Assemblages in a submarine canyon: influence of depth and time

In this work we have studied the assemblages from Quirra canyon (Sardinia). We analysed data from 25 trawl samples from the canyon, made at different times and depth. A total of 71 demersal species (38 teleosts, 5 cartilaginous fishes, 13 molluscs and 15 crustaceans) were examined. We found four gro...

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Veröffentlicht in:	Hydrobiologia 2007-04, Vol.580 (1), p.265-271
Hauptverfasser:	Sabatini, A, Follesa, M. C, Locci, I, Pendugiu, A. A, Pesci, P, Cau, A
Format:	Artikel
Sprache:	eng
Schlagworte:	Agnatha. Pisces Animal and plant ecology Animal, plant and microbial ecology Aquatic habitats Biological and medical sciences Cluster analysis Crustaceans depth Fish assemblages Food availability Fundamental and applied biological sciences. Psychology General aspects Marine Mollusca Mollusks Multidimensional scaling Shellfish Submarine canyon Submarine canyons Synecology Teleostei Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
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Beschreibung
Zusammenfassung:	In this work we have studied the assemblages from Quirra canyon (Sardinia). We analysed data from 25 trawl samples from the canyon, made at different times and depth. A total of 71 demersal species (38 teleosts, 5 cartilaginous fishes, 13 molluscs and 15 crustaceans) were examined. We found four groups using cluster analysis; each group is characterised by a certain depth or time. In particular we have shown that the time of the day appears to have a role in the movement of shrimps and other species. This phenomenon seems to be linked to trophic need and by the consequent different food availability into the Canyon.
ISSN:	0018-8158 1573-5117
DOI:	10.1007/s10750-006-0445-0