Fig. 2

Heatmap of the microarray expression data for the 18 up- and 9 downregulated genes, where each row represents a gene and each column represents an individual fish (LT = 5 individuals and HT = 4 individuals). Key color representing the level of expression (green: high expression and red: low expression). The dendograms provide information of the similarity between genes and between the different samples. Notice that all HT samples and all but one LT samples cluster together. LT, low temperature group; HT, high temperature group. See Additional file 1: Table S2 for a complete list of gene names and abbreviations