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Table 3-Mean growth rate of three Colorado River endangered fishes during first and <br />second growing seasons after initial capture by electrofishing ornon-electrofishing <br />gears. Means were either least-squares means adjusted for initial fish length or simple <br />means not adjusted for fish length (denoted by asterisk). SE denotes standard error <br />about the mean and P denotes the significance of the test that means are similar <br />between sampling gears. During the first growing season after initial capture, razorback <br />sucker lengths by gear were mostly non-overlapping, so means were calculated for fish <br />in two size groups: small (<400 mm total length) and large (>400 mm total length). <br /> Interval after Sampling gear No. of fish growth/month SE P <br /> initial capture at initial capture (mm) <br /> Colorado pikeminnow <br />151 growth season Electrofishing 175 3.34 0.31 0.21 <br /> Non~lectrofishing 122 2.74 0.37 <br />2"d growth season Electrofishing 169 3.84 0.20 0.97 <br /> Non-electrofishing 91 3.82 0.27 <br /> Humpback chub <br />151 growth season Electrofishing 12 2.01 * 0.82 0.17 <br /> Non-electrofishing 46 0.73 * 0.36 <br />2nd growth season Electrofishing 6 1.23 0.14 0.39 <br /> Non-electrofishing 32 0.92 0.32 <br /> Razorback sucker <br />151 growth season Electrofishing 3 14.89 ' 0.94 0.63 <br /> (small-fish) Non-electrofishing 47 16.99 " 3.63 <br />151 growth season Electrofishing 26 0.43 * 0.33 0.11 <br /> (large-fish) Non-electrofishing 6 1.68 " 0.62 <br />2"d growth season Electrofishing 35 0.28 0.11 0.93 <br /> Non-electrofishing 8 0.31 0.23 <br />16 <br />