Fig. 2

Heatmap of transcripts involved in endocrine regulation of the brain–pituitary–gonadal (BPG) axis. Transcripts are clustered by average FPKM value. A total of 36 transcripts (28 complete and 8 partial ORFs) formed eight clusters (G1 to G8). The partial ORFs are indicated with their direction in parentheses. Red and blue indicate higher and lower expression, respectively. GenBank accession numbers of contigs used for clustering analysis are shown in Additional file 7: Table S6