CTD profiles from stations analysed for copepod abundance.

<p>A, temperature. B, dissolved oxygen concentration. C, fluorescence (in relative units as proxy for chlorophyll <i>a</i> concentration). Shades of gray correspond to different station groups (SG1, 3, and 4) according to species composition derived from cluster analysis; SG1 = black, SG3 = dark gray, SG4 = light gray. CTD data for SG2 were not available. Note the different scaling of the y-axes.