COMPARATIVE STUDY OF LIPID CONTENT IN LEPTOCLINUS MACULATUS POSTLARVAE FROM KONGSFJORD AND RJIPFJORD, SPITSBERGEN
A comparative study of lipid profile of the daubed shanny postlarvae <i>Leptoclinus maculatus</i> from fjords of different domains (arctic-boreal Kongsfjord and high Arctic Rjipfjord) of Spitsbergen archipelago in summer was performed. A higher level of storage of lipids in fishes from Kongsfjord compared to Rjipfjord due to triacylglycerols and wax esters was established. These differences assumed mainly related to trophic conditions of the habitat (species composition, abundance, and availability of food items). Determined higher level of cholesterol esters than wax esters at L1 stage of development of the daubed shanny postlarvae compared to older fish pointed to his active feeding mainly on phytoplankton. Differences in the content of individual classes of phospholipids may indicate adaptive changes at the level of biomembranes, contributing to the maintenance of cell homeostasis in response to abiotic environmental factors, and reflect their additional intake with food at the early stages of fish development.