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Título: | Shifting feeding behaviour of deep-sea buccinid gastropods at natural and simulated food falls |
Autor: | Aguzzi, Jacopo CSIC ORCID ; Jamieson, Alan; Fujii, T.; Sbragaglia, Valerio CSIC ORCID ; Costa, Corrado; Menesatti, Paolo; Fujiwara, Y. | Palabras clave: | Natural food falls Scavenging behaviour Baited cameras Landers Cabled observatories Zoarcids Tacita zenkevitchi Buccinum yoroianum |
Fecha de publicación: | jul-2012 | Editor: | Inter Research | Citación: | Marine Ecology Progress Series 458: 247-253 (2012) | Resumen: | The deep sea is a low food input environment, hence large food falls from the surface waters are important in suppor ting a wealth of scavenging deep-sea fauna. The pr obability of observing such events is ver y low, due to their unpr edictable and short-lived nature. The video system of a cabled obser vatory installed within a cold seep clam field in Sagami Bay (1100 m depth; Central Japan) recorded a rare event. We observed a fish dying directly in front of the cam era and being immediately perceived and preyed upon by Buccinum yoroianum (Neo gastropoda: Buccinidae), while still alive. Up to 76 large snails responded to the fish and consumed the carcass within ∼8 h, with no inter vention by decapod crustaceans. There was only small par ticipation of eelpouts (Zoarcidae). For comparison, we report on supplementary findings from a different area and depth of the Pacific Ocean. These obser vations were recorded by a baited camera lander which simulated a food fall. W ithin 6 h, the buccinid Tacita zenkevitchi aggregated on the bait, competing with fishes. These observations confirm that deep-sea buccinids can shift their feeding behaviour between active pr edation and scavenging. Our perception, however, seems condi tioned by the observational methodology we use: buccinids may appear as scavengers when using photography (e.g. by baited landers) pr oducing single snapshots in time, or as pr edators when observed in a natural setting and video-taped continuously with a cabled observatory. © Inter-Research 2012 | Descripción: | 7 pages, 3 figures, 1 table, supplementary material http://www.int-res.com/articles/suppl/m458p247_supp/ | Versión del editor: | https://doi.org/10.3354/meps09758 | URI: | http://hdl.handle.net/10261/91928 | DOI: | 10.3354/meps09758 | Identificadores: | doi: 10.3354/meps09758 issn: 0171-8630 e-issn: 1616-1599 |
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