Artículo
Seabird and marine-mammal attendance and by-catch in semi-industrial trawl fisheries in near-shore waters of northern Argentina
Seco Pon, Juan Pablo
; Copello, Sofía
; Morettini, Ariel; Lértora, Hugo Pablo; Bruno, Ignacio; Bastida, Julian; Mauco, Laura
; Favero, Marco
Fecha de publicación:
03/2013
Editorial:
Csiro Publishing
Revista:
Marine and Freshwater Research
ISSN:
1323-1650
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Seabird and marine-mammal attendance and by-catch in mid-water and bottom otter semi-industrial coastal pair-trawl fisheries were assessed for the first time in northern Argentina. Observers were placed onboard trawlers between autumn 2007 and autumn 2008. Fifteen marine top-predator species were associated with the vessels. The most abundant and frequent seabirds (trawl fisheries combined) were the kelp gull, Larus dominicanus (~70% of total birds and >96% occurrence), and the Olrog’s gull, L. atlanticus (~12% and >50%, respectively). Other seabird taxa such as Procellariiforms and Sphenisciforms, among others, were represented in very low numbers. The only mammal species recorded was the South American sea lion, Otaria flavescens (1% and 2%, respectively). Analysis of environmental and operational variability affecting the abundance of gulls indicated a significant increase in abundance with fishing depth, time of day, seasonality, wind intensity and wind direction. Incidental mortality of top predators was low and comprised only Magellanic penguins, Spheniscus magellanicus, in the mid-water gear. The results of the present study showed that the semi-industrial trawl fisheries operating in coastal waters in northern Argentina may a have a relatively minor impact on marine top-predator populations, at least in terms of incidental capture.
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Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Citación
Seco Pon, Juan Pablo; Copello, Sofía; Morettini, Ariel; Lértora, Hugo Pablo; Bruno, Ignacio; et al.; Seabird and marine-mammal attendance and by-catch in semi-industrial trawl fisheries in near-shore waters of northern Argentina; Csiro Publishing; Marine and Freshwater Research; 64; 3-2013; 237-248
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