeds for Atlantic salmon (Salmo salar L.)

Project description:New de novo sources of omega 3 (n-3) long chain polyunsaturated fatty acids (LC-PUFA) are required as alternatives to fish oil in aquafeeds in order to maintain adequate levels of the beneficial fatty acids, eicosapentaenoic and docosahexaenoic (EPA and DHA, respectively). The present study investigated the use of an EPA+DHA oil derived from a transgenic Camelina sativa in feeds for Atlantic salmon (Salmo salar) containing low levels of fishmeal (35 %) and fish oil (10 %), reflecting current commercial formulations, to determine the impacts on intestinal transcriptome, tissue fatty acid profile and health of farmed salmon. Post-smolt Atlantic salmon were fed for 12-weeks with one of three experimental diets containing either a blend of fish oil/rapeseed oil (FO), wild-type camelina oil (WCO) or transgenic camelina oil (DCO) as added lipid source. The DCO diet did not affect any of the fish performance or health parameters studied. Analyses of the mid and hindgut transcriptomes showed only mild effects on metabolism. Flesh of fish fed the DCO diet accumulated almost double the amount of n-3 LC-PUFA than fish fed the FO or WCO diets, indicating that these oils from transgenic oilseeds offer the opportunity to increase the n-3 LC-PUFA in farmed fish to levels comparable to those found twelve years ago.

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