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7 <br />Table 1. Mean percentages (±1 SD) of sucker larvae consumed by fathead minnows in <br />experimental trials. Treatments (each with three replicates) consisted of fathead <br />minnow gape width classes (S=small, Wmedium, and L=large). One-way <br />ANOVA tests on aresine-transformed percentages were used to detect <br />significant differences among treatment means. Mean percentages and their <br />standard deviations presented here were calculated using transformed data, and <br />were then converted to percentages for presentation. Statistical power was <br />estimated following Cohen (1988). <br />Mean percentage <br />Starting number of larvae eaten <br />Trial Fatheads Larvae S M L ANOVA Power <br />1 1 15 0 0 0 <br />2 3 15 0 0 0 <br />3 3 20 0 13±15a 22±21a P>0.10 0.08 <br />4 6 10 98±7 75±62a 87±36a p>0.10 0.09 <br />5 6 10 10±0 5±15 43±36 P>0.10 0.17 <br />a Means were likely under-estimated and standard deviations over-estimated as a result <br />of experimental bias. One tank in each of the M and L treatments had a slightly <br />longer standpipe than the other tanks, resulting in immersion of a small ledge which <br />was used as escape cover by larvae.