FORAGING HABITS OF SPRING MIGRATING WATERFOWL IN …

There was evidence that both invertebrate and seed availability did not significantly increase or decrease throughout spring (Straub 2008, Schultheis, dissertation in progress), therefore I calculated means and standard errors of invertebrates and seeds in both diet and availability samples (PROC UNIVARIATE; SAS Institute, Inc., Cary, NC) and compared them using a Z-test in program CONTRAST to investigate if the proportion of food items in duck … ................
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