Caracterización preliminar de hábitats y megafauna en caladeros de cigala (Nephrops norvegicus) del golfo de Cádiz a partir de imágenes submarinas
Authors
Gallardo-Núñez, M. (Marina); Rueda, J.L. (José Luis); Farias, C. (Carlos); González-García, E. (Emilio); Sánchez-Guillamón, O. (Olga); Bárcenas-Gascón, P. (Patricia); López-González, N. (Nieves); Vila, Y. (Yolanda)Editor/s
Díaz-del-Río-Español, V. (Víctor); Bárcenas-Gascón, P. (Patricia); Fernández-Salas, L.M. (Luis Miguel); López-González, N. (Nieves); Palomino, D. (Desirée); Rueda, J.L. (José Luis); Sánchez-Guillamón, O. (Olga); Vázquez, J.T. (Juan Tomás)Date
2015-09Type
book partKeywords
Benthossedimentary habitats
sea-pens
fisheries
Gulf of Cádiz
Abstract
Underwater images, sediment samples and CTD measurements were taken in Norway
lobster (Nephrops norvegicus) fishing grounds of the outer shelf and upperslope of the Spanish
margin of the Gulf of Cádiz for characterizing habitats, megafauna and spatial relationships with
environmental variables. A total of 58 taxa and 8 habitats were recorded, being sea-pen
communities on muddy sediments the most widespread. Depth, sediment type and bioturbation are
the most influencing variables on the spatial distribution of the habitats and associated megafauna.
Densities of some habitat forming species (e.g. Kophobelemnon stelliferum) were lower or similar to
those previously found in mud volcanoes located in the area, which should be restricted to trawling
activities. Nevertheless, habitat forming species display low densities in areas with dense
populations of N. norvegicus and high bioturbation, probably caused by lobster sediment
removilization and predation, therefore these areas should ...
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