Gareth Gillard

Salmon farmed on modern feeds contains less of the healthy, long-chain fatty acids (EPA and DHA) than before. Up until the turn of the millennium, farmed salmon were fed fish oil as a replacement for their omega-3 rich natural prey. However, fish oil is now a scarce resource, and more than half of the fat in modern feeds comes from plant oils that are inexpensive, but devoid of long-chain omega-3 fatty acids. How can we increase the omega-3 content of salmon on sustainable feeds?

One option is ...

Towards the Digital Salmon: From a reactive to a pre-emptive research strategy in aquaculture (DigiSal)

Salmon farming in the future must navigate conflicting and shifting demands of sustainability, shifting feed prices, disease, and product quality. The industry needs to develop a flexible, integrated basis of knowledge for rapid response to new challenges. Project DigiSal will lay the foundations for a Digital Salmon: an ensemble of mathematical descriptions of salmon physiology, combining ...

Source: Gareth Gillard. (24 June 2016)

TO DO : Library preparation- Tom and Gareth

File types: Raw counts from HTSeq-count - .counts.txt CPM - .CPM.txt log2 scaled CPM - .log2CPM.txt FPKM - .FPKM.txt log2 scaled FPKM - log2FPKM.txt The scaled counts (CPM, FPKM) are derived from the raw counts, and used TMM normalised effective library sizes (using edgeR functions).

For feed switch experiment:

Count tables, separated for liver and gut tissue (can alter sample separation at any point) ...

Read counts for each sample

FPKMs or Fragments Per Kilobase of exon per Million reads . Fragment means fragment of DNA, so the two reads that comprise a paired-end read count as one. Per kilobase of exon means the counts of fragments are then normalized by dividing by the total length of all exons in the gene (or transcript). This bit of magic makes it possible to compare Gene A to Gene B even if they are of different lengths. Per million reads means this value is then normalized against the library size. This bit of magic ...

Column 1: Row numbers Column 2: Sample id (See below) Column 3: Water (Fish from salt water or fresh water) Column 4: Tissue (Liver or Gut) Column 5: Feed (MA- Marine oil, VO- Vegetable oil) Column 6: Day Column 7: Count file location

Column 2 explained: The freshwater fish have no tank numbers and saltwater fish do have tank numbers eg : 69-D0-MA-G-1 - > 69 well position (id given when sequncing), Day 0, Marine oil, Gut, Fish number 1 147-D16-VO-MA-L-6 -> 147 well position, Day 16, Vegetable ...

FPKMs or Fragments Per Kilobase of exon per Million reads . Fragment means fragment of DNA, so the two reads that comprise a paired-end read count as one. Per kilobase of exon means the counts of fragments are then normalized by dividing by the total length of all exons in the gene (or transcript). This bit of magic makes it possible to compare Gene A to Gene B even if they are of different lengths. Per million reads means this value is then normalized against the library size. This bit of magic ...

Read counts for each sample

Describes how the DNA was isolated from salmon intestinal samples before preparations of 16S rRNA gene amplicons for the Illumina MiSeq system.