The objective of this study was to determine lipid contents and fatty acid signatures of three common prey species, alewife (Alosa pseudoharengus), rainbow smelt (Osmerus mordax) and round goby (Neogobius melanostomus), from Lake Ontario. Fish (n = 372) were collected in spring and fall of 2010, 2011, and 2012. Our results indicated that lipid concentrations and fatty acid signatures significantly differed among prey species. Fatty acid signatures in alewife and round goby were affected by season, with high concentrations of saturated and monounsaturated fatty acids during the fall and high concentrations of polyunsaturated fatty acids during the spring. There was no significant difference in fatty acid signature of alewife between years. These data demonstrate the utility of fatty acid signatures in studies of food webs in large freshwater ecosystems.
|Presenter:||Dustin Bradley (Undergraduate Student)|
|Location:||Lobby of Edwards|
|Time:||1:15 pm (Session III)
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