Table 4 Spearman rank correlation matrix for the depth of the oxycline (Z _oxy) (1 ml l^{− 1}), the depth of the thermocline (Z _therm) (15°C), and the weighted mean depth (WMD) and percentage found in the oxygenated layer (P _oxy) for the most abundant and frequent taxa

Z _oxy

NS

0.81

WMD A. tonsa adults

0.67

0.82

WMD A. tonsa copep.

NS

NS

WMD A. tonsa nauplii

NS

NS

WMD E. inermis adults

NS

NS

WMD C. brachiatus adults & copep.

0.63

0.80

WMD P. parvus adults & copep.

0.47

0.76

WMD Magelona sp. larvae

NS

0.64

WMD Oikopleura sp.

0.53

0.70

WMD H. thalassius adults & copep.

0.48

0.53

WMD P. polyphemoides

0.59

0.74

P_oxy A. tonsa adults

NS

NS

P_oxy A. tonsa copep.

0.60

NS

P_oxy A. tonsa nauplii

0.60

0.70

P_oxy E. inermis adults

NS

NS

P_oxy E. inermis nauplii

0.57

NS

P_oxy C. brachiatus adults & copep.

NS

NS

P_oxy P. parvus adults & copep.

NS

NS

P_oxy Magelona sp. larvae

NS

NS

P_oxy Oikopleura sp.

NS

NS

P_oxy Limacina sp.

NS

0.89

P_oxy H. thalassius adults & copep.

NS

NS

P_oxy Discinisca lamellosa larvae

NS

NS

P_oxy P. polyphemoides

NS

NS