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Investigaciones marinas

versión On-line ISSN 0717-7178

Resumen

YANEZ R, Eleuterio; GONZALEZ C, Antonio  y  BARBIERI B, María Angela. Sea surface thermal structure associated to the space-temporal distribution of sardine and anchovy in northern Chile. Investig. mar. [online]. 1995, vol.23, pp.123-147. ISSN 0717-7178.  http://dx.doi.org/10.4067/S0717-71781995002300008.

In order to establish the space-temporal variability of the distribution of the sardine (Sardinops sagax) and the anchovy (Engraulis ringens) in association with the sea surface thermal structure in northern Chile (18°21'-24°00'S), a study was conducted with satellite and fisheries data between 1987 and 1992. Information was processed by using a geographic information system (GIS). Variables considered in the analysis included the abundance index CPUE as estimated for both species from a purse seine industrial fleet data, satellite records of sea surface temperature (SST), tidal gauge temperature and sea level data, and insolation and wind data from meteorological stations. In 1987 and 1992, the SST showed positive anomalies associated with El Niño events. The coldest year observed during the period of study was 1990. The SST annual signal is warmer between november and april, with the coldest records between july and september. The annual distribution of the CPUE is significantly different among species and between years for an individual species. Nevertheless, the migration pattern for both species is similar, moving from north to south, from the cold season to the warmer season. The pattern is altered by strong SST anomalies

Palabras clave : distribution; time-space; sardine; anchovy; satellite SST; northern Chile; GIS.

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