Carbon and nitrogen stable isotopic inventory of the most abundant demersal fish captured by benthic gears in southwestern Iceland (North Atlantic)

Springer Science and Business Media LLC - Tập 63 - Trang 309-315 - 2009
Gianluca Sarà1, Maurizio De Pirro2, Mario Sprovieri3, Paola Rumolo3, Halldór Pálmar Halldórsson4,5, Jörundur Svavarsson4,5
1Dipartimento di Ecologia, Università di Palermo, Palermo, Italy
2Dipartimento di Biologia Animale e Genetica, Università degli Studi di Firenze, Florence, Italy
3IAMC-CNR, Naples, Italy
4Suðurnes University Research Centre, University of Iceland, Sandgerði, Iceland
5Institute of Biology, University of Iceland, Reykjavík, Iceland

Tóm tắt

Stable isotopes (δ13C and δ15N) were used to examine the origin of organic matter for the most representative demersal species of the SW Icelandic fishery, accounting for over 70% of landings of those species in the North Atlantic. Samples were collected during a 2-week period in early September 2004 from landings and directly during fishing cruises. Stable isotopes showed that particulate organic matter and sedimentary organic matter were at the base of the food web and appeared to fill two different compartments: the pelagic and the benthic. The pelagic realm was composed of only capelin and sandeel; krill and redfish occupied an intermediate position between pelagic and benthic realms; while anglerfish, haddock, cod and ling resulted as the true demersal species while tusk, rays and plaice were strongly linked to the benthic habitat.

Tài liệu tham khảo

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