http://www.cnr.it/ontology/cnr/individuo/prodotto/ID6713
Distribution and spatial structure of pelagic fish schools in relation to the nature of the seabed in the Sicily Channel (Central Mediterranean). (Articolo in rivista)
- Type
- Label
- Distribution and spatial structure of pelagic fish schools in relation to the nature of the seabed in the Sicily Channel (Central Mediterranean). (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1111/j.1439-0485.2009.00328.x (literal)
- Alternative label
D'Elia M.; Patti B.; Sulli A.; Tranchida G.; Bonanno A.; Basilone G.; Giacalone G.; Fontana I.; Genovese S.; Guisande C.; Mazzola S. (2009)
Distribution and spatial structure of pelagic fish schools in relation to the nature of the seabed in the Sicily Channel (Central Mediterranean).
in Marine ecology (Berl.); Blackwell Publishing, Oxford (Regno Unito)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- D'Elia M.; Patti B.; Sulli A.; Tranchida G.; Bonanno A.; Basilone G.; Giacalone G.; Fontana I.; Genovese S.; Guisande C.; Mazzola S. (literal)
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- http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0485.2009.00328.x/abstract;jsessionid=5F16337C75357121AA23EE8D523D11AE.d01t02 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
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- Note
- Scopu (literal)
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Istituto per l'Ambiente Marino Costiero, Consiglio Nazionale delle Ricerche, Sede di Mazara del Vallo, Mazara del Vallo (TP), Italy
Dipartimento di Geologia e Geodesia di Palermo, Palermo, Italy
Facultad de Ciencias, Campus Universitario Lagoas-Marcosende, Universidad de Vigo, Vigo, Spain (literal)
- Titolo
- Distribution and spatial structure of pelagic fish schools in relation to the nature of the seabed in the Sicily Channel (Central Mediterranean). (literal)
- Abstract
- Hydroacoustic data collected during two echosurveys carried out in the Sicily
Channel in 1998 and 2002 were analysed to investigate the distribution and
spatial structure of small pelagic fish species in relation to the sedimentological
nature of the sea bottom. The study was carried out on two contiguous areas
(labelled ZONE 1 and ZONE 2) of the continental shelf off the southern coast
of Sicily, characterised by different dominant texture, 'sand' for ZONE 1 and
'clayey-silt' for ZONE 2. Simultaneous information on small pelagic fish
schools and the seabed was obtained using a quantitative echo-sounder (SIMRAD
EK500) that measures echoes due to the scattering from both fish schools
and the bottom surface. Acoustically determined fish school and seabed data
were integrated, respectively, with information on species composition obtained
by experimental fishing hauls, and with granulometric information obtained
from the analysis of in situ sediment samples. The results indicate a general
preference of small pelagic fish schools for seabeds of finer granulometry. First,
the occurrence of fish schools was higher over the acoustically classified 'soft'
seabeds of ZONE 2. Secondly, although ZONE 2 represents <30% of the total
length of daytime acoustic tracks analysed in this study, in both surveys the
bulk of fish biomass (>60%) was concentrated over 'soft' seabed substrates of
ZONE 2. Different species composition and ? or behaviour of fish schools in the
two areas investigated were postulated in relation to seabed conditions. Specifically,
over the hard and soft bottoms of ZONE 2, fish schools were found at
lower depths and at shallower bottom depths compared to ZONE 1. Furthermore,
over the softer bottoms of ZONE 2, fish schools exhibiting a more 'pelagic'
behaviour (i.e. detected at a greater distance from the bottom) showed a
preference for softer (and finer) seabed substrate conditions. Conversely, fish
schools exhibiting a more 'demersal' behaviour (i.e. at a smaller distance from
the bottom) were mostly found on relatively harder substrates. (literal)
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