Plankton samples were collected with a centrifugal pumping system. A 5 cm diameter hose was connected to the CTD rosette and a deck-mounted pump. Output from the CTD provided information on the depth from which each sample was collected. Water from the pump was passed through a 100 μm mesh net suspended in a large tub of water. The pumping rate was 227 l min–1, and 680 l were sampled at each depth. Sampling depths were selected based upon the water depth. At the shallowest stations (1 km from shore and