Results of simultaneous determinations of chlorophyll "a" concentrations and primary production in the northeastern part of the Tropical Atlantic in spring 1977 are discussed. Primary production was low (250-350 mg C/m2/day in the open parts of the ocean and high (600-1500 mg C/m2/day) mainly in zones of current divergences and coastal region of the West Africa. Chlorophyll "a" concentration throughout the euphotic zone varied from 6 to 36 mg/m3 and in the surface layer from 0.05 to 0.60 mg/m3. Uneven distribution of primary production is due to physiological condition of phytoplankton.

Supplement to: Berseneva, G P (1981): Primary production and the chlorophyll "a" concentration in the eastern part of the Tropical Atlantic. Oceanology, 21(2), 243-246