Marine metagenome
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REPOSITORIES: ENA
Similar Datasets
Project description:Metabarcoding diet analysis of chub mackerel Scomber japonicus in the northern Satsunan area
| PRJDB11717 | ENA
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
Project description:Megaviridae metabarcoding diversity analysis data
| PRJDB8895 | ENA
Project description:The processing of seafood for human or animal consumption creates vast amounts of by-product, which is often considered waste. Although some of these by-products are used as fishmeal, bone-meal or fertilizer, as a whole, it remains under utilized. Significant amounts of proteins, lipid fractions, vitamins, and other bioactive molecules are present in these by-products, all with potential beneficial properties that could be used as alternatives to fishmeal or as supplements for aquaculture species. In an attempt to investigate their potential benefit in Atlantic salmon fish nutrition, nine experimental diets were formulated using by-products originating from various seafood processing plants. A control basal diet (no by-product added) was also formulated. Juvenile Atlantic salmons were fed one of the nine experimental diets (30% marine by-product, 70% basal diet) or the basal diet and hepatic gene expression profiling was done on fish fed each diet after 14 and 56 days. Analysis of hepatic gene expression revealed a significant amount of differentially expressed genes for each diet with roles in various pathways and biological processes. By comparing differences in hepatic gene expression levels with the nutritional composition of the various feeds, we were able to identify a number of nutritional elements that affect specific gene families. This information will be very useful for the formulation of novel fish feeds, which may be designed with specific aims, such as rapid growth, increased immunity or better general health This specific study is aimed at evaluating the hepatic transcriptional responses in juvenile Atlantic salmon fed with fish feed formulation supplemented with one of nine marine by-products.
2012-12-31 | E-GEOD-41325 | biostudies-arrayexpress
Project description:The processing of seafood for human or animal consumption creates vast amounts of by-product, which is often considered waste. Although some of these by-products are used as fishmeal, bone-meal or fertilizer, as a whole, it remains under utilized. Significant amounts of proteins, lipid fractions, vitamins, and other bioactive molecules are present in these by-products, all with potential beneficial properties that could be used as alternatives to fishmeal or as supplements for aquaculture species. In an attempt to investigate their potential benefit in Atlantic salmon fish nutrition, nine experimental diets were formulated using by-products originating from various seafood processing plants. A control basal diet (no by-product added) was also formulated. Juvenile Atlantic salmons were fed one of the nine experimental diets (30% marine by-product, 70% basal diet) or the basal diet and hepatic gene expression profiling was done on fish fed each diet after 14 and 56 days. Analysis of hepatic gene expression revealed a significant amount of differentially expressed genes for each diet with roles in various pathways and biological processes. By comparing differences in hepatic gene expression levels with the nutritional composition of the various feeds, we were able to identify a number of nutritional elements that affect specific gene families. This information will be very useful for the formulation of novel fish feeds, which may be designed with specific aims, such as rapid growth, increased immunity or better general health
2012-12-31 | GSE41325 | GEO
Project description:Natural diet and feeding environment of larval Japanese eel in the Pacific ocean
| PRJDB8891 | ENA
Project description:Current commercially available feeds for salmon are predominantly made of plant ingredients, with consequent changes to the composition and contents of a range of nutrients and other components in the diet. There are concerns that, with these major changes in raw materials, new feeds will affect not only the composition and contents of nutrients, but also the bioavailability and, combined with the limited knowledge of micronutrient requirements for Atlantic salmon, this might impact growth performance and health of the fish. The present study investigated the effects of graded levels of a micronutrient package supplemented to feeds formulated with low levels of marine ingredients and fed to diploid and triploid Atlantic salmon throughout the freshwater phase. Specifically, fish were fed three diets containing low levels of FM and FO and identical in formulation other than being supplemented with 3 levels (L1, 100 %; L2, 200 % and L3, 400 %) of a micronutrient mix formulated as a modification of current nutrient levels reported for salmon. Duplicate groups of diploid and triploid parr were fed the experimental diets from around 30 g to seawater transfer and the effects on growth performance, feed efficiency, biochemical composition, liver histology, hepatic gene expression (transcriptome) and smoltification efficiency determined. Microarray analysis revealed that the hepatic transcriptome profile of diploid fish fed diet L2 was more similar to that observed in triploids fed diet L3 than to those fed L2, suggesting that micronutrient requirements of triploid salmon may differ from levels accepted in diploid salmon. Different levels of micronutrient supplementation affected the expression of key genes involved in lipid metabolism. In particular sterol biosynthesis pathways (steroid and terpenoid backbone synthesis) were down-regulated in both L2-fed diploids and L3-fed triploids when compared with diet L1-fed diploids and triploids, respectively. Gene sets analysis showed an up-regulation of genes involved in immune processes in triploid salmon fed diet L3. Another biological category affected by diet in triploid salmon was genetic information processing. In fish fed diet L3 down-regulation of RNA degradation, proteasome, RNA polymerase, spliceosome and ribosome was observed, suggesting a decrease in protein turnover in this group, which may indicate a decrease in energy expenditure. In addition, one-carbon metabolism was affected by diet in diploid and triploid salmon.
2018-11-14 | E-MTAB-6302 | biostudies-arrayexpress