Necessity of lipids for growth of postlarvae Leptoclinus maculatus (Stichaeidae) in the Arctic

Lead Author Svetlana N., Pekkoeva
Institution Contact Institute of Biology of Karelian Research Centre of the Russian Academy of Sciences, Pushkinskaya, 11, 185910 Petrozavodsk, Karelia, Russia
Co-Authors Svetlana A. Murzina, Institute of Biology of Karelian Research Centre of the Russian Academy of Sciences, Russia Zinaida A. Nefedova, Institute of Biology of Karelian Research Centre of the Russian Academy of Sciences, Russia Stig Falk-Petersen, Akvaplan-niva AS, Fram Centre, Norway Jorgen Berge, The Arctic University of Norway (UiT), The University Centre in Svalbard (UNIS), Norway Ole J. Lønne, The Arctic University of Norway (UiT), The University Centre in Svalbard (UNIS), Norway Nina N. Nemova, Institute of Biology of Karelian Research Centre of the Russian Academy of Sciences, Russia
Theme Theme 1: Vulnerability of Arctic Environments
Session Name 1.1 Climate Change and Environmental Management in the Arctic
Presentation Type Poster
Abstract text Leptoclinus maculatus (Stichaeidae) is a circumpolar fish, whose population has begun increase in the Arctic Ocean; one of the main reasons of it is a climate change (Mecklenburg et al., 2011). The fish is a key link in food webs of polar ecosystems (prey and predator) and well adapted to low temperatures, special photoperiod and diet. Adults are bottom whereas postlarvae - pelagic with unusual part of body called "lipid (fat) sac". The lipid sac, accumulating high amount of lipids, is an evolutionary adaptation to surviving under extreme factors. The research is aimed to study the role of lipids of L. maculatus postlarvae in muscles and lipid sac with special attention to their function in seasonal adaptations in the Arctic. The study was carried out using facilities of the Equipment Sharing Centre of the Institute of Biology, KarRC RAS. The results show differences in quantitative and qualitative content of lipids in different tissues in seasons. So, energetic triacylglycerols were dominant in summer, whereas structural phospholipids predominate in winter in muscles of postlarvae. Postlarvae of fish are actively feed in short summer and store lipids in the lipid sac to survive during winter, when food is scarce. Lipids are very sensitive and variable components and play significant role in maintaining function of membranes, physiological activity of metabolic systems, moving and feeding of fish. The changes of lipid content of the daubed shanny may be as an indicator of temperature changes and can actively use in the area of innovation management. The research was made in the frame of the budgetary theme № 0221-2014-0003 and supported by The Presidium of RAS «Searching fundamental research for development of the Russian Arctic»; and the «SpitsEco» project (ES504895).