Cl. Scott et al., Lipids and trophic interactions of ice fauna and pelagic zooplankton in the marginal ice zone of the Barents Sea, POLAR BIOL, 21(2), 1999, pp. 65-70
Gammarus wilkitzkii, Apherusa glacialis, Onismus nanseni, Onismus glacialis
, Boreogadus saida, Parathemisto libellula and Calanus hyperboreus, collect
ed in late June in the Barents Sea marginal ice zone, contained substantial
levels (28-51% of the dry mass) of total lipid, the highest levels (51% an
d 41% respectively) being in A. glacialis and C. hyperboreus. Neutral lipid
s were present in greater amounts than polar lipids in all species. Triacyl
glycerols were major neutral lipids in A. glacialis, G. wilkitzkii and O. n
anseni; triacylglycerols and wax esters were present in similar amounts in
O. glacialis; higher levels of wax esters than triacylglycerols occurred in
P. libellula; wax esters greatly exceeded triacylglycerols in C. hyperbore
us, the opposite being true for B. saida. Diatom fatty acid markers were pr
ominent in the triacylglycerols of G. wilkitzkii, O. nanseni, O. glacialis
and, particularly, of A. glacialis; 20:1(n-9) and 22:1(n-11) moieties were
abundant in wax esters of G. wilkitzkii, O. nanseni, O. glacialis, P. libel
lula and C. hyperboreus, and in triacylglycerols of B. saida. We deduce tha
t A. glacialis feeds mainly on ice algae and phytodetritus, G. wilkitzkii a
nd the Onismus spp. feed on calanoid copepods as well as ice algae, whereas
P. libellula and especially B. saida feed extensively on calanoid copepods
.