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Use of fatty acids as dietary indicators in northern krill, , Meganyctiphanes norvegica, from northeastern Atlantic, Kattegat, and Mediterranean waters
Citation
Virtue, P and Mayzaud, P and Albessard, E and Nichols, PD, Use of fatty acids as dietary indicators in northern krill, , Meganyctiphanes norvegica, from northeastern Atlantic, Kattegat, and Mediterranean waters, Canadian Journal of Fisheries and Aquatic Sciences, 57, (3) pp. 104-111. ISSN 0706-652X (2000) [Refereed Article]
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Copyright Statement
Copyright 2000 NRC Canada
DOI: doi:10.1139/f00-182
Abstract
Fatty acids of the triacylglycerol (TG) and polar lipid (PL) fractions were compared from northern krill,
Meganyctiphanes norvegica, sampled in the Clyde Sea in the Atlantic, the Kattegat at the Alkor Deep, and the Ligurian
Sea in the Mediterranean. Possible biotransformations of fatty acids in the food chain were examined in mixed zooplankton
and krill faecal material from the Ligurian Sea and Kattegat. The Ligurian Sea population was distinguished
from the Kattegat and Clyde Sea populations in terms of both TG and PL fatty acid profiles. The Kattegat and Clyde
Sea populations were separated from each other in terms of their PL fatty acid profiles only. Krill sampled in winter
from all sites had significantly higher levels of 20:1 and 22:1 fatty acids in the TG fraction (917%) than krill sampled
in summer (110%). These fatty acids in particular indicate carnivorous dietary input, as they are found in high levels
in copepods, which are the major prey species of M. norvegica. Levels of 22:6(n3) were significantly higher than
20:5(n3) in Ligurian krill, which, together with other specific marker fatty acids, suggested a predominance of
dinoflagellates and other nondiatom species in their diet. TG fatty acids in Kattegat and Clyde Sea krill indicate a predominance
of diatoms in the diet.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Fatty acids, diet, krill |
| Research Division: | Biological Sciences |
| Research Group: | Ecology |
| Research Field: | Marine and estuarine ecology (incl. marine ichthyology) |
| Objective Division: | Environmental Management |
| Objective Group: | Management of Antarctic and Southern Ocean environments |
| Objective Field: | Biodiversity in Antarctic and Southern Ocean environments |
| UTAS Author: | Virtue, P (Associate Professor Patti Virtue) |
| UTAS Author: | Nichols, PD (Dr Peter Nichols) |
| ID Code: | 90445 |
| Year Published: | 2000 |
| Deposited By: | IMAS Research and Education Centre |
| Deposited On: | 2014-04-04 |
| Last Modified: | 2014-07-02 |
| Downloads: | 0 |
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