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High occurrence of the elasipodid holothurian Penilpidia ludwigi (von Marenzeller, 1893) in bathyal sediment traps moored in a western Mediterranean submarine canyon

AutorPagès, Francesc ; Martín, Jacobo ; Palanques, Albert ; Puig, Pere ; Gili, Josep Maria
Palabras claveElasipodida
Submarine canyons
Fecha de publicacióndic-2007
CitaciónDeep Sea Research Part I: Oceanographic Research Papers 54(12): 2170-2180 (2007)
ResumenOne hundred and fifty specimens of the elasipod holothurian Penilpidia ludwigi (von Marenzeller, 1893) were collected in sediment traps moored near the seabed in the La Fonera Canyon (Catalan Sea, north-western Mediterranean) and on the adjacent continental slope. These provide the third record of this apparently endemic Mediterranean species and the first record from the western Mediterranean. This was the only holothurian species trapped and the most abundant macroscopic organism found in the traps between 1200 and 1700 m depth over the whole sampling period (March–November 2001). It was particularly abundant in spring during the main flux of organic particles in the canyon. This coupling suggests that Penilpidia may aggregate at the seafloor during these events, making food availability a plausible explanation of the seasonal occurrence. Lateral transport of material re-suspended locally or up-canyon by near bottom currents appear to be the mechanism behind this uncommon occurrence, although in situ observations have recently been made on the swimming capability of this holothurian. The occurrence of benthic organisms in sediment traps set close to the seabed can provide information on bathyal benthic and benthopelagic populations
Descripción11 pages, 5 figures, 2 tables
Versión del editorhttp://dx.doi.org/10.1016/j.dsr.2007.09.002
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