Characterization of Chilean hoki (Macruronus magellanicus) aggregations off central-southern Chile

Queirolo D.; Zamora V.; Hurtado C.; Montenegro I.; Melo, T; Merino J.; Gaete E.; Escobar R.

Abstract

A monthly characterization of Chilean hoki aggregations was done using acoustic records obtained with SIMRAD EK60 and ES60 devices aboard three multipurpose vessels that operated in the central-southern fishery unit during 2003; this considered morphological and bathymetric descriptors. The wide morphological variation of the aggregations was explained by their cohesion level and tendency to form large horizontal aggregations whereas, bathymetrically, 90% of the aggregations were located between 300 and 450 m. Evidence of associations between various descriptors was found, and these were, in turn, associated with other factors such as mean size, water temperature, latitude, and month, allowing an adequate description of the shape of the aggregations and their location in the water column. The relevant relationships were: aggregation depth with regard to bottom depth (r = 0.55), aggregation altitude with regard to bottom depth (r = 0.72), aggregation altitude with respect to the relative depth index (r = -0.98), and aggregation depth with respect to mean size (r = 0.66).

Más información

Título según WOS: Characterization of Chilean hoki (Macruronus magellanicus) aggregations off central-southern Chile
Título según SCOPUS: Characterization of Chilean hoki (Macruronus magellanicus) aggregations off central-southern Chile Caracterización de agregaciones de merluza de cola (Macruronus magellanicus) en la zona centro-sur de Chile
Título de la Revista: LATIN AMERICAN JOURNAL OF AQUATIC RESEARCH
Volumen: 36
Número: 2
Editorial: Facultad de Recursos Naturales. Escuela de Ciencias del Mar, Pontificia Universidad Católica de Valparaíso
Fecha de publicación: 2008
Página de inicio: 259
Página final: 269
Idioma: Spanish
URL: http://www.lajar.cl/pdf/imar/v36n2/Articulo_36_8.pdf
DOI:

10.3856/vol36-issue2-fulltext-8

Notas: ISI, SCOPUS