Skip to main content
×
Home
    • Aa
    • Aa

Fish assemblages on the slope in the Catalan Sea (western Mediterranean): influence of a submarine canyon

Abstract

The analysis of 35 bottom trawls taken on the slope in the Catalan Sea (western Mediterranean) has shown the existence of two different demersal fish assemblages occurring on the upper (350–650 m) and middle (1150–1300 m) slope. The middle slope assemblage is characterized by much higher values in some ecological parameters such biomass and mean fish weight, resulting from the dominance of middle to large size species (e.g. Alepocephalus rostratus, Trachyrhynchus trachyrhynchus, Mora mom). On the upper slope two different stations were considered, one inside and the other outside a submarine canyon. Only slight differences were found in species composition, and hence sample and species were not clearly separated by a correspondence analysis. However, some interesting ecological differences exist between these two stations. Much higher values in abundance and biomass inside the canyon were indicative of higher food availability there. Moreover, a drop in mean fish weight was also noted inside the canyon. The analysis of size distributions in the commonest species along the upper slope showed that the submarine canyon acts as a recruiting ground for some of them.

Copyright
Corresponding author
*Instirut de Ciencies del Mar-CSIC, Passeig Nacional s/n, 08039 Barcelona, Spain
Institut d'Esrudis Avanqats de les Illes Balears, Campus Universitari, 07071 Palma de Mallorca, Spain
Centre Oceanogràfic de les Balears-I.E.O., Apartado 291,07080 Palma de Mallorca, Spain
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

G. Bianchi & T. Høisaeter , 1992. Relative merits of using numbers and biomass in fish community studies. Marine Ecology Progress Series, 85, 2533.

F. De Bovee , L.D. Guidi & J. Soyer , 1990. Quantitative distribution of deep-sea meiobenthos in the north-western Mediterranean (Gulf of Lion). Continental Shelf Research, 10, 11231145.

M. Carrassón & J. Matallanas , 1990. Preliminary data about the feeding habits of some deep-sea Mediterranean fishes. Journal of Fish Biology, 36, 461463.

J.D.M. Gordon & J.A.R. Duncan , 1985. The ecology of deep-sea benthic and benthopelagic fish on the slopes of the Rockall Trough, north-eastern Atlantic. Progress in Oceanography, 15, 3769.

R.L. Haedrich & N.R. Merrett , 1988. Summary atlas of deep-living demersal fishes in the North Atlantic Basin. Journal of Natural History, 22, 13251362.

E. Macpherson , 1979. Ecological overlap between macrourids in the western Mediterranean Sea. Marine Biology, 53, 149159.

E. Macpherson , 1981. Resource partitioning in a Mediterranean demersal fish community. Marine Ecology Progress Series, 4, 183193.

N.R. Merrett & N.B. Marshall , 1981. Observations on the ecology of deep-sea bottom-living fishes collected off northwest Africa (08°27′N). Progress in Oceanography, 9, 185244.

A. Monaco , P. Biscaye , J. Soyer , R. Pocklington & S. Heussner , 1990. Particle fluxes and ecosystem response on a continental margin: the 1985–1988 Mediterranean ECOMARGE experiment. Continental Shelf Research, 10, 809839.

C. Stefanescu , D. Lìoris & J. Rucabado , 1992a. Deep-living demersal fishes in the Catalan Sea (western Mediterranean) below a depth of 1000 m. Journal of Natural History, 26, 197213.

C. Stefanescu , D. Lloris & J. Rucabado , 1993. Deep-sea fish assemblages in the Catalan Sea (western Mediterranean) below a depth of 1000 m. Deep-Sea Research l, 40, 695707.

C. Stefanescu , J. Rucabado & D. Lloris , 1992b. Depth-size trends in western Mediterranean demersal deep-sea fishes. Marine Ecology Progress Series, 81, 205213.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 5 *
Loading metrics...

Abstract views

Total abstract views: 70 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 26th May 2017. This data will be updated every 24 hours.