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Water and fish microbiota in gnotobiotic rearing system for cod larvae

ABSTRACT: Commensal and opportunistic bacteria present in the microbiota in Atlantic cod (Gadus morhua) larvae differentially alter the hosts’ innate immune responses

PROVIDER: PRJEB49218 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR7531040_1.fastq.gz	Fastqsanger.gz
	ERR7531040_2.fastq.gz	Fastqsanger.gz
	ERR7531050_1.fastq.gz	Fastqsanger.gz
	ERR7531050_2.fastq.gz	Fastqsanger.gz
	ERR7531041_1.fastq.gz	Fastqsanger.gz

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Project description:The Atlantic cod (Gadus morhua L.) is one of the most important species in the Baltic Sea with high ecological and economical value. To explore the differences in adaptation to salinity between Baltic cod from different regions, western (Kiel Bight) and eastern (Gdańsk Bay) samples were analyzed through oligonucleotide microarray.

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Project description:Aquaculture is one of the fastest growing food production sectors in the world and further expansion is expected throughout the 21st century. However, climate change is threatening the development of the sector and action is needed to prepare the industry for the coming challenges. Using downscaled temperature projections based on the Intergovernmental Panel on Climate Change (IPCC) climate projection (Shared Socioeconomic Pathway, SSP2-4.5), we analysed potential future temperatures at a selected Atlantic cod (Gadus morhua L.) farm site in Northern Norway. Results showed that the farming area may experience increased temperatures the next 10–15 years, including more days with temperatures above 17°C. Based on the predicted future conditions, we designed a study with Atlantic cod (Gadus morhua L.) to evaluate effects from high temperature alone and in combination with Fransicella noatunensis infection. Fish were kept at 12°C and 17°C for eight weeks and samples of skin and spleen collected at different timepoints were analysed with transcriptomics, histology, scanning electron microscopy and immunohistochemistry.

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Project description:Lipid metabolism is essential in maintaining energy homeostasis in multicellular organisms. In vertebrates, the peroxisome proliferator-activated receptors (PPARs, NR1C) regulate the expression of many genes involved in these processes. Four Ppar subtypes from Atlantic cod (Gadus morhua) were recently cloned and characterized. However, the downstream regulatory role of Ppars in cod lipid metabolism is presently not well understood or described. Here we study the involvement of Atlantic cod Ppar subtypes in systemic regulation of lipid metabolism using the model agonists WY14,643, GW501516, and tetradecylthioacetic acid, employing a multiple omics approach after an in vivo exposure situation.

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Project description:In order to investigate the underlying mechanisms of methylmecury (MeHg)-mediated toxicity to Atlantic cod (Gadus morhua), we analyzed the liver proteome of fish exposed in vivo to MeHg (0, 0.5, 2 mg/kg body weight) for 2 weeks. Label-free quantitative mass spectrometry enabled quantification of 1143 proteins, and 125 were differentially regulated between MeHg-treated samples and controls. Six proteins among the top differentially regulated (T23O, GLNA EPS8L2, APOA4, RAP1B, CZTZ) were analyzed using selected reaction monitoring (SRM). Supported by bioinformatics analyses, we conclude that MeHg disrupts mainly redox homeostasis and energy generating metabolic pathways in cod liver, the latter potentially modulated through MeHg-induced oxidative stress.

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