Distribución y abundancia del microzooplancton en aguas del Atlántico Sudoccidental (CAMPAÑA TABIA II).

THOMPSON G; ULIANA E; ALDER V; BOLTOVSKOY D; BRANDINI F

Santos, Sao Paulo, Brasil

Congreso; VII COLACMAR; 1997

Instituto Oceanografico da Universidade de Sao Paulo

Absolute abundances of planktonic foraminifers, tintinnids, polycystine and pheodarian radiolarians, pelagic crustacean larvae, and pteropods were estimated from 27 samples collected at 22 stations in the Southwestern Atlantic (30-60°S, along 51-56°W) in November 1994, mainly from two depths: 0-5 m and 5-15 m. Latitudinal distribution was found to be similar for both layers, with a decrease of abundance with depth. Two areas characterized by special oceanographic features and with atypical microzooplanktonic concentrations (at 36-37°S and at 42-44°S) are described. Preliminary results on the vertical distribution patterns of the microzooplanktonic groups surveyed in the upper 100 m are analyzed in relationship with temperature profiles