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Size-related dietary changes observed in the squid Moroteuthis ingens at the Falkland Islands: stomach contents and fatty-acid analyses
Citation
Phillips, K and Nichols, PD and Jackson, GD, Size-related dietary changes observed in the squid Moroteuthis ingens at the Falkland Islands: stomach contents and fatty-acid analyses, Polar Biology, 26, (7) pp. 474-485. ISSN 0722-4060 (2003) [Refereed Article]
DOI: doi:10.1007/s00300-003-0509-9
Abstract
Dietary composition of the onychoteuthid squid Moroteuthis ingens at the Falkland Islands was related to predator size, as shown by stomach contents and fatty-acid analyses. Comparisons were made between two size classes of squid: those of mantle length <200 mm and those of mantle length >200 mm. Smaller squid had frequently consumed crustaceans and cephalopods; fish were of secondary importance. Larger squid consumed mostly fish and moderate amounts of cephalopods, but had rarely consumed crustaceans. These findings were supported by comparisons drawn between digestive-gland fatty-acid profiles and the fatty-acid profiles of potential prey species. Fatty-acid analyses indicated that the crustaceans Euphausia lucens, Munida gregaria and Themisto gaudichaudii were important prey items of smaller squid, whereas stomach content and fatty-acid analyses indicated that Gymnoscopelus nicholsi of around 100 mm standard length represented much of the fish prey of larger squid.
Item Details
Item Type: | Refereed Article |
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Research Division: | Biological Sciences |
Research Group: | Ecology |
Research Field: | Marine and estuarine ecology (incl. marine ichthyology) |
Objective Division: | Environmental Management |
Objective Group: | Marine systems and management |
Objective Field: | Marine biodiversity |
UTAS Author: | Phillips, K (Ms Katrina Phillips) |
UTAS Author: | Nichols, PD (Dr Peter Nichols) |
UTAS Author: | Jackson, GD (Dr George Jackson) |
ID Code: | 29092 |
Year Published: | 2003 |
Web of Science® Times Cited: | 44 |
Deposited By: | IASOS |
Deposited On: | 2003-08-01 |
Last Modified: | 2004-05-04 |
Downloads: | 0 |
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