Mouth diameter of the net was 113 cm, mesh size 250 µm. Samples were immediately fixed with formaldehyde (2-4% final concentration) for specimen identification and counts. Volumes of filtered seawater were estimated by multiplying the area of the net mouth by heights of sampled layers from winch readings. Identification and counts of specimens were performed on aliquots (1/8-1/2) of entire samples by using the Huntsman beaker subsampling technique (Van Guelpen et al., 1982) Copepods were identified to the species level but not separated into females, males and juveniles (copepodites). All other taxa were identified at the species level when possible, or at higher taxonomic levels. Taxonomic identification was done according to the most relevant and updated taxonomic literature.