
handle: 20.500.12958/3246
Los calamares son especies de corta vida y presentan alta plasticidad fenotípica en respuesta a factores ambientales. Entre las respuestas a cambios ambientales la estructura poblacional ha sido estudiada en muchas especies de calamares incluyendo a Dosidicus gigas. Sin embargo, un análisis de mayor cobertura espacial y temporal que permita inferir la rapidez y grado de respuesta de cambio de la estructura poblacional no ha sido abordado en el Pacífico sur este. Basados en datos de la longitud de manto, registrados en diferentes cruceros y prospecciones realizados antes de 1991, así como tallas registradas en su pesquería en aguas peruanas, en este trabajo se analiza y discuten las variaciones espacio temporales de la estructura poblacional por tallas para el periodo 1958-2015. Los resultados muestran que su estructura poblacional puede cambiar rápidamente asociada al tamaño de madurez gonadal. Latitudinalmente, no se observan diferencias en la estructura poblacional, mientras que longitudinalmente ejemplares de menor tamaño se observan a mayores distancias a la costa.
ABSTRACT: Squids are short-lived species with high phenotypic plasticity in response to environmental factors. Among the responses to environmental changes, population structure has been studied in many species of squids, including D. gigas. However, an analysis of major amplitude spatial and temporal that allows inferring the degree of response of change of the population structure has not been addressed in the Southeast Pacific. In this sense, based on mantle length data recorded during different cruises and surveys conducted before 1991, as well as on the sizes recorded during its fishery in Peruvian waters, this paper analyzes and discusses the spatial and temporal variability of the population structure in this area for the period 1958-2015. The results show that the population structure can change rapidly associated to the size of gonadal maturity. By latitude, there are no differences in the population structure, while longitudinally smaller specimens are observed at greater distances to the shore.
Instituto del Mar del Perú
Estructura por tallas, Calamar gigante, Dosidicus gigas, Variabilidad
Estructura por tallas, Calamar gigante, Dosidicus gigas, Variabilidad
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