Lipid and fatty acid composition of the mantle and digestive gland of four Southern Ocean squid species: implications for food-web studies
By Katrina L. Phillips, P. Nichols, G. Jackson. Antarctic Science, 2002
90 citations recorded by the source corpus.
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.
Subfields: Ecology, Ecology, Evolution, Behavior and Systematics, Social Psychology
View Paper: https://www.semanticscholar.org/paper/d56b2e86809aa7704b4b2e9bfe7fc4152e46553a
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In Ecology
- Y. Cherel
- P. Richard
- C. Guinet
- Camille Fontaine
- S. Ducatez
- Henri Weimerskirch
- Daniel P. Costa
- K. Delord
In Ecology, Evolution, Behavior and Systematics
Citations in the corpus
- Stable isotopes reveal the trophic position and mesopelagic fish diet of female southern elephant seals breeding on the Kerguelen Islands (2008, result): “Within that context, it is remarkable that lipid analysis classified elephant seals with squid known to be primarily myctophid eaters (Phillips et al. 2002, 2003), and that seals had a δ15N value not statistically different from that of the mesopelagic fish-eating warty squid (Cherel & Duhamel…”
- Cannibalism in cephalopods (2010, unknown): “However, a number of studies found no evidence for this (Semmens 1998, 2002; Moltschaniwskyj and Semmens 2000; Iba ´n ˜ez et al. 2005) or found that the lipid metabolism of cephalopods is restricted (e.g. Phillips et al. 2001, 2002 ).”
- Diet of demersal sharks and chimaeras inferred by fatty acid profiles and stomach content analysis (2011, unknown): “However, as squid have large quantities of dietary derived lipid stored in the digestive gland (Phillips et al., 2002), predation on squidmay include ingestion of lipid from secondary prey items (such as myctophid fish), obscuring a unique squid FA signature in multivariate comparisons of FA profile”