English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/104284
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Structure and dynamics of cephalopod assemblages in the water column on shelf-break and slope grounds of the western Mediterranean

AutorQuetglas, Antoni; Valls, Maria; Ordines, Francesc; de Mesa, A.; Olivar, M. Pilar ; Keller, S.; Massutí, Enric
Palabras claveNycthemeral rhythms
Mediterranean Sea
Pelagic environment
Population density
Cephalopod fisheries
Fecha de publicaciónoct-2014
EditorElsevier
CitaciónJournal of Marine Systems 138: 150-159 (2014)
ResumenThe structure and dynamics of cephalopod assemblages in different bathymetric strata from the surface to bottom grounds, down to a depth of 900. m, in the western Mediterranean, were analysed. Data were collected both on the shelf-break and slope during the summer and early autumn surveys, using a midwater trawl and a bottom trawl gear, to catch pelagic and nektobenthic species, respectively. The pelagic tows were not random, but targeted at the strongest and widest acoustic sound layers. A total of 26 cephalopod species belonging to 12 families were collected. With regard to the abundance, biomass and frequency of occurrence, we did not find a common seasonal trend for all the species, suggesting that their population dynamics are not governed by major environmental drivers. Most assemblage metrics (e.g., diversity, species richness, abundance and biomass) showed similar, low values in the pelagic layers compared to the bottom grounds. In general, assemblage metrics were lower in summer than in autumn on the shelf-break, while showing an inverse seasonal trend on the slope. There was a clear general increase in all metrics during the night compared to the day. Cluster results revealed differences in diel migratory strategies by stratum, vertical movements being scarce in the shelf-break species, but intense in the slope species. © 2013 Elsevier B.V.
DescripciónSpecial issue The wrapping up of the IDEADOS project: International Workshop on Environment, Ecosystems and Demersal Resources, and Fisheries.-- 10 pages, 5 figures, 3 tables
Versión del editorhttp://dx.doi.org/10.1016/j.jmarsys.2013.11.015
URIhttp://hdl.handle.net/10261/104284
DOI10.1016/j.jmarsys.2013.11.015
Identificadoresdoi: 10.1016/j.jmarsys.2013.11.015
issn: 0924-7963
e-issn: 1879-1573
Aparece en las colecciones: (ICM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.