Fluid-preserved fishes are one solution for assessing historical change in fish trophic level

Rachel Welicky, Terry Rolfe, Karrin Leazer, Katherine Pearson Masklenikov, Luke Tornabene, Gordon Holtgrieve & Chelsea Wood
There are few resources available for assessing historical change in fish trophic dynamics, but specimens held in natural history collections could serve as this resource. In contemporary trophic ecology studies, trophic and source information can be obtained from compound-specific stable nitrogen isotope analysis (CSIA-AA-N). Can this method yield reliable trophic information from chemically-altered fish specimens held in natural history collections? We tested whether CSIA-AA-N can be used on fluid-preserved specimens by experimentally subjecting specimens to...
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