Title Diet of the Antarctic starry skate Amblyraja georgiana (Rajidae, Chondrichthyes) at South Georgia (Southern Ocean)
Author Main, C.E.; Collins, M.A.
Author Affil Main, C.E., British Antarctic Survey, Cambridge, United Kingdom
Source Polar Biology, 34(3), p.389-396. Publisher: Springer-Verlag, Berlin, Germany. ISSN: 0722-4060
Publication Date Mar. 2011
Notes In English. Supplemental information/data is available in the online version of this article. 45 refs. GeoRef Acc. No: 309636
Index Terms Atlantic Ocean Islands--South Georgia; Southern Ocean; Atlantic Ocean Islands; behavior; Chordata; diet; ecology; feeding; habitat; Pisces; predators; Scotia Sea Islands; South Georgia; subantarctic regions; Vertebrata
Abstract Stomach contents were identified from 206 Antarctic starry skate (Amblyraja georgiana) that were collected during three groundfish surveys (September 2007, April 2008 and January 2009) at South Georgia, Southern Ocean. The diet of A. georgiana varied with skate size and between years. Preferred prey included fish (particularly for larger individuals) and Antarctic krill, Euphausia superba, as well as amphipods, polychaetes and other benthic fauna. The skate A. georgiana appears to be an opportunistic predator, and the clear presence of Antarctic krill in this demersal predator's diet may indicate a benthic habit of this euphausiid species, which has hitherto mainly been considered as occupying a purely pelagic niche.
URL http://hdl.handle.net/10.1007/s00300-010-0894-9
Publication Type journal article
Record ID 91411