MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Zygochlamys patagonica epibionts in deep water, SW Atlantic Ocean
Autor/es:
SCHEJTER, L.; LÓPEZ GAPPA, J.; BREMEC, C.S.
Lugar:
Florianópolis
Reunión:
Workshop; 19th International Pectinid Workshop; 2013
Institución organizadora:
19th International Pectinid Workshop
Resumen:
In southern SW Atlantic, the continental slope shows many recognized submarine canyons, varying in depth and extension. The Argentinean continental slope is cut by multiple deep submarine canyons and channels crossing the upper continental slope in a W-E direction, organised in two submarine canyon systems, the Ameghino and the Patagonia (or Almirante Brown) systems (Ewing et al. 1964, Lastras et al. 2011). Recent studies were focused on megafauna living near canyon areas outside the Argentinean shelf break (Portela et al., 2012), while within one of the canyons (43º35´S - 59º33´W, 325 m depth), the only available information refers to the general composition of the benthic invertebrate community (Bremec and Schejter, 2010) and to taxonomy of sponges collected as part of the assemblage (Bertolino et al., 2007). In this deep habitat, the Patagonian scallop contributed with nearly 20% of the total biomass, and taxa richness inside canyon, which remained undisturbed, was higher than in the surrounding fishing grounds. It is well known that most basibiont species are found in larger hard shelled molluscs and crustaceans (Wahl 2009), which, in different habitats or regions, often feature different epibiotic species or different degrees of epibiotic coverage (Reiss et al. 2003, Dougherty and Russell 2005, Wahl 2009).   In order to update information, we studied the epibiotic species settled on Patagonian scallops collected from a submarine canyon at the Argentinean continental margin