Fig. 3.

Principal Component Analysis (PCA) of 21 samples represented by the expression of 16,259 probes passing QC filters. Each square represents a pool of approximately 500 copepodids exposed to seawater alone, acetone alone, or acetone and lufenuron (30–1500 ppb) for 3 h before a 21 h holding period in seawater, at which time lice were flash frozen and stored for RNA extractions.