Caracterización de agregaciones de merluza de cola (Macruronus magellanicus) en la zona centro-sur de Chile

Dante Queirolo, Víctor Zamora, Carlos Hurtado, Ivonne Montenegro, Teófilo Melo, José Merino, Erick Gaete, Roberto Escobar

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

1 Cita (Scopus)

Resumen

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).

Título traducido de la contribuciónCharacterization of Chilean hoki (Macruronus magellanicus) aggregations off central-southern Chile
Idioma originalEspañol
Páginas (desde-hasta)259-269
Número de páginas11
PublicaciónLatin American Journal of Aquatic Research
Volumen36
N.º2
DOI
EstadoPublicada - 2008
Publicado de forma externa

Palabras clave

  • Aggregations
  • Bathymetric descriptors
  • Chile
  • Chilean hoki
  • Macruronus magellanicus
  • Morphological descriptors

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