Lipids in copepodite stages of Calanus glacialis
- 119 Downloads
Calanus glacialis is a key herbivore in Arctic shelf seas. It feeds on primary producers and accumulates large energy reserves, primarily as wax esters. Lipid classes, fatty acids (FAs) and fatty alcohols (FAlcs) from copepodite stage II (CII) to adult females (AF) from Kongsfjorden, Svalbard, were studied in May 2004. Wax esters were the dominating lipid class in all stages, ranging from 34% of total lipids in CII to 60% in CIII–CV. Triacylglycerols increased from 8% of total lipids in CII to 23% in AF. In the earlier stages, 16:1n7 and 16:0 FAs and FAlcs were the major components of the neutral lipids, whereas the later stages were mainly characterized by the long-chained FAs and FAlcs 20:1n9 and 22:1n11. C. glacialis utilizes the short spring bloom to build up lipid reserves, mainly as wax esters, and it also incorporates effectively essential polyunsaturated FAs such as 20:5n3 and 22:6n3 in its polar lipids.
KeywordsTotal Lipid Adult Female Polar Lipid Lipid Class Spring Bloom
- Dalsgaard J, St. John M, Gerard K, Müller-Navarra D, Hagen W (2003) Fatty acid trophic markers in the pelagic marine environment. Adv Mar Biol 46:227–318Google Scholar
- Falk-Petersen S, Dahl T, Scott CL, Sargent JR, Gulliksen B, Kwasniewski S, Hop H, Millar RM (2002) Lipid biomarkers and trophic linkages between ctenophores and copepods in Svalbard waters. Mar Ecol-Prog Ser 227:187–194Google Scholar
- Leu E, Falk-Petersen S, Kwasniewski S, Wulff A, Edvardsen K, Hessen DO (2006) Fatty acid dynamics during the spring bloom in a high Arctic fjord: importance of abiotic factors versus community change. Can J Fish Aquat Sci 337:61–85Google Scholar
- Scott CL, Kwasniewski S, Falk-Petersen S, Sargent JR (2002) Species differences, origins and functions of fatty alcohols and fatty acids in the wax esters and phospholipids of Calanus hyperboreus, C. glacialis, and C. finmarchicus from Arctic waters. Mar Ecol-Prog Ser 235:127–134Google Scholar