eCite Digital Repository

Lipid and fatty acid composition of the mantle and digestive gland of four Southern Ocean squid species: implications for food-web studies

Citation

Phillips, K and Nichols, PD and Jackson, GD, Lipid and fatty acid composition of the mantle and digestive gland of four Southern Ocean squid species: implications for food-web studies, Antarctic Science, 14, (3) pp. 212-220. ISSN 0954-1020 (2002) [Refereed Article]

DOI: doi:10.1017/S0954102002000044

Abstract

Lipid content, lipid class and fatty acid composition of four Southern Ocean cephalopod species - the myopsid Sepioteuthis australis and three oegopsids, Gonatus antarcticus, Moroteuthis robsoni and Todarodes spp. - were analysed. The lipid content of the digestive gland was consistently greater than that of the mantle, and was an order of magnitude greater in oegopsid species. The lipid class and fatty acid composition of the mantle and digestive gland also differed markedly in each species. Digestive gland lipid is likely to be of dietary origin, and large amounts of lipid in the digestive gland of oegopsids may accumulate over time. Thus the digestive gland is a rich source of fatty acid dietary tracers and may provide a history of dietary intake. However, the absolute amount of dietary lipid in the digestive gland of oegopsid species exceeds the absolute lipid content of mantle tissue. Therefore the overall lipid "signature" of an oegopsid may more closely resemble its prey species rather than its mantle tissue. When lipid techniques are used in dietary analysis of teuthophagous predators, squid may not be represented by a unique signature in analyses and their importance in the diets of predators may be underestimated.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Marine Flora, Fauna and Biodiversity
Author:Phillips, K (Ms Katrina Phillips)
Author:Jackson, GD (Dr George Jackson)
ID Code:26076
Year Published:2002
Web of Science® Times Cited:47
Deposited By:IASOS
Deposited On:2002-08-01
Last Modified:2003-05-30
Downloads:0

Repository Staff Only: item control page