Stock composition and fishery of Illex argentinus in San Matías Gulf

MORSAN, ENRIQUE M.; GONZÁLEZ, RAÚL A.; KROECK, MARINA A.

Avances en Métodos y Tecnología Aplicados a la Investigación Pesquera

Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)

Lugar: Mar del Plata, Argentina; Año: 1999; p. 161 - 164

The shortfin squid, Illex argentinus, is caught as by catch of hake (Merluccius hubbsi) by the trawler fleet in the San Matías Gulf (SMG) demersal trawl fishery. Size distribution, gonadal stages and parasitic composition were recorded monthly for three years: 1991 – 1993, Two demographic units were identified from the sample analysis: Spring Spawning Stock (SPR) and Summer Spawning Stock (SSS). Since 1994, 5 jiggers are admitted to fish from June to August each year. Spatial and temporal variation of CPUE annual series were analyzed. Demographic, parasitic composition and fishery information supports the hypothesis of immigration from the Continental Shelf to SMG during the fall –winter. Recruitment inside SMG may fail due to spring low sea water temperatures.