Abstract

GARATE, Antonio  and  PACHECO, Aldo. Distribution changes and abundance of shallow water’s ictiofauna in San Bartolo (Lima, Perú) after the ENSO 1997-1998. Ecol. apl. [online]. 2004, vol.3, n.1-2, pp.148-153. ISSN 1726-2216.

The tropicalization of shallow waters of Bahía Sur at San Bartolo beach by El Niño Event was shown by changes in the distribution of fishes. In order to evaluate and report the variability during a period after perturbation, diving observations were made between February - May 1999, and January - July 2000. The results of this study show that species of the Panamanian Province, which invaded the bay expanding their latitudinal distribution during El Niño disappeared progressively through the study period, while other local residents of the Peruvian - Chilean province did not change their typical distribution. As a general conclusion, it can be stated that, during the post ENSO, species generate different responses: some of the species from the Panamanian Province are able to expand their natural distribution limits, and then progressively disappear, while other species show a great capacity of acclimation under this natural disturbance.

Keywords : Fishes; distribution; abundance; ENSO; Biogeographic province.

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