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Artículo

Marine fronts are important fishing areas for demersal species at the Argentine Sea (Southwest Atlantic Ocean)

Alemany, DanielaIcon ; Iribarne, Oscar OsvaldoIcon ; Acha, Eduardo MarceloIcon
Fecha de publicación: 01/2014
Editorial: Elsevier Science
Revista: Journal of Sea Research
ISSN: 1385-1101
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Bioquímica y Biología Molecular

Resumen

The high primary and secondary production associated with frontal systems attract a diversity of organisms due to high prey availability; this is why a strong relationship between fronts and pelagic fisheries has been shown worldwide. In the Argentine Sea, demersal resources are the most important, both in economical and in ecological sense; so we hypothesize that fronts are also preferred fishing areas for demersal resources. We evaluated the relationship between spatial distribution of fishing effort and oceanographic fronts, analyzing three of the most important frontal systems located in the Argentine Sea: the shelf-break front, the southern Patagonia front and the mid-shelf front. Individual vessel satellite monitoring system data (VMS; grouped by fleet type: ice-trawlers, freezer-trawlers and jigging fleet) were studied and fishing events were identified. Fishing events per area were used as a proxy of fishing effort and its spatial distribution by fleet type was visualized and analyzed with Geographic Information Systems. Oceanographic fronts were defined using polygons based on satellite chlorophyll amplitude values, and the percentage of fishing events within each polygon was calculated. Results showed a positive association between fronts and fishing activities of the different fleets, which suggests the aggregation of target species in these zones. The coupling of the freezer-trawler and jigging fleets (that operate on lower trophic level species; Macruronus magellanicus and Illex argentinus respectively) with fronts was higher than the ice-trawler fleet, targeting species of higher trophic level (Merluccius hubbsi). Marine fronts represent important fishing areas, even for demersal resources, as the distribution of fishing fleets and fishing effort are positively associated with frontal zones.
Palabras clave: Chlorophyll , Demersal Fish , Fishing Fleet , Frontal System , Squid , Trophic Level
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
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URI: http://hdl.handle.net/11336/25640
URL: http://www.sciencedirect.com/science/article/pii/S1385110113002463
DOI: http://dx.doi.org/10.1016/j.seares.2013.12.006
Colecciones
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos(CCT - MAR DEL PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MAR DEL PLATA
Citación
Alemany, Daniela; Iribarne, Oscar Osvaldo; Acha, Eduardo Marcelo; Marine fronts are important fishing areas for demersal species at the Argentine Sea (Southwest Atlantic Ocean); Elsevier Science; Journal of Sea Research; 87; 1-2014; 56-67
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