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<br />o <br />l"'~) <br />i'~ <br />~ :::" <br />('.J <br /> <br />00 <br /> <br />(which is the probability of detecting a difference when one really exists) was close to zero (M. <br /> <br />Ellersieck, University of Missouri-Columbia, written communication). Inferences drawn [rom <br /> <br />tests with such low power are highly questionable and extreme caution is advised when making <br /> <br />interpretations of these data. (Zar 1996, M. Ellersieck, University of Missouri-Columbia, v.Titten <br /> <br />communication). Consequently, we do not believe that the reproductive data are complete <br /> <br />enough to draw unequivocal conclusions concerning the effects of the dietary and waterborne <br /> <br />selenium exposures tested in this study on reproduction of Colorado pikeminnow. <br /> <br />For the 10 female spav.ners, number of eggs expressed per female averaged 95,17 I and <br /> <br />ranged from 57,874 to 121,414 (Table 8). The average (and range) number eggs per gram body <br /> <br />weight was 37 (22-46) and the average (and range) number of eggs per millimeter total length <br /> <br />was 140 (84-165). Egg diameter and egg weight averaged 2.43 mm and 5.9 mg and ranged from <br /> <br />2.36 to 2.53 mrn and 5.3 to 6.6 mg, respectively. There were no significant correlations between <br /> <br />the size of female (total1ength or weight) and number of eggs per female or egg diameter. Egg <br /> <br />weight was correlated with total length of female (r=0.622, P=0.05) and was nearly correlated <br /> <br />with weight of the female (r=0.620, P=0.06). Neither egg diameter nor egg weight was <br /> <br />correlated with number of eggs per female. As expected, egg diameter was correlated with egg <br /> <br />weight (r=0.799, P=O.Ol). None of these measures of reproduction were correlated with <br /> <br />selenium exposure concentrations of the female parent. <br /> <br />Due to problems with the egg incubation system, most of the eggs not used in the <br /> <br />hatchability study were lost before viability measurements were made. Consequently, <br /> <br />fertilization rates and total egg viability of the spawns could not be estimated. <br /> <br />36 <br />