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<br />Statistical Analysis <br />We ran 29 predation trials originally with three treatments: unexercised. nalvc ra/olhdl\-. \lIl\-.l'I" <br />(control fish); exercised, naIve razorback suckers; and exerciscd IC\/()!'h~IC"\ 111'11 \\l'IL' l"11,,,\',1 ii' <br />previous predation event. N umbelS of fish per- I II 'I' \ dlll'd Iii II!! l \1 " !' , I I <br />numbers in a given trial ranged from six ID ~O rd/Dr!>dl'\-. 'llckl'l, I , ' ", ' <br />was no difference in size of' sUlvl\lng 1',slllwl\\l'l'll Ilil :1:'\\ II ,I: <br />0.65). <br /> <br />The percentage of exercised. exposed razorhack suckcr\ COI1\1I1!1L'd h\ Il/l'tI,II'li' I !'"I!, ."" <br />4.41 SE) was significantly lower than for control fish (mean = 45.7.2 1: 4,XX S I) (11g 1\) (\lll'I,( i ild <br />MRPP for Blocked Data; n = 42; standardized test statistic =-2,K5: (J = (017) Tl1l'\l' 'lIl\ 1\ ,II,!",\, <br />were very similar to what we observed in 2006 (fig. 10). <br /> <br />con,m,j <br /> <br /> <br />P,""ato,-NaYve I <br /> <br /> <br />Predator-Savvy <br /> <br />215 <br /> <br />220 225 230 <br />Total Length (mm) <br /> <br />235 <br /> <br />. Survivors D Initial size I <br /> <br />Figure 11. Total lengths (mean:!:. Standard Errod of initial and surviving razorback suckers used 111 <br />predator experiments in 2007. <br /> <br />Bonytail <br />In some trials, predation occurred within a few minutes after the interdiction of prey. and in one <br />case, it took largemouth bass 48 h before they fed. Bony tail always schooled and generally graVilJlCd <br />toward the center of the tank or at the surface near the sides of the tank, We were ahle lD lOll1pklL' 2') <br />trials, which provided comparable data of largemouth bass predation on prcdalllr-~d\ \ \ ,lllli 111\\1.11<' <br />naIve bony tail. A total of88 treatment and 88 control bony tail were used 111 Ihl''''c lrl~d\ Il"1I11111~ 111 II!,' <br />loss of 18 (20 percent) treatment and 28 (32 percent) control fish (f-\ppcndl\ (j) <br /> <br />16 <br />