Alaska Fisheries Science Center 2021 Seminar Series - Louise Copeman
The importance of marine lipids in warming Arctic food webs: tales of juvenile fish and crab.
The storage of high levels of marine lipids in arctic consumers is generally viewed as an adaptation to extreme seasonal environments that are characterized by long periods of reduced food availability. Lipids are the most efficient means of energy storage as they contain twice the energy per unit mass as other macronutrients. At the Marine Lipid Ecology Lab (FBE program, Newport, Oregon) we are using both laboratory and field-based approaches to understand how changing environmental conditions are impacting the condition of juvenile fish and crab. The analyses of consumer total lipids combined with storage lipid classes is a sensitive method for assessing animal condition. We combine this approach with the analysis of fatty acid biomarkers to help elucidate trophic mechanisms that drive changes in fish and crab condition. Two examples of this approach will be discussed featuring juvenile Chukchi Sea Arctic cod (Boreogadus saida) and juvenile Bering Sea snow and Tanner crab (Chionoecetes spp.). In both cases (pelagic and benthic), we measured a reduction of lipid storage during recent years of intense warming.
Poster (PDF) - 2021 Louise Copeman AFSC Seminar
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Meeting Password: fish
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2021 Alaska Fisheries Science Center Seminar Series - events page and webinar recordings