Abstract
The Zooplankton groups in general, and the copepoda group in particular, were determined and quantified. Changes were observed in their latitudinal distribution in the area between 6°00′ and 12°38'S and up to 270 n. mi (513 km) off the coast during January and February 1983. The biomass fluctuated between 3 and 18 mL m−2, where the highest values are given by organisms typical of subtropical surface waters such as giltheads, appendicularians, and oceanic copepods. Because of the tropicalizing effect of the study area, a density decrease of larval stages of Zooplankton typical for the area was observed, while prawn larval stages, unusual for the area, were found. Furthermore, there is a significant increase of carnivorous and omnivorous genera of the Copepoda group, such as Centropages, Candacia, Euchaeta, and Labidocera, all identified as predators of anchovy and sardine larvae.
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