Eufáusidos de Isla de Pascua

Abstract

The spatial distribution and relative abundance of Euphausiacea, during May 1994, in waters around Easter Island, are analyzed. Zooplankton was sampled at 16 oceanographic stations. Double oblique sampling was done with Bongo net between the surface and 250 m depth. The community structure of euphausiids was analyzed using constancy and dominance. Euphausiids were present at all stations, and its diversity was most high in the most oceanic stations. Considering the numeric constancy and dominance the most important species were Stylocheiron affine and S. suhmii. The island presence and oceanographic influence in spatial distribution and relative abundance patterns of euphausiids around island don't was detected. It was associated to sampling scale. Probably the spatial distribution and relative abundance of euphausiids is related principally to behavior and vertical migration.